Before launching the window, just use the appropriate window level, and you’re done.
For example,
window.level = NSWindow.Level.popUpMenu
Or, if you want a higher level:
window.level = NSWindow.Level.screenSaver
You can see all the window levels on Apple Documentation page.
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You can ignore mouse events in a window/view by adding just a single line of code.
For various reasons you may want to convert the Color type to a String. And, below is a relatively cleaner way to do it.
You can quit or exit an app with:NSApp.terminate(self)
