QCanvasRadialGradient Class
QCanvasRadialGradient is a brush for radial gradient painting. More...
| Header: | #include <QCanvasRadialGradient> |
| CMake: | find_package(Qt6 REQUIRED COMPONENTS CanvasPainter)target_link_libraries(mytarget PRIVATE Qt6::CanvasPainter) |
| Since: | Qt 6.11 |
| Inherits: | QCanvasGradient |
| Status: | Technical Preview |
Public Functions
| QCanvasRadialGradient() | |
| QCanvasRadialGradient(float centerX, float centerY, float outerRadius, float innerRadius = 0.0f) | |
| int | centerPosition() const |
| float | innerRadius() const |
| float | outerRadius() const |
| void | setCenterPosition(float x, float y) |
| void | setCenterPosition(int center) |
| void | setInnerRadius(float radius) |
| void | setOuterRadius(float radius) |
Detailed Description
Radial gradient interpolate colors between start and end points, creating a circle shaped gradient. The gradient is controlled with centerPosition(), outerRadius() and innerRadius().
Here is a simple example:
 | QRectF rect1(0, 0, 200, 200); QCanvasRadialGradient rg(rect1.center(), 100, 0); rg.setColorAt(0.0, "#fdbb2d"); rg.setColorAt(0.6, "#b21f1f"); rg.setColorAt(1.0, "#1a2a6c"); p->setFillStyle(rg); p->fillRect(rect1); |
Member Function Documentation
QCanvasRadialGradient::QCanvasRadialGradient()
Constructs a default radial gradient. Gradient center position is (0, 0). Gradient outer radius is 100.0 and inner radius is 0.0. Gradient start color is white (255, 255, 255) and end color transparent black (0, 0, 0, 0).
QCanvasRadialGradient::QCanvasRadialGradient(float centerX, float centerY, float outerRadius, float innerRadius = 0.0f)
Constructs a radial gradient. Gradient center position is ( centerX, centerY). Gradient outer radius is outerRadius and inner radius is innerRadius. Gradient start color is white (255, 255, 255) and end color transparent black (0, 0, 0, 0).
int QCanvasRadialGradient::centerPosition() const
Returns the center point of radial gradient.
See also setCenterPosition().
float QCanvasRadialGradient::innerRadius() const
Returns the inner radius of radial gradient.
See also setInnerRadius().
float QCanvasRadialGradient::outerRadius() const
Returns the outer radius of radial gradient.
See also setOuterRadius().
void QCanvasRadialGradient::setCenterPosition(float x, float y)
Sets the center point of radial gradient to ( x, y).
See also centerPosition().
void QCanvasRadialGradient::setCenterPosition(int center)
Sets the center point of radial gradient to center.
This is an overloaded function.
void QCanvasRadialGradient::setInnerRadius(float radius)
Sets the inner radius of radial gradient to radius. Start color will be drawn at this radius from center position. The default inner radius is 0.0 meaning that gradient starts directly from center position.
See also innerRadius().
void QCanvasRadialGradient::setOuterRadius(float radius)
Sets the outer radius of radial gradient to radius. End color will be drawn at this radius from center position.
See also outerRadius().