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Java > Open Source Codes > org > nightlabs > editor2d > command > DeleteGuideCommand


1 /* *****************************************************************************
2  * NightLabs Editor2D - Graphical editor framework *
3  * Copyright (C) 2004-2005 NightLabs - http://NightLabs.org *
4  * Project author: Daniel Mazurek <Daniel.Mazurek [at] nightlabs [dot] org> *
5  * *
6  * This library is free software; you can redistribute it and/or *
7  * modify it under the terms of the GNU Lesser General Public *
8  * License as published by the Free Software Foundation; either *
9  * version 2.1 of the License, or (at your option) any later version. *
10  * *
11  * This library is distributed in the hope that it will be useful, *
12  * but WITHOUT ANY WARRANTY; without even the implied warranty of *
13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU *
14  * Lesser General Public License for more details. *
15  * *
16  * You should have received a copy of the GNU Lesser General Public *
17  * License along with this library; if not, write to the *
18  * Free Software Foundation, Inc., *
19  * 51 Franklin St, Fifth Floor, *
20  * Boston, MA 02110-1301 USA *
21  * *
22  * Or get it online : *
23  * http://www.gnu.org/copyleft/lesser.html *
24  * *
25  * *
26  ******************************************************************************/
27
28 package org.nightlabs.editor2d.command;
29
30 import java.util.HashMap JavaDoc;
31 import java.util.Iterator JavaDoc;
32 import java.util.Map JavaDoc;
33
34 import org.eclipse.gef.commands.Command;
35
36 import org.nightlabs.editor2d.DrawComponent;
37 import org.nightlabs.editor2d.EditorGuide;
38 import org.nightlabs.editor2d.EditorPlugin;
39 import org.nightlabs.editor2d.EditorRuler;
40
41 public class DeleteGuideCommand
42 extends Command
43 {
44   private EditorRuler parent;
45   private EditorGuide guide;
46   private Map JavaDoc oldParts;
47
48   public DeleteGuideCommand(EditorGuide guide, EditorRuler parent) {
49     super(EditorPlugin.getResourceString("command.delete.guide"));
50     this.guide = guide;
51     this.parent = parent;
52   }
53
54   public boolean canUndo() {
55     return true;
56   }
57
58   public void execute()
59   {
60     oldParts = new HashMap JavaDoc(guide.getMap());
61     Iterator JavaDoc iter = oldParts.keySet().iterator();
62     while (iter.hasNext()) {
63         guide.detachPart((DrawComponent)iter.next());
64     }
65     parent.removeGuide(guide);
66   }
67   
68   public void undo()
69   {
70     parent.addGuide(guide);
71     Iterator JavaDoc iter = oldParts.keySet().iterator();
72     while (iter.hasNext()) {
73       DrawComponent part = (DrawComponent)iter.next();
74         guide.attachPart(part, ((Integer JavaDoc)oldParts.get(part)).intValue());
75     }
76   }
77       
78 }
79
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