Synopsis#

Methods#

def __init__()
def center()
def centerRadius()
def focalPoint()
def focalRadius()
def radius()
def setCenter()
def setCenterRadius()
def setFocalPoint()
def setFocalRadius()
def setRadius()

Note

This documentation may contain snippets that were automatically translated from C++ to Python. We always welcome contributions to the snippet translation. If you see an issue with the translation, you can also let us know by creating a ticket on https:/bugreports.qt.io/projects/PYSIDE

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:

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

__init__(center, centerRadius, focalPoint, focalRadius)#

Parameters:

center – QPointF
centerRadius – float
focalPoint – QPointF
focalRadius – float

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

__init__(center, radius)

Parameters:

center – QPointF
radius – float

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

See also

setColorAt() setStops()

__init__(center, radius, focalPoint)

Parameters:

center – QPointF
radius – float
focalPoint – QPointF

Constructs a simple radial gradient with the given center, radius and focalPoint.

Note

If the given focal point is outside the circle defined by the center point and radius, it will be re-adjusted to lie at a point on the circle where it intersects with the line from center to focalPoint.