Big TreeView DnD fixage, makes drops on empty models work, makes TreeStore

Big TreeView DnD fixage, makes drops on empty models work, makes TreeStore

Wed Sep 10 01:06:44 2003  Kristian Rietveld  <kris@gtk.org>

	Big TreeView DnD fixage, makes drops on empty models work, makes
	TreeStore DnD work and gets rid of gtk-tree-model-drop-append.
	Related bugs #95362 and #113314. I don't want to touch this code
	ever again.

	* gtk/gtktreeprivate.h (GtkTreePrivate): add empty_view_drop field.

	* gtk/gtktreednd.c (gtk_tree_get_row_drag_data): add check
	for selection_data->length.

	* gtk/gtktreeview.c (struct DestRow), (dest_row_free),
	(set_dest_row), (get_dest_row): we don't store just the row ref
	anymore, but a struct with the row ref and additional info,
	(set_destination_row): handle drops on empty space and some
	style fixes,
	(get_logical_dest_row): also return path_down_mode/drop_append_mode
	flags, handle dropping childs on their new parents, rewrite
	drop append handling into something saner,
	(gtk_tree_view_drag_motion): show a "drop possible arrow" on empty
	spaces,
	(gtk_tree_view_drag_drop): updates for updated backend,
	(gtk_tree_view_drag_data_received): updates for updated backend,
	path down mode (treestore DnD) handling,
	(gtk_tree_view_set_drag_dest_row): set empty_view_drop flag,
	when we are trying to drop a row on an empty model,
	(gtk_tree_view_get_drag_dest_row): handle empty_view_drop flag.

	* gtk/gtkliststore.c (gtk_list_store_drag_data_received),
	(gtk_list_store_row_drop_possible): style and drop-append fixes.

	* gtk/gtktreestore.c (gtk_tree_store_drag_data_received): ditto.