[ NoAccessorMethod ]
public Widget primary_menu { owned get; set; }
A Menu to use when requested by the remote monitor via a left (or primary) click.
When this property is not null, the menu will be automatically positioned and displayed during a primary button release.
When this property IS null, the activate will be sent for primary button presses.
In both cases, the button_press_event and button_release_events will be fired like normal.
Setting this will remove any floating reference to the menu and assume ownership. As a result, it is not necessary to maintain a reference to it in the parent application (or unref it when finished with it - if you wish to replace the menu, simply call this method again with a new menu.
The same Menu widget can be set as both the primary and secondary.