ComboBox SAME item selected action listener

Question

A combo box will fire an event if a DIFFERENT value is selected. I want to be also be able to listen to the SAME item being selected (that is, valueProperty has no change).

Answer 1

comboBox.showingProperty().addListener((obs, wasShowing, isShowing) -> {
    if (! isShowing) {
        System.out.println("Combo box popup hidden");
    }
});

This event handler might be triggered before the value is changed.