QLinearGradient ¶

概要 ¶

详细描述 ¶

PySide.QtGui.QLinearGradient class is used in combination with PySide.QtGui.QBrush 以指定线性渐变笔刷。

Linear gradients interpolate colors between start and end points. Outside these points the gradient is either padded, reflected or repeated depending on the currently set spread 方法：

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 QGradient.setColorAt() 或 QGradient.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 PySide.QtGui.QGradient ， PySide.QtGui.QLinearGradient class provides the PySide.QtGui.QLinearGradient.finalStop() function which returns the final stop point of the gradient, and the PySide.QtGui.QLinearGradient.start() function returning the start point of the gradient.

另请参阅

PySide.QtGui.QRadialGradient PySide.QtGui.QConicalGradient The Gradients Demo

class PySide.QtGui. QLinearGradient ¶

class PySide.QtGui. QLinearGradient ( QLinearGradient )

class PySide.QtGui. QLinearGradient ( start , finalStop )

class PySide.QtGui. QLinearGradient ( xStart , yStart , xFinalStop , yFinalStop )

参数：	finalStop – PySide.QtCore.QPointF xFinalStop – PySide.QtCore.qreal yFinalStop – PySide.QtCore.qreal QLinearGradient – PySide.QtGui.QLinearGradient start – PySide.QtCore.QPointF yStart – PySide.QtCore.qreal xStart – PySide.QtCore.qreal

Constructs a default linear gradient with interpolation area between (0, 0) and (1, 1).

另请参阅

QGradient.setColorAt() PySide.QtGui.QLinearGradient.setStart() PySide.QtGui.QLinearGradient.setFinalStop()

Constructs a linear gradient with interpolation area between the given start point and finalStop .

注意

The expected parameter values are in pixels.

另请参阅

QGradient.setColorAt() QGradient.setStops()

Constructs a linear gradient with interpolation area between ( x1 , y1 ) 和 ( x2 , y2 ).

注意

The expected parameter values are in pixels.

另请参阅

QGradient.setColorAt() QGradient.setStops()

PySide.QtGui.QLinearGradient. finalStop ( ) ¶

返回类型：	PySide.QtCore.QPointF

Returns the final stop point of this linear gradient in logical coordinates.

另请参阅

PySide.QtGui.QLinearGradient.setFinalStop() QGradient.stops()

PySide.QtGui.QLinearGradient. setFinalStop ( stop ) ¶

参数：	stop – PySide.QtCore.QPointF

Sets the final stop point of this linear gradient in logical coordinates to stop .

另请参阅

PySide.QtGui.QLinearGradient.finalStop()

PySide.QtGui.QLinearGradient. setFinalStop ( x , y )

参数：	x – PySide.QtCore.qreal y – PySide.QtCore.qreal

这是重载函数。

Sets the final stop point of this linear gradient in logical coordinates to x , y .

另请参阅

PySide.QtGui.QLinearGradient.start()

PySide.QtGui.QLinearGradient. setStart ( x , y ) ¶

参数：	x – PySide.QtCore.qreal y – PySide.QtCore.qreal

这是重载函数。

Sets the start point of this linear gradient in logical coordinates to x , y .

另请参阅

PySide.QtGui.QLinearGradient.start()

PySide.QtGui.QLinearGradient. setStart ( start )

参数：	start – PySide.QtCore.QPointF

Sets the start point of this linear gradient in logical coordinates to start .

另请参阅

PySide.QtGui.QLinearGradient.start()

PySide.QtGui.QLinearGradient. start ( ) ¶

返回类型：	PySide.QtCore.QPointF

Returns the start point of this linear gradient in logical coordinates.

另请参阅

PySide.QtGui.QLinearGradient.setStart() QGradient.stops()