ComboBox.connectPopup

gulong connectPopup(T)(T callback,  Flag!"After" after =  No.After) if (isCallable!T
    &&  is(ReturnType!T ==  void)
   && (Parameters!T.length <  1 || (ParameterStorageClassTuple!T[0]  ==  ParameterStorageClass.none &&  is(Parameters!T[0] :  gtk.combo_box.ComboBox)))
   &&  Parameters!T.length <  2)

Connect to Popup signal.

The ::popup signal is a [keybinding signal][GtkBindingSignal] which gets emitted to popup the combo box list.

The default binding for this signal is Alt+Down.

Parameters

`callback`	signal callback delegate or function to connect `void callback(gtk.combo_box.ComboBox comboBox)` `comboBox` the instance the signal is connected to (optional)
`after`	Yes.After to execute callback after default handler, No.After to execute before (default)

Returns

Signal ID