Using a single `QGraphicsEffect` for multiple widgets

[diniamo]

I'm looking to use a single QGraphicsEffect, which I constructed, for multiple widgets.
If I set a single effect object to multiple widgets, only the last one that I set actually gets the effect.

[SGaist]

Hi,

As stated in the documentation of QWidget::setGraphicsEffect, the widget retrieves it if it was already applied and takes ownership of the effect.

It will apply it to all its children.

[eyllanesc]

@diniamo A QGraphicsEffect can only be set on a single widget as indicated in the docs: If effect is the installed effect on a different widget, setGraphicsEffect() will remove the effect from the widget and install it on this widget.

[diniamo]

Hmm I see, but then how do I solve this in a simple way? QGraphicsEffects don't tend to have a copy constructor.

[SGaist]

If they are separated, you use one for each widget.

[eyllanesc]

@diniamo QGraphicsEffect is a QObject so it does not have a copy-constructor. You have to create a new QGraphicsEffect for each QWidget

[diniamo]

What I do right now is have an array and then loop over it and set the stuff I need for each and then just manually set for each widget. I thought there would be an easier way.