Details
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Bug
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Resolution: Invalid
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Not Evaluated
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None
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6.8.2
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None
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Windows
Description
I have a QGraphicsScene, to which I connect my own view, that is not derived from a QWidget. Generally, everything works. However, my view never receives the signals changed or sceneRectChanged.
Specifically, my QGraphicsObject calls update() when it needs a repaint. But this does not lead to the signals changed or sceneRectChanged being emitted.
I have the following simple code, that I think should trigger when update() is called:
QObject::connect(mQGraphicsScene, &QGraphicsScene::changed,
[](const QList<QRectF>& region) {
MyMessage(6, "QGraphicsScene::changed signal received.\n");
});
QObject::connect(mQGraphicsScene, &QGraphicsScene::sceneRectChanged,
[](const QRectF& rect) {
MyMessage(6, "QGraphicsScene::sceneRectChanged signal received.\n");
});
The code in the lambdas is never called - I checked with the debugger and also for the printed message.