QRadialGradient

The QRadialGradient class is used in combination with QBrush to specify a radial gradient brush. More

Inheritance diagram of PySide2.QtGui.QRadialGradient

Synopsis

Functions

Detailed Description

Qt supports both simple and extended radial gradients.

Simple radial gradients interpolate colors between a focal point and end points on a circle surrounding it. Extended radial gradients interpolate colors between a focal circle and a center circle. Points outside the cone defined by the two circles will be transparent. For simple radial gradients the focal point is adjusted to lie inside the center circle, whereas the focal point can have any position in an extended radial gradient.

Outside the end points the gradient is either padded, reflected or repeated depending on the currently set spread method:

qradialgradient-pad1

qradialgradient-reflect2

qradialgradient-repeat3

PadSpread (default)

ReflectSpread

RepeatSpread

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 QRadialGradient class provides the center() , focalPoint() and radius() functions returning the gradient’s center, focal point and radius respectively.

See also

QLinearGradient QConicalGradient The Gradients Example

class QRadialGradient

QRadialGradient(center, centerRadius, focalPoint, focalRadius)

QRadialGradient(center, radius)

QRadialGradient(center, radius, focalPoint)

QRadialGradient(QRadialGradient)

QRadialGradient(cx, cy, centerRadius, fx, fy, focalRadius)

QRadialGradient(cx, cy, radius)

QRadialGradient(cx, cy, radius, fx, fy)

param QRadialGradient

QRadialGradient

param fx

qreal

param fy

qreal

param focalPoint

QPointF

param radius

qreal

param cx

qreal

param cy

qreal

param center

QPointF

param focalRadius

qreal

param centerRadius

qreal

Constructs a simple radial gradient with the center and focal point at (0, 0) with a radius of 1.

Constructs an extended radial gradient with the given center , centerRadius , focalPoint , and focalRadius .

Constructs a simple radial gradient with the given center , radius and the focal point in the circle center.

Constructs an extended radial gradient with the given center (cx , cy ), center radius, centerRadius , focal point, (fx , fy ), and focal radius focalRadius .

Constructs a simple radial gradient with the center at (cx , cy ) and the specified radius . The focal point lies at the center of the circle.

Constructs a simple radial gradient with the given center (cx , cy ), radius and focal point (fx , fy ).

Note

If the given focal point is outside the circle defined by the center (cx , cy ) and the radius it will be re-adjusted to the intersection between the line from the center to the focal point and the circle.

PySide2.QtGui.QRadialGradient.center()
Return type

QPointF

Returns the center of this radial gradient in logical coordinates.

See also

setCenter() stops()

PySide2.QtGui.QRadialGradient.centerRadius()
Return type

qreal

Returns the center radius of this radial gradient in logical coordinates.

PySide2.QtGui.QRadialGradient.focalPoint()
Return type

QPointF

Returns the focal point of this radial gradient in logical coordinates.

PySide2.QtGui.QRadialGradient.focalRadius()
Return type

qreal

Returns the focal radius of this radial gradient in logical coordinates.

PySide2.QtGui.QRadialGradient.radius()
Return type

qreal

Returns the radius of this radial gradient in logical coordinates.

Equivalent to centerRadius()

See also

setRadius() stops()

PySide2.QtGui.QRadialGradient.setCenter(center)
Parameters

centerQPointF

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

See also

center()

PySide2.QtGui.QRadialGradient.setCenter(x, y)
Parameters
  • xqreal

  • yqreal

This is an overloaded function.

Sets the center of this radial gradient in logical coordinates to (x , y ).

See also

center()

PySide2.QtGui.QRadialGradient.setCenterRadius(radius)
Parameters

radiusqreal

Sets the center radius of this radial gradient in logical coordinates to radius

See also

centerRadius()

PySide2.QtGui.QRadialGradient.setFocalPoint(focalPoint)
Parameters

focalPointQPointF

Sets the focal point of this radial gradient in logical coordinates to focalPoint .

See also

focalPoint()

PySide2.QtGui.QRadialGradient.setFocalPoint(x, y)
Parameters
  • xqreal

  • yqreal

This is an overloaded function.

Sets the focal point of this radial gradient in logical coordinates to (x , y ).

See also

focalPoint()

PySide2.QtGui.QRadialGradient.setFocalRadius(radius)
Parameters

radiusqreal

Sets the focal radius of this radial gradient in logical coordinates to radius

See also

focalRadius()

PySide2.QtGui.QRadialGradient.setRadius(radius)
Parameters

radiusqreal

Sets the radius of this radial gradient in logical coordinates to radius

Equivalent to setCenterRadius()

See also

radius()