1/*
2* Copyright (c) 2018 (https://github.com/phase1geo/Minder)
3*
4* This program is free software; you can redistribute it and/or
5* modify it under the terms of the GNU General Public
6* License as published by the Free Software Foundation; either
7* version 2 of the License, or (at your option) any later version.
8*
9* This program is distributed in the hope that it will be useful,
10* but WITHOUT ANY WARRANTY; without even the implied warranty of
11* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
12* General Public License for more details.
13*
14* You should have received a copy of the GNU General Public
15* License along with this program; if not, write to the
16* Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
17* Boston, MA 02110-1301 USA
18*
19* Authored by: Trevor Williams <phase1geo@gmail.com>
20*/
21
22using Gtk;
23
24public class UndoNodeImage : UndoItem {
25
26  Node       _node;
27  NodeImage? _old_image;
28  NodeImage? _new_image;
29
30  /* Constructor for a node name change */
31  public UndoNodeImage( Node n, NodeImage? old_image ) {
32    base( _( "node image change" ) );
33    _node      = n;
34    _old_image = old_image;
35    _new_image = n.image;
36  }
37
38  /* Changes the node image, adjusts the layout and updates the UI */
39  private void change( DrawArea da, NodeImage? img ) {
40    _node.set_image( da.image_manager, img );
41    da.queue_draw();
42    da.current_changed( da );
43    da.auto_save();
44  }
45
46  /* Undoes a node image change */
47  public override void undo( DrawArea da ) {
48    change( da, _old_image );
49  }
50
51  /* Redoes a node image change */
52  public override void redo( DrawArea da ) {
53    change( da, _new_image );
54  }
55
56}
57