QGraphicsOpacityEffect#
The QGraphicsOpacityEffect class provides an opacity effect. More…
New in version 4.6.
Synopsis#
Functions#
def
opacity()def
opacityMask()
Slots#
def
setOpacity(opacity)def
setOpacityMask(mask)
Signals#
def
opacityChanged(opacity)def
opacityMaskChanged(mask)
Detailed Description#
An opacity effect renders the source with an opacity. This effect is useful for making the source semi-transparent, similar to a fade-in/fade-out sequence. The opacity can be modified using the setOpacity() function.
By default, the opacity is 0.7.
- class PySide6.QtWidgets.QGraphicsOpacityEffect([parent=None])#
- Parameters
parent –
PySide6.QtCore.QObject
Constructs a new QGraphicsOpacityEffect instance. The parent parameter is passed to QGraphicsEffect ‘s constructor.
- PySide6.QtWidgets.QGraphicsOpacityEffect.opacity()#
- Return type
float
This property holds the opacity of the effect..
The value should be in the range of 0.0 to 1.0, where 0.0 is fully transparent and 1.0 is fully opaque.
By default, the opacity is 0.7.
See also
- PySide6.QtWidgets.QGraphicsOpacityEffect.opacityChanged(opacity)#
- Parameters
opacity – float
This signal is emitted whenever the effect’s opacity changes. The opacity parameter holds the effect’s new opacity.
- PySide6.QtWidgets.QGraphicsOpacityEffect.opacityMask()#
- Return type
This property holds the opacity mask of the effect..
An opacity mask allows you apply opacity to portions of an element.
For example:
... alphaGradient = QLinearGradient(rect.topLeft(), rect.bottomLeft()) alphaGradient.setColorAt(0.0, Qt.transparent) alphaGradient.setColorAt(0.5, Qt.black) alphaGradient.setColorAt(1.0, Qt.transparent) effect = QGraphicsOpacityEffect() effect.setOpacityMask(alphaGradient) ...
There is no opacity mask by default.
See also
- PySide6.QtWidgets.QGraphicsOpacityEffect.opacityMaskChanged(mask)#
- Parameters
mask –
PySide6.QtGui.QBrush
This signal is emitted whenever the effect’s opacity mask changes. The mask parameter holds the effect’s new opacity mask.
- PySide6.QtWidgets.QGraphicsOpacityEffect.setOpacity(opacity)#
- Parameters
opacity – float
This property holds the opacity of the effect..
The value should be in the range of 0.0 to 1.0, where 0.0 is fully transparent and 1.0 is fully opaque.
By default, the opacity is 0.7.
See also
- PySide6.QtWidgets.QGraphicsOpacityEffect.setOpacityMask(mask)#
- Parameters
mask –
PySide6.QtGui.QBrush
This property holds the opacity mask of the effect..
An opacity mask allows you apply opacity to portions of an element.
For example:
... alphaGradient = QLinearGradient(rect.topLeft(), rect.bottomLeft()) alphaGradient.setColorAt(0.0, Qt.transparent) alphaGradient.setColorAt(0.5, Qt.black) alphaGradient.setColorAt(1.0, Qt.transparent) effect = QGraphicsOpacityEffect() effect.setOpacityMask(alphaGradient) ...
There is no opacity mask by default.
See also