The QConicalGradient class is used in combination with QBrush to specify a conical gradient brush. More Detailed Description¶

Conical gradients interpolate interpolate colors counter-clockwise around a center point. The colors in a gradient is defined using stop points of the QGradientStop type, i.e. a position and a color. Use the setColorAt() or the setStops() function to define the stop points. It is the gradient’s complete set of stop points that describes how the gradient area should be filled. If no stop points have been specified, a gradient of black at 0 to white at 1 is used.

In addition to the functions inherited from QGradient , the QConicalGradient class provides the angle() and center() functions returning the start angle and center of the gradient.

Note that the setSpread() function has no effect for conical gradients. The reason is that the conical gradient is closed by definition, i.e. the conical gradient fills the entire circle from 0 - 360 degrees, while the boundary of a radial or a linear gradient can be specified through its radius or final stop points, respectively.

param startAngle

qreal

param cx

qreal

param cy

qreal

param center

QPointF

Constructs a conical with center at (0, 0) starting the interpolation at angle 0.

Constructs a conical gradient with the given center , starting the interpolation at the given angle . The angle must be specified in degrees between 0 and 360.

Constructs a conical gradient with the given center (cx , cy ), starting the interpolation at the given angle . The angle must be specified in degrees between 0 and 360.

Return type

qreal

Returns the start angle of the conical gradient in logical coordinates.

Return type

QPointF

Returns the center of the conical gradient in logical coordinates.

Parameters

angleqreal

Sets angle to be the start angle for this conical gradient in logical coordinates.

angle()

Parameters

centerQPointF

Sets the center of this conical gradient in logical coordinates to center .

center()