popup_menu
Description:
[ Version ( since = "2.10" ) ]
public virtual signal void popup_menu (uint button, uint activate_time)
  public virtual signal void popup_menu (uint button, uint activate_time)
Gets emitted when the user brings up the context menu of the status icon.
Whether status icons can have context menus and how these are activated is platform-dependent.
The button and activate_time parameters should be passed as the last to arguments to 
      popup.
Unlike most G_SIGNAL_ACTION signals, this signal is meant to be used by applications and should be wrapped by language bindings.
Parameters:
| button | 
           the button that was pressed, or 0 if the signal is not emitted in response to a button press event  | 
      
| activate_time | 
           the timestamp of the event that triggered the signal emission  |