345bfb494a
[NSView frame] returns a rectangle in the superview's coordinates, and the superview of an NSWindow's content view (which is the only NSView that GdkQuartz instantiates) is an undocumented NSThemeFrame. While it happens to have the same origin as the content view and the same size as the window's frame this isn't documented and so could change without notice. Convert the window frame coordinates to the view's coordinate system to ensure consistency. Use the view's bounds instead of its frame: The bounds rectangle is in the view's coordinate system. Use the parent NSWindow's frame instead of the private NSThemeFrame's. This ensures that all coordinate comparisons have the same reference. Finally, the macOS coordinate systems origin is at the bottom left, so the title bar is between the content view's height and the window's height, not in negative y in the view's coordinates. Adjust the y comparisons accordingly. Fixes #6297
General Information
GTK is a multi-platform toolkit for creating graphical user interfaces. Offering a complete set of widgets, GTK is suitable for projects ranging from small one-off projects to complete application suites.
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