Menus are normally just added to a window, but they can
also be displayed temporarily as the result of a mouse button click. For
instance, a context menu might be diplayed when the user clicks their right
mouse button.
The UI layout for a popup menu should use the popup node. For instance:
Glib::ustring ui_info =
"<ui>"
" <popup name='PopupMenu'>"
" <menuitem action='ContextEdit'/>"
" <menuitem action='ContextProcess'/>"
" <menuitem action='ContextRemove'/>"
" </popup>"
"</ui";
m_refUIManager->add_ui_from_string(ui_info);
To show the popup menu, use Gtk::Menu's
popup() method, providing the button identifier and the
time of activation, as provided by the button_press_event
signal, which you will need to handle anyway. For instance:
bool ExampleWindow::on_button_press_event(GdkEventButton* event)
{
if( (event->type == GDK_BUTTON_PRESS) && (event->button == 3) )
{
m_Menu_Popup->popup(event->button, event->time);
return true; //It has been handled.
}
else
return false;
}