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1   /**********************************************
2    * Copyright (C) 2009 Lukas Laag
3    * This file is part of Vectomatic.
4    * 
5    * Vectomatic is free software: you can redistribute it and/or modify
6    * it under the terms of the GNU General Public License as published by
7    * the Free Software Foundation, either version 3 of the License, or
8    * (at your option) any later version.
9    * 
10   * Vectomatic is distributed in the hope that it will be useful,
11   * but WITHOUT ANY WARRANTY; without even the implied warranty of
12   * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
13   * GNU General Public License for more details.
14   * 
15   * You should have received a copy of the GNU General Public License
16   * along with Vectomatic.  If not, see http://www.gnu.org/licenses/
17   **********************************************/
18  package org.vectomatic.client.rep.controller;
19  
20  import org.vectomatic.client.rep.RepApplication;
21  import org.vectomatic.client.rep.command.GroupCommand;
22  import org.vectomatic.client.rep.events.IShapeSelectionListener;
23  import org.vectomatic.client.rep.view.DrawingView;
24  
25  import com.google.gwt.user.client.ui.MenuItem;
26  
27  /**
28   * Controller to respond to grouping requests and turn
29   * them into GroupCommand
30   */
31  public class GroupController extends ControllerBase implements IShapeSelectionListener {
32  	private ControllerMenuItem _groupMenuItem;
33  	private ControllerContextItem _groupContextItem;
34  
35  	public GroupController(RepApplication app) {
36  		super(app);
37  		_app.getSelection().addShapeSelectionListener(this);
38  		_groupMenuItem = new ControllerMenuItem(_app.getView(), app.getConstants().groupCommand(), this);
39  		_groupContextItem = new ControllerContextItem(_app.getView(), app.getConstants().groupCommand(), this);
40  		selectionChanged(_app.getSelection());
41  	}
42  
43  	@Override
44  	public void activate(DrawingView view) {
45  		GroupCommand groupCommand = new GroupCommand(_app);
46  		groupCommand.execute();
47  		_app.getHistory().addCommand(groupCommand);
48  	}
49  
50  	public void selectionChanged(ShapeSelection selection) {
51  		_groupMenuItem.setEnabled((selection.getSelectedShapes().size() > 1));
52  	}
53  
54  	public MenuItem getGroupMenuItem() {
55  		return _groupMenuItem;
56  	}
57  
58  	public MenuItem getGroupContextItem() {
59  		return _groupContextItem;
60  	}
61  }