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I have a drawRect: in a view that I have in a window that takes a few seconds to fully render the rect. I want a conditional that lets me run a simple white fill when the user is dragging the window to be larger, so that it does not lag while trying to run the full drawRect. How can I capture the user-is-dragging-window-to-new-size event so I can set my flag? Thanks.


This flag already exists; it’s an NSView method called -inLiveResize. Just check that for your view when you’re about to draw. – Bo