Check if UIElement is connected to presentation source #1533
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Pull request type
Please check the type of change your PR introduces:
What is the current behavior?
To call PointFromScreen, the visual needs to be connected to a presentation source. Otherwise an
InvalidOperationExceptionwith the messageThis Visual is not connected to a PresentationSourceis thrown. This is already catched, but we can avoid this by checking whether it's connected. I also refactored the almost unreadable panel fallback into a separate method.