class QGraphicsOpacityEffect

The QGraphicsOpacityEffect class provides an opacity effect. More…

Inheritance diagram of PySide6.QtWidgets.QGraphicsOpacityEffect

Added in version 4.6.

Synopsis

Properties

Methods

Slots

Signals

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

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.

Note

Properties can be used directly when from __feature__ import true_property is used or via accessor functions otherwise.

property opacityᅟ: 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

setOpacityMask()

Access functions:
property opacityMaskᅟ: QBrush

Warning

This section contains snippets that were automatically translated from C++ to Python and may contain errors.

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

setOpacity()

Access functions:
__init__([parent=None])
Parameters:

parent – QObject

Constructs a new QGraphicsOpacityEffect instance. The parent parameter is passed to QGraphicsEffect ‘s constructor.

opacity()
Return type:

float

See also

setOpacity()

Getter of property opacityᅟ .

opacityChanged(opacity)
Parameters:

opacity – float

This signal is emitted whenever the effect’s opacity changes. The opacity parameter holds the effect’s new opacity.

Notification signal of property opacityᅟ .

opacityMask()
Return type:

QBrush

See also

setOpacityMask()

Getter of property opacityMaskᅟ .

opacityMaskChanged(mask)
Parameters:

mask – QBrush

This signal is emitted whenever the effect’s opacity mask changes. The mask parameter holds the effect’s new opacity mask.

Notification signal of property opacityMaskᅟ .

setOpacity(opacity)
Parameters:

opacity – float

See also

opacity()

Setter of property opacityᅟ .

setOpacityMask(mask)
Parameters:

mask – QBrush

See also

opacityMask()

Setter of property opacityMaskᅟ .