GtkTreeView drag-and-drop

gtk_tree_drag_source_drag_data_delete ()

gboolean
gtk_tree_drag_source_drag_data_delete (GtkTreeDragSource *drag_source,
                                       GtkTreePath *path);

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!

gtk_tree_drag_source_drag_data_get ()

gboolean
gtk_tree_drag_source_drag_data_get (GtkTreeDragSource *drag_source,
                                    GtkTreePath *path,
                                    GtkSelectionData *selection_data);

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!

gtk_tree_drag_source_row_draggable ()

gboolean
gtk_tree_drag_source_row_draggable (GtkTreeDragSource *drag_source,
                                    GtkTreePath *path);

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.

gtk_tree_drag_dest_drag_data_received ()

gboolean
gtk_tree_drag_dest_drag_data_received (GtkTreeDragDest *drag_dest,
                                       GtkTreePath *dest,
                                       GtkSelectionData *selection_data);

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!

gtk_tree_drag_dest_row_drop_possible ()

gboolean
gtk_tree_drag_dest_row_drop_possible (GtkTreeDragDest *drag_dest,
                                      GtkTreePath *dest_path,
                                      GtkSelectionData *selection_data);

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.

gtk_tree_set_row_drag_data ()

gboolean
gtk_tree_set_row_drag_data (GtkSelectionData *selection_data,
                            GtkTreeModel *tree_model,
                            GtkTreePath *path);

Sets selection data of target type GTK_TREE_MODEL_ROW. Normally used in a drag_data_get handler.

gtk_tree_get_row_drag_data ()

gboolean
gtk_tree_get_row_drag_data (GtkSelectionData *selection_data,
                            GtkTreeModel **tree_model,
                            GtkTreePath **path);

Obtains a tree_model and path from selection data of target type GTK_TREE_MODEL_ROW. Normally called from a drag_data_received handler. This function can only be used if selection_data originates from the same process that’s calling this function, because a pointer to the tree model is being passed around. If you aren’t in the same process, then you'll get memory corruption. In the GtkTreeDragDest drag_data_received handler, you can assume that selection data of type GTK_TREE_MODEL_ROW is in from the current process. The returned path must be freed with gtk_tree_path_free().

GtkTreeDragSource

typedef struct _GtkTreeDragSource GtkTreeDragSource;

struct GtkTreeDragSourceIface

struct GtkTreeDragSourceIface {
  /* VTable - not signals */

  gboolean     (* row_draggable)        (GtkTreeDragSource   *drag_source,
                                         GtkTreePath         *path);

  gboolean     (* drag_data_get)        (GtkTreeDragSource   *drag_source,
                                         GtkTreePath         *path,
                                         GtkSelectionData    *selection_data);

  gboolean     (* drag_data_delete)     (GtkTreeDragSource *drag_source,
                                         GtkTreePath       *path);
};

GtkTreeDragDest

typedef struct _GtkTreeDragDest GtkTreeDragDest;

struct GtkTreeDragDestIface

struct GtkTreeDragDestIface {
  /* VTable - not signals */

  gboolean     (* drag_data_received) (GtkTreeDragDest   *drag_dest,
                                       GtkTreePath       *dest,
                                       GtkSelectionData  *selection_data);

  gboolean     (* row_drop_possible)  (GtkTreeDragDest   *drag_dest,
                                       GtkTreePath       *dest_path,
				       GtkSelectionData  *selection_data);
};