QRadialGradient露

PyQt5.QtGui.QRadialGradient

Inherits from QGradient.

Description露

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

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:

image-qradialgradient-pad-png

image-qradialgradient-reflect-png

image-qradialgradient-repeat-png

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鈥檚 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鈥檚 center, focal point and radius respectively.

See also

QLinearGradient, QConicalGradient, The Gradients Example.

Methods露

__init__()

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

__init__(QRadialGradient)

TODO

__init__(Union[QPointF, QPoint], float)

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

See also

setColorAt(), setStops().

__init__(Union[QPointF, QPoint], float, Union[QPointF, QPoint])

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.

See also

setColorAt(), setStops().

__init__(float, float, float)

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.

See also

setColorAt(), setStops().

__init__(Union[QPointF, QPoint], float, Union[QPointF, QPoint], float)

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

__init__(float, float, float, float, float)

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.

See also

setColorAt(), setStops().

__init__(float, float, float, float, float, float)

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

center() → QPointF

Returns the center of this radial gradient in logical coordinates.

See also

setCenter(), stops().

centerRadius() → float

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

See also

setCenterRadius(), stops().

focalPoint() → QPointF

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

See also

setFocalPoint(), stops().

focalRadius() → float

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

See also

setFocalRadius(), stops().

radius() → float

Returns the radius of this radial gradient in logical coordinates.

Equivalent to centerRadius()

See also

setRadius(), stops().

setCenter(Union[QPointF, QPoint])

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

See also

center().

setCenter(float, float)

TODO

setCenterRadius(float)

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

See also

centerRadius().

setFocalPoint(Union[QPointF, QPoint])

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

See also

focalPoint().

setFocalPoint(float, float)

TODO

setFocalRadius(float)

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

See also

focalRadius().

setRadius(float)

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

Equivalent to setCenterRadius()

See also

radius().