// Copyright (C) 2016 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only
// Qt-Security score:significant reason:default
#include "qquickstylehelper_p.h"
#include "qquickwindowsxpstyle_p.h"
#include "qquickwindowsxpstyle_p_p.h"

#include <private/qobject_p.h>
#include <private/qpaintengine_raster_p.h>
#include <qpa/qplatformnativeinterface.h>
#include <qpainter.h>
#include <qpaintengine.h>
#include <qbackingstore.h>
#include <qpixmapcache.h>
#include <qpa/qplatformnativeinterface.h>
#include <qvarlengtharray.h>
#include <qdebug.h>

#include <algorithm>

QT_BEGIN_NAMESPACE

namespace QQC2 {

// General const values
static const int windowsItemFrame        =  2; // menu item frame width
static const int windowsItemHMargin      =  3; // menu item hor text margin
static const int windowsItemVMargin      =  0; // menu item ver text margin
static const int windowsArrowHMargin     =  6; // arrow horizontal margin
static const int windowsRightBorder      = 12; // right border on windows

// Theme names matching the QWindowsXPStylePrivate::Theme enumeration.
static const wchar_t *themeNames[QWindowsXPStylePrivate::NThemes] =
{
    L"BUTTON",   L"COMBOBOX",   L"EDIT",    L"HEADER",    L"LISTVIEW",
    L"MENU",     L"PROGRESS",   L"REBAR",   L"SCROLLBAR", L"SPIN",
    L"TAB",      L"TASKDIALOG", L"TOOLBAR", L"TOOLTIP",   L"TRACKBAR",
    L"TREEVIEW", L"WINDOW",     L"STATUS",  L"TREEVIEW"
};

// Theme data helper ------------------------------------------------------------------------------
/* \internal
    Returns \c true if the themedata is valid for use.
*/
bool XPThemeData::isValid()
{
    return QWindowsXPStylePrivate::useXP() && theme >= 0 && handle();
}


/* \internal
    Returns the theme engine handle to the specific class.
    If the handle hasn't been opened before, it opens the data, and
    adds it to a static map, for caching.
*/
HTHEME XPThemeData::handle()
{
    if (!QWindowsXPStylePrivate::useXP())
        return nullptr;

    if (!htheme)
        htheme = QWindowsXPStylePrivate::createTheme(theme, QWindowsXPStylePrivate::winId(window));
    return htheme;
}

/* \internal
    Converts a QRect to the native RECT structure.
*/
RECT XPThemeData::toRECT(const QRect &qr)
{
    RECT r;
    r.left = qr.x();
    r.right = qr.x() + qr.width();
    r.top = qr.y();
    r.bottom = qr.y() + qr.height();
    return r;
}

/* \internal
    Returns the native region of a part, if the part is considered
    transparent. The region is scaled to the parts size (rect).
*/

// QWindowsXPStylePrivate -------------------------------------------------------------------------
// Static initializations
HWND QWindowsXPStylePrivate::m_vistaTreeViewHelper = nullptr;
HTHEME QWindowsXPStylePrivate::m_themes[NThemes];
bool QWindowsXPStylePrivate::use_xp = false;
QBasicAtomicInt QWindowsXPStylePrivate::ref = Q_BASIC_ATOMIC_INITIALIZER(-1); // -1 based refcounting

static void qt_add_rect(HRGN &winRegion, QRect r)
{
    HRGN rgn = CreateRectRgn(r.left(), r.top(), r.x() + r.width(), r.y() + r.height());
    if (rgn) {
        HRGN dest = CreateRectRgn(0,0,0,0);
        int result = CombineRgn(dest, winRegion, rgn, RGN_OR);
        if (result) {
            DeleteObject(winRegion);
            winRegion = dest;
        }
        DeleteObject(rgn);
    }
}

static HRGN qt_hrgn_from_qregion(const QRegion &region)
{
    HRGN hRegion = CreateRectRgn(0,0,0,0);
    if (region.rectCount() == 1) {
        qt_add_rect(hRegion, region.boundingRect());
        return hRegion;
    }
    for (const QRect &rect : region)
        qt_add_rect(hRegion, rect);
    return hRegion;
}

/* \internal
    Checks if the theme engine can/should be used, or if we should
    fall back to Windows style.
*/
bool QWindowsXPStylePrivate::useXP(bool update)
{
    if (update) {
        use_xp = IsThemeActive() && (IsAppThemed() || !QCoreApplication::instance())
                 && !QWindowsStylePrivate::isDarkMode();
    }
    return use_xp;
}

/* \internal
    Handles refcounting, and queries the theme engine for usage.
*/
void QWindowsXPStylePrivate::init(bool force)
{
    if (ref.ref() && !force)
        return;
    if (!force) // -1 based atomic refcounting
        ref.ref();

    useXP(true);
    std::fill(m_themes, m_themes + NThemes, nullptr);
}

/* \internal
    Cleans up all static data.
*/
void QWindowsXPStylePrivate::cleanup(bool force)
{
    if (bufferBitmap) {
        if (bufferDC && nullBitmap)
            SelectObject(bufferDC, nullBitmap);
        DeleteObject(bufferBitmap);
        bufferBitmap = nullptr;
    }

    if (bufferDC)
        DeleteDC(bufferDC);
    bufferDC = nullptr;

    if (ref.deref() && !force)
        return;
    if (!force)  // -1 based atomic refcounting
        ref.deref();

    use_xp = false;
    cleanupHandleMap();
}

/* In order to obtain the correct VistaTreeViewTheme (arrows for PE_IndicatorBranch),
 * we need to set the windows "explorer" theme explicitly on a native
 * window and open the "TREEVIEW" theme handle passing its window handle
 * in order to get Vista-style item view themes (particulary drawBackground()
 * for selected items needs this).
 * We invoke a service of the native Windows interface to create
 * a non-visible window handle, open the theme on it and insert it into
 * the cache so that it is found by XPThemeData::handle() first.
 */

static inline HWND createTreeViewHelperWindow()
{
    if (QPlatformNativeInterface *ni = QGuiApplication::platformNativeInterface()) {
        void *hwnd = nullptr;
        void *wndProc = reinterpret_cast<void *>(DefWindowProc);
        if (QMetaObject::invokeMethod(ni, "createMessageWindow", Qt::DirectConnection,
                                  Q_RETURN_ARG(void*, hwnd),
                                  Q_ARG(QString, QStringLiteral("QTreeViewThemeHelperWindowClass")),
                                  Q_ARG(QString, QStringLiteral("QTreeViewThemeHelperWindow")),
                                  Q_ARG(void*, wndProc)) && hwnd) {
            return reinterpret_cast<HWND>(hwnd);
        }
    }
    return nullptr;
}

bool QWindowsXPStylePrivate::initVistaTreeViewTheming()
{
    if (m_vistaTreeViewHelper)
        return true;

    m_vistaTreeViewHelper = createTreeViewHelperWindow();
    if (!m_vistaTreeViewHelper) {
        qWarning("Unable to create the treeview helper window.");
        return false;
    }
    if (FAILED(SetWindowTheme(m_vistaTreeViewHelper, L"explorer", nullptr))) {
        qErrnoWarning("SetWindowTheme() failed.");
        cleanupVistaTreeViewTheming();
        return false;
    }
    return true;
}

void QWindowsXPStylePrivate::cleanupVistaTreeViewTheming()
{
    if (m_vistaTreeViewHelper) {
        DestroyWindow(m_vistaTreeViewHelper);
        m_vistaTreeViewHelper = nullptr;
    }
}

/* \internal
    Closes all open theme data handles to ensure that we don't leak
    resources, and that we don't refere to old handles when for
    example the user changes the theme style.
*/
void QWindowsXPStylePrivate::cleanupHandleMap()
{
    for (auto &theme : m_themes) {
        if (theme) {
            CloseThemeData(theme);
            theme = nullptr;
        }
    }
    QWindowsXPStylePrivate::cleanupVistaTreeViewTheming();
}

HTHEME QWindowsXPStylePrivate::createTheme(int theme, HWND hwnd)
{
    if (Q_UNLIKELY(theme < 0 || theme >= NThemes || !hwnd)) {
        qWarning("Invalid parameters #%d, %p", theme, hwnd);
        return nullptr;
    }
    if (!m_themes[theme]) {
        const wchar_t *name = themeNames[theme];
        if (theme == VistaTreeViewTheme && QWindowsXPStylePrivate::initVistaTreeViewTheming())
            hwnd = QWindowsXPStylePrivate::m_vistaTreeViewHelper;
        m_themes[theme] = OpenThemeData(hwnd, name);
        if (Q_UNLIKELY(!m_themes[theme]))
            qErrnoWarning("OpenThemeData() failed for theme %d (%s).",
                          theme, qPrintable(themeName(theme)));
    }
    return m_themes[theme];
}

QString QWindowsXPStylePrivate::themeName(int theme)
{
    return theme >= 0 && theme < NThemes ?
           QString::fromWCharArray(themeNames[theme]) :
           QString();
}

/*
bool QWindowsXPStylePrivate::isItemViewDelegateLineEdit(const QWidget *widget)
{
    if (!widget)
        return false;
    const QWidget *parent1 = widget->parentWidget();
    // Exlude dialogs or other toplevels parented on item views.
    if (!parent1 || parent1->isWindow())
        return false;
    const QWidget *parent2 = parent1->parentWidget();
    return parent2 && widget->inherits("QLineEdit")
        && parent2->inherits("QAbstractItemView");
}
*/

/*
// Returns whether base color is set for this widget
bool QWindowsXPStylePrivate::isLineEditBaseColorSet(const QStyleOption *option, const QWidget *widget)
{
    uint resolveMask = option->palette.resolve();
    if (widget) {
        // Since spin box includes a line edit we need to resolve the palette mask also from
        // the parent, as while the color is always correct on the palette supplied by panel,
        // the mask can still be empty. If either mask specifies custom base color, use that.
#if QT_CONFIG(spinbox)
        if (const QAbstractSpinBox *spinbox = qobject_cast<QAbstractSpinBox*>(widget->parentWidget()))
            resolveMask |= spinbox->palette().resolve();
#endif // QT_CONFIG(spinbox)
    }
    return (resolveMask & (1 << QPalette::Base)) != 0;
}
*/

/*! \internal
    This function will always return a valid window handle, and might
    create a limbo widget to do so.
    We often need a window handle to for example open theme data, so
    this function ensures that we get one.
*/
HWND QWindowsXPStylePrivate::winId(const QWindow *window)
{
    if (window)
        if (const HWND hwnd = reinterpret_cast<HWND>(window->winId()))
            return hwnd;

    // Find top level with native window (there might be dialogs that do not have one).
    const auto allWindows = QGuiApplication::allWindows();
    for (const QWindow *window : allWindows) {
        if (window->isTopLevel() && window->handle() != nullptr)
            return reinterpret_cast<HWND>(window->winId());
    }

    return GetDesktopWindow();
}

/*! \internal
    Returns a native buffer (DIB section) of at least the size of
    ( \a x , \a y ). The buffer has a 32 bit depth, to not lose
    the alpha values on proper alpha-pixmaps.
*/
HBITMAP QWindowsXPStylePrivate::buffer(int w, int h)
{
    // If we already have a HBITMAP which is of adequate size, just return that
    if (bufferBitmap) {
        if (bufferW >= w && bufferH >= h)
            return bufferBitmap;
        // Not big enough, discard the old one
        if (bufferDC && nullBitmap)
            SelectObject(bufferDC, nullBitmap);
        DeleteObject(bufferBitmap);
        bufferBitmap = nullptr;
    }

    w = qMax(bufferW, w);
    h = qMax(bufferH, h);

    if (!bufferDC) {
        HDC displayDC = GetDC(nullptr);
        bufferDC = CreateCompatibleDC(displayDC);
        ReleaseDC(nullptr, displayDC);
    }

    // Define the header
    BITMAPINFO bmi;
    memset(&bmi, 0, sizeof(bmi));
    bmi.bmiHeader.biSize        = sizeof(BITMAPINFOHEADER);
    bmi.bmiHeader.biWidth       = w;
    bmi.bmiHeader.biHeight      = -h;
    bmi.bmiHeader.biPlanes      = 1;
    bmi.bmiHeader.biBitCount    = 32;
    bmi.bmiHeader.biCompression = BI_RGB;

    // Create the pixmap
    bufferPixels = nullptr;
    bufferBitmap = CreateDIBSection(bufferDC, &bmi, DIB_RGB_COLORS, reinterpret_cast<void **>(&bufferPixels), nullptr, 0);
    GdiFlush();
    nullBitmap = static_cast<HBITMAP>(SelectObject(bufferDC, bufferBitmap));

    if (Q_UNLIKELY(!bufferBitmap)) {
        qErrnoWarning("QWindowsXPStylePrivate::buffer(%dx%d), CreateDIBSection() failed.", w, h);
        bufferW = 0;
        bufferH = 0;
        return nullptr;
    }
    if (Q_UNLIKELY(!bufferPixels)) {
        qErrnoWarning("QWindowsXPStylePrivate::buffer(%dx%d), CreateDIBSection() did not allocate pixel data.", w, h);
        bufferW = 0;
        bufferH = 0;
        return nullptr;
    }
    bufferW = w;
    bufferH = h;
#ifdef DEBUG_XP_STYLE
    qDebug("Creating new dib section (%d, %d)", w, h);
#endif
    return bufferBitmap;
}

/*! \internal
    Returns \c true if the part contains any transparency at all. This does
    not indicate what kind of transparency we're dealing with. It can be
        - Alpha transparency
        - Masked transparency
*/
bool QWindowsXPStylePrivate::isTransparent(XPThemeData &themeData)
{
    return IsThemeBackgroundPartiallyTransparent(themeData.handle(), themeData.partId,
                                                 themeData.stateId);
}


/*! \internal
    Returns a QRegion of the region of the part
*/
QRegion QWindowsXPStylePrivate::region(XPThemeData &themeData)
{
    HRGN hRgn = nullptr;
    const qreal factor = QWindowsStylePrivate::nativeMetricScaleFactor(themeData.window);
    RECT rect = themeData.toRECT(QRect(themeData.rect.topLeft() / factor, themeData.rect.size() / factor));
    if (!SUCCEEDED(GetThemeBackgroundRegion(themeData.handle(), bufferHDC(), themeData.partId,
                                            themeData.stateId, &rect, &hRgn))) {
        return QRegion();
    }

    HRGN dest = CreateRectRgn(0, 0, 0, 0);
    const bool success = CombineRgn(dest, hRgn, nullptr, RGN_COPY) != ERROR;

    QRegion region;

    if (success) {
        const auto numBytes = GetRegionData(dest, 0, nullptr);
        if (numBytes == 0)
            return QRegion();

        char *buf = new (std::nothrow) char[numBytes];
        if (!buf)
            return QRegion();

        RGNDATA *rd = reinterpret_cast<RGNDATA*>(buf);
        if (GetRegionData(dest, numBytes, rd) == 0) {
            delete [] buf;
            return QRegion();
        }

        RECT *r = reinterpret_cast<RECT*>(rd->Buffer);
        for (uint i = 0; i < rd->rdh.nCount; ++i) {
            QRect rect;
            rect.setCoords(int(r->left * factor), int(r->top * factor), int((r->right - 1) * factor), int((r->bottom - 1) * factor));
            ++r;
            region |= rect;
        }

        delete [] buf;
    }

    DeleteObject(hRgn);
    DeleteObject(dest);

    return region;
}

/*! \internal
    Returns \c true if the native doublebuffer contains pixels with
    varying alpha value.
*/
bool QWindowsXPStylePrivate::hasAlphaChannel(const QRect &rect)
{
    const int startX = rect.left();
    const int startY = rect.top();
    const int w = rect.width();
    const int h = rect.height();

    int firstAlpha = -1;
    for (int y = startY; y < h/2; ++y) {
        auto buffer = reinterpret_cast<const DWORD *>(bufferPixels) + (y * bufferW);
        for (int x = startX; x < w; ++x, ++buffer) {
            int alpha = (*buffer) >> 24;
            if (firstAlpha == -1)
                firstAlpha = alpha;
            else if (alpha != firstAlpha)
                return true;
        }
    }
    return false;
}

/*! \internal
    When the theme engine paints both a true alpha pixmap and a glyph
    into our buffer, the glyph might not contain a proper alpha value.
    The rule of thumb for premultiplied pixmaps is that the color
    values of a pixel can never be higher than the alpha values, so
    we use this to our advantage here, and fix all instances where
    this occures.
*/
bool QWindowsXPStylePrivate::fixAlphaChannel(const QRect &rect)
{
    const int startX = rect.left();
    const int startY = rect.top();
    const int w = rect.width();
    const int h = rect.height();
    bool hasFixedAlphaValue = false;

    for (int y = startY; y < h; ++y) {
        auto buffer = reinterpret_cast<DWORD *>(bufferPixels) + (y * bufferW);
        for (int x = startX; x < w; ++x, ++buffer) {
            uint pixel = *buffer;
            int alpha = qAlpha(pixel);
            if (qRed(pixel) > alpha || qGreen(pixel) > alpha || qBlue(pixel) > alpha) {
                *buffer |= 0xff000000;
                hasFixedAlphaValue = true;
            }
        }
    }
    return hasFixedAlphaValue;
}

/*! \internal
    Swaps the alpha values on certain pixels:
        0xFF?????? -> 0x00??????
        0x00?????? -> 0xFF??????
    Used to determin the mask of a non-alpha transparent pixmap in
    the native doublebuffer, and swap the alphas so we may paint
    the image as a Premultiplied QImage with drawImage(), and obtain
    the mask transparency.
*/
bool QWindowsXPStylePrivate::swapAlphaChannel(const QRect &rect, bool allPixels)
{
    const int startX = rect.left();
    const int startY = rect.top();
    const int w = rect.width();
    const int h = rect.height();
    bool valueChange = false;

    // Flip the alphas, so that 255-alpha pixels are 0, and 0-alpha are 255.
    for (int y = startY; y < h; ++y) {
        auto buffer = reinterpret_cast<DWORD *>(bufferPixels) + (y * bufferW);
        for (int x = startX; x < w; ++x, ++buffer) {
            if (allPixels) {
                *buffer |= 0xFF000000;
                continue;
            }
            unsigned int alphaValue = (*buffer) & 0xFF000000;
            if (alphaValue == 0xFF000000) {
                *buffer = 0;
                valueChange = true;
            } else if (alphaValue == 0) {
                *buffer |= 0xFF000000;
                valueChange = true;
            }
        }
    }
    return valueChange;
}

#if 0
enum TransformType { SimpleTransform, HighDpiScalingTransform, ComplexTransform };

static inline TransformType transformType(const QTransform &transform, qreal devicePixelRatio)
{
    if (transform.type() <= QTransform::TxTranslate)
        return SimpleTransform;
    if (transform.type() > QTransform::TxScale)
        return ComplexTransform;
    return qFuzzyCompare(transform.m11(), devicePixelRatio)
        && qFuzzyCompare(transform.m22(), devicePixelRatio)
        ? HighDpiScalingTransform : ComplexTransform;
}

// QTBUG-60571: Exclude known fully opaque theme parts which produce values
// invalid in ARGB32_Premultiplied (for example, 0x00ffffff).
static inline bool isFullyOpaque(const XPThemeData &themeData)
{
    return themeData.theme == QWindowsXPStylePrivate::TaskDialogTheme && themeData.partId == TDLG_PRIMARYPANEL;
}
#endif

/*! \internal
    Main theme drawing function.
    Determines the correct lowlevel drawing method depending on several
    factors.
        Use drawBackgroundThruNativeBuffer() if:
            - Painter does not have an HDC
            - Theme part is flipped (mirrored horizontally)
        else use drawBackgroundDirectly().
    \note drawBackgroundThruNativeBuffer() can return false for large
    sizes due to buffer()/CreateDIBSection() failing.
*/
bool QWindowsXPStylePrivate::drawBackground(XPThemeData &themeData, qreal correctionFactor)
{
    if (themeData.rect.isEmpty())
        return true;

    QPainter *painter = themeData.painter;
    Q_ASSERT_X(painter != nullptr, "QWindowsXPStylePrivate::drawBackground()", "Trying to draw a theme part without a painter");
    if (!painter || !painter->isActive())
        return false;

    painter->save();

    // Access paintDevice via engine since the painter may
    // return the clip device which can still be a widget device in case of grabWidget().

    //bool translucentToplevel = false;
    //const QPaintDevice *paintDevice = painter->device();
    const qreal additionalDevicePixelRatio = themeData.window ? themeData.window->devicePixelRatio() : qreal(1);
    Q_ASSERT(painter->device()->devType() != QInternal::Widget);
/*
    if (paintDevice->devType() == QInternal::Widget) {
        const QWidget *window = static_cast<const QWidget *>(paintDevice)->window();
        translucentToplevel = window->testAttribute(Qt::WA_TranslucentBackground);
    }

    const TransformType tt = transformType(painter->deviceTransform(), aditionalDevicePixelRatio);

    bool canDrawDirectly = false;
    if (themeData.widget && painter->opacity() == 1.0 && !themeData.rotate
        && !isFullyOpaque(themeData)
        && tt != ComplexTransform && !themeData.mirrorVertically
        && !translucentToplevel) {
        // Draw on backing store DC only for real widgets or backing store images.
        const QPaintDevice *enginePaintDevice = painter->paintEngine()->paintDevice();
        switch (enginePaintDevice->devType()) {
        case QInternal::Widget:
            canDrawDirectly = true;
            break;
        case QInternal::Image:
            // Ensure the backing store has received as resize and is initialized.
            if (QBackingStore *bs = backingStoreForWidget(themeData.widget))
                if (bs->size().isValid() && bs->paintDevice() == enginePaintDevice)
                    canDrawDirectly = true;
        }
    }

    const HDC dc = canDrawDirectly ? hdcForWidgetBackingStore(themeData.widget) : nullptr;
    const bool result = dc && qFuzzyCompare(correctionFactor, qreal(1))
        ? drawBackgroundDirectly(dc, themeData, aditionalDevicePixelRatio)
        : drawBackgroundThruNativeBuffer(themeData, aditionalDevicePixelRatio, correctionFactor);
        */
    const bool result = drawBackgroundThruNativeBuffer(themeData, additionalDevicePixelRatio, correctionFactor);
    painter->restore();
    return result;
}

static inline QRectF scaleRect(const QRectF &r, qreal factor)
{
    return r.isValid() && factor > 1
        ? QRectF(r.topLeft() * factor, r.size() * factor)
        : r;
}

static QRegion scaleRegion(const QRegion &region, qreal factor)
{
    if (region.isEmpty() || qFuzzyCompare(factor, qreal(1)))
        return region;
    QRegion result;
    for (const QRect &rect : region)
        result += QRectF(QPointF(rect.topLeft()) * factor, QSizeF(rect.size() * factor)).toRect();
    return result;
}

/*! \internal
    This function draws the theme parts directly to the paintengines HDC.
    Do not use this if you need to perform other transformations on the
    resulting data.
*/
bool QWindowsXPStylePrivate::drawBackgroundDirectly(HDC dc, XPThemeData &themeData, qreal additionalDevicePixelRatio)
{
    QPainter *painter = themeData.painter;

    const auto &deviceTransform = painter->deviceTransform();
    const QPointF redirectionDelta(deviceTransform.dx(), deviceTransform.dy());
    const QRect area = scaleRect(QRectF(themeData.rect), additionalDevicePixelRatio).translated(redirectionDelta).toRect();

    QRegion sysRgn = painter->paintEngine()->systemClip();
    if (sysRgn.isEmpty())
        sysRgn = area;
    else
        sysRgn &= area;
    if (painter->hasClipping())
        sysRgn &= scaleRegion(painter->clipRegion(), additionalDevicePixelRatio).translated(redirectionDelta.toPoint());
    HRGN hrgn = qt_hrgn_from_qregion(sysRgn);
    SelectClipRgn(dc, hrgn);

#ifdef DEBUG_XP_STYLE
        printf("---[ DIRECT PAINTING ]------------------> Name(%-10s) Part(%d) State(%d)\n",
               qPrintable(themeData.name), themeData.partId, themeData.stateId);
        showProperties(themeData);
#endif

    RECT drawRECT = themeData.toRECT(area);
    DTBGOPTS drawOptions;
    memset(&drawOptions, 0, sizeof(drawOptions));
    drawOptions.dwSize = sizeof(drawOptions);
    drawOptions.rcClip = themeData.toRECT(sysRgn.boundingRect());
    drawOptions.dwFlags = DTBG_CLIPRECT
                          | (themeData.noBorder ? DTBG_OMITBORDER : 0)
                          | (themeData.noContent ? DTBG_OMITCONTENT : 0)
                          | (themeData.mirrorHorizontally ? DTBG_MIRRORDC : 0);

    const HRESULT result = DrawThemeBackgroundEx(themeData.handle(), dc, themeData.partId, themeData.stateId, &(drawRECT), &drawOptions);
    SelectClipRgn(dc, nullptr);
    DeleteObject(hrgn);
    return SUCCEEDED(result);
}

/*! \internal
    This function uses a secondary Native doublebuffer for painting parts.
    It should only be used when the painteengine doesn't provide a proper
    HDC for direct painting (e.g. when doing a grabWidget(), painting to
    other pixmaps etc), or when special transformations are needed (e.g.
    flips (horizonal mirroring only, vertical are handled by the theme
    engine).

    \a correctionFactor is an additional factor used to scale up controls
    that are too small on High DPI screens, as has been observed for
    WP_MDICLOSEBUTTON, WP_MDIRESTOREBUTTON, WP_MDIMINBUTTON (QTBUG-75927).
*/
bool QWindowsXPStylePrivate::drawBackgroundThruNativeBuffer(XPThemeData &themeData,
                                                            qreal additionalDevicePixelRatio,
                                                            qreal correctionFactor)
{
    QPainter *painter = themeData.painter;
    QRectF rectF = scaleRect(QRectF(themeData.rect), additionalDevicePixelRatio);

    if ((themeData.rotate + 90) % 180 == 0) { // Catch 90,270,etc.. degree flips.
        rectF = QRectF(0, 0, rectF.height(), rectF.width());
    }
    rectF.moveTo(0, 0);

    const bool hasCorrectionFactor = !qFuzzyCompare(correctionFactor, qreal(1));
    QRect rect = rectF.toRect();
    QRect drawRect = hasCorrectionFactor
        ? QRectF(rectF.topLeft() / correctionFactor, rectF.size() / correctionFactor).toRect() : rect;
    int partId = themeData.partId;
    int stateId = themeData.stateId;
    int w = rect.width();
    int h = rect.height();

    // Values initialized later, either from cached values, or from function calls
    AlphaChannelType alphaType = UnknownAlpha;
    bool stateHasData = true; // We assume so;
    bool hasAlpha = false;
    bool partIsTransparent;
    bool potentialInvalidAlpha;

    QString pixmapCacheKey = QStringLiteral("$qt_xp_");
    pixmapCacheKey.append(themeName(themeData.theme));
    pixmapCacheKey.append(QLatin1Char('p'));
    pixmapCacheKey.append(QString::number(partId));
    pixmapCacheKey.append(QLatin1Char('s'));
    pixmapCacheKey.append(QString::number(stateId));
    pixmapCacheKey.append(QLatin1Char('s'));
    pixmapCacheKey.append(themeData.noBorder ? QLatin1Char('0') : QLatin1Char('1'));
    pixmapCacheKey.append(QLatin1Char('b'));
    pixmapCacheKey.append(themeData.noContent ? QLatin1Char('0') : QLatin1Char('1'));
    pixmapCacheKey.append(QString::number(w));
    pixmapCacheKey.append(QLatin1Char('w'));
    pixmapCacheKey.append(QString::number(h));
    pixmapCacheKey.append(QLatin1Char('h'));
    pixmapCacheKey.append(QString::number(additionalDevicePixelRatio));
    pixmapCacheKey.append(QLatin1Char('d'));
    if (hasCorrectionFactor) {
        pixmapCacheKey.append(QLatin1Char('c'));
        pixmapCacheKey.append(QString::number(correctionFactor));
    }

    QPixmap cachedPixmap;
    ThemeMapKey key(themeData);
    ThemeMapData data = alphaCache.value(key);

    bool haveCachedPixmap = false;
    bool isCached = data.dataValid;
    if (isCached) {
        partIsTransparent = data.partIsTransparent;
        hasAlpha = data.hasAlphaChannel;
        alphaType = data.alphaType;
        potentialInvalidAlpha = data.hadInvalidAlpha;

        haveCachedPixmap = QPixmapCache::find(pixmapCacheKey, &cachedPixmap);

#ifdef DEBUG_XP_STYLE
        char buf[25];
        ::snprintf(buf, sizeof(buf), "+ Pixmap(%3d, %3d) ]", w, h);
        printf("---[ CACHED %s--------> Name(%-10s) Part(%d) State(%d)\n",
               haveCachedPixmap ? buf : "]-------------------",
               qPrintable(themeData.name), themeData.partId, themeData.stateId);
#endif
    } else {
        // Not cached, so get values from Theme Engine
        BOOL tmt_borderonly = false;
        COLORREF tmt_transparentcolor = 0x0;
        PROPERTYORIGIN proporigin = PO_NOTFOUND;
        GetThemeBool(themeData.handle(), themeData.partId, themeData.stateId, TMT_BORDERONLY, &tmt_borderonly);
        GetThemeColor(themeData.handle(), themeData.partId, themeData.stateId, TMT_TRANSPARENTCOLOR, &tmt_transparentcolor);
        GetThemePropertyOrigin(themeData.handle(), themeData.partId, themeData.stateId, TMT_CAPTIONMARGINS, &proporigin);

        partIsTransparent = isTransparent(themeData);

        potentialInvalidAlpha = false;
        GetThemePropertyOrigin(themeData.handle(), themeData.partId, themeData.stateId, TMT_GLYPHTYPE, &proporigin);
        if (proporigin == PO_PART || proporigin == PO_STATE) {
            int tmt_glyphtype = GT_NONE;
            GetThemeEnumValue(themeData.handle(), themeData.partId, themeData.stateId, TMT_GLYPHTYPE, &tmt_glyphtype);
            potentialInvalidAlpha = partIsTransparent && tmt_glyphtype == GT_IMAGEGLYPH;
        }

#ifdef DEBUG_XP_STYLE
        printf("---[ NOT CACHED ]-----------------------> Name(%-10s) Part(%d) State(%d)\n",
               qPrintable(themeData.name), themeData.partId, themeData.stateId);
        printf("-->partIsTransparen      = %d\n", partIsTransparent);
        printf("-->potentialInvalidAlpha = %d\n", potentialInvalidAlpha);
        showProperties(themeData);
#endif
    }
    bool wasAlphaSwapped = false;
    bool wasAlphaFixed = false;

    // OLD PSDK Workaround ------------------------------------------------------------------------
    // See if we need extra clipping for the older PSDK, which does
    // not have a DrawThemeBackgroundEx function for DTGB_OMITBORDER
    // and DTGB_OMITCONTENT
    bool addBorderContentClipping = false;
    QRegion extraClip;
    QRect area = drawRect;
    if (themeData.noBorder || themeData.noContent) {
        extraClip = area;
        // We are running on a system where the uxtheme.dll does not have
        // the DrawThemeBackgroundEx function, so we need to clip away
        // borders or contents manually.

        int borderSize = 0;
        PROPERTYORIGIN origin = PO_NOTFOUND;
        GetThemePropertyOrigin(themeData.handle(), themeData.partId, themeData.stateId, TMT_BORDERSIZE, &origin);
        GetThemeInt(themeData.handle(), themeData.partId, themeData.stateId, TMT_BORDERSIZE, &borderSize);
        borderSize *= additionalDevicePixelRatio;

        // Clip away border region
        if ((origin == PO_CLASS || origin == PO_PART || origin == PO_STATE) && borderSize > 0) {
            if (themeData.noBorder) {
                extraClip &= area;
                area = area.adjusted(-borderSize, -borderSize, borderSize, borderSize);
            }

            // Clip away content region
            if (themeData.noContent) {
                QRegion content = area.adjusted(borderSize, borderSize, -borderSize, -borderSize);
                extraClip ^= content;
            }
        }
        addBorderContentClipping = (themeData.noBorder | themeData.noContent);
    }

    QImage img;
    if (!haveCachedPixmap) { // If the pixmap is not cached, generate it! -------------------------
        if (!buffer(drawRect.width(), drawRect.height())) // Ensure a buffer of at least (w, h) in size
            return false;
        HDC dc = bufferHDC();

        // Clear the buffer
        if (alphaType != NoAlpha) {
            // Consider have separate "memset" function for small chunks for more speedup
            memset(bufferPixels, 0x00, bufferW * drawRect.height() * 4);
        }

        // Difference between area and rect
        int dx = area.x() - drawRect.x();
        int dy = area.y() - drawRect.y();

        // Adjust so painting rect starts from Origo
        rect.moveTo(0,0);
        area.moveTo(dx,dy);
        DTBGOPTS drawOptions;
        drawOptions.dwSize = sizeof(drawOptions);
        drawOptions.rcClip = themeData.toRECT(rect);
        drawOptions.dwFlags = DTBG_CLIPRECT
                            | (themeData.noBorder ? DTBG_OMITBORDER : 0)
                            | (themeData.noContent ? DTBG_OMITCONTENT : 0);

        // Drawing the part into the backing store
        RECT wRect(themeData.toRECT(area));
        DrawThemeBackgroundEx(themeData.handle(), dc, themeData.partId, themeData.stateId, &wRect, &drawOptions);

        // If not cached, analyze the buffer data to figure
        // out alpha type, and if it contains data
        if (!isCached) {
            // SHORTCUT: If the part's state has no data, cache it for NOOP later
            if (!stateHasData) {
                memset(static_cast<void *>(&data), 0, sizeof(data));
                data.dataValid = true;
                alphaCache.insert(key, data);
                return true;
            }
            hasAlpha = hasAlphaChannel(rect);
            if (!hasAlpha && partIsTransparent)
                potentialInvalidAlpha = true;
#if defined(DEBUG_XP_STYLE) && 1
            dumpNativeDIB(drawRect.width(), drawRect.height());
#endif
        }

        // Fix alpha values, if needed
        if (potentialInvalidAlpha)
            wasAlphaFixed = fixAlphaChannel(drawRect);

        QImage::Format format;
        if ((partIsTransparent && !wasAlphaSwapped) || (!partIsTransparent && hasAlpha)) {
            format = QImage::Format_ARGB32_Premultiplied;
            alphaType = RealAlpha;
        } else if (wasAlphaSwapped) {
            format = QImage::Format_ARGB32_Premultiplied;
            alphaType = MaskAlpha;
        } else {
            format = QImage::Format_RGB32;
            // The image data we got from the theme engine does not have any transparency,
            // thus the alpha channel is set to 0.
            // However, Format_RGB32 requires the alpha part to be set to 0xff, thus
            // we must flip it from 0x00 to 0xff
            swapAlphaChannel(rect, true);
            alphaType = NoAlpha;
        }
#if defined(DEBUG_XP_STYLE) && 1
        printf("Image format is: %s\n", alphaType == RealAlpha ? "Real Alpha" : alphaType == MaskAlpha ? "Masked Alpha" : "No Alpha");
#endif
        img = QImage(bufferPixels, bufferW, bufferH, format);
        if (hasCorrectionFactor)
            img = img.scaled(w, h, Qt::KeepAspectRatio, Qt::SmoothTransformation);
        img.setDevicePixelRatio(additionalDevicePixelRatio);
    }

    // Blitting backing store
    bool useRegion = partIsTransparent && !hasAlpha && !wasAlphaSwapped;

    QRegion newRegion;
    QRegion oldRegion;
    if (useRegion) {
        newRegion = region(themeData);
        oldRegion = painter->clipRegion();
        painter->setClipRegion(newRegion);
#if defined(DEBUG_XP_STYLE) && 0
        printf("Using region:\n");
        for (const QRect &r : newRegion)
            printf("    (%d, %d, %d, %d)\n", r.x(), r.y(), r.right(), r.bottom());
#endif
    }

    if (addBorderContentClipping)
        painter->setClipRegion(scaleRegion(extraClip, 1.0 / additionalDevicePixelRatio), Qt::IntersectClip);

    if (!themeData.mirrorHorizontally && !themeData.mirrorVertically && !themeData.rotate) {
        if (!haveCachedPixmap)
            painter->drawImage(themeData.rect, img, rect);
        else
            painter->drawPixmap(themeData.rect, cachedPixmap);
    } else {
        // This is _slow_!
        // Make a copy containing only the necessary data, and mirror
        // on all wanted axes. Then draw the copy.
        // If cached, the normal pixmap is cached, instead of caching
        // all possible orientations for each part and state.
        QImage imgCopy;
        if (!haveCachedPixmap)
            imgCopy = img.copy(rect);
        else
            imgCopy = cachedPixmap.toImage();

        if (themeData.rotate) {
            QTransform rotMatrix;
            rotMatrix.rotate(themeData.rotate);
            imgCopy = imgCopy.transformed(rotMatrix);
        }
        static constexpr Qt::Orientation none = Qt::Orientation(0);
        const auto orientation = (themeData.mirrorHorizontally ? Qt::Horizontal : none)
                               | (themeData.mirrorVertically ? Qt::Vertical : none);
        if (orientation)
            imgCopy.flip(orientation);
        painter->drawImage(themeData.rect, imgCopy);
    }

    if (useRegion || addBorderContentClipping) {
        if (oldRegion.isEmpty())
            painter->setClipping(false);
        else
            painter->setClipRegion(oldRegion);
    }

    // Cache the pixmap to avoid expensive swapAlphaChannel() calls
    if (!haveCachedPixmap && w && h) {
        QPixmap pix = QPixmap::fromImage(img).copy(rect);
        QPixmapCache::insert(pixmapCacheKey, pix);
#ifdef DEBUG_XP_STYLE
        printf("+++Adding pixmap to cache, size(%d, %d), wasAlphaSwapped(%d), wasAlphaFixed(%d), name(%s)\n",
               w, h, wasAlphaSwapped, wasAlphaFixed, qPrintable(pixmapCacheKey));
#endif
    }

    // Add to theme part cache
    if (!isCached) {
        memset(static_cast<void *>(&data), 0, sizeof(data));
        data.dataValid = true;
        data.partIsTransparent = partIsTransparent;
        data.alphaType = alphaType;
        data.hasAlphaChannel = hasAlpha;
        data.wasAlphaSwapped = wasAlphaSwapped;
        data.hadInvalidAlpha = wasAlphaFixed;
        alphaCache.insert(key, data);
    }
    return true;
}


// ------------------------------------------------------------------------------------------------

/*!
    \class QWindowsXPStyle
    \brief The QWindowsXPStyle class provides a Microsoft Windows XP-like look and feel.

    \ingroup appearance
    \inmodule QtWidgets
    \internal

    \warning This style is only available on the Windows XP platform
    because it makes use of Windows XP's style engine.

    Most of the functions are documented in the base classes
    QWindowsStyle, QCommonStyle, and QStyle, but the
    QWindowsXPStyle overloads of drawComplexControl(), drawControl(),
    drawControlMask(), drawPrimitive(), proxy()->subControlRect(), and
    sizeFromContents(), are documented here.

    \image qwindowsxpstyle.png
    \sa QMacStyle, QWindowsStyle, QFusionStyle
*/

/*!
    Constructs a QWindowsStyle
*/
QWindowsXPStyle::QWindowsXPStyle()
    : QWindowsStyle(*new QWindowsXPStylePrivate)
{
}

/*!
    Destroys the style.
*/
QWindowsXPStyle::~QWindowsXPStyle() = default;

/*! \reimp */
QRect QWindowsXPStyle::subElementRect(SubElement sr, const QStyleOption *option) const
{
    if (!QWindowsXPStylePrivate::useXP()) {
        return QWindowsStyle::subElementRect(sr, option);
    }

    QRect rect(option->rect);
    switch (sr) {
    case SE_DockWidgetCloseButton:
    case SE_DockWidgetFloatButton:
        rect = QWindowsStyle::subElementRect(sr, option);
        return rect.translated(0, 1);
    break;
#if 0
    case SE_TabWidgetTabContents:
        if (qstyleoption_cast<const QStyleOptionTabWidgetFrame *>(option))
        {
            rect = QWindowsStyle::subElementRect(sr, option);
            if (sr == SE_TabWidgetTabContents) {
                if (const QTabWidget *tabWidget = qobject_cast<const QTabWidget *>(widget)) {
                    if (tabWidget->documentMode())
                        break;
                }

                rect.adjust(0, 0, -2, -2);
            }
        }
        break;
    case SE_TabWidgetTabBar: {
        rect = QWindowsStyle::subElementRect(sr, option);
        const QStyleOptionTabWidgetFrame *twfOption =
            qstyleoption_cast<const QStyleOptionTabWidgetFrame *>(option);
        if (twfOption && twfOption->direction == Qt::RightToLeft
            && (twfOption->shape == QTabBar::RoundedNorth
                || twfOption->shape == QTabBar::RoundedSouth))
        {
            QStyleOptionTab otherOption;
            otherOption.shape = (twfOption->shape == QTabBar::RoundedNorth
                                ? QTabBar::RoundedEast : QTabBar::RoundedSouth);
            int overlap = proxy()->pixelMetric(PM_TabBarBaseOverlap, &otherOption);
            int borderThickness = proxy()->pixelMetric(PM_DefaultFrameWidth, option);
            rect.adjust(-overlap + borderThickness, 0, -overlap + borderThickness, 0);
        }
        break;}
#endif
    case SE_PushButtonContents:
        if (const QStyleOptionButton *btn = qstyleoption_cast<const QStyleOptionButton *>(option)) {
            MARGINS borderSize;
            if (option->window) {
                XPThemeData buttontheme(option->window, nullptr, QWindowsXPStylePrivate::ButtonTheme);
                HTHEME theme = buttontheme.handle();
                if (theme) {
                    int stateId;
                    if (!(option->state & State_Enabled))
                        stateId = PBS_DISABLED;
                    else if (option->state & State_Sunken)
                        stateId = PBS_PRESSED;
                    else if (option->state & State_MouseOver)
                        stateId = PBS_HOT;
                    else if (btn->features & QStyleOptionButton::DefaultButton)
                        stateId = PBS_DEFAULTED;
                    else
                        stateId = PBS_NORMAL;

                    int border = proxy()->pixelMetric(PM_DefaultFrameWidth, btn);
                    rect = option->rect.adjusted(border, border, -border, -border);

                    if (SUCCEEDED(GetThemeMargins(theme, nullptr, BP_PUSHBUTTON, stateId, TMT_CONTENTMARGINS, nullptr, &borderSize))) {
                        rect.adjust(borderSize.cxLeftWidth, borderSize.cyTopHeight,
                                    -borderSize.cxRightWidth, -borderSize.cyBottomHeight);
                        rect = visualRect(option->direction, option->rect, rect);
                    }
                }
            }
        }
        break;
    case SE_ProgressBarContents:
        rect = QCommonStyle::subElementRect(SE_ProgressBarGroove, option);
        if (option->state & QStyle::State_Horizontal)
            rect.adjust(4, 3, -4, -3);
        else
            rect.adjust(3, 2, -3, -2);
        break;
    default:
        rect = QWindowsStyle::subElementRect(sr, option);
    }
    return rect;
}

/*!
    \reimp
*/
void QWindowsXPStyle::drawPrimitive(PrimitiveElement pe, const QStyleOption *option, QPainter *p) const
{
    QWindowsXPStylePrivate *d = const_cast<QWindowsXPStylePrivate*>(d_func());

    if (!QWindowsXPStylePrivate::useXP()) {
        QWindowsStyle::drawPrimitive(pe, option, p);
        return;
    }

    int themeNumber = -1;
    int partId = 0;
    int stateId = 0;
    QRect rect = option->rect;
    State flags = option->state;
    bool hMirrored = false;
    bool vMirrored = false;
    bool noBorder = false;
    bool noContent = false;
    int  rotate = 0;

    switch (pe) {
#if 0
    case PE_FrameTabBarBase:
        if (const QStyleOptionTabBarBase *tbb
                = qstyleoption_cast<const QStyleOptionTabBarBase *>(option)) {
            p->save();
            switch (tbb->shape) {
            case QTabBar::RoundedNorth:
                p->setPen(QPen(tbb->palette.dark(), 0));
                p->drawLine(tbb->rect.topLeft(), tbb->rect.topRight());
                break;
            case QTabBar::RoundedWest:
                p->setPen(QPen(tbb->palette.dark(), 0));
                p->drawLine(tbb->rect.left(), tbb->rect.top(), tbb->rect.left(), tbb->rect.bottom());
                break;
            case QTabBar::RoundedSouth:
                p->setPen(QPen(tbb->palette.dark(), 0));
                p->drawLine(tbb->rect.left(), tbb->rect.top(),
                            tbb->rect.right(), tbb->rect.top());
                break;
            case QTabBar::RoundedEast:
                p->setPen(QPen(tbb->palette.dark(), 0));
                p->drawLine(tbb->rect.topLeft(), tbb->rect.bottomLeft());
                break;
            case QTabBar::TriangularNorth:
            case QTabBar::TriangularEast:
            case QTabBar::TriangularWest:
            case QTabBar::TriangularSouth:
                p->restore();
                QWindowsStyle::drawPrimitive(pe, option, p);
                return;
            }
            p->restore();
        }
        return;
#endif
    case PE_PanelButtonBevel:
        themeNumber = QWindowsXPStylePrivate::ButtonTheme;
        partId = BP_PUSHBUTTON;
        if (!(flags & State_Enabled))
            stateId = PBS_DISABLED;
        else if ((flags & State_Sunken) || (flags & State_On))
            stateId = PBS_PRESSED;
        else if (flags & State_MouseOver)
            stateId = PBS_HOT;
        //else if (flags & State_ButtonDefault)
        //    stateId = PBS_DEFAULTED;
        else
            stateId = PBS_NORMAL;
        break;

    case PE_PanelButtonTool:
//        if (widget && widget->inherits("QDockWidgetTitleButton")) {
//            if (const QWidget *dw = widget->parentWidget())
//                if (dw->isWindow())
//                    return;
//        }
        themeNumber = QWindowsXPStylePrivate::ToolBarTheme;
        partId = TP_BUTTON;
        if (!(flags & State_Enabled))
            stateId = TS_DISABLED;
        else if (flags & State_Sunken)
            stateId = TS_PRESSED;
        else if (flags & State_MouseOver)
            stateId = flags & State_On ? TS_HOTCHECKED : TS_HOT;
        else if (flags & State_On)
            stateId = TS_CHECKED;
        else if (!(flags & State_AutoRaise))
            stateId = TS_HOT;
        else
            stateId = TS_NORMAL;
        break;

    case PE_IndicatorButtonDropDown:
        themeNumber = QWindowsXPStylePrivate::ToolBarTheme;
        partId = TP_SPLITBUTTONDROPDOWN;
        if (!(flags & State_Enabled))
            stateId = TS_DISABLED;
        else if (flags & State_Sunken)
            stateId = TS_PRESSED;
        else if (flags & State_MouseOver)
            stateId = flags & State_On ? TS_HOTCHECKED : TS_HOT;
        else if (flags & State_On)
            stateId = TS_CHECKED;
        else if (!(flags & State_AutoRaise))
            stateId = TS_HOT;
        else
            stateId = TS_NORMAL;
        if (option->direction == Qt::RightToLeft)
            hMirrored = true;
        break;

    case PE_IndicatorCheckBox:
        themeNumber = QWindowsXPStylePrivate::ButtonTheme;
        partId = BP_CHECKBOX;
        if (!(flags & State_Enabled))
            stateId = CBS_UNCHECKEDDISABLED;
        else if (flags & State_Sunken)
            stateId = CBS_UNCHECKEDPRESSED;
        else if (flags & State_MouseOver)
            stateId = CBS_UNCHECKEDHOT;
        else
            stateId = CBS_UNCHECKEDNORMAL;

        if (flags & State_On)
            stateId += CBS_CHECKEDNORMAL-1;
        else if (flags & State_NoChange)
            stateId += CBS_MIXEDNORMAL-1;

        break;

    case PE_IndicatorRadioButton:
        themeNumber = QWindowsXPStylePrivate::ButtonTheme;
        partId = BP_RADIOBUTTON;
        if (!(flags & State_Enabled))
            stateId = RBS_UNCHECKEDDISABLED;
        else if (flags & State_Sunken)
            stateId = RBS_UNCHECKEDPRESSED;
        else if (flags & State_MouseOver)
            stateId = RBS_UNCHECKEDHOT;
        else
            stateId = RBS_UNCHECKEDNORMAL;

        if (flags & State_On)
            stateId += RBS_CHECKEDNORMAL-1;
        break;

    case PE_IndicatorDockWidgetResizeHandle:
        return;

case PE_Frame:
    {
        if (flags & State_Raised)
            return;
        themeNumber = QWindowsXPStylePrivate::ListViewTheme;
        partId = LVP_LISTGROUP;
        XPThemeData theme(option->window, nullptr, themeNumber, partId);

        if (!(flags & State_Enabled))
            stateId = ETS_DISABLED;
        else
            stateId = ETS_NORMAL;
        int fillType;
        if (GetThemeEnumValue(theme.handle(), partId, stateId, TMT_BGTYPE, &fillType) == S_OK) {
            if (fillType == BT_BORDERFILL) {
                COLORREF bcRef;
                GetThemeColor(theme.handle(), partId, stateId, TMT_BORDERCOLOR, &bcRef);
                QColor bordercolor(qRgb(GetRValue(bcRef), GetGValue(bcRef), GetBValue(bcRef)));
                QPen oldPen = p->pen();
                // int borderSize = 1;
                // GetThemeInt(theme.handle(), partId, stateId, TMT_BORDERCOLOR, &borderSize);

                // Inner white border
                p->setPen(QPen(option->palette.base().color(), 0));
                const qreal dpi = QStyleHelper::dpi(option);
                const auto topLevelAdjustment = QStyleHelper::dpiScaled(0.5, dpi);
                const auto bottomRightAdjustment = QStyleHelper::dpiScaled(-1, dpi);
                p->drawRect(QRectF(option->rect).adjusted(topLevelAdjustment, topLevelAdjustment,
                                                          bottomRightAdjustment, bottomRightAdjustment));
                // Outer dark border
                p->setPen(QPen(bordercolor, 0));
                p->drawRect(QRectF(option->rect).adjusted(0, 0, -topLevelAdjustment, -topLevelAdjustment));
                p->setPen(oldPen);
                return;
            }
            if (fillType == BT_NONE)
                return;
        }
        break;
    }
    case PE_FrameLineEdit: {
        // we try to check if this lineedit is a delegate on a QAbstractItemView-derived class.
        /*
        if (QWindowsXPStylePrivate::isItemViewDelegateLineEdit(widget)) {
            QPen oldPen = p->pen();
            // Inner white border
            p->setPen(QPen(option->palette.base().color(), 1));
            p->drawRect(option->rect.adjusted(1, 1, -2, -2));
            // Outer dark border
            p->setPen(QPen(option->palette.shadow().color(), 1));
            p->drawRect(option->rect.adjusted(0, 0, -1, -1));
            p->setPen(oldPen);
            return;
        }
        */
        if (qstyleoption_cast<const QStyleOptionFrame *>(option)) {
            themeNumber = QWindowsXPStylePrivate::EditTheme;
            partId = EP_EDITTEXT;
            noContent = true;
            if (!(flags & State_Enabled))
                stateId = ETS_DISABLED;
            else
                stateId = ETS_NORMAL;
        }
        break;
    }

    case PE_PanelLineEdit:
        if (const QStyleOptionFrame *panel = qstyleoption_cast<const QStyleOptionFrame *>(option)) {
            themeNumber = QWindowsXPStylePrivate::EditTheme;
            partId = EP_EDITTEXT;
            noBorder = true;
            bool isEnabled = flags & State_Enabled;

            stateId = isEnabled ? ETS_NORMAL : ETS_DISABLED;

            /*if (QWindowsXPStylePrivate::isLineEditBaseColorSet(option, widget)) {
                p->fillRect(panel->rect, panel->palette.brush(QPalette::Base));
            } else*/ {
                XPThemeData theme(nullptr, p, themeNumber, partId, stateId, rect);
                if (!theme.isValid()) {
                    QWindowsStyle::drawPrimitive(pe, option, p);
                    return;
                }
                int bgType;
                GetThemeEnumValue(theme.handle(), partId, stateId, TMT_BGTYPE, &bgType);
                if ( bgType == BT_IMAGEFILE ) {
                    theme.mirrorHorizontally = hMirrored;
                    theme.mirrorVertically = vMirrored;
                    theme.noBorder = noBorder;
                    theme.noContent = noContent;
                    theme.rotate = rotate;
                    d->drawBackground(theme);
                } else {
                    QBrush fillColor = option->palette.brush(QPalette::Base);

                    if (!isEnabled) {
                        PROPERTYORIGIN origin = PO_NOTFOUND;
                        GetThemePropertyOrigin(theme.handle(), theme.partId, theme.stateId, TMT_FILLCOLOR, &origin);
                        // Use only if the fill property comes from our part
                        if ((origin == PO_PART || origin == PO_STATE)) {
                            COLORREF bgRef;
                            GetThemeColor(theme.handle(), partId, stateId, TMT_FILLCOLOR, &bgRef);
                            fillColor = QBrush(qRgb(GetRValue(bgRef), GetGValue(bgRef), GetBValue(bgRef)));
                        }
                    }
                    p->fillRect(option->rect, fillColor);
                }
            }

            if (panel->lineWidth > 0)
                proxy()->drawPrimitive(PE_FrameLineEdit, panel, p);
            return;
        }
        break;
#if 0
    case PE_FrameTabWidget:
        if (const QStyleOptionTabWidgetFrame *tab = qstyleoption_cast<const QStyleOptionTabWidgetFrame *>(option))
        {
            themeNumber = QWindowsXPStylePrivate::TabTheme;
            partId = TABP_PANE;

            if (option->window) {
                bool useGradient = true;
                const int maxlength = 256;
                wchar_t themeFileName[maxlength];
                wchar_t themeColor[maxlength];
                // Due to a a scaling issue with the XP Silver theme, tab gradients are not used with it
                if (GetCurrentThemeName(themeFileName, maxlength, themeColor, maxlength, nullptr, 0) == S_OK) {
                    wchar_t *offset = nullptr;
                    if ((offset = wcsrchr(themeFileName, QChar(QLatin1Char('\\')).unicode())) != nullptr) {
                        offset++;
                        if (!lstrcmp(offset, L"Luna.msstyles") && !lstrcmp(offset, L"Metallic")) {
                            useGradient = false;
                        }
                    }
                }
                // This should work, but currently there's an error in the ::drawBackgroundDirectly()
                // code, when using the HDC directly..
                if (useGradient) {
                    QStyleOptionTabWidgetFrame frameOpt = *tab;
                    //frameOpt.rect = widget->rect();

                    QRect contentsRect = subElementRect(SE_TabWidgetTabContents, &frameOpt);
                    QRegion reg = option->rect;
                    reg -= contentsRect;
                    p->setClipRegion(reg);
                    XPThemeData theme(option->window, p, themeNumber, partId, stateId, rect);
                    theme.mirrorHorizontally = hMirrored;
                    theme.mirrorVertically = vMirrored;
                    d->drawBackground(theme);
                    p->setClipRect(contentsRect);
                    partId = TABP_BODY;
                }
            }
            switch (tab->shape) {
            case QTabBar::RoundedNorth:
            case QTabBar::TriangularNorth:
                break;
            case QTabBar::RoundedSouth:
            case QTabBar::TriangularSouth:
                vMirrored = true;
                break;
            case QTabBar::RoundedEast:
            case QTabBar::TriangularEast:
                rotate = 90;
                break;
            case QTabBar::RoundedWest:
            case QTabBar::TriangularWest:
                rotate = 90;
                hMirrored = true;
                break;
            default:
                break;
            }
        }
        break;
#endif
    case PE_FrameMenu:
        p->save();
        p->setPen(option->palette.dark().color());
        p->drawRect(rect.adjusted(0, 0, -1, -1));
        p->restore();
        return;

    case PE_PanelMenuBar:
        break;

 case PE_FrameDockWidget:
     if (const QStyleOptionFrame *frm = qstyleoption_cast<const QStyleOptionFrame *>(option))
        {
            themeNumber = QWindowsXPStylePrivate::WindowTheme;
            if (flags & State_Active)
                stateId = FS_ACTIVE;
            else
                stateId = FS_INACTIVE;

            int fwidth = proxy()->pixelMetric(PM_DockWidgetFrameWidth, frm);

            XPThemeData theme(option->window, p, themeNumber, 0, stateId);
            if (!theme.isValid())
                break;
            theme.rect = QRect(frm->rect.x(), frm->rect.y(), frm->rect.x()+fwidth, frm->rect.height()-fwidth);           theme.partId = WP_SMALLFRAMELEFT;
            d->drawBackground(theme);
            theme.rect = QRect(frm->rect.width()-fwidth, frm->rect.y(), fwidth, frm->rect.height()-fwidth);
            theme.partId = WP_SMALLFRAMERIGHT;
            d->drawBackground(theme);
            theme.rect = QRect(frm->rect.x(), frm->rect.bottom()-fwidth+1, frm->rect.width(), fwidth);
            theme.partId = WP_SMALLFRAMEBOTTOM;
            d->drawBackground(theme);
            return;
        }
        break;

    case PE_IndicatorHeaderArrow:
        {
#if 0 // XP theme engine doesn't know about this :(
            name = QWindowsXPStylePrivate::HeaderTheme;
            partId = HP_HEADERSORTARROW;
            if (flags & State_Down)
                stateId = HSAS_SORTEDDOWN;
            else
                stateId = HSAS_SORTEDUP;
#else
            if (const QStyleOptionHeader *header = qstyleoption_cast<const QStyleOptionHeader *>(option)) {
                p->save();
                p->setPen(option->palette.dark().color());
                p->translate(0, option->rect.height()/2 - 4);
                if (header->sortIndicator & QStyleOptionHeader::SortUp) { // invert logic to follow Windows style guide
                    p->drawLine(option->rect.x(), option->rect.y(), option->rect.x()+8, option->rect.y());
                    p->drawLine(option->rect.x()+1, option->rect.y()+1, option->rect.x()+7, option->rect.y()+1);
                    p->drawLine(option->rect.x()+2, option->rect.y()+2, option->rect.x()+6, option->rect.y()+2);
                    p->drawLine(option->rect.x()+3, option->rect.y()+3, option->rect.x()+5, option->rect.y()+3);
                    p->drawPoint(option->rect.x()+4, option->rect.y()+4);
                } else if (header->sortIndicator & QStyleOptionHeader::SortDown) {
                    p->drawLine(option->rect.x(), option->rect.y()+4, option->rect.x()+8, option->rect.y()+4);
                    p->drawLine(option->rect.x()+1, option->rect.y()+3, option->rect.x()+7, option->rect.y()+3);
                    p->drawLine(option->rect.x()+2, option->rect.y()+2, option->rect.x()+6, option->rect.y()+2);
                    p->drawLine(option->rect.x()+3, option->rect.y()+1, option->rect.x()+5, option->rect.y()+1);
                    p->drawPoint(option->rect.x()+4, option->rect.y());
                }
                p->restore();
                return;
            }
#endif
        }
        break;

    case PE_FrameStatusBarItem:
        themeNumber = QWindowsXPStylePrivate::StatusTheme;
        partId = SP_PANE;
        break;

    case PE_FrameGroupBox:
        themeNumber = QWindowsXPStylePrivate::ButtonTheme;
        partId = BP_GROUPBOX;
        if (!(flags & State_Enabled))
            stateId = GBS_DISABLED;
        else
            stateId = GBS_NORMAL;
        if (const QStyleOptionFrame *frame = qstyleoption_cast<const QStyleOptionFrame *>(option)) {
            if (frame->features & QStyleOptionFrame::Flat) {
                // Windows XP does not have a theme part for a flat GroupBox, paint it with the windows style
                QRect fr = frame->rect;
                QPoint p1(fr.x(), fr.y() + 1);
                QPoint p2(fr.x() + fr.width(), p1.y() + 1);
                rect = QRect(p1, p2);
                themeNumber = -1;
            }
        }
        break;

    case PE_IndicatorProgressChunk:
        {
        Qt::Orientation orient = Qt::Horizontal;
        bool inverted = false;
        if (const QStyleOptionProgressBar *pb = qstyleoption_cast<const QStyleOptionProgressBar *>(option)) {
            orient = pb->state & QStyle::State_Horizontal ? Qt::Horizontal : Qt::Vertical;
            inverted = pb->invertedAppearance;
        }
        if (orient == Qt::Horizontal) {
            partId = PP_CHUNK;
            rect = QRect(option->rect.x(), option->rect.y(), option->rect.width(), option->rect.height() );
            if (inverted && option->direction == Qt::LeftToRight)
                hMirrored = true;
        } else {
            partId = PP_CHUNKVERT;
            rect = QRect(option->rect.x(), option->rect.y(), option->rect.width(), option->rect.height());
        }
        themeNumber = QWindowsXPStylePrivate::ProgressTheme;
        stateId = 1;
        }
        break;

    case PE_FrameWindow:
        if (const QStyleOptionFrame *frm = qstyleoption_cast<const QStyleOptionFrame *>(option))
        {
            themeNumber = QWindowsXPStylePrivate::WindowTheme;
            if (flags & State_Active)
                stateId = FS_ACTIVE;
            else
                stateId = FS_INACTIVE;

            int fwidth = int((frm->lineWidth + frm->midLineWidth) / QWindowsStylePrivate::nativeMetricScaleFactor(option));

            XPThemeData theme(option->window, p, themeNumber, 0, stateId);
            if (!theme.isValid())
                break;

            // May fail due to too-large buffers for large widgets, fall back to Windows style.
            theme.rect = QRect(option->rect.x(), option->rect.y()+fwidth, option->rect.x()+fwidth, option->rect.height()-fwidth);
            theme.partId = WP_FRAMELEFT;
            if (!d->drawBackground(theme)) {
                QWindowsStyle::drawPrimitive(pe, option, p);
                return;
            }
            theme.rect = QRect(option->rect.width()-fwidth, option->rect.y()+fwidth, fwidth, option->rect.height()-fwidth);
            theme.partId = WP_FRAMERIGHT;
            if (!d->drawBackground(theme)) {
                QWindowsStyle::drawPrimitive(pe, option, p);
                return;
            }
            theme.rect = QRect(option->rect.x(), option->rect.height()-fwidth, option->rect.width(), fwidth);
            theme.partId = WP_FRAMEBOTTOM;
            if (!d->drawBackground(theme)) {
                QWindowsStyle::drawPrimitive(pe, option, p);
                return;
            }
            theme.rect = QRect(option->rect.x(), option->rect.y(), option->rect.width(), option->rect.y()+fwidth);
            theme.partId = WP_CAPTION;
            if (!d->drawBackground(theme))
                QWindowsStyle::drawPrimitive(pe, option, p);
            return;
        }
        break;

    case PE_IndicatorBranch:
        {
            static const int decoration_size = 9;
            int mid_h = option->rect.x() + option->rect.width() / 2;
            int mid_v = option->rect.y() + option->rect.height() / 2;
            int bef_h = mid_h;
            int bef_v = mid_v;
            int aft_h = mid_h;
            int aft_v = mid_v;
            QBrush brush(option->palette.dark().color(), Qt::Dense4Pattern);
            if (option->state & State_Item) {
                if (option->direction == Qt::RightToLeft)
                    p->fillRect(option->rect.left(), mid_v, bef_h - option->rect.left(), 1, brush);
                else
                    p->fillRect(aft_h, mid_v, option->rect.right() - aft_h + 1, 1, brush);
            }
            if (option->state & State_Sibling)
                p->fillRect(mid_h, aft_v, 1, option->rect.bottom() - aft_v + 1, brush);
            if (option->state & (State_Open | State_Children | State_Item | State_Sibling))
                p->fillRect(mid_h, option->rect.y(), 1, bef_v - option->rect.y(), brush);
            if (option->state & State_Children) {
                int delta = decoration_size / 2;
                bef_h -= delta;
                bef_v -= delta;
                aft_h += delta;
                aft_v += delta;
                XPThemeData theme(nullptr, p, QWindowsXPStylePrivate::XpTreeViewTheme);
                theme.rect = QRect(bef_h, bef_v, decoration_size, decoration_size);
                theme.partId = TVP_GLYPH;
                theme.stateId = flags & QStyle::State_Open ? GLPS_OPENED : GLPS_CLOSED;
                d->drawBackground(theme);
            }
        }
        return;

    case PE_IndicatorToolBarSeparator:
        if (option->rect.height() < 3) {
            // XP style requires a few pixels for the separator
            // to be visible.
            QWindowsStyle::drawPrimitive(pe, option, p);
            return;
        }
        themeNumber = QWindowsXPStylePrivate::ToolBarTheme;
        partId = TP_SEPARATOR;

        if (option->state & State_Horizontal)
            partId = TP_SEPARATOR;
        else
            partId = TP_SEPARATORVERT;

        break;

    case PE_IndicatorToolBarHandle:

        themeNumber = QWindowsXPStylePrivate::RebarTheme;
        partId = RP_GRIPPER;
        if (option->state & State_Horizontal) {
            partId = RP_GRIPPER;
            rect.adjust(0, 0, -2, 0);
        }
        else {
            partId = RP_GRIPPERVERT;
            rect.adjust(0, 0, 0, -2);
        }
        break;

    case PE_IndicatorItemViewItemCheck: {
        QStyleOptionButton button;
        button.QStyleOption::operator=(*option);
        button.state &= ~State_MouseOver;
        proxy()->drawPrimitive(PE_IndicatorCheckBox, &button, p);
        return;
    }

    default:
        break;
    }

    XPThemeData theme(option->window, p, themeNumber, partId, stateId, rect);
    if (!theme.isValid()) {
        QWindowsStyle::drawPrimitive(pe, option, p);
        return;
    }
    theme.mirrorHorizontally = hMirrored;
    theme.mirrorVertically = vMirrored;
    theme.noBorder = noBorder;
    theme.noContent = noContent;
    theme.rotate = rotate;
    d->drawBackground(theme);
}

/*!
    \reimp
*/
void QWindowsXPStyle::drawControl(ControlElement element, const QStyleOption *option, QPainter *p) const
{
  QWindowsXPStylePrivate *d = const_cast<QWindowsXPStylePrivate*>(d_func());
    if (!QWindowsXPStylePrivate::useXP()) {
        QWindowsStyle::drawControl(element, option, p);
        return;
    }

    QRect rect(option->rect);
    State flags = option->state;

    int rotate = 0;
    bool hMirrored = false;
    bool vMirrored = false;

    int themeNumber = -1;
    int partId = 0;
    int stateId = 0;
    switch (element) {
    case CE_SizeGrip:
        {
            themeNumber = QWindowsXPStylePrivate::StatusTheme;
            partId = SP_GRIPPER;
            XPThemeData theme(nullptr, p, themeNumber, partId);
            QSize size = (theme.size() * QWindowsStylePrivate::nativeMetricScaleFactor(option)).toSize();
            size.rheight()--;
            if (const QStyleOptionSizeGrip *sg = qstyleoption_cast<const QStyleOptionSizeGrip *>(option)) {
                switch (sg->corner) {
                    case Qt::BottomRightCorner:
                        rect = QRect(QPoint(rect.right() - size.width(), rect.bottom() - size.height()), size);
                        break;
                    case Qt::BottomLeftCorner:
                        rect = QRect(QPoint(rect.left() + 1, rect.bottom() - size.height()), size);
                        hMirrored = true;
                        break;
                    case Qt::TopRightCorner:
                        rect = QRect(QPoint(rect.right() - size.width(), rect.top() + 1), size);
                        vMirrored = true;
                        break;
                    case Qt::TopLeftCorner:
                        rect = QRect(rect.topLeft() + QPoint(1, 1), size);
                        hMirrored = vMirrored = true;
                }
            }
        }
        break;

    case CE_HeaderSection:
        themeNumber = QWindowsXPStylePrivate::HeaderTheme;
        partId = HP_HEADERITEM;
        if (flags & State_Sunken)
            stateId = HIS_PRESSED;
        else if (flags & State_MouseOver)
            stateId = HIS_HOT;
        else
            stateId = HIS_NORMAL;
        break;

    case CE_Splitter:
        p->eraseRect(option->rect);
        return;

    case CE_PushButtonBevel:
        if (const QStyleOptionButton *btn = qstyleoption_cast<const QStyleOptionButton *>(option))
        {
            themeNumber = QWindowsXPStylePrivate::ButtonTheme;
            partId = BP_PUSHBUTTON;
            bool justFlat = ((btn->features & QStyleOptionButton::Flat) && !(flags & (State_On|State_Sunken)))
                || ((btn->features & QStyleOptionButton::CommandLinkButton)
                    && !(flags & State_MouseOver)
                    && !(btn->features & QStyleOptionButton::DefaultButton));
            if (!(flags & State_Enabled) && !(btn->features & QStyleOptionButton::Flat))
                stateId = PBS_DISABLED;
            else if (justFlat)
                ;
            else if (flags & (State_Sunken | State_On))
                stateId = PBS_PRESSED;
            else if (flags & State_MouseOver)
                stateId = PBS_HOT;
            else if (btn->features & QStyleOptionButton::DefaultButton)
                stateId = PBS_DEFAULTED;
            else
                stateId = PBS_NORMAL;

            if (!justFlat) {
                XPThemeData theme(option->window, p, themeNumber, partId, stateId, rect);
                d->drawBackground(theme);
            }

            if (btn->features & QStyleOptionButton::HasMenu) {
                int mbiw = 0, mbih = 0;
                XPThemeData theme(option->window, nullptr,
                                  QWindowsXPStylePrivate::ToolBarTheme,
                                  TP_SPLITBUTTONDROPDOWN);
                if (theme.isValid()) {
                    const QSize size = (theme.size() * QWindowsStylePrivate::nativeMetricScaleFactor(option)).toSize();
                    mbiw = size.width();
                    mbih = size.height();
                }

                QRect ir = btn->rect;
                QStyleOptionButton newBtn = *btn;
                newBtn.rect = QRect(ir.right() - mbiw - 1, 1 + (ir.height()/2) - (mbih/2), mbiw, mbih);
                proxy()->drawPrimitive(PE_IndicatorArrowDown, &newBtn, p);
            }
            return;
        }
        break;
    case CE_TabBarTab:
        if (const QStyleOptionTab *tab = qstyleoption_cast<const QStyleOptionTab *>(option))
        {
            stateId = tab->state & State_Enabled ? TIS_NORMAL : TIS_DISABLED;
        }
    break;
#if 0
    case CE_TabBarTabShape:
        if (const QStyleOptionTab *tab = qstyleoption_cast<const QStyleOptionTab *>(option))
        {
            themeNumber = QWindowsXPStylePrivate::TabTheme;
            bool isDisabled = !(tab->state & State_Enabled);
            bool hasFocus = tab->state & State_HasFocus;
            bool isHot = tab->state & State_MouseOver;
            bool selected = tab->state & State_Selected;
            bool lastTab = tab->position == QStyleOptionTab::End;
            bool firstTab = tab->position == QStyleOptionTab::Beginning;
            bool onlyOne = tab->position == QStyleOptionTab::OnlyOneTab;
            bool leftAligned = proxy()->styleHint(SH_TabBar_Alignment, tab) == Qt::AlignLeft;
            bool centerAligned = proxy()->styleHint(SH_TabBar_Alignment, tab) == Qt::AlignCenter;
            int borderThickness = proxy()->pixelMetric(PM_DefaultFrameWidth, option);
            int tabOverlap = proxy()->pixelMetric(PM_TabBarTabOverlap, option);

            if (isDisabled)
                stateId = TIS_DISABLED;
            else if (selected)
                stateId = TIS_SELECTED;
            else if (hasFocus)
                stateId = TIS_FOCUSED;
            else if (isHot)
                stateId = TIS_HOT;
            else
                stateId = TIS_NORMAL;

            // Selecting proper part depending on position
            if (firstTab || onlyOne) {
                if (leftAligned) {
                    partId = TABP_TABITEMLEFTEDGE;
                } else if (centerAligned) {
                    partId = TABP_TABITEM;
                } else { // rightAligned
                    partId = TABP_TABITEMRIGHTEDGE;
                }
            } else {
                partId = TABP_TABITEM;
            }

            if (tab->direction == Qt::RightToLeft
                && (tab->shape == QTabBar::RoundedNorth
                    || tab->shape == QTabBar::RoundedSouth)) {
                bool temp = firstTab;
                firstTab = lastTab;
                lastTab = temp;
            }
            bool begin = firstTab || onlyOne;
            bool end = lastTab || onlyOne;
            switch (tab->shape) {
            case QTabBar::RoundedNorth:
                if (selected)
                    rect.adjust(begin ? 0 : -tabOverlap, 0, end ? 0 : tabOverlap, borderThickness);
                else
                    rect.adjust(begin? tabOverlap : 0, tabOverlap, end ? -tabOverlap : 0, 0);
                break;
            case QTabBar::RoundedSouth:
                //vMirrored = true;
                rotate = 180; // Not 100% correct, but works
                if (selected)
                    rect.adjust(begin ? 0 : -tabOverlap , -borderThickness, end ? 0 : tabOverlap, 0);
                else
                    rect.adjust(begin ? tabOverlap : 0, 0, end ? -tabOverlap : 0 , -tabOverlap);
                break;
            case QTabBar::RoundedEast:
                rotate = 90;
                if (selected) {
                    rect.adjust(-borderThickness, begin ? 0 : -tabOverlap, 0, end ? 0 : tabOverlap);
                }else{
                    rect.adjust(0, begin ? tabOverlap : 0, -tabOverlap, end ? -tabOverlap : 0);
                }
                break;
            case QTabBar::RoundedWest:
                hMirrored = true;
                rotate = 90;
                if (selected) {
                    rect.adjust(0, begin ? 0 : -tabOverlap, borderThickness, end ? 0 : tabOverlap);
                }else{
                    rect.adjust(tabOverlap, begin ? tabOverlap : 0, 0, end ? -tabOverlap : 0);
                }
                break;
            default:
                themeNumber = -1; // Do our own painting for triangular
                break;
            }

            if (!selected) {
                switch (tab->shape) {
                case QTabBar::RoundedNorth:
                    rect.adjust(0,0, 0,-1);
                    break;
                case QTabBar::RoundedSouth:
                    rect.adjust(0,1, 0,0);
                    break;
                case QTabBar::RoundedEast:
                    rect.adjust( 1,0, 0,0);
                    break;
                case QTabBar::RoundedWest:
                    rect.adjust(0,0, -1,0);
                    break;
                default:
                    break;
                }
            }
        }
        break;
#endif
    case CE_ProgressBarGroove:
        {
        Qt::Orientation orient = Qt::Horizontal;
        if (const QStyleOptionProgressBar *pb = qstyleoption_cast<const QStyleOptionProgressBar *>(option))
            orient = pb->state & QStyle::State_Horizontal ? Qt::Horizontal : Qt::Vertical;
        partId = (orient == Qt::Horizontal) ? PP_BAR : PP_BARVERT;
        themeNumber = QWindowsXPStylePrivate::ProgressTheme;
        stateId = 1;
        }
        break;

    case CE_MenuEmptyArea:
    case CE_MenuItem:
        if (const QStyleOptionMenuItem *menuitem = qstyleoption_cast<const QStyleOptionMenuItem *>(option))
        {
            int tab = menuitem->tabWidth;
            bool dis = !(menuitem->state & State_Enabled);
            bool act = menuitem->state & State_Selected;
            bool checkable = menuitem->menuHasCheckableItems;
            bool checked = checkable ? menuitem->checked : false;

            // windows always has a check column, regardless whether we have an icon or not
            int checkcol = qMax(menuitem->maxIconWidth, 12);

            int x, y, w, h;
            rect.getRect(&x, &y, &w, &h);

            QBrush fill = menuitem->palette.brush(act ? QPalette::Highlight : QPalette::Button);
            p->fillRect(rect, fill);

            if (element == CE_MenuEmptyArea)
                break;

            // draw separator -------------------------------------------------
            if (menuitem->menuItemType == QStyleOptionMenuItem::Separator) {
                int yoff = y-1 + h / 2;
                p->setPen(menuitem->palette.dark().color());
                p->drawLine(x, yoff, x+w, yoff);
                ++yoff;
                p->setPen(menuitem->palette.light().color());
                p->drawLine(x, yoff, x+w, yoff);
                return;
            }

            int xpos = x;

            // draw icon ------------------------------------------------------
            if (!menuitem->icon.isNull()) {
                QIcon::Mode mode = dis ? QIcon::Disabled : QIcon::Normal;
                if (act && !dis)
                    mode = QIcon::Active;
                QPixmap pixmap = checked ?
                                 menuitem->icon.pixmap(proxy()->pixelMetric(PM_SmallIconSize, option), mode, QIcon::On) :
                                 menuitem->icon.pixmap(proxy()->pixelMetric(PM_SmallIconSize, option), mode);
                const int pixw = pixmap.width() / pixmap.devicePixelRatio();
                const int pixh = pixmap.height() / pixmap.devicePixelRatio();
                QRect iconRect(0, 0, pixw, pixh);
                iconRect.moveCenter(QRect(xpos, y, checkcol, h).center());
                QRect vIconRect = visualRect(option->direction, option->rect, iconRect);
                p->setPen(menuitem->palette.text().color());
                p->setBrush(Qt::NoBrush);
                if (checked)
                    p->drawRect(vIconRect.adjusted(-1, -1, 0, 0));
                p->drawPixmap(vIconRect.topLeft(), pixmap);

            // draw checkmark -------------------------------------------------
            } else if (checked) {
                QStyleOptionMenuItem newMi = *menuitem;
                newMi.state = State_None;
                if (!dis)
                    newMi.state |= State_Enabled;
                if (act)
                    newMi.state |= State_On;

                QRect checkMarkRect = QRect(menuitem->rect.x() + windowsItemFrame,
                                            menuitem->rect.y() + windowsItemFrame,
                                            checkcol - 2 * windowsItemFrame,
                                            menuitem->rect.height() - 2*windowsItemFrame);
                newMi.rect = visualRect(option->direction, option->rect, checkMarkRect);
                proxy()->drawPrimitive(PE_IndicatorMenuCheckMark, &newMi, p);
            }

            QColor textColor = dis ? menuitem->palette.text().color() :
                               act ? menuitem->palette.highlightedText().color() : menuitem->palette.buttonText().color();
            p->setPen(textColor);

            // draw text ------------------------------------------------------
            int xm = windowsItemFrame + checkcol + windowsItemHMargin;
            xpos = menuitem->rect.x() + xm;
            QRect textRect(xpos, y + windowsItemVMargin, w - xm - windowsRightBorder - tab + 1, h - 2 * windowsItemVMargin);
            QRect vTextRect = visualRect(option->direction, option->rect, textRect);
            QString s = menuitem->text;
            if (!s.isEmpty()) {
                p->save();
                int t = s.indexOf(QLatin1Char('\t'));
                int text_flags = Qt::AlignVCenter|Qt::TextShowMnemonic | Qt::TextDontClip | Qt::TextSingleLine | Qt::AlignLeft;
                if (!proxy()->styleHint(SH_UnderlineShortcut, menuitem))
                    text_flags |= Qt::TextHideMnemonic;
                // draw tab text ----------------
                if (t >= 0) {
                    QRect vShortcutRect = visualRect(option->direction, option->rect, QRect(textRect.topRight(), menuitem->rect.bottomRight()));
                    if (dis && !act && proxy()->styleHint(SH_EtchDisabledText, option)) {
                        p->setPen(menuitem->palette.light().color());
                        p->drawText(vShortcutRect.adjusted(1,1,1,1), text_flags, s.mid(t + 1));
                        p->setPen(textColor);
                    }
                    p->drawText(vShortcutRect, text_flags, s.mid(t + 1));
                    s = s.left(t);
                }
                QFont font = menuitem->font;
                if (menuitem->menuItemType == QStyleOptionMenuItem::DefaultItem)
                    font.setBold(true);
                p->setFont(font);
                if (dis && !act && proxy()->styleHint(SH_EtchDisabledText, option)) {
                    p->setPen(menuitem->palette.light().color());
                    p->drawText(vTextRect.adjusted(1,1,1,1), text_flags, s.left(t));
                    p->setPen(textColor);
                }
                p->drawText(vTextRect, text_flags, s);
                p->restore();
            }

            // draw sub menu arrow --------------------------------------------
            if (menuitem->menuItemType == QStyleOptionMenuItem::SubMenu) {
                int dim = (h - 2) / 2;
                PrimitiveElement arrow;
                arrow = (option->direction == Qt::RightToLeft) ? PE_IndicatorArrowLeft : PE_IndicatorArrowRight;
                xpos = x + w - windowsArrowHMargin - windowsItemFrame - dim;
                QRect vSubMenuRect = visualRect(option->direction, option->rect, QRect(xpos, y + h / 2 - dim / 2, dim, dim));
                QStyleOptionMenuItem newMI = *menuitem;
                newMI.rect = vSubMenuRect;
                newMI.state = dis ? State_None : State_Enabled;
                if (act)
                    newMI.palette.setColor(QPalette::ButtonText, newMI.palette.highlightedText().color());
                proxy()->drawPrimitive(arrow, &newMI, p);
            }
        }
        return;

    case CE_MenuBarItem:
        if (const QStyleOptionMenuItem *mbi = qstyleoption_cast<const QStyleOptionMenuItem *>(option))
        {
            if (mbi->menuItemType == QStyleOptionMenuItem::DefaultItem)
                break;

            bool act = mbi->state & State_Selected;
            bool dis = !(mbi->state & State_Enabled);

            QBrush fill = mbi->palette.brush(act ? QPalette::Highlight : QPalette::Button);
            QPalette::ColorRole textRole = dis ? QPalette::Text:
                                           act ? QPalette::HighlightedText : QPalette::ButtonText;
            QPixmap pix = mbi->icon.pixmap(proxy()->pixelMetric(PM_SmallIconSize, option), QIcon::Normal);

            uint alignment = Qt::AlignCenter | Qt::TextShowMnemonic | Qt::TextDontClip | Qt::TextSingleLine;
            if (!proxy()->styleHint(SH_UnderlineShortcut, mbi))
                alignment |= Qt::TextHideMnemonic;

            p->fillRect(rect, fill);
            if (!pix.isNull())
                drawItemPixmap(p, mbi->rect, alignment, pix);
            else
                drawItemText(p, mbi->rect, alignment, mbi->palette, mbi->state & State_Enabled, mbi->text, textRole);
        }
        return;
#if 0 && QT_CONFIG(dockwidget)
    case CE_DockWidgetTitle:
        if (const QStyleOptionDockWidget *dwOpt = qstyleoption_cast<const QStyleOptionDockWidget *>(option))
        {
            int buttonMargin = 4;
            int mw = proxy()->pixelMetric(QStyle::PM_DockWidgetTitleMargin, dwOpt);
            int fw = proxy()->pixelMetric(PM_DockWidgetFrameWidth, dwOpt);
            bool isFloating = false; // widget && widget->isWindow();
            bool isActive = dwOpt->state & State_Active;

            const bool verticalTitleBar = dwOpt->verticalTitleBar;

            if (verticalTitleBar) {
                rect = rect.transposed();

                p->translate(rect.left() - 1, rect.top() + rect.width());
                p->rotate(-90);
                p->translate(-rect.left() + 1, -rect.top());
            }
            QRect r = rect.adjusted(0, 2, -1, -3);
            QRect titleRect = r;

            if (dwOpt->closable) {
                QSize sz = proxy()->standardIcon(QStyle::SP_TitleBarCloseButton, dwOpt).actualSize(QSize(10, 10));
                titleRect.adjust(0, 0, -sz.width() - mw - buttonMargin, 0);
            }

            if (dwOpt->floatable) {
                QSize sz = proxy()->standardIcon(QStyle::SP_TitleBarMaxButton, dwOpt).actualSize(QSize(10, 10));
                titleRect.adjust(0, 0, -sz.width() - mw - buttonMargin, 0);
            }

            if (isFloating) {
                titleRect.adjust(0, -fw, 0, 0);
                if (option->window && option->window->icon().cacheKey() != QApplication::windowIcon().cacheKey())
                    titleRect.adjust(titleRect.height() + mw, 0, 0, 0);
            } else {
                titleRect.adjust(mw, 0, 0, 0);
                if (!dwOpt->floatable && !dwOpt->closable)
                    titleRect.adjust(0, 0, -mw, 0);
            }

            if (!verticalTitleBar)
                titleRect = visualRect(dwOpt->direction, r, titleRect);

            if (!isFloating) {
                QPen oldPen = p->pen();
                QString titleText = p->fontMetrics().elidedText(dwOpt->title, Qt::ElideRight, titleRect.width());
                p->setPen(dwOpt->palette.color(QPalette::Dark));
                p->drawRect(r);

                if (!titleText.isEmpty()) {
                    drawItemText(p, titleRect,
                                Qt::AlignLeft | Qt::AlignVCenter | Qt::TextShowMnemonic, dwOpt->palette,
                                dwOpt->state & State_Enabled, titleText,
                                QPalette::WindowText);
                }

                p->setPen(oldPen);
            } else {
                themeNumber = QWindowsXPStylePrivate::WindowTheme;
                if (isActive)
                    stateId = CS_ACTIVE;
                else
                    stateId = CS_INACTIVE;

                int titleHeight = rect.height() - 2;
                rect = rect.adjusted(-fw, -fw, fw, 0);

                XPThemeData theme(option->window, p, themeNumber, 0, stateId);
                if (!theme.isValid())
                    break;

                // Draw small type title bar
                theme.rect = rect;
                theme.partId = WP_SMALLCAPTION;
                d->drawBackground(theme);

                // Figure out maximal button space on title bar

                QIcon ico = option->window->icon();
                bool hasIcon = (ico.cacheKey() != QApplication::windowIcon().cacheKey());
                if (hasIcon) {
                    QPixmap pxIco = ico.pixmap(titleHeight);
                    if (!verticalTitleBar && dwOpt->direction == Qt::RightToLeft)
                        p->drawPixmap(rect.width() - titleHeight - pxIco.width(), rect.bottom() - titleHeight - 2, pxIco);
                    else
                        p->drawPixmap(fw, rect.bottom() - titleHeight - 2, pxIco);
                }
                if (!dwOpt->title.isEmpty()) {
                    QPen oldPen = p->pen();
                    QFont oldFont = p->font();
                    QFont titleFont = oldFont;
                    titleFont.setBold(true);
                    p->setFont(titleFont);
                    QString titleText
                        = p->fontMetrics().elidedText(dwOpt->title, Qt::ElideRight, titleRect.width());

                    int result = TST_NONE;
                    GetThemeEnumValue(theme.handle(), WP_SMALLCAPTION, isActive ? CS_ACTIVE : CS_INACTIVE, TMT_TEXTSHADOWTYPE, &result);
                    if (result != TST_NONE) {
                        COLORREF textShadowRef;
                        GetThemeColor(theme.handle(), WP_SMALLCAPTION, isActive ? CS_ACTIVE : CS_INACTIVE, TMT_TEXTSHADOWCOLOR, &textShadowRef);
                        QColor textShadow = qRgb(GetRValue(textShadowRef), GetGValue(textShadowRef), GetBValue(textShadowRef));
                        p->setPen(textShadow);
                        drawItemText(p, titleRect.adjusted(1, 1, 1, 1),
                                    Qt::AlignLeft | Qt::AlignBottom, dwOpt->palette,
                                    dwOpt->state & State_Enabled, titleText);
                    }

                    COLORREF captionText = GetSysColor(isActive ? COLOR_CAPTIONTEXT : COLOR_INACTIVECAPTIONTEXT);
                    QColor textColor = qRgb(GetRValue(captionText), GetGValue(captionText), GetBValue(captionText));
                    p->setPen(textColor);
                    drawItemText(p, titleRect,
                                Qt::AlignLeft | Qt::AlignBottom, dwOpt->palette,
                                dwOpt->state & State_Enabled, titleText);
                    p->setFont(oldFont);
                    p->setPen(oldPen);
                }

            }

            return;
        }
        break;
#endif // QT_CONFIG(dockwidget)
#if 0 && QT_CONFIG(rubberband)
    case CE_RubberBand:
        if (qstyleoption_cast<const QStyleOptionRubberBand *>(option)) {
            QColor highlight = option->palette.color(QPalette::Active, QPalette::Highlight).toRgb();
            p->save();
            p->setPen(highlight.darker(120));
            QColor dimHighlight(qMin(highlight.red()/2 + 110, 255),
                                qMin(highlight.green()/2 + 110, 255),
                                qMin(highlight.blue()/2 + 110, 255),
                                127);
                                //(widget && widget->isTopLevel())? 255 : 127);
            p->setBrush(dimHighlight);
            p->drawRect(option->rect.adjusted(0, 0, -1, -1));
            p->restore();
            return;
        }
        break;
#endif // QT_CONFIG(rubberband)
    case CE_HeaderEmptyArea:
        if (option->state & State_Horizontal)
        {
            themeNumber = QWindowsXPStylePrivate::HeaderTheme;
            stateId = HIS_NORMAL;
        }
        else {
            QWindowsStyle::drawControl(CE_HeaderEmptyArea, option, p);
            return;
        }
        break;
    default:
        break;
    }

    XPThemeData theme(option->window, p, themeNumber, partId, stateId, rect);
    if (!theme.isValid()) {
        QWindowsStyle::drawControl(element, option, p);
        return;
    }

    theme.rotate = rotate;
    theme.mirrorHorizontally = hMirrored;
    theme.mirrorVertically = vMirrored;
    d->drawBackground(theme);
}

QRect QWindowsXPStylePrivate::scrollBarGripperBounds(QStyle::State flags, XPThemeData *theme)
{
    const bool horizontal = flags & QStyle::State_Horizontal;
    const qreal factor = QWindowsStylePrivate::nativeMetricScaleFactor(theme->window);
    const QMargins contentsMargin =
        (theme->margins(theme->rect, TMT_SIZINGMARGINS) * factor).toMargins();
    theme->partId = horizontal ? SBP_GRIPPERHORZ : SBP_GRIPPERVERT;
    const QSize size = (theme->size() * factor).toSize();

    const int hSpace = theme->rect.width() - size.width();
    const int vSpace = theme->rect.height() - size.height();
    const bool sufficientSpace = (horizontal && hSpace > (contentsMargin.left() + contentsMargin.right()))
        || vSpace > contentsMargin.top() + contentsMargin.bottom();
    return sufficientSpace ? QRect(theme->rect.topLeft() + QPoint(hSpace, vSpace) / 2, size) : QRect();
}

#if 0 && QT_CONFIG(mdiarea)
// Helper for drawing MDI buttons into the corner widget of QMenuBar in case a
// QMdiSubWindow is maximized.
static void populateMdiButtonTheme(const QStyle *proxy,
                                   const QStyleOptionComplex *option,
                                   QStyle::SubControl subControl, int part,
                                   XPThemeData *theme)
{
        theme->partId = part;
        theme->rect = proxy->subControlRect(QStyle::CC_MdiControls, option, subControl);
        if (!option->state.testFlag(QStyle::State_Enabled))
            theme->stateId = CBS_INACTIVE;
        else if (option->state.testFlag(QStyle::State_Sunken) && option->activeSubControls.testFlag(subControl))
            theme->stateId = CBS_PUSHED;
        else if (option->state.testFlag(QStyle::State_MouseOver) && option->activeSubControls.testFlag(subControl))
            theme->stateId = CBS_HOT;
        else
            theme->stateId = CBS_NORMAL;
}

// Calculate an small (max 2), empirical correction factor for scaling up
// WP_MDICLOSEBUTTON, WP_MDIRESTOREBUTTON, WP_MDIMINBUTTON, which are too
// small on High DPI screens (QTBUG-75927).
qreal mdiButtonCorrectionFactor(XPThemeData &theme, const QPaintDevice *pd = nullptr)
{
    const auto dpr = pd ? pd->devicePixelRatioF() : qApp->devicePixelRatio();
    const QSizeF nativeSize = QSizeF(theme.size()) / dpr;
    const QSizeF requestedSize(theme.rect.size());
    const auto rawFactor = qMin(requestedSize.width() / nativeSize.width(),
                                requestedSize.height() / nativeSize.height());
    const auto factor = rawFactor >= qreal(2) ? qreal(2) : qreal(1);
    return factor;
}
#endif // QT_CONFIG(mdiarea)

static void populateTitleBarButtonTheme(const QStyle *proxy,
                                        const QStyleOptionComplex *option,
                                        QStyle::SubControl subControl,
                                        bool isTitleBarActive, int part,
                                        XPThemeData *theme)
{
    theme->rect = proxy->subControlRect(QStyle::CC_TitleBar, option, subControl);
    theme->partId = part;
    if (!(option->state & QStyle::State_Enabled))
        theme->stateId = RBS_DISABLED;
    else if (option->activeSubControls == subControl && option->state.testFlag(QStyle::State_Sunken))
        theme->stateId = RBS_PUSHED;
    else if (option->activeSubControls == subControl && option->state.testFlag(QStyle::State_MouseOver))
        theme->stateId = RBS_HOT;
    else if (!isTitleBarActive)
        theme->stateId = RBS_INACTIVE;
    else
        theme->stateId = RBS_NORMAL;
}

/*!
    \reimp
*/
void QWindowsXPStyle::drawComplexControl(ComplexControl cc, const QStyleOptionComplex *option,
                                         QPainter *p) const
{
    QWindowsXPStylePrivate *d = const_cast<QWindowsXPStylePrivate*>(d_func());

    if (!QWindowsXPStylePrivate::useXP()) {
        QWindowsStyle::drawComplexControl(cc, option, p);
        return;
    }

    State flags = option->state;
    SubControls sub = option->subControls;
    QRect r = option->rect;

    int partId = 0;
    int stateId = 0;
    if (option->window && option->window->isActive())
        flags |= State_MouseOver;

    switch (cc) {
//#if QT_CONFIG(spinbox)
    case CC_SpinBox:
        if (const QStyleOptionSpinBox *sb = qstyleoption_cast<const QStyleOptionSpinBox *>(option))
        {
            XPThemeData theme(option->window, p, QWindowsXPStylePrivate::SpinTheme);

            if (sb->frame && (sub & SC_SpinBoxFrame)) {
                partId = EP_EDITTEXT;
                if (!(flags & State_Enabled))
                    stateId = ETS_DISABLED;
                else if (flags & State_HasFocus)
                    stateId = ETS_FOCUSED;
                else
                    stateId = ETS_NORMAL;

                XPThemeData ftheme(option->window, p, QWindowsXPStylePrivate::EditTheme,
                                   partId, stateId, r);
                ftheme.noContent = true;
                d->drawBackground(ftheme);
            }
            if (sub & SC_SpinBoxUp) {
                theme.rect = proxy()->subControlRect(CC_SpinBox, option, SC_SpinBoxUp);
                partId = SPNP_UP;
                if (!(sb->stepEnabled & QStyleOptionSpinBox::StepUpEnabled) || !(flags & State_Enabled))
                    stateId = UPS_DISABLED;
                else if (sb->activeSubControls == SC_SpinBoxUp && (sb->state & State_Sunken))
                    stateId = UPS_PRESSED;
                else if (sb->activeSubControls == SC_SpinBoxUp && (sb->state & State_MouseOver))
                    stateId = UPS_HOT;
                else
                    stateId = UPS_NORMAL;
                theme.partId = partId;
                theme.stateId = stateId;
                d->drawBackground(theme);
            }
            if (sub & SC_SpinBoxDown) {
                theme.rect = proxy()->subControlRect(CC_SpinBox, option, SC_SpinBoxDown);
                partId = SPNP_DOWN;
                if (!(sb->stepEnabled & QStyleOptionSpinBox::StepDownEnabled) || !(flags & State_Enabled))
                    stateId = DNS_DISABLED;
                else if (sb->activeSubControls == SC_SpinBoxDown && (sb->state & State_Sunken))
                    stateId = DNS_PRESSED;
                else if (sb->activeSubControls == SC_SpinBoxDown && (sb->state & State_MouseOver))
                    stateId = DNS_HOT;
                else
                    stateId = DNS_NORMAL;
                theme.partId = partId;
                theme.stateId = stateId;
                d->drawBackground(theme);
            }
        }
        break;
//#endif // QT_CONFIG(spinbox)
//#if QT_CONFIG(searchfield)
    case CC_SearchField:
        if (const QStyleOptionSearchField *sf = qstyleoption_cast<const QStyleOptionSearchField *>(option))
        {
            if (sf->frame && (sub & SC_SearchFieldFrame)) {
                partId = EP_EDITBORDER_NOSCROLL;
                if (!(flags & State_Enabled))
                    stateId = ETS_DISABLED;
                else if (flags & State_MouseOver)
                    stateId = ETS_HOT;
                else if (flags & State_HasFocus)
                    stateId = ETS_FOCUSED;
                else
                    stateId = ETS_NORMAL;

                XPThemeData theme(option->window, p,
                                  QWindowsXPStylePrivate::EditTheme,
                                  partId, stateId, r);

                d->drawBackground(theme);
            }
        }
        break;
//#endif QT_CONFIG(searchfield)
//#if QT_CONFIG(combobox)
    case CC_ComboBox:
        if (const QStyleOptionComboBox *cmb = qstyleoption_cast<const QStyleOptionComboBox *>(option))
        {
            if (cmb->editable) {
                if (sub & SC_ComboBoxEditField) {
                    partId = EP_EDITBORDER_NOSCROLL;
                    if (!(flags & State_Enabled))
                        stateId = ETS_DISABLED;
                    else if (flags & State_MouseOver)
                        stateId = ETS_HOT;
                    else if (flags & State_HasFocus)
                        stateId = ETS_FOCUSED;
                    else
                        stateId = ETS_NORMAL;

                    XPThemeData theme(option->window, p,
                                      QWindowsXPStylePrivate::EditTheme,
                                      partId, stateId, r);

                    d->drawBackground(theme);
                }
                if (sub & SC_ComboBoxArrow) {
                    QRect subRect = proxy()->subControlRect(CC_ComboBox, option, SC_ComboBoxArrow);
                    XPThemeData theme(option->window, p, QWindowsXPStylePrivate::ComboboxTheme);
                    theme.rect = subRect;
                    partId = option->direction == Qt::RightToLeft ? CP_DROPDOWNBUTTONLEFT : CP_DROPDOWNBUTTONRIGHT;

                    if (!(cmb->state & State_Enabled))
                        stateId = CBXS_DISABLED;
                    else if (cmb->state & State_Sunken || cmb->state & State_On)
                        stateId = CBXS_PRESSED;
                    else if (cmb->state & State_MouseOver && option->activeSubControls & SC_ComboBoxArrow)
                        stateId = CBXS_HOT;
                    else
                        stateId = CBXS_NORMAL;

                    theme.partId = partId;
                    theme.stateId = stateId;
                    d->drawBackground(theme);
                }

            } else {
                if (sub & SC_ComboBoxFrame) {
                    XPThemeData theme(option->window, p, QWindowsXPStylePrivate::ComboboxTheme);
                    theme.rect = option->rect;
                    theme.partId = CP_READONLY;
                    if (!(cmb->state & State_Enabled))
                        theme.stateId = CBXS_DISABLED;
                    else if (cmb->state & State_Sunken || cmb->state & State_On)
                        theme.stateId = CBXS_PRESSED;
                    else if (cmb->state & State_MouseOver)
                        theme.stateId = CBXS_HOT;
                    else
                        theme.stateId = CBXS_NORMAL;
                    d->drawBackground(theme);
                }
                if (sub & SC_ComboBoxArrow) {
                    XPThemeData theme(option->window, p, QWindowsXPStylePrivate::ComboboxTheme);
                    theme.rect = proxy()->subControlRect(CC_ComboBox, option, SC_ComboBoxArrow);
                    theme.partId = option->direction == Qt::RightToLeft ? CP_DROPDOWNBUTTONLEFT : CP_DROPDOWNBUTTONRIGHT;
                    if (!(cmb->state & State_Enabled))
                        theme.stateId = CBXS_DISABLED;
                    else
                        theme.stateId = CBXS_NORMAL;
                    d->drawBackground(theme);
                }
                if ((sub & SC_ComboBoxEditField) && (flags & State_HasFocus)) {
                    QStyleOptionFocusRect fropt;
                    fropt.QStyleOption::operator=(*cmb);
                    fropt.rect = proxy()->subControlRect(CC_ComboBox, option, SC_ComboBoxEditField);
                    proxy()->drawPrimitive(PE_FrameFocusRect, &fropt, p);
                }
            }
        }
        break;
//#endif // QT_CONFIG(combobox)
    case CC_ScrollBar:
        if (const QStyleOptionSlider *scrollbar = qstyleoption_cast<const QStyleOptionSlider *>(option))
        {
            XPThemeData theme(option->window, p, QWindowsXPStylePrivate::ScrollBarTheme);
            bool maxedOut = (scrollbar->maximum == scrollbar->minimum);
            if (maxedOut)
                flags &= ~State_Enabled;

            bool isHorz = flags & State_Horizontal;
            bool isRTL  = option->direction == Qt::RightToLeft;
            if (sub & SC_ScrollBarAddLine) {
                theme.rect = proxy()->subControlRect(CC_ScrollBar, option, SC_ScrollBarAddLine);
                partId = SBP_ARROWBTN;
                if (!(flags & State_Enabled))
                    stateId = (isHorz ? (isRTL ? ABS_LEFTDISABLED : ABS_RIGHTDISABLED) : ABS_DOWNDISABLED);
                else if (scrollbar->activeSubControls & SC_ScrollBarAddLine && (scrollbar->state & State_Sunken))
                    stateId = (isHorz ? (isRTL ? ABS_LEFTPRESSED : ABS_RIGHTPRESSED) : ABS_DOWNPRESSED);
                else if (scrollbar->activeSubControls & SC_ScrollBarAddLine && (scrollbar->state & State_MouseOver))
                    stateId = (isHorz ? (isRTL ? ABS_LEFTHOT : ABS_RIGHTHOT) : ABS_DOWNHOT);
                else
                    stateId = (isHorz ? (isRTL ? ABS_LEFTNORMAL : ABS_RIGHTNORMAL) : ABS_DOWNNORMAL);
                theme.partId = partId;
                theme.stateId = stateId;
                d->drawBackground(theme);
            }
            if (sub & SC_ScrollBarSubLine) {
                theme.rect = proxy()->subControlRect(CC_ScrollBar, option, SC_ScrollBarSubLine);
                partId = SBP_ARROWBTN;
                if (!(flags & State_Enabled))
                    stateId = (isHorz ? (isRTL ? ABS_RIGHTDISABLED : ABS_LEFTDISABLED) : ABS_UPDISABLED);
                else if (scrollbar->activeSubControls & SC_ScrollBarSubLine && (scrollbar->state & State_Sunken))
                    stateId = (isHorz ? (isRTL ? ABS_RIGHTPRESSED : ABS_LEFTPRESSED) : ABS_UPPRESSED);
                else if (scrollbar->activeSubControls & SC_ScrollBarSubLine && (scrollbar->state & State_MouseOver))
                    stateId = (isHorz ? (isRTL ? ABS_RIGHTHOT : ABS_LEFTHOT) : ABS_UPHOT);
                else
                    stateId = (isHorz ? (isRTL ? ABS_RIGHTNORMAL : ABS_LEFTNORMAL) : ABS_UPNORMAL);
                theme.partId = partId;
                theme.stateId = stateId;
                d->drawBackground(theme);
            }
            if (maxedOut) {
                if (sub & SC_ScrollBarSlider) {
                    theme.rect = proxy()->subControlRect(CC_ScrollBar, option, SC_ScrollBarSlider);
                    theme.rect = theme.rect.united(proxy()->subControlRect(CC_ScrollBar, option, SC_ScrollBarSubPage));
                    theme.rect = theme.rect.united(proxy()->subControlRect(CC_ScrollBar, option, SC_ScrollBarAddPage));
                    partId = scrollbar->orientation == Qt::Horizontal ? SBP_LOWERTRACKHORZ : SBP_LOWERTRACKVERT;
                    stateId = SCRBS_DISABLED;
                    theme.partId = partId;
                    theme.stateId = stateId;
                    d->drawBackground(theme);
                }
            } else {
                if (sub & SC_ScrollBarSubPage) {
                    theme.rect = proxy()->subControlRect(CC_ScrollBar, option, SC_ScrollBarSubPage);
                    partId = flags & State_Horizontal ? SBP_UPPERTRACKHORZ : SBP_UPPERTRACKVERT;
                    if (!(flags & State_Enabled))
                        stateId = SCRBS_DISABLED;
                    else if (scrollbar->activeSubControls & SC_ScrollBarSubPage && (scrollbar->state & State_Sunken))
                        stateId = SCRBS_PRESSED;
                    else if (scrollbar->activeSubControls & SC_ScrollBarSubPage && (scrollbar->state & State_MouseOver))
                        stateId = SCRBS_HOT;
                    else
                        stateId = SCRBS_NORMAL;
                    theme.partId = partId;
                    theme.stateId = stateId;
                    d->drawBackground(theme);
                }
                if (sub & SC_ScrollBarAddPage) {
                    theme.rect = proxy()->subControlRect(CC_ScrollBar, option, SC_ScrollBarAddPage);
                    partId = flags & State_Horizontal ? SBP_LOWERTRACKHORZ : SBP_LOWERTRACKVERT;
                    if (!(flags & State_Enabled))
                        stateId = SCRBS_DISABLED;
                    else if (scrollbar->activeSubControls & SC_ScrollBarAddPage && (scrollbar->state & State_Sunken))
                        stateId = SCRBS_PRESSED;
                    else if (scrollbar->activeSubControls & SC_ScrollBarAddPage && (scrollbar->state & State_MouseOver))
                        stateId = SCRBS_HOT;
                    else
                        stateId = SCRBS_NORMAL;
                    theme.partId = partId;
                    theme.stateId = stateId;
                    d->drawBackground(theme);
                }
                if (sub & SC_ScrollBarSlider) {
                    // The style paint the slider handle so that it is surrounded by transparent areas
                    // on each side. These areas have the same size as the Left/Right (or Top/Left) buttons.
                    // This is probaly done in order for the handle to travel all along the geometry
                    // of the slider, while the handle still not occluding the buttons.
                    // We do not want those transparent areas, so we clip them off here.
                    const int extentForButton = proxy()->pixelMetric(PM_ScrollBarExtent, scrollbar);
                    QSize extend(extentForButton, 0);
                    if (scrollbar->orientation == Qt::Vertical)
                        extend.transpose();

                    QRect rect = r;                                     // 'r' is the rect for the scrollbar handle
                    rect.setSize(rect.size() + 2 * extend);             // 'rect' is the rect for the whole scrollbar
                    p->setClipRect(r);                                  // clip off button areas
                    p->translate(-extend.width(), -extend.height());    // translate left button area away

                    theme.rect = rect;
                    if (!(flags & State_Enabled))
                        stateId = SCRBS_DISABLED;
                    else if (scrollbar->activeSubControls & SC_ScrollBarSlider && (scrollbar->state & State_Sunken))
                        stateId = SCRBS_PRESSED;
                    else if (scrollbar->activeSubControls & SC_ScrollBarSlider && (scrollbar->state & State_MouseOver))
                        stateId = SCRBS_HOT;
                    else
                        stateId = SCRBS_NORMAL;

                    // Draw handle
                    theme.partId = flags & State_Horizontal ? SBP_THUMBBTNHORZ : SBP_THUMBBTNVERT;
                    theme.stateId = stateId;
                    d->drawBackground(theme);

                    const QRect gripperBounds = QWindowsXPStylePrivate::scrollBarGripperBounds(flags, &theme);
                    // Draw gripper if there is enough space
                    if (!gripperBounds.isEmpty()) {
                        p->save();
                        theme.rect = gripperBounds;
                        p->setClipRegion(d->region(theme));// Only change inside the region of the gripper
                        d->drawBackground(theme);          // Transparent gripper ontop of background
                        p->restore();
                    }
                }
            }
        }
        break;

//#if QT_CONFIG(slider)
    case CC_Slider:
        if (const QStyleOptionSlider *slider = qstyleoption_cast<const QStyleOptionSlider *>(option))
        {
            XPThemeData theme(option->window, p, QWindowsXPStylePrivate::TrackBarTheme);
            QRect slrect = slider->rect;
            QRegion tickreg = slrect;
            if (sub & SC_SliderGroove) {
                theme.rect = proxy()->subControlRect(CC_Slider, option, SC_SliderGroove);
                if (slider->orientation == Qt::Horizontal) {
                    partId = TKP_TRACK;
                    stateId = TRS_NORMAL;
                    theme.rect = QRect(slrect.left(), theme.rect.center().y() - 2, slrect.width(), 4);
                } else {
                    partId = TKP_TRACKVERT;
                    stateId = TRVS_NORMAL;
                    theme.rect = QRect(theme.rect.center().x() - 2, slrect.top(), 4, slrect.height());
                }
                theme.partId = partId;
                theme.stateId = stateId;
                d->drawBackground(theme);
                tickreg -= theme.rect;
            }
            if (sub & SC_SliderTickmarks) {
                int tickOffset = proxy()->pixelMetric(PM_SliderTickmarkOffset, slider);
                int ticks = slider->tickPosition;
                int thickness = proxy()->pixelMetric(PM_SliderControlThickness, slider);
                int len = proxy()->pixelMetric(PM_SliderLength, slider);
                int available = proxy()->pixelMetric(PM_SliderSpaceAvailable, slider);
                int interval = slider->tickInterval;
                if (interval <= 0) {
                    interval = slider->singleStep;
                    if (QStyle::sliderPositionFromValue(slider->minimum, slider->maximum, interval,
                                                        available)
                        - QStyle::sliderPositionFromValue(slider->minimum, slider->maximum,
                                                          0, available) < 3)
                        interval = slider->pageStep;
                }
                if (!interval)
                    interval = 1;
                int fudge = len / 2;
                int pos;
                int bothOffset = (ticks & QStyleOptionSlider::TicksAbove && ticks & QStyleOptionSlider::TicksBelow) ? 1 : 0;
                p->setPen(d->sliderTickColor);
                QVarLengthArray<QLine, 32> lines;
                int v = slider->minimum;
                while (v <= slider->maximum + 1) {
                    if (v == slider->maximum + 1 && interval == 1)
                        break;
                    const int v_ = qMin(v, slider->maximum);
                    int tickLength = (v_ == slider->minimum || v_ >= slider->maximum) ? 4 : 3;
                    pos = QStyle::sliderPositionFromValue(slider->minimum, slider->maximum,
                                                          v_, available) + fudge;
                    if (slider->orientation == Qt::Horizontal) {
                        if (ticks & QStyleOptionSlider::TicksAbove)
                            lines.append(QLine(pos, tickOffset - 1 - bothOffset,
                                               pos, tickOffset - 1 - bothOffset - tickLength));

                        if (ticks & QStyleOptionSlider::TicksBelow)
                            lines.append(QLine(pos, tickOffset + thickness + bothOffset,
                                               pos, tickOffset + thickness + bothOffset + tickLength));
                    } else {
                        if (ticks & QStyleOptionSlider::TicksAbove)
                            lines.append(QLine(tickOffset - 1 - bothOffset, pos,
                                               tickOffset - 1 - bothOffset - tickLength, pos));

                        if (ticks & QStyleOptionSlider::TicksBelow)
                            lines.append(QLine(tickOffset + thickness + bothOffset, pos,
                                               tickOffset + thickness + bothOffset + tickLength, pos));
                    }
                    // in the case where maximum is max int
                    int nextInterval = v + interval;
                    if (nextInterval < v)
                        break;
                    v = nextInterval;
                }
                if (!lines.isEmpty()) {
                    p->save();
                    p->translate(slrect.topLeft());
                    p->drawLines(lines.constData(), lines.size());
                    p->restore();
                }
            }
            if (sub & SC_SliderHandle) {
                theme.rect = proxy()->subControlRect(CC_Slider, option, SC_SliderHandle);
                if (slider->orientation == Qt::Horizontal) {
                    if (slider->tickPosition == QStyleOptionSlider::TicksAbove)
                        partId = TKP_THUMBTOP;
                    else if (slider->tickPosition == QStyleOptionSlider::TicksBelow)
                        partId = TKP_THUMBBOTTOM;
                    else
                        partId = TKP_THUMB;

                    if (!(slider->state & State_Enabled))
                        stateId = TUS_DISABLED;
                    else if (slider->activeSubControls & SC_SliderHandle && (slider->state & State_Sunken))
                        stateId = TUS_PRESSED;
                    else if (slider->activeSubControls & SC_SliderHandle && (slider->state & State_MouseOver))
                        stateId = TUS_HOT;
                    else if (flags & State_HasFocus)
                        stateId = TUS_FOCUSED;
                    else
                        stateId = TUS_NORMAL;
                } else {
                    if (slider->tickPosition == QStyleOptionSlider::TicksLeft)
                        partId = TKP_THUMBLEFT;
                    else if (slider->tickPosition == QStyleOptionSlider::TicksRight)
                        partId = TKP_THUMBRIGHT;
                    else
                        partId = TKP_THUMBVERT;

                    if (!(slider->state & State_Enabled))
                        stateId = TUVS_DISABLED;
                    else if (slider->activeSubControls & SC_SliderHandle && (slider->state & State_Sunken))
                        stateId = TUVS_PRESSED;
                    else if (slider->activeSubControls & SC_SliderHandle && (slider->state & State_MouseOver))
                        stateId = TUVS_HOT;
                    else if (flags & State_HasFocus)
                        stateId = TUVS_FOCUSED;
                    else
                        stateId = TUVS_NORMAL;
                }
                theme.partId = partId;
                theme.stateId = stateId;
                d->drawBackground(theme);
            }
            if (sub & SC_SliderGroove && slider->state & State_HasFocus) {
                QStyleOptionFocusRect fropt;
                fropt.QStyleOption::operator=(*slider);
                fropt.rect = subElementRect(SE_SliderFocusRect, slider);
                proxy()->drawPrimitive(PE_FrameFocusRect, &fropt, p);
            }
        }
        break;
//#endif
#if 0 && QT_CONFIG(toolbutton)
    case CC_ToolButton:
        if (const QStyleOptionToolButton *toolbutton
            = qstyleoption_cast<const QStyleOptionToolButton *>(option)) {
            QRect button, menuarea;
            button = proxy()->subControlRect(cc, toolbutton, SC_ToolButton);
            menuarea = proxy()->subControlRect(cc, toolbutton, SC_ToolButtonMenu);

            State bflags = toolbutton->state & ~State_Sunken;
            State mflags = bflags;
            bool autoRaise = flags & State_AutoRaise;
            if (autoRaise) {
                if (!(bflags & State_MouseOver) || !(bflags & State_Enabled)) {
                    bflags &= ~State_Raised;
                }
            }

            if (toolbutton->state & State_Sunken) {
                if (toolbutton->activeSubControls & SC_ToolButton) {
                    bflags |= State_Sunken;
                    mflags |= State_MouseOver | State_Sunken;
                } else if (toolbutton->activeSubControls & SC_ToolButtonMenu) {
                    mflags |= State_Sunken;
                    bflags |= State_MouseOver;
                }
            }

            QStyleOption tool = *toolbutton;
            if (toolbutton->subControls & SC_ToolButton) {
                if (flags & (State_Sunken | State_On | State_Raised) || !autoRaise) {
                    if (toolbutton->features & QStyleOptionToolButton::MenuButtonPopup && autoRaise) {
                        XPThemeData theme(option->window, p, QWindowsXPStylePrivate::ToolBarTheme);
                        theme.partId = TP_SPLITBUTTON;
                        theme.rect = button;
                        if (!(bflags & State_Enabled))
                            stateId = TS_DISABLED;
                        else if (bflags & State_Sunken)
                            stateId = TS_PRESSED;
                        else if (bflags & State_MouseOver || !(flags & State_AutoRaise))
                            stateId = flags & State_On ? TS_HOTCHECKED : TS_HOT;
                        else if (bflags & State_On)
                            stateId = TS_CHECKED;
                        else
                            stateId = TS_NORMAL;
                        if (option->direction == Qt::RightToLeft)
                            theme.mirrorHorizontally = true;
                        theme.stateId = stateId;
                        d->drawBackground(theme);
                    } else {
                        tool.rect = option->rect;
                        tool.state = bflags;
                        if (autoRaise) // for tool bars
                            proxy()->drawPrimitive(PE_PanelButtonTool, &tool, p);
                        else
                            proxy()->drawPrimitive(PE_PanelButtonBevel, &tool, p);
                    }
                }
            }

            if (toolbutton->state & State_HasFocus) {
                QStyleOptionFocusRect fr;
                fr.QStyleOption::operator=(*toolbutton);
                fr.rect.adjust(3, 3, -3, -3);
                if (toolbutton->features & QStyleOptionToolButton::MenuButtonPopup)
                    fr.rect.adjust(0, 0, -proxy()->pixelMetric(QStyle::PM_MenuButtonIndicator,
                                                      toolbutton), 0);
                proxy()->drawPrimitive(PE_FrameFocusRect, &fr, p);
            }
            QStyleOptionToolButton label = *toolbutton;
            label.state = bflags;
            int fw = 2;
            if (!autoRaise)
                label.state &= ~State_Sunken;
            label.rect = button.adjusted(fw, fw, -fw, -fw);
            proxy()->drawControl(CE_ToolButtonLabel, &label, p);

            if (toolbutton->subControls & SC_ToolButtonMenu) {
                tool.rect = menuarea;
                tool.state = mflags;
                if (autoRaise) {
                    proxy()->drawPrimitive(PE_IndicatorButtonDropDown, &tool, p);
                } else {
                    tool.state = mflags;
                    menuarea.adjust(-2, 0, 0, 0);
                    // Draw menu button
                    if ((bflags & State_Sunken) != (mflags & State_Sunken)){
                        p->save();
                        p->setClipRect(menuarea);
                        tool.rect = option->rect;
                        proxy()->drawPrimitive(PE_PanelButtonBevel, &tool, p);
                        p->restore();
                    }
                    // Draw arrow
                    p->save();
                    p->setPen(option->palette.dark().color());
                    p->drawLine(menuarea.left(), menuarea.top() + 3,
                                menuarea.left(), menuarea.bottom() - 3);
                    p->setPen(option->palette.light().color());
                    p->drawLine(menuarea.left() - 1, menuarea.top() + 3,
                                menuarea.left() - 1, menuarea.bottom() - 3);

                    tool.rect = menuarea.adjusted(2, 3, -2, -1);
                    proxy()->drawPrimitive(PE_IndicatorArrowDown, &tool, p);
                    p->restore();
                }
            } else if (toolbutton->features & QStyleOptionToolButton::HasMenu) {
                int mbi = proxy()->pixelMetric(PM_MenuButtonIndicator, toolbutton);
                QRect ir = toolbutton->rect;
                QStyleOptionToolButton newBtn = *toolbutton;
                newBtn.rect = QRect(ir.right() + 4 - mbi, ir.height() - mbi + 4, mbi - 5, mbi - 5);
                proxy()->drawPrimitive(PE_IndicatorArrowDown, &newBtn, p);
            }
        }
        break;
#endif // QT_CONFIG(toolbutton)

    case CC_TitleBar:
        {
            if (const QStyleOptionTitleBar *tb = qstyleoption_cast<const QStyleOptionTitleBar *>(option))
            {
                const qreal factor = QWindowsStylePrivate::nativeMetricScaleFactor(option);
                bool isActive = tb->titleBarState & QStyle::State_Active;
                XPThemeData theme(option->window, p, QWindowsXPStylePrivate::WindowTheme);
                if (sub & SC_TitleBarLabel) {

                        partId = (tb->titleBarState & Qt::WindowMinimized) ? WP_MINCAPTION : WP_CAPTION;
                    theme.rect = option->rect;
                    if (!(option->state & QStyle::State_Enabled))
                        stateId = CS_DISABLED;
                    else if (isActive)
                        stateId = CS_ACTIVE;
                    else
                        stateId = CS_INACTIVE;

                    theme.partId = partId;
                    theme.stateId = stateId;
                    d->drawBackground(theme);

                    QRect ir = proxy()->subControlRect(CC_TitleBar, tb, SC_TitleBarLabel);

                    int result = TST_NONE;
                    GetThemeEnumValue(theme.handle(), WP_CAPTION, isActive ? CS_ACTIVE : CS_INACTIVE, TMT_TEXTSHADOWTYPE, &result);
                    if (result != TST_NONE) {
                        COLORREF textShadowRef;
                        GetThemeColor(theme.handle(), WP_CAPTION, isActive ? CS_ACTIVE : CS_INACTIVE, TMT_TEXTSHADOWCOLOR, &textShadowRef);
                        QColor textShadow = qRgb(GetRValue(textShadowRef), GetGValue(textShadowRef), GetBValue(textShadowRef));
                        p->setPen(textShadow);
                        p->drawText(int(ir.x() + 3 * factor), int(ir.y() + 2 * factor),
                                    int(ir.width() - 1 * factor), ir.height(),
                                    Qt::AlignLeft | Qt::AlignVCenter | Qt::TextSingleLine, tb->text);
                    }
                    COLORREF captionText = GetSysColor(isActive ? COLOR_CAPTIONTEXT : COLOR_INACTIVECAPTIONTEXT);
                    QColor textColor = qRgb(GetRValue(captionText), GetGValue(captionText), GetBValue(captionText));
                    p->setPen(textColor);
                    p->drawText(int(ir.x() + 2 * factor), int(ir.y() + 1 * factor),
                                int(ir.width() - 2 * factor), ir.height(),
                                Qt::AlignLeft | Qt::AlignVCenter | Qt::TextSingleLine, tb->text);
                }
                if (sub & SC_TitleBarSysMenu && tb->titleBarFlags & Qt::WindowSystemMenuHint) {
                    theme.rect = proxy()->subControlRect(CC_TitleBar, option, SC_TitleBarSysMenu);
                    partId = WP_SYSBUTTON;
                    if (!(option->state & QStyle::State_Enabled) || !isActive)
                        stateId = SBS_DISABLED;
                    else if (option->activeSubControls == SC_TitleBarSysMenu && (option->state & State_Sunken))
                        stateId = SBS_PUSHED;
                    else if (option->activeSubControls == SC_TitleBarSysMenu && (option->state & State_MouseOver))
                        stateId = SBS_HOT;
                    else
                        stateId = SBS_NORMAL;
                    if (!tb->icon.isNull()) {
                        tb->icon.paint(p, theme.rect);
                    } else {
                        theme.partId = partId;
                        theme.stateId = stateId;
                        if (theme.size().isEmpty()) {
                            int iconSize = proxy()->pixelMetric(PM_SmallIconSize, tb);
                            QPixmap pm = proxy()->standardIcon(SP_TitleBarMenuButton, tb).pixmap(iconSize, iconSize);
                            p->save();
                            drawItemPixmap(p, theme.rect, Qt::AlignCenter, pm);
                            p->restore();
                        } else {
                            d->drawBackground(theme);
                        }
                    }
                }

                if (sub & SC_TitleBarMinButton && tb->titleBarFlags & Qt::WindowMinimizeButtonHint
                        && !(tb->titleBarState & Qt::WindowMinimized)) {
                    populateTitleBarButtonTheme(proxy(), option, SC_TitleBarMinButton, isActive, WP_MINBUTTON, &theme);
                    d->drawBackground(theme);
                }
                if (sub & SC_TitleBarMaxButton && tb->titleBarFlags & Qt::WindowMaximizeButtonHint
                        && !(tb->titleBarState & Qt::WindowMaximized)) {
                    populateTitleBarButtonTheme(proxy(), option, SC_TitleBarMaxButton, isActive, WP_MAXBUTTON, &theme);
                    d->drawBackground(theme);
                }
                if (sub & SC_TitleBarContextHelpButton
                    && tb->titleBarFlags & Qt::WindowContextHelpButtonHint) {
                    populateTitleBarButtonTheme(proxy(), option, SC_TitleBarContextHelpButton, isActive, WP_HELPBUTTON, &theme);
                    d->drawBackground(theme);
                }
                bool drawNormalButton = (sub & SC_TitleBarNormalButton)
                                        && (((tb->titleBarFlags & Qt::WindowMinimizeButtonHint)
                                        && (tb->titleBarState & Qt::WindowMinimized))
                                        || ((tb->titleBarFlags & Qt::WindowMaximizeButtonHint)
                                        && (tb->titleBarState & Qt::WindowMaximized)));
                if (drawNormalButton) {
                    populateTitleBarButtonTheme(proxy(), option, SC_TitleBarNormalButton, isActive, WP_RESTOREBUTTON, &theme);
                    d->drawBackground(theme);
                }
                if (sub & SC_TitleBarShadeButton && tb->titleBarFlags & Qt::WindowShadeButtonHint
                        && !(tb->titleBarState & Qt::WindowMinimized)) {
                    populateTitleBarButtonTheme(proxy(), option, SC_TitleBarShadeButton, isActive, WP_MINBUTTON, &theme);
                    d->drawBackground(theme);
                }
                if (sub & SC_TitleBarUnshadeButton && tb->titleBarFlags & Qt::WindowShadeButtonHint
                        && tb->titleBarState & Qt::WindowMinimized) {
                    populateTitleBarButtonTheme(proxy(), option, SC_TitleBarUnshadeButton, isActive, WP_RESTOREBUTTON, &theme);
                    d->drawBackground(theme);
                }
                if (sub & SC_TitleBarCloseButton && tb->titleBarFlags & Qt::WindowSystemMenuHint) {
                    populateTitleBarButtonTheme(proxy(), option, SC_TitleBarCloseButton, isActive, WP_CLOSEBUTTON, &theme);
                    d->drawBackground(theme);
                }
            }
        }
        break;

#if 0 && QT_CONFIG(mdiarea)
    case CC_MdiControls:
        {
            XPThemeData theme(option->window, p, QWindowsXPStylePrivate::WindowTheme, WP_MDICLOSEBUTTON, CBS_NORMAL);
            if (Q_UNLIKELY(!theme.isValid()))
                return;

            if (option->subControls.testFlag(SC_MdiCloseButton)) {
                populateMdiButtonTheme(proxy(), option, SC_MdiCloseButton, WP_MDICLOSEBUTTON, &theme);
                d->drawBackground(theme, mdiButtonCorrectionFactor(theme));
            }
            if (option->subControls.testFlag(SC_MdiNormalButton)) {
                populateMdiButtonTheme(proxy(), option, SC_MdiNormalButton, WP_MDIRESTOREBUTTON, &theme);
                d->drawBackground(theme, mdiButtonCorrectionFactor(theme));
            }
            if (option->subControls.testFlag(QStyle::SC_MdiMinButton)) {
                populateMdiButtonTheme(proxy(), option, SC_MdiMinButton, WP_MDIMINBUTTON, &theme);
                d->drawBackground(theme, mdiButtonCorrectionFactor(theme));
            }
        }
        break;
#endif // QT_CONFIG(mdiarea)
#if 0 && QT_CONFIG(dial)
    case CC_Dial:
        if (const QStyleOptionSlider *dial = qstyleoption_cast<const QStyleOptionSlider *>(option))
            QStyleHelper::drawDial(dial, p);
        break;
#endif // QT_CONFIG(dial)
    default:
        QWindowsStyle::drawComplexControl(cc, option, p);
        break;
    }
}

static inline Qt::Orientation progressBarOrientation(const QStyleOption *option = nullptr)
{
    if (const QStyleOptionProgressBar *pb = qstyleoption_cast<const QStyleOptionProgressBar *>(option))
        return pb->state & QStyle::State_Horizontal ? Qt::Horizontal : Qt::Vertical;
    return Qt::Horizontal;
}

int QWindowsXPStylePrivate::pixelMetricFromSystemDp(QStyle::PixelMetric pm, const QStyleOption *option)
{
    switch (pm) {
    case QStyle::PM_IndicatorWidth:
        return XPThemeData::themeSize(option->window, nullptr, QWindowsXPStylePrivate::ButtonTheme, BP_CHECKBOX, CBS_UNCHECKEDNORMAL).width();
    case QStyle::PM_IndicatorHeight:
        return XPThemeData::themeSize(option->window, nullptr, QWindowsXPStylePrivate::ButtonTheme, BP_CHECKBOX, CBS_UNCHECKEDNORMAL).height();
    case QStyle::PM_ExclusiveIndicatorWidth:
        return XPThemeData::themeSize(option->window, nullptr, QWindowsXPStylePrivate::ButtonTheme, BP_RADIOBUTTON, RBS_UNCHECKEDNORMAL).width();
    case QStyle::PM_ExclusiveIndicatorHeight:
        return XPThemeData::themeSize(option->window, nullptr, QWindowsXPStylePrivate::ButtonTheme, BP_RADIOBUTTON, RBS_UNCHECKEDNORMAL).height();
    case QStyle::PM_ProgressBarChunkWidth:
        return progressBarOrientation(option) == Qt::Horizontal
            ? XPThemeData::themeSize(option->window, nullptr, QWindowsXPStylePrivate::ProgressTheme, PP_CHUNK).width()
            : XPThemeData::themeSize(option->window, nullptr, QWindowsXPStylePrivate::ProgressTheme, PP_CHUNKVERT).height();
    case QStyle::PM_SliderThickness:
        return XPThemeData::themeSize(option->window, nullptr, QWindowsXPStylePrivate::TrackBarTheme, TKP_THUMB).height();
    case QStyle::PM_TitleBarHeight:
        return option->window && (option->window->type() == Qt::Tool)
            ? GetSystemMetrics(SM_CYSMCAPTION) + GetSystemMetrics(SM_CXSIZEFRAME)
            : GetSystemMetrics(SM_CYCAPTION) + GetSystemMetrics(SM_CXSIZEFRAME);
    case QStyle::PM_MdiSubWindowFrameWidth:
        return XPThemeData::themeSize(option->window, nullptr, QWindowsXPStylePrivate::WindowTheme, WP_FRAMELEFT, FS_ACTIVE).width();
    case QStyle::PM_DockWidgetFrameWidth:
        return XPThemeData::themeSize(option->window, nullptr, QWindowsXPStylePrivate::WindowTheme, WP_SMALLFRAMERIGHT, FS_ACTIVE).width();
    default:
        break;
    }
    return QWindowsXPStylePrivate::InvalidMetric;
}

/*! \reimp */
int QWindowsXPStyle::pixelMetric(PixelMetric pm, const QStyleOption *option) const
{
    if (!QWindowsXPStylePrivate::useXP())
        return QWindowsStyle::pixelMetric(pm, option);

    int res = QWindowsXPStylePrivate::pixelMetricFromSystemDp(pm, option);
    if (res != QWindowsStylePrivate::InvalidMetric)
        return qRound(qreal(res) * QWindowsStylePrivate::nativeMetricScaleFactor(option));

    res = 0;
    switch (pm) {
    case PM_MenuBarPanelWidth:
    case PM_ButtonDefaultIndicator:
        res = 0;
        break;

    case PM_DefaultFrameWidth:
        res = 1;
        //res = qobject_cast<const QListView*>(widget) ? 2 : 1;
        break;
    case PM_MenuPanelWidth:
    case PM_SpinBoxFrameWidth:
    case PM_SearchFieldFrameWidth:
        res = 1;
        break;

    case PM_TabBarTabOverlap:
    case PM_MenuHMargin:
    case PM_MenuVMargin:
        res = 2;
        break;
#if 0
    case PM_TabBarBaseOverlap:
        if (const QStyleOptionTab *tab = qstyleoption_cast<const QStyleOptionTab *>(option)) {
            switch (tab->shape) {
            case QTabBar::RoundedNorth:
            case QTabBar::TriangularNorth:
            case QTabBar::RoundedWest:
            case QTabBar::TriangularWest:
                res = 1;
                break;
            case QTabBar::RoundedSouth:
            case QTabBar::TriangularSouth:
                res = 2;
                break;
            case QTabBar::RoundedEast:
            case QTabBar::TriangularEast:
                res = 3;
                break;
            }
        }
        break;
#endif
    case PM_SplitterWidth:
        res = QStyleHelper::dpiScaled(5., option);
        break;

    case PM_MdiSubWindowMinimizedWidth:
        res = 160;
        break;

#if 0 && QT_CONFIG(toolbar)
    case PM_ToolBarHandleExtent:
        res = int(QStyleHelper::dpiScaled(8., option));
        break;

#endif // QT_CONFIG(toolbar)
    case PM_DockWidgetSeparatorExtent:
    case PM_DockWidgetTitleMargin:
        res = int(QStyleHelper::dpiScaled(4., option));
        break;

    case PM_ButtonShiftHorizontal:
    case PM_ButtonShiftVertical:
        res = qstyleoption_cast<const QStyleOptionToolButton *>(option) ? 1 : 0;
        break;

    default:
        res = QWindowsStyle::pixelMetric(pm, option);
    }

    return res;
}

/*
  This function is used by subControlRect to check if a button
  should be drawn for the given subControl given a set of window flags.
*/
static bool buttonVisible(const QStyle::SubControl sc, const QStyleOptionTitleBar *tb){

    bool isMinimized = tb->titleBarState & Qt::WindowMinimized;
    bool isMaximized = tb->titleBarState & Qt::WindowMaximized;
    const uint flags = tb->titleBarFlags;
    bool retVal = false;
    switch (sc) {
    case QStyle::SC_TitleBarContextHelpButton:
        if (flags & Qt::WindowContextHelpButtonHint)
            retVal = true;
        break;
    case QStyle::SC_TitleBarMinButton:
        if (!isMinimized && (flags & Qt::WindowMinimizeButtonHint))
            retVal = true;
        break;
    case QStyle::SC_TitleBarNormalButton:
        if (isMinimized && (flags & Qt::WindowMinimizeButtonHint))
            retVal = true;
        else if (isMaximized && (flags & Qt::WindowMaximizeButtonHint))
            retVal = true;
        break;
    case QStyle::SC_TitleBarMaxButton:
        if (!isMaximized && (flags & Qt::WindowMaximizeButtonHint))
            retVal = true;
        break;
    case QStyle::SC_TitleBarShadeButton:
        if (!isMinimized &&  flags & Qt::WindowShadeButtonHint)
            retVal = true;
        break;
    case QStyle::SC_TitleBarUnshadeButton:
        if (isMinimized && flags & Qt::WindowShadeButtonHint)
            retVal = true;
        break;
    case QStyle::SC_TitleBarCloseButton:
        if (flags & Qt::WindowSystemMenuHint)
            retVal = true;
        break;
    case QStyle::SC_TitleBarSysMenu:
        if (flags & Qt::WindowSystemMenuHint)
            retVal = true;
        break;
    default :
        retVal = true;
    }
    return retVal;
}

/*!
    \reimp
*/
QRect QWindowsXPStyle::subControlRect(ComplexControl cc, const QStyleOptionComplex *option,
                                      SubControl subControl) const
{
    if (!QWindowsXPStylePrivate::useXP())
        return QWindowsStyle::subControlRect(cc, option, subControl);

    QRect rect;

    switch (cc) {
    case CC_GroupBox:
        rect = visualRect(option->direction, option->rect,
                          QWindowsStyle::subControlRect(cc, option, subControl));
        if (subControl == QStyle::SC_GroupBoxContents) {
            // This will add the margins that was added by QLayouts in QtWidgets
            // (default to 9 for layouts inside a QGroupBox)
            rect.adjust(9, 9, -9, -9);
        }
        break;
    case CC_TitleBar:
        if (const QStyleOptionTitleBar *tb = qstyleoption_cast<const QStyleOptionTitleBar *>(option)) {
            if (!buttonVisible(subControl, tb))
                return rect;
            const bool isToolTitle = false;
            const int height = tb->rect.height();
            const int width = tb->rect.width();
            const int buttonMargin = int(QStyleHelper::dpiScaled(4, option));
            const qreal factor = QWindowsStylePrivate::nativeMetricScaleFactor(option);
            int buttonHeight = qRound(qreal(GetSystemMetrics(SM_CYSIZE)) * factor)
                - buttonMargin;
            int buttonWidth = qRound(qreal(GetSystemMetrics(SM_CXSIZE)) * factor)
                - buttonMargin;
            const int delta = buttonWidth + 2;
            int controlTop = option->rect.bottom() - buttonHeight - 2;
            const int frameWidth = proxy()->pixelMetric(PM_MdiSubWindowFrameWidth, option);
            const bool sysmenuHint  = (tb->titleBarFlags & Qt::WindowSystemMenuHint) != 0;
            const bool minimizeHint = (tb->titleBarFlags & Qt::WindowMinimizeButtonHint) != 0;
            const bool maximizeHint = (tb->titleBarFlags & Qt::WindowMaximizeButtonHint) != 0;
            const bool contextHint = (tb->titleBarFlags & Qt::WindowContextHelpButtonHint) != 0;
            const bool shadeHint = (tb->titleBarFlags & Qt::WindowShadeButtonHint) != 0;
            bool isMinimized = tb->titleBarState & Qt::WindowMinimized;
            bool isMaximized = tb->titleBarState & Qt::WindowMaximized;
            int offset = 0;

            switch (subControl) {
            case SC_TitleBarLabel:
                rect = QRect(frameWidth, 0, width - (buttonWidth + frameWidth + 10), height);
                if (isToolTitle) {
                    if (sysmenuHint) {
                        rect.adjust(0, 0, -buttonWidth - 3, 0);
                    }
                    if (minimizeHint || maximizeHint)
                        rect.adjust(0, 0, -buttonWidth - 2, 0);
                } else {
                    if (sysmenuHint) {
                        const int leftOffset = height - 8;
                        rect.adjust(leftOffset, 0, 0, 0);
                    }
                    if (minimizeHint)
                        rect.adjust(0, 0, -buttonWidth - 2, 0);
                    if (maximizeHint)
                        rect.adjust(0, 0, -buttonWidth - 2, 0);
                    if (contextHint)
                        rect.adjust(0, 0, -buttonWidth - 2, 0);
                    if (shadeHint)
                        rect.adjust(0, 0, -buttonWidth - 2, 0);
                }
                break;

            case SC_TitleBarContextHelpButton:
                if (tb->titleBarFlags & Qt::WindowContextHelpButtonHint)
                    offset += delta;
                Q_FALLTHROUGH();
            case SC_TitleBarMinButton:
                if (!isMinimized && (tb->titleBarFlags & Qt::WindowMinimizeButtonHint))
                    offset += delta;
                else if (subControl == SC_TitleBarMinButton)
                    break;
                Q_FALLTHROUGH();
            case SC_TitleBarNormalButton:
                if (isMinimized && (tb->titleBarFlags & Qt::WindowMinimizeButtonHint))
                    offset += delta;
                else if (isMaximized && (tb->titleBarFlags & Qt::WindowMaximizeButtonHint))
                    offset += delta;
                else if (subControl == SC_TitleBarNormalButton)
                    break;
                Q_FALLTHROUGH();
            case SC_TitleBarMaxButton:
                if (!isMaximized && (tb->titleBarFlags & Qt::WindowMaximizeButtonHint))
                    offset += delta;
                else if (subControl == SC_TitleBarMaxButton)
                    break;
                Q_FALLTHROUGH();
            case SC_TitleBarShadeButton:
                if (!isMinimized && (tb->titleBarFlags & Qt::WindowShadeButtonHint))
                    offset += delta;
                else if (subControl == SC_TitleBarShadeButton)
                    break;
                Q_FALLTHROUGH();
            case SC_TitleBarUnshadeButton:
                if (isMinimized && (tb->titleBarFlags & Qt::WindowShadeButtonHint))
                    offset += delta;
                else if (subControl == SC_TitleBarUnshadeButton)
                    break;
                Q_FALLTHROUGH();
            case SC_TitleBarCloseButton:
                if (tb->titleBarFlags & Qt::WindowSystemMenuHint)
                    offset += delta;
                else if (subControl == SC_TitleBarCloseButton)
                    break;

                rect.setRect(width - offset - controlTop + 1, controlTop,
                             buttonWidth, buttonHeight);
                break;

            case SC_TitleBarSysMenu:
                {
                    const int controlTop = 6;
                    const int controlHeight = height - controlTop - 3;
                    const int iconExtent = proxy()->pixelMetric(PM_SmallIconSize, option);
                    QSize iconSize = tb->icon.actualSize(QSize(iconExtent, iconExtent));
                    if (tb->icon.isNull())
                        iconSize = QSize(controlHeight, controlHeight);
                    int hPad = (controlHeight - iconSize.height())/2;
                    int vPad = (controlHeight - iconSize.width())/2;
                    rect = QRect(frameWidth + hPad, controlTop + vPad, iconSize.width(), iconSize.height());
                }
                break;
            default:
                break;
            }
        }
        break;
    case CC_ComboBox:
        if (const QStyleOptionComboBox *cmb = qstyleoption_cast<const QStyleOptionComboBox *>(option)) {
            const int x = cmb->rect.x(), y = cmb->rect.y(), wi = cmb->rect.width(), he = cmb->rect.height();
            const int xpos = x + wi - qRound(QStyleHelper::dpiScaled(1 + 16, option));

            switch (subControl) {
            case SC_ComboBoxFrame:
                rect = cmb->rect;
                break;

            case SC_ComboBoxArrow: {
                const qreal dpi = QStyleHelper::dpi(option);
                rect = QRect(xpos, y + qRound(QStyleHelper::dpiScaled(1, dpi)),
                             qRound(QStyleHelper::dpiScaled(16, dpi)),
                             he - qRound(QStyleHelper::dpiScaled(2, dpi)));
            }
                break;

            case SC_ComboBoxEditField: {
                const qreal dpi = QStyleHelper::dpi(option);
                const int frame = qRound(QStyleHelper::dpiScaled(2, dpi));
                rect = QRect(x + frame, y + frame,
                             wi - qRound(QStyleHelper::dpiScaled(3 + 16, dpi)),
                             he - qRound(QStyleHelper::dpiScaled(4, dpi)));
            }
                break;

            case SC_ComboBoxListBoxPopup:
                rect = cmb->rect;
                break;

            default:
                break;
            }
        }
        break;
#if 0 && QT_CONFIG(mdiarea)
    case CC_MdiControls:
    {
        int numSubControls = 0;
        if (option->subControls & SC_MdiCloseButton)
            ++numSubControls;
        if (option->subControls & SC_MdiMinButton)
            ++numSubControls;
        if (option->subControls & SC_MdiNormalButton)
            ++numSubControls;
        if (numSubControls == 0)
            break;

        int buttonWidth = option->rect.width() / numSubControls;
        int offset = 0;
        switch (subControl) {
        case SC_MdiCloseButton:
            // Only one sub control, no offset needed.
            if (numSubControls == 1)
                break;
            offset += buttonWidth;
            Q_FALLTHROUGH();
        case SC_MdiNormalButton:
            // No offset needed if
            // 1) There's only one sub control
            // 2) We have a close button and a normal button (offset already added in SC_MdiClose)
            if (numSubControls == 1 || (numSubControls == 2 && !(option->subControls & SC_MdiMinButton)))
                break;
            if (option->subControls & SC_MdiNormalButton)
                offset += buttonWidth;
            break;
        default:
            break;
        }
        rect = QRect(offset, 0, buttonWidth, option->rect.height());
        break;
    }
#endif // QT_CONFIG(mdiarea)

    default:
        rect = visualRect(option->direction, option->rect,
                          QWindowsStyle::subControlRect(cc, option, subControl));
        break;
    }
    return visualRect(option->direction, option->rect, rect);
}

/*!
    \reimp
*/
QSize QWindowsXPStyle::sizeFromContents(ContentsType ct, const QStyleOption *option,
                                        const QSize &contentsSize) const
{
    if (!QWindowsXPStylePrivate::useXP())
        return QWindowsStyle::sizeFromContents(ct, option, contentsSize);

    QSize sz(contentsSize);
    switch (ct) {
    case CT_LineEdit:
    case CT_ComboBox:
        {
            if (contentsSize.isEmpty()) {
                // Minimum size
                return QSize(20, 20);
            }
            XPThemeData buttontheme(option->window, nullptr, QWindowsXPStylePrivate::ButtonTheme, BP_PUSHBUTTON, PBS_NORMAL);
            if (buttontheme.isValid()) {
                const QMarginsF borderSize = buttontheme.margins();
                if (!borderSize.isNull()) {
                    const qreal margin = qreal(2);
                    sz.rwidth() += qRound(borderSize.left() + borderSize.right() - margin);
                    sz.rheight() += int(borderSize.bottom() + borderSize.top() - margin);
                }
                const int textMargins = 2*(proxy()->pixelMetric(PM_FocusFrameHMargin, option) + 1);
                sz += QSize(qMax(pixelMetric(QStyle::PM_ScrollBarExtent, option)
                                 + textMargins, 23), 0); //arrow button
            }
        }
        break;
    case CT_TabWidget:
        sz += QSize(6, 6);
        break;
    case CT_Menu:
        sz += QSize(1, 0);
        break;
#if 0 && QT_CONFIG(menubar)
    case CT_MenuBarItem:
        if (!sz.isEmpty())
            sz += QSize(windowsItemHMargin * 5 + 1, 6);
        break;
#endif
    case CT_MenuItem:
        if (const QStyleOptionMenuItem *menuitem = qstyleoption_cast<const QStyleOptionMenuItem *>(option))
        {
            if (menuitem->menuItemType != QStyleOptionMenuItem::Separator) {
                sz = QWindowsStyle::sizeFromContents(ct, option, sz);
                sz.setHeight(sz.height() - 2);
                return sz;
            }
        }
        sz = QWindowsStyle::sizeFromContents(ct, option, sz);
        break;

    case CT_MdiControls: {
        sz.setHeight(int(QStyleHelper::dpiScaled(19, option)));
        int width = 54;
        if (const QStyleOptionComplex *styleOpt = qstyleoption_cast<const QStyleOptionComplex *>(option)) {
            width = 0;
            if (styleOpt->subControls & SC_MdiMinButton)
                width += 17 + 1;
            if (styleOpt->subControls & SC_MdiNormalButton)
                width += 17 + 1;
            if (styleOpt->subControls & SC_MdiCloseButton)
                width += 17 + 1;
        }
        sz.setWidth(int(QStyleHelper::dpiScaled(width, option)));
    }
        break;

    case CT_Slider:
        if (const QStyleOptionSlider *slider = qstyleoption_cast<const QStyleOptionSlider *>(option)) {
            QStyle::SubControls sub = slider->subControls;
            const int TickSpace = 5;
            int thick = proxy()->pixelMetric(QStyle::PM_SliderThickness, slider);

            if (slider->tickPosition & QStyleOptionSlider::TicksAbove)
                thick += TickSpace;
            if (slider->tickPosition & QStyleOptionSlider::TicksBelow)
                thick += TickSpace;
            sz.setWidth(thick);

            if (sub & SC_SliderGroove) {
                const int SliderLength = 84;
                sz.setHeight(SliderLength);
            }
            if (slider->orientation == Qt::Horizontal)
                sz.transpose();
            if (sub & SC_SliderHandle) {
                const QSize s = proxy()->subControlRect(CC_Slider, slider, SC_SliderHandle).size();
                sz = sz.expandedTo(s);
            }
        }
        break;
    case CT_ScrollBar :
        // Make sure that the scroll bar is large enough to display the thumb indicator.
        if (const QStyleOptionSlider *slider = qstyleoption_cast<const QStyleOptionSlider *>(option)) {
            const int scrollBarHeight = proxy()->pixelMetric(QStyle::PM_ScrollBarExtent, slider);
            const int scrollBarSliderMin = proxy()->pixelMetric(QStyle::PM_ScrollBarSliderMin, slider);
            int &szw = slider->orientation == Qt::Horizontal ? sz.rwidth() : sz.rheight();
            int &szh = slider->orientation == Qt::Horizontal ? sz.rheight() : sz.rwidth();
            if (slider->subControls & SC_ScrollBarSlider) {
                szw = qMax(szw, scrollBarSliderMin);
                szh = scrollBarHeight;
            } else if (slider->subControls & SC_ScrollBarGroove) {
                szw = qMax(szw, scrollBarSliderMin + 2 * scrollBarHeight);
                szh = scrollBarHeight;
            } else if (slider->subControls & (SC_ScrollBarAddLine| SC_ScrollBarSubLine)) {
                // Assume that the AddLine and SubLine buttons have the same size, and just query
                // for the size of AddLine
                const int sbextent = proxy()->pixelMetric(PM_ScrollBarExtent, slider);
                szw = qMax(szw, sbextent);
                szh = scrollBarHeight;
            }
        }
        break;
    default:
        sz = QWindowsStyle::sizeFromContents(ct, option, sz);
        break;
    }

    return sz;
}


/*! \reimp */
int QWindowsXPStyle::styleHint(StyleHint hint, const QStyleOption *option,
                               QStyleHintReturn *returnData) const
{
  QWindowsXPStylePrivate *d = const_cast<QWindowsXPStylePrivate*>(d_func());
    if (!QWindowsXPStylePrivate::useXP())
        return QWindowsStyle::styleHint(hint, option, returnData);

    int res = 0;
    switch (hint) {

    case SH_EtchDisabledText:
        //res = (qobject_cast<const QLabel*>(widget) != 0);
        res = 0;
        break;

    case SH_SpinControls_DisableOnBounds:
        res = 0;
        break;

    case SH_TitleBar_AutoRaise:
    case SH_TitleBar_NoBorder:
        res = 1;
        break;

    case SH_GroupBox_TextLabelColor:
        if (option->state & QStyle::State_Enabled)
            res = d->groupBoxTextColor;
        else
            res = d->groupBoxTextColorDisabled;
        break;

    case SH_Table_GridLineColor:
        res = 0xC0C0C0;
        break;

    case SH_WindowFrame_Mask:
        {
            res = 1;
            QStyleHintReturnMask *mask = qstyleoption_cast<QStyleHintReturnMask *>(returnData);
            const QStyleOptionTitleBar *titlebar = qstyleoption_cast<const QStyleOptionTitleBar *>(option);
            if (mask && titlebar) {
                // Note certain themes will not return the whole window frame but only the titlebar part when
                // queried This function needs to return the entire window mask, hence we will only fetch the mask for the
                // titlebar itself and add the remaining part of the window rect at the bottom.
                int tbHeight = proxy()->pixelMetric(PM_TitleBarHeight, option);
                QRect titleBarRect = option->rect;
                titleBarRect.setHeight(tbHeight);
                XPThemeData themeData;
                if (titlebar->titleBarState & Qt::WindowMinimized) {
                    themeData = XPThemeData(option->window, nullptr,
                                            QWindowsXPStylePrivate::WindowTheme,
                                            WP_MINCAPTION, CS_ACTIVE, titleBarRect);
                } else {
                    themeData = XPThemeData(option->window, nullptr,
                                            QWindowsXPStylePrivate::WindowTheme,
                                            WP_CAPTION, CS_ACTIVE, titleBarRect);
                }
                mask->region = d->region(themeData) +
                               QRect(0, tbHeight, option->rect.width(), option->rect.height() - tbHeight);
            }
        }
        break;
#if 0 && QT_CONFIG(rubberband)
    case SH_RubberBand_Mask:
        if (qstyleoption_cast<const QStyleOptionRubberBand *>(option))
            res = 0;
        break;
#endif // QT_CONFIG(rubberband)

    case SH_ItemView_DrawDelegateFrame:
        res = 1;
        break;

    default:
        res =QWindowsStyle::styleHint(hint, option, returnData);
    }

    return res;
}

QMargins QWindowsXPStyle::ninePatchMargins(QStyle::ComplexControl cc, const QStyleOptionComplex *opt, const QSize &imageSize) const
{
    QMargins margins;

    switch (cc) {
    case CC_ScrollBar: {
        margins = QWindowsStyle::ninePatchMargins(cc, opt, imageSize);
        if (const auto option = qstyleoption_cast<const QStyleOptionSlider *>(opt)) {
            if (option->orientation == Qt::Horizontal) {
                margins.setTop(-1);
                margins.setBottom(-1);
            } else {
                margins.setLeft(-1);
                margins.setRight(-1);
            }
        }
        break; }
    default:
        margins = QWindowsStyle::ninePatchMargins(cc, opt, imageSize);
        break;
    }

    return margins;
}


/*! \reimp */
QPalette QWindowsXPStyle::standardPalette() const
{
    return QWindowsXPStylePrivate::useXP() ? QPalette() : QWindowsStyle::standardPalette();
}

/*!
    \reimp
*/
QPixmap QWindowsXPStyle::standardPixmap(StandardPixmap standardPixmap, const QStyleOption *option) const
{
    if (!QWindowsXPStylePrivate::useXP())
        return QWindowsStyle::standardPixmap(standardPixmap, option);

#if 0
    switch (standardPixmap) {
    case SP_TitleBarMaxButton:
    case SP_TitleBarCloseButton:
        if (qstyleoption_cast<const QStyleOptionDockWidget *>(option))
        {
            if (widget && widget->isWindow()) {
                XPThemeData theme(widget, nullptr, QWindowsXPStylePrivate::WindowTheme, WP_SMALLCLOSEBUTTON, CBS_NORMAL);
                if (theme.isValid()) {
                    const QSize size = (theme.size() * QWindowsStylePrivate::nativeMetricScaleFactor(option)).toSize();
                    return QIcon(QWindowsStyle::standardPixmap(standardPixmap, option, widget)).pixmap(size);
                }
            }
        }
        break;
    default:
        break;
    }
#endif
    return QWindowsStyle::standardPixmap(standardPixmap, option);
}

/*!
    \reimp
*/
QIcon QWindowsXPStyle::standardIcon(StandardPixmap standardIcon,
                                    const QStyleOption *option) const
{
    if (!QWindowsXPStylePrivate::useXP()) {
        return QWindowsStyle::standardIcon(standardIcon, option);
    }
#if 0
    QWindowsXPStylePrivate *d = const_cast<QWindowsXPStylePrivate*>(d_func());
    switch (standardIcon) {
    case SP_TitleBarMaxButton:
        if (qstyleoption_cast<const QStyleOptionDockWidget *>(option))
        {
            if (d->dockFloat.isNull()) {
                XPThemeData themeSize(nullptr, nullptr, QWindowsXPStylePrivate::WindowTheme,
                                      WP_SMALLCLOSEBUTTON, CBS_NORMAL);
                XPThemeData theme(nullptr, nullptr, QWindowsXPStylePrivate::WindowTheme,
                                  WP_MAXBUTTON, MAXBS_NORMAL);
                if (theme.isValid()) {
                    const QSize size = (themeSize.size() * QWindowsStylePrivate::nativeMetricScaleFactor(option)).toSize();
                    QPixmap pm(size);
                    pm.fill(Qt::transparent);
                    QPainter p(&pm);
                    theme.painter = &p;
                    theme.rect = QRect(QPoint(0, 0), size);
                    d->drawBackground(theme);
                    d->dockFloat.addPixmap(pm, QIcon::Normal, QIcon::Off);    // Normal
                    pm.fill(Qt::transparent);
                    theme.stateId = MAXBS_PUSHED;
                    d->drawBackground(theme);
                    d->dockFloat.addPixmap(pm, QIcon::Normal, QIcon::On);     // Pressed
                    pm.fill(Qt::transparent);
                    theme.stateId = MAXBS_HOT;
                    d->drawBackground(theme);
                    d->dockFloat.addPixmap(pm, QIcon::Active, QIcon::Off);    // Hover
                    pm.fill(Qt::transparent);
                    theme.stateId = MAXBS_INACTIVE;
                    d->drawBackground(theme);
                    d->dockFloat.addPixmap(pm, QIcon::Disabled, QIcon::Off);  // Disabled
                }
            }
            if (widget && widget->isWindow())
                return d->dockFloat;

        }
        break;
    case SP_TitleBarCloseButton:
        if (qstyleoption_cast<const QStyleOptionDockWidget *>(option))
        {
            if (d->dockClose.isNull()) {
                XPThemeData theme(nullptr, nullptr, QWindowsXPStylePrivate::WindowTheme,
                                  WP_SMALLCLOSEBUTTON, CBS_NORMAL);
                if (theme.isValid()) {
                    const QSize size = (theme.size() * QWindowsStylePrivate::nativeMetricScaleFactor(option)).toSize();
                    QPixmap pm(size);
                    pm.fill(Qt::transparent);
                    QPainter p(&pm);
                    theme.painter = &p;
                    theme.partId = WP_CLOSEBUTTON; // ####
                    theme.rect = QRect(QPoint(0, 0), size);
                    d->drawBackground(theme);
                    d->dockClose.addPixmap(pm, QIcon::Normal, QIcon::Off);    // Normal
                    pm.fill(Qt::transparent);
                    theme.stateId = CBS_PUSHED;
                    d->drawBackground(theme);
                    d->dockClose.addPixmap(pm, QIcon::Normal, QIcon::On);     // Pressed
                    pm.fill(Qt::transparent);
                    theme.stateId = CBS_HOT;
                    d->drawBackground(theme);
                    d->dockClose.addPixmap(pm, QIcon::Active, QIcon::Off);    // Hover
                    pm.fill(Qt::transparent);
                    theme.stateId = CBS_INACTIVE;
                    d->drawBackground(theme);
                    d->dockClose.addPixmap(pm, QIcon::Disabled, QIcon::Off);  // Disabled
                }
            }
            if (widget && widget->isWindow())
                return d->dockClose;
        }
        break;
    case SP_TitleBarNormalButton:
        if (qstyleoption_cast<const QStyleOptionDockWidget *>(option))
        {
            if (d->dockFloat.isNull()) {
                XPThemeData themeSize(nullptr, nullptr, QWindowsXPStylePrivate::WindowTheme,
                                      WP_SMALLCLOSEBUTTON, CBS_NORMAL);
                XPThemeData theme(nullptr, nullptr, QWindowsXPStylePrivate::WindowTheme,
                                  WP_RESTOREBUTTON, RBS_NORMAL);
                if (theme.isValid()) {
                    const QSize size = (themeSize.size() * QWindowsStylePrivate::nativeMetricScaleFactor(option)).toSize();
                    QPixmap pm(size);
                    pm.fill(Qt::transparent);
                    QPainter p(&pm);
                    theme.painter = &p;
                    theme.rect = QRect(QPoint(0, 0), size);
                    d->drawBackground(theme);
                    d->dockFloat.addPixmap(pm, QIcon::Normal, QIcon::Off);    // Normal
                    pm.fill(Qt::transparent);
                    theme.stateId = RBS_PUSHED;
                    d->drawBackground(theme);
                    d->dockFloat.addPixmap(pm, QIcon::Normal, QIcon::On);     // Pressed
                    pm.fill(Qt::transparent);
                    theme.stateId = RBS_HOT;
                    d->drawBackground(theme);
                    d->dockFloat.addPixmap(pm, QIcon::Active, QIcon::Off);    // Hover
                    pm.fill(Qt::transparent);
                    theme.stateId = RBS_INACTIVE;
                    d->drawBackground(theme);
                    d->dockFloat.addPixmap(pm, QIcon::Disabled, QIcon::Off);  // Disabled
                }
            }
            if (widget && widget->isWindow())
                return d->dockFloat;

        }
        break;
    default:
        break;
    }
#endif
    return QWindowsStyle::standardIcon(standardIcon, option);
}

/*!
    \internal

    Constructs a QWindowsXPStyle object.
*/
QWindowsXPStyle::QWindowsXPStyle(QWindowsXPStylePrivate &dd) : QWindowsStyle(dd)
{
}

#ifndef QT_NO_DEBUG_STREAM
QDebug operator<<(QDebug d, const XPThemeData &t)
{
    QDebugStateSaver saver(d);
    d.nospace();
    d << "XPThemeData(" << t.window << ", theme=#" << t.theme << ", " << t.htheme
        << ", partId=" << t.partId << ", stateId=" << t.stateId << ", rect=" << t.rect
        << ", mirrorHorizontally=" << t.mirrorHorizontally << ", mirrorVertically="
        << t.mirrorVertically << ", noBorder=" << t.noBorder << ", noContent=" << t.noContent
        << ", rotate=" << t.rotate << ')';
    return d;
}

QDebug operator<<(QDebug d, const ThemeMapKey &k)
{
    QDebugStateSaver saver(d);
    d.nospace();
    d << "ThemeMapKey(theme=#" << k.theme
        << ", partId=" << k.partId << ", stateId=" << k.stateId
        << ", noBorder=" << k.noBorder << ", noContent=" << k.noContent << ')';
    return d;
}

QDebug operator<<(QDebug d, const ThemeMapData &td)
{
    QDebugStateSaver saver(d);
    d.nospace();
    d << "ThemeMapData(alphaType=" << td.alphaType
      << ", dataValid=" << td.dataValid << ", partIsTransparent=" << td.partIsTransparent
      << ", hasAlphaChannel=" << td.hasAlphaChannel << ", wasAlphaSwapped=" << td.wasAlphaSwapped
      << ", hadInvalidAlpha=" << td.hadInvalidAlpha << ')';
    return d;
}
#endif // QT_NO_DEBUG_STREAM

// Debugging code ---------------------------------------------------------------------[ START ]---
// The code for this point on is not compiled by default, but only used as assisting
// debugging code when you uncomment the DEBUG_XP_STYLE define at the top of the file.

#ifdef DEBUG_XP_STYLE
// The schema file expects these to be defined by the user.
#define TMT_ENUMDEF 8
#define TMT_ENUMVAL TEXT('A')
#define TMT_ENUM    TEXT('B')
#define SCHEMA_STRINGS // For 2nd pass on schema file
QT_BEGIN_INCLUDE_NAMESPACE
#include <tmschema.h>
QT_END_INCLUDE_NAMESPACE

// A property's value, type and name combo
struct PropPair {
    int propValue;
    int propType;
    LPCWSTR propName;
};

// Operator for sorting of PropPairs
bool operator<(PropPair a, PropPair b) {
    return wcscmp(a.propName, b.propName) < 0;
}

// Our list of all possible properties
static QList<PropPair> all_props;


/*! \internal
    Dumps a portion of the full native DIB section double buffer.
    The DIB section double buffer is only used when doing special
    transformations to the theme part, or when the real double
    buffer in the paintengine does not have an HDC we may use
    directly.
    Since we cannot rely on the pixel data we get from Microsoft
    when drawing into the DIB section, we use this function to
    see the actual data we got, and can determin the appropriate
    action.
*/
void QWindowsXPStylePrivate::dumpNativeDIB(int w, int h)
{
    if (w && h) {
        static int pCount = 0;
        DWORD *bufPix = (DWORD*)bufferPixels;

        const unsigned int bufferSize = bufferH * bufferW * 16;
        char *bufferDump = new char[bufferSize];
        char *bufferEndAdress = bufferDump + bufferSize;
        char *bufferPos = bufferDump;

        memset(bufferDump, 0, sizeof(bufferDump));
        bufferPos += snprintf(bufferPos, bufferEndAdress - bufferPos, "const int pixelBufferW%d = %d;\n", pCount, w);
        bufferPos += snprintf(bufferPos, bufferEndAdress - bufferPos, "const int pixelBufferH%d = %d;\n", pCount, h);
        bufferPos += snprintf(bufferPos, bufferEndAdress - bufferPos, "const unsigned DWORD pixelBuffer%d[] = {", pCount);
        for (int iy = 0; iy < h; ++iy) {
            bufferPos += snprintf(bufferPos, bufferEndAdress - bufferPos, "\n    ");
            bufPix = (DWORD*)(bufferPixels + (iy * bufferW * 4));
            for (int ix = 0; ix < w; ++ix) {
                bufferPos += snprintf(bufferPos, bufferEndAdress - bufferPos, "0x%08x, ", *bufPix);
                ++bufPix;
            }
        }
        bufferPos += snprintf(bufferPos, bufferEndAdress - bufferPos, "\n};\n\n");
        printf(bufferDump);

        delete[] bufferDump;
        ++pCount;
    }
}

/*! \internal
    Shows the value of a given property for a part.
*/
static void showProperty(XPThemeData &themeData, const PropPair &prop)
{
    PROPERTYORIGIN origin = PO_NOTFOUND;
    GetThemePropertyOrigin(themeData.handle(), themeData.partId, themeData.stateId, prop.propValue, &origin);
    const char *originStr;
    switch (origin) {
    case PO_STATE:
        originStr = "State ";
        break;
    case PO_PART:
        originStr = "Part  ";
        break;
    case PO_CLASS:
        originStr = "Class ";
        break;
    case PO_GLOBAL:
        originStr = "Globl ";
        break;
    case PO_NOTFOUND:
    default:
        originStr = "Unkwn ";
        break;
    }

    switch (prop.propType) {
    case TMT_STRING:
        {
            wchar_t buffer[512];
            GetThemeString(themeData.handle(), themeData.partId, themeData.stateId, prop.propValue, buffer, 512);
            printf("  (%sString)  %-20S: %S\n", originStr, prop.propName, buffer);
        }
        break;
    case TMT_ENUM:
        {
            int result = -1;
            GetThemeEnumValue(themeData.handle(), themeData.partId, themeData.stateId, prop.propValue, &result);
            printf("  (%sEnum)    %-20S: %d\n", originStr, prop.propName, result);
        }
        break;
    case TMT_INT:
        {
            int result = -1;
            GetThemeInt(themeData.handle(), themeData.partId, themeData.stateId, prop.propValue, &result);
            printf("  (%sint)     %-20S: %d\n", originStr, prop.propName, result);
        }
        break;
    case TMT_BOOL:
        {
            BOOL result = false;
            GetThemeBool(themeData.handle(), themeData.partId, themeData.stateId, prop.propValue, &result);
            printf("  (%sbool)    %-20S: %d\n", originStr, prop.propName, result);
        }
        break;
    case TMT_COLOR:
        {
            COLORREF result = 0;
            GetThemeColor(themeData.handle(), themeData.partId, themeData.stateId, prop.propValue, &result);
            printf("  (%scolor)   %-20S: 0x%08X\n", originStr, prop.propName, result);
        }
        break;
    case TMT_MARGINS:
        {
            MARGINS result;
            memset(&result, 0, sizeof(result));
            GetThemeMargins(themeData.handle(), 0, themeData.partId, themeData.stateId, prop.propValue, 0, &result);
            printf("  (%smargins) %-20S: (%d, %d, %d, %d)\n", originStr,
                   prop.propName, result.cxLeftWidth, result.cyTopHeight, result.cxRightWidth, result.cyBottomHeight);
        }
        break;
    case TMT_FILENAME:
        {
            wchar_t buffer[512];
            GetThemeFilename(themeData.handle(), themeData.partId, themeData.stateId, prop.propValue, buffer, 512);
            printf("  (%sfilename)%-20S: %S\n", originStr, prop.propName, buffer);
        }
        break;
    case TMT_SIZE:
        {
            SIZE result1;
            SIZE result2;
            SIZE result3;
            memset(&result1, 0, sizeof(result1));
            memset(&result2, 0, sizeof(result2));
            memset(&result3, 0, sizeof(result3));
            GetThemePartSize(themeData.handle(), 0, themeData.partId, themeData.stateId, 0, TS_MIN,  &result1);
            GetThemePartSize(themeData.handle(), 0, themeData.partId, themeData.stateId, 0, TS_TRUE, &result2);
            GetThemePartSize(themeData.handle(), 0, themeData.partId, themeData.stateId, 0, TS_DRAW, &result3);
            printf("  (%ssize)    %-20S: Min (%d, %d),  True(%d, %d),  Draw(%d, %d)\n", originStr, prop.propName,
                   result1.cx, result1.cy, result2.cx, result2.cy, result3.cx, result3.cy);
        }
        break;
    case TMT_POSITION:
        {
            POINT result;
            memset(&result, 0, sizeof(result));
            GetThemePosition(themeData.handle(), themeData.partId, themeData.stateId, prop.propValue, &result);
            printf("  (%sPosition)%-20S: (%d, %d)\n", originStr, prop.propName, result.x, result.y);
        }
        break;
    case TMT_RECT:
        {
            RECT result;
            memset(&result, 0, sizeof(result));
            GetThemeRect(themeData.handle(), themeData.partId, themeData.stateId, prop.propValue, &result);
            printf("  (%sRect)    %-20S: (%d, %d, %d, %d)\n", originStr, prop.propName, result.left, result.top, result.right, result.bottom);
        }
        break;
    case TMT_FONT:
        {
            LOGFONT result;
            memset(&result, 0, sizeof(result));
            GetThemeFont(themeData.handle(), 0, themeData.partId, themeData.stateId, prop.propValue, &result);
            printf("  (%sFont)    %-20S: %S  height(%d)  width(%d)  weight(%d)\n", originStr, prop.propName,
                   result.lfFaceName, result.lfHeight, result.lfWidth, result.lfWeight);
        }
        break;
    case TMT_INTLIST:
        {
            INTLIST result;
            memset(&result, 0, sizeof(result));
            GetThemeIntList(themeData.handle(), themeData.partId, themeData.stateId, prop.propValue, &result);
            printf("  (%sInt list)%-20S: { ", originStr, prop.propName);
            for (int i = 0; i < result.iValueCount; ++i)
                printf("%d ", result.iValues[i]);
            printf("}\n");
        }
        break;
    default:
        printf("    %s%S : Unknown property type (%d)!\n", originStr, prop.propName, prop.propType);
    }
}

/*! \internal
    Dump all valid properties for a part.
    If it's the first time this function is called, then the name,
    enum value and documentation of all properties are shown, as
    well as all global properties.
*/
void QWindowsXPStylePrivate::showProperties(XPThemeData &themeData)
{
    if (!all_props.count()) {
        const TMSCHEMAINFO *infoTable = GetSchemaInfo();
        for (int i = 0; i < infoTable->iPropCount; ++i) {
            int propType  = infoTable->pPropTable[i].bPrimVal;
            int propValue = infoTable->pPropTable[i].sEnumVal;
            LPCWSTR propName = infoTable->pPropTable[i].pszName;

            switch (propType) {
            case TMT_ENUMDEF:
            case TMT_ENUMVAL:
                continue;
            default:
                if (propType != propValue) {
                    PropPair prop;
                    prop.propValue = propValue;
                    prop.propName  = propName;
                    prop.propType  = propType;
                    all_props.append(prop);
                }
            }
        }
        std::sort(all_props.begin(), all_props.end());

        {// List all properties
            printf("part properties count = %d:\n", all_props.count());
            printf("      Enum  Property Name        Description\n");
            printf("-----------------------------------------------------------\n");
            wchar_t themeName[256];
            pGetCurrentThemeName(themeName, 256, 0, 0, 0, 0);
            for (int j = 0; j < all_props.count(); ++j) {
                PropPair prop = all_props.at(j);
                wchar_t buf[500];
                GetThemeDocumentationProperty(themeName, prop.propName, buf, 500);
                printf("%3d: (%4d) %-20S %S\n", j, prop.propValue, prop.propName, buf);
            }
        }

        {// Show Global values
            printf("Global Properties:\n");
            for (int j = 0; j < all_props.count(); ++j) {
                PropPair prop = all_props.at(j);
                PROPERTYORIGIN origin = PO_NOTFOUND;
                GetThemePropertyOrigin(themeData.handle(), themeData.partId, themeData.stateId, prop.propValue, &origin);
                if (origin == PO_GLOBAL) {
                    showProperty(themeData, prop);
                }
            }
        }
    }

    for (int j = 0; j < all_props.count(); ++j) {
        PropPair prop = all_props.at(j);
        PROPERTYORIGIN origin = PO_NOTFOUND;
        GetThemePropertyOrigin(themeData.handle(), themeData.partId, themeData.stateId, prop.propValue, &origin);
        if (origin != PO_NOTFOUND)
        {
            showProperty(themeData, prop);
        }
    }
}
#endif
// Debugging code -----------------------------------------------------------------------[ END ]---

} //namespace QQC2

QT_END_NAMESPACE
