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


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 org.eclipse.draw2d.IFigure;
31 import org.eclipse.draw2d.Locator;
32 import org.eclipse.draw2d.geometry.Dimension;
33 import org.eclipse.draw2d.geometry.Point;
34 import org.eclipse.draw2d.geometry.Rectangle;
35 import org.nightlabs.editor2d.edit.ShapeDrawComponentEditPart;
36 import org.nightlabs.editor2d.j2d.GeneralShape;
37 import org.nightlabs.editor2d.j2d.PathSegment;
38 import org.nightlabs.editor2d.util.J2DUtil;
39
40
41 public class ShapeHandleLocator
42 implements Locator
43 {
44   protected IFigure figure;
45   protected IFigure getFigure() {
46     return figure;
47   }
48
49   protected ShapeDrawComponentEditPart sdcep;
50   public GeneralShape getGeneralShape() {
51     return sdcep.getGeneralShape();
52   }
53       
54   protected int index;
55   public int getIndex() {
56     return index;
57   }
58   public void setIndex(int index) {
59     this.index = index;
60   }
61   
62   public ShapeHandleLocator(ShapeDrawComponentEditPart sdcep, int index)
63   {
64     super();
65     this.figure = sdcep.getFigure();
66     this.sdcep = sdcep;
67     this.index = index;
68   }
69   
70   protected Point getReferencePoint(IFigure target)
71   {
72     Point p = getLocation();
73     getFigure().translateToAbsolute(p);
74     target.translateToRelative(p);
75         
76     return p;
77   }
78   
79   protected Point getLocation()
80   {
81     PathSegment ps = getGeneralShape().getPathSegment(index);
82     if (ps != null) {
83       return J2DUtil.toDraw2D(ps.getPoint());
84     }
85     return new Point();
86   }
87   
88   protected IFigure getReference() {
89     return figure;
90   }
91   
92   public void relocate(IFigure target)
93   {
94     target.setLocation(calcCenterPoint(target.getBounds(), getReferencePoint(target)));
95   }
96   
97   protected Point calcCenterPoint(Rectangle rect, Point point)
98   {
99     Dimension boundsSize = rect.getSize();
100     return new Point(point.x - boundsSize.width/2, point.y - boundsSize.height/2);
101   }
102 }
103
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