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indicator-messages is the first indicator that uses GMenuModel instead
of Dbusmenu to send its menus to the panel. Its panel plugin uses
gtk_menu_new_from_model to create a GtkMenu widget from a GMenuModel.
Most of the menu items in the messaging menu are custom widgets (to show
icons, message counts, and the application-is-running triangles).
However, gtk_menu_new_from_model always creates GtkCheckMenuItems.
The attached patch solves this problem by introducing a new menu item
attribute ("x-canonical-type"). The value of this attribute should be a
valid GType name (as passed to g_type_from_name). An instance of this
type is created to represent the menu item if the type is a subclass of
GtkMenuItem and it has these two properties:
- "menu-item": a GMenuItem from which to build the item
- "action-group": a GActionGroup which contains the action for this menu item
indicator-messages already depends on this patch and is a first "test-
case" for this API.
The patch doesn't introduce new public functions. "x-canonical-type"
should be considered private for now.
** Affects: gtk+3.0 (Ubuntu)
Importance: Wishlist
Assignee: Lars Uebernickel (larsu)
Status: Fix Committed
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gtk_menu_new_from_model doesn't support custom menu items
https://bugs.launchpad.net/bugs/1039476
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