WPF Popup hiding problem

Question

Suppose you have a ToggleButton for opening a Popup, same behaviour as all known elements as ComboBox etc.

... which is this c

Answer 1

You could just bind the Popups StaysOpen property to the Buttons IsMouseOver property. This way, the popup will close whenever you click something outside the popup (IsMouseOver = false = StaysOpen) and it will close the Popup when clicking the ToggleButton (IsMouseOver = true = StaysOpen). This way, even the clicks outside the Popup will be handled.