I want to create an NSButton that sends an action when it is clicked, but when it is pressed for 1 or two seconds it show a NSMenu. Exactly the same as this question here, but since that answer doesn't solve my problem, I decided to ask again.

As an example, go to Finder, open a new window, navigate through some folders and then click the back button: you go to the previous folder. Now click and hold the back button: a menu is displayed. I don't know how to do this with a NSPopUpButton.

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