QCanvasConicalGradient Class

QCanvasConicalGradient is a brush for conical gradient painting. More...

Header:	`#include <QCanvasConicalGradient>`
CMake:	`find_package(Qt6 REQUIRED COMPONENTS CanvasPainter)` `target_link_libraries(mytarget PRIVATE Qt6::CanvasPainter)`
Since:	Qt 6.11
Inherits:	QCanvasGradient

List of all members, including inherited members

Public Functions

	QCanvasConicalGradient()
	QCanvasConicalGradient(QPointF center, qreal startAngle)
	QCanvasConicalGradient(qreal centerX, qreal centerY, qreal startAngle)
	QCanvasConicalGradient(const QCanvasConicalGradient &)
	QCanvasConicalGradient(QCanvasConicalGradient &&)
	~QCanvasConicalGradient()
QPointF	centerPosition() const
void	setCenterPosition(qreal x, qreal y)
void	setCenterPosition(QPointF center)
void	setStartAngle(qreal angle)
qreal	startAngle() const
QCanvasConicalGradient &	operator=(QCanvasConicalGradient &&)
QCanvasConicalGradient &	operator=(const QCanvasConicalGradient &)

Detailed Description

Conical gradient interpolate colors between start and end points around a point with given coordinates. The angle starts from a line going horizontally right from the center, and proceeds clockwise.

Four squares with conical gradients sweeping around a center point, varying in color

Here is a simple example:

Circle with a conical gradient sweeping from yellow through blue and back to yellow

 QRectF rect(20, 20, 160, 160);
 QCanvasConicalGradient cg(rect.center(), 1.75 * M_PI);
 cg.setColorAt(0.0, "#fdbb2d");
 cg.setColorAt(0.5, "#1a2a6c");
 cg.setColorAt(1.0, "#fdbb2d");
 p->setFillStyle(cg);
 p->beginPath();
 p->ellipse(rect);
 p->fill();

Member Function Documentation

QCanvasConicalGradient::QCanvasConicalGradient()

Constructs a default conical gradient. Gradient center position is (0, 0). Gradient angle is 0.0.

QCanvasConicalGradient::QCanvasConicalGradient(QPointF center, qreal startAngle)

Constructs a conical gradient. Gradient center position is center. Gradient start angle is startAngle.

QCanvasConicalGradient::QCanvasConicalGradient(qreal centerX, qreal centerY, qreal startAngle)

Constructs a conical gradient. Gradient center position is ( centerX, centerY). Gradient start angle is startAngle.

`[constexpr noexcept default]` QCanvasConicalGradient::QCanvasConicalGradient(const QCanvasConicalGradient &)

Copy-constructs an instance of QCanvasConicalGradient.

`[constexpr noexcept default]` QCanvasConicalGradient::QCanvasConicalGradient(QCanvasConicalGradient &&)

Move-constructs an instance of QCanvasConicalGradient.

`[constexpr noexcept default]` QCanvasConicalGradient::~QCanvasConicalGradient()

Destroys the instance of QCanvasConicalGradient.

QPointF QCanvasConicalGradient::centerPosition() const

Returns the center point of conical gradient.

See also setCenterPosition().

void QCanvasConicalGradient::setCenterPosition(qreal x, qreal y)

Sets the center point of conical gradient to ( x, y).

See also centerPosition().

void QCanvasConicalGradient::setCenterPosition(QPointF center)

Sets the center point of conical gradient to center.

This is an overloaded function.

void QCanvasConicalGradient::setStartAngle(qreal angle)

Sets the start angle of conical gradient to angle in radians. The angle starts from a line going horizontally right from the center, and proceeds clockwise.

See also startAngle().

qreal QCanvasConicalGradient::startAngle() const

Returns the start angle of conical gradient in radians.

See also setStartAngle().

`[noexcept default]` QCanvasConicalGradient &QCanvasConicalGradient::operator=(QCanvasConicalGradient &&)

Move-assigns other to this QCanvasConicalGradient instance.

`[noexcept default]` QCanvasConicalGradient &QCanvasConicalGradient::operator=(const QCanvasConicalGradient &)

Copy-assigns other to this QCanvasConicalGradient instance.

Contents

QCanvasConicalGradient Class

Public Functions

Detailed Description

Member Function Documentation

QCanvasConicalGradient::QCanvasConicalGradient()

QCanvasConicalGradient::QCanvasConicalGradient(QPointF center, qreal startAngle)

QCanvasConicalGradient::QCanvasConicalGradient(qreal centerX, qreal centerY, qreal startAngle)

[constexpr noexcept default] QCanvasConicalGradient::QCanvasConicalGradient(const QCanvasConicalGradient &)

[constexpr noexcept default] QCanvasConicalGradient::QCanvasConicalGradient(QCanvasConicalGradient &&)

[constexpr noexcept default] QCanvasConicalGradient::~QCanvasConicalGradient()

QPointF QCanvasConicalGradient::centerPosition() const

void QCanvasConicalGradient::setCenterPosition(qreal x, qreal y)

void QCanvasConicalGradient::setCenterPosition(QPointF center)

void QCanvasConicalGradient::setStartAngle(qreal angle)

qreal QCanvasConicalGradient::startAngle() const

[noexcept default] QCanvasConicalGradient &QCanvasConicalGradient::operator=(QCanvasConicalGradient &&)

[noexcept default] QCanvasConicalGradient &QCanvasConicalGradient::operator=(const QCanvasConicalGradient &)

`[constexpr noexcept default]` QCanvasConicalGradient::QCanvasConicalGradient(const QCanvasConicalGradient &)

`[constexpr noexcept default]` QCanvasConicalGradient::QCanvasConicalGradient(QCanvasConicalGradient &&)

`[constexpr noexcept default]` QCanvasConicalGradient::~QCanvasConicalGradient()

`[noexcept default]` QCanvasConicalGradient &QCanvasConicalGradient::operator=(QCanvasConicalGradient &&)

`[noexcept default]` QCanvasConicalGradient &QCanvasConicalGradient::operator=(const QCanvasConicalGradient &)