Details
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Bug
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Resolution: Unresolved
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P3: Somewhat important
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None
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4.8.4
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None
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Linux Qt-4.8.4
Description
Say I have a QGraphicsItem* main as root item and many QGraphicsItem as children.
When all QGrapihicsItem::setCacheMode(DeviceCoordinateCache) and GraphicsEffect applied to the root(main) item, some children item will not be rendered when zooming in.
Note that if I remove caching(NoCache) or don't apply GraphicsEffect, all children will be rendered.
I suspect this is has something to do with viewport/visible rectangle.
Attached is an project that illustrate the problem.