ToolItem.addOnCreateMenuProxy

This signal is emitted when the toolbar needs information from @tool_item about whether the item should appear in the toolbar overflow menu. In response the tool item should either

- call gtk_tool_item_set_proxy_menu_item() with a %NULL pointer and return %TRUE to indicate that the item should not appear in the overflow menu

- call gtk_tool_item_set_proxy_menu_item() with a new menu item and return %TRUE, or

- return %FALSE to indicate that the signal was not handled by the item. This means that the item will not appear in the overflow menu unless a later handler installs a menu item.

The toolbar may cache the result of this signal. When the tool item changes how it will respond to this signal it must call gtk_tool_item_rebuild_menu() to invalidate the cache and ensure that the toolbar rebuilds its overflow menu.

Return: %TRUE if the signal was handled, %FALSE if not

class ToolItem
addOnCreateMenuProxy
(
bool delegate dlg
,)

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