KickJava   Java API By Example, From Geeks To Geeks.

Java > Open Source Codes > org > nightlabs > editor2d > handle > AbstractMultipleLocator


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.handle;
29
30 import java.util.List JavaDoc;
31
32 import org.eclipse.draw2d.IFigure;
33 import org.eclipse.draw2d.Locator;
34 import org.eclipse.draw2d.geometry.Dimension;
35 import org.eclipse.draw2d.geometry.Point;
36 import org.eclipse.draw2d.geometry.Rectangle;
37 import org.eclipse.gef.GraphicalEditPart;
38
39
40 public abstract class AbstractMultipleLocator
41 implements Locator
42 {
43   protected List JavaDoc editParts;
44   protected IFigure figure;
45   public AbstractMultipleLocator(List JavaDoc editParts)
46   {
47     super();
48     this.editParts = editParts;
49     this.figure = ((GraphicalEditPart)editParts.get(0)).getFigure();
50   }
51
52   public void relocate(IFigure target)
53   {
54 // target.setLocation(calcCenterPoint(target.getBounds(), getLocation()));
55 target.setLocation(calcCenterPoint(target.getBounds(), getConstrainedPoint(target)));
56   }
57   
58   protected abstract Point getLocation();
59   
60   protected Point calcCenterPoint(Rectangle rect, Point point)
61   {
62     Dimension boundsSize = rect.getSize();
63     return new Point(point.x - boundsSize.width/2, point.y - boundsSize.height/2);
64   }
65   
66   protected Point getConstrainedPoint(IFigure target)
67   {
68     Point p = getLocation();
69     figure.translateToAbsolute(p);
70     target.translateToRelative(p);
71     return p;
72   }
73 }
74
Popular Tags