HowTo resize Subclasses of QGraphicsItem
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maybe by using the prepareGeometryChange in your overrided method resize and then setting the new QSizeF , the update is then done automatically, maybe forcing it will not hurt
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You can use update() function this should do the job.
void QGraphicsItem::update ( const QRectF & rect = QRectF() )
it can be done calling prepareGeometryChange() with boundingRect(), I hope it should do the job ( I have never tested this though) -
Assuming you mean "How do I create a resize-able custom QGraphicsItem?", the subclass needs to handle the mouse events to process a press-move-release sequence as a resize operation. During the operation, call prepareGeometryChange() and change the value which will be returned by the boundingRect().
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[quote author="Bradley" date="1293081440"]Assuming you mean "How do I create a resize-able custom QGraphicsItem?", the subclass needs to handle the mouse events to process a press-move-release sequence as a resize operation. During the operation, call prepareGeometryChange() and change the value which will be returned by the boundingRect().[/quote]
Well. This change the bounding rect of item. But the size of content is still the same. I need to resize content too within the new bounding rectangle.
Thx.