Function
GtkTreeListModelCreateModelFunc
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Declaration
GListModel*
(* GtkTreeListModelCreateModelFunc) (
GObject* item,
gpointer user_data
)
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Description [src]
Prototype of the function called to create new child models when
gtk_tree_list_row_set_expanded() is called.
This function can return NULL to indicate that item is guaranteed to be
a leaf node and will never have children. If it does not have children but
may get children later, it should return an empty model that is filled once
children arrive.
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Parameters
item-
Type:
GObjectThe item that is being expanded.
The data is owned by the caller of the function. user_data-
Type:
gpointerUser data passed when registering the function.
The argument can be NULL.The data is owned by the caller of the function.
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Return value
Type: A list model of GObject
The model tracking the children of
item or NULL if item can never have children.
| The caller of the function takes ownership of the data, and is responsible for freeing it. |
The return value can be NULL. |