/**
* gtk_tree_drag_source_drag_data_delete:
* @drag_source: a #GtkTreeDragSource
* @path: row that was being dragged
*
* Asks the #GtkTreeDragSource to delete the row at @path, because
* it was moved somewhere else via drag-and-drop. Returns %FALSE
* if the deletion fails because @path no longer exists, or for
* some model-specific reason. Should robustly handle a @path no
* longer found in the model!
*
* Returns: %TRUE if the row was successfully deleted
**/
gboolean
gtk_tree_drag_source_drag_data_delete (GtkTreeDragSource *drag_source,
GtkTreePath *path)
{
GtkTreeDragSourceIface *iface = GTK_TREE_DRAG_SOURCE_GET_IFACE (drag_source);
g_return_val_if_fail (iface->drag_data_delete != NULL, FALSE);
g_return_val_if_fail (path != NULL, FALSE);
return (* iface->drag_data_delete) (drag_source, path);
}
/**
* gtk_tree_drag_source_drag_data_get:
* @drag_source: a #GtkTreeDragSource
* @path: row that was dragged
* @selection_data: a #GtkSelectionData to fill with data
* from the dragged row
*
* Asks the #GtkTreeDragSource to fill in @selection_data with a
* representation of the row at @path. @selection_data->target gives
* the required type of the data. Should robustly handle a @path no
* longer found in the model!
*
* Returns: %TRUE if data of the required type was provided
**/
gboolean
gtk_tree_drag_source_drag_data_get (GtkTreeDragSource *drag_source,
GtkTreePath *path,
GtkSelectionData *selection_data)
{
GtkTreeDragSourceIface *iface = GTK_TREE_DRAG_SOURCE_GET_IFACE (drag_source);
g_return_val_if_fail (iface->drag_data_get != NULL, FALSE);
g_return_val_if_fail (path != NULL, FALSE);
g_return_val_if_fail (selection_data != NULL, FALSE);
return (* iface->drag_data_get) (drag_source, path, selection_data);
}
void
ui_dnd_setup_feedlist (GtkTreeStore *feedstore)
{
GtkTreeDragSourceIface *drag_source_iface;
GtkTreeDragDestIface *drag_dest_iface;
drag_source_iface = GTK_TREE_DRAG_SOURCE_GET_IFACE (GTK_TREE_MODEL (feedstore));
drag_source_iface->row_draggable = ui_dnd_feed_draggable;
drag_dest_iface = GTK_TREE_DRAG_DEST_GET_IFACE (GTK_TREE_MODEL (feedstore));
old_feed_drop_possible = drag_dest_iface->row_drop_possible;
old_feed_drag_data_received = drag_dest_iface->drag_data_received;
drag_dest_iface->row_drop_possible = ui_dnd_feed_drop_possible;
drag_dest_iface->drag_data_received = ui_dnd_feed_drag_data_received;
}
/**
* gtk_tree_drag_source_row_draggable:
* @drag_source: a #GtkTreeDragSource
* @path: row on which user is initiating a drag
*
* Asks the #GtkTreeDragSource whether a particular row can be used as
* the source of a DND operation. If the source doesn’t implement
* this interface, the row is assumed draggable.
*
* Returns: %TRUE if the row can be dragged
**/
gboolean
gtk_tree_drag_source_row_draggable (GtkTreeDragSource *drag_source,
GtkTreePath *path)
{
GtkTreeDragSourceIface *iface = GTK_TREE_DRAG_SOURCE_GET_IFACE (drag_source);
g_return_val_if_fail (path != NULL, FALSE);
if (iface->row_draggable)
return (* iface->row_draggable) (drag_source, path);
else
return TRUE;
/* Returning TRUE if row_draggable is not implemented is a fallback.
Interface implementations such as GtkTreeStore and GtkListStore really should
implement row_draggable. */
}
