/**
* gtk_tree_drag_dest_row_drop_possible:
* @drag_dest: a #GtkTreeDragDest
* @dest_path: destination row
* @selection_data: the data being dragged
*
* Determines whether a drop is possible before the given @dest_path,
* at the same depth as @dest_path. i.e., can we drop the data in
* @selection_data at that location. @dest_path does not have to
* exist; the return value will almost certainly be %FALSE if the
* parent of @dest_path doesn’t exist, though.
*
* Returns: %TRUE if a drop is possible before @dest_path
**/
gboolean
gtk_tree_drag_dest_row_drop_possible (GtkTreeDragDest *drag_dest,
GtkTreePath *dest_path,
GtkSelectionData *selection_data)
{
GtkTreeDragDestIface *iface = GTK_TREE_DRAG_DEST_GET_IFACE (drag_dest);
g_return_val_if_fail (iface->row_drop_possible != NULL, FALSE);
g_return_val_if_fail (selection_data != NULL, FALSE);
g_return_val_if_fail (dest_path != NULL, FALSE);
return (* iface->row_drop_possible) (drag_dest, dest_path, selection_data);
}
/**
* gtk_tree_drag_dest_drag_data_received:
* @drag_dest: a #GtkTreeDragDest
* @dest: row to drop in front of
* @selection_data: data to drop
*
* Asks the #GtkTreeDragDest to insert a row before the path @dest,
* deriving the contents of the row from @selection_data. If @dest is
* outside the tree so that inserting before it is impossible, %FALSE
* will be returned. Also, %FALSE may be returned if the new row is
* not created for some model-specific reason. Should robustly handle
* a @dest no longer found in the model!
*
* Returns: whether a new row was created before position @dest
**/
gboolean
gtk_tree_drag_dest_drag_data_received (GtkTreeDragDest *drag_dest,
GtkTreePath *dest,
GtkSelectionData *selection_data)
{
GtkTreeDragDestIface *iface = GTK_TREE_DRAG_DEST_GET_IFACE (drag_dest);
g_return_val_if_fail (iface->drag_data_received != NULL, FALSE);
g_return_val_if_fail (dest != NULL, FALSE);
g_return_val_if_fail (selection_data != NULL, FALSE);
return (* iface->drag_data_received) (drag_dest, dest, 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;
}
