Rect limit = GetWorkArea();
		// ...
	#ifdef PLATFORM_X11
		Rect fm = windowFrameMargin; //<this returns empty Rect...
		if((fm.left|fm.right|fm.top|fm.bottom) == 0)
			fm = Rect(8, 32, 8, 8); // ... so this is chosen as safe values
		limit.left += fm.left;
		limit.right -= fm.right;
		limit.top += fm.top;
		limit.bottom -= fm.bottom;
#endif