1 /* ====================================================================
2 * The Apache Software License, Version 1.1
3 *
4 * Copyright (c) 2000 The Apache Software Foundation. All rights
5 * reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 *
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 *
14 * 2. Redistributions in binary form must reproduce the above copyright
15 * notice, this list of conditions and the following disclaimer in
16 * the documentation and/or other materials provided with the
17 * distribution.
18 *
19 * 3. The end-user documentation included with the redistribution,
20 * if any, must include the following acknowledgment:
21 * "This product includes software developed by the
22 * Apache Software Foundation (http://www.apache.org/)."
23 * Alternately, this acknowledgment may appear in the software itself,
24 * if and wherever such third-party acknowledgments normally appear.
25 *
26 * 4. The names "Apache" and "Apache Software Foundation" must
27 * not be used to endorse or promote products derived from this
28 * software without prior written permission. For written
29 * permission, please contact apache@apache.org.
30 *
31 * 5. Products derived from this software may not be called "Apache",
32 * nor may "Apache" appear in their name, without prior written
33 * permission of the Apache Software Foundation.
34 *
35 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
36 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
37 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
38 * DISCLAIMED. IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR
39 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
40 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
41 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
42 * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
43 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
44 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
45 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
46 * SUCH DAMAGE.
47 * ====================================================================
48 *
49 * This software consists of voluntary contributions made by many
50 * individuals on behalf of the Apache Software Foundation. For more
51 * information on the Apache Software Foundation, please see
52 * <http://www.apache.org/>.
53 *
54 * Portions of this software are based upon public domain software
55 * originally written at the National Center for Supercomputing Applications,
56 * University of Illinois, Urbana-Champaign.
57 */
58 package com.bonevich.eclipse.cvsgrapher.editors;
59
60 import com.bonevich.eclipse.cvsgrapher.model.*;
61
62 import org.eclipse.draw2d.*;
63 import org.eclipse.draw2d.geometry.Dimension;
64 import org.eclipse.draw2d.geometry.Rectangle;
65 import org.eclipse.gef.*;
66 import org.eclipse.gef.editparts.AbstractGraphicalEditPart;
67 import org.eclipse.gef.tools.MarqueeDragTracker;
68
69 import java.util.List;
70
71 /***
72 * The "root" edit part that builds a view to contain CvsGraphNodeEditParts.
73 */
74 public final class CvsGraphEditPart extends AbstractGraphicalEditPart
75 {
76 private static DragTracker _dragTracker = null;
77
78 /***
79 * @see org.eclipse.gef.editparts.AbstractGraphicalEditPart#createFigure()
80 */
81 protected IFigure createFigure()
82 {
83 Figure f = new FreeformLayer();
84 f.setLayoutManager(new CvsGraphLayout(this));
85
86 // Don't know why, but if you don't setOpaque(true), you cannot move by drag&drop!
87 f.setOpaque(true);
88 return f;
89 }
90
91 /***
92 * @see org.eclipse.gef.editparts.AbstractEditPart#createEditPolicies()
93 */
94 protected void createEditPolicies()
95 {
96 installEditPolicy(EditPolicy.LAYOUT_ROLE, new CvsGraphXYLayoutEditPolicy());
97 }
98
99 /***
100 * @see org.eclipse.gef.editparts.AbstractEditPart#getModelChildren()
101 */
102 protected List getModelChildren()
103 {
104 return ((CvsGraphModel) getModel()).getNodes();
105 }
106
107 /***
108 * This method is not mandatory to implement, but if you do not implement
109 * it, you will not have the ability to rectangle-selects several figures...
110 */
111 public DragTracker getDragTracker(Request req)
112 {
113 // Unlike in Logical Diagram Editor example, I use a singleton because this
114 // method is called several time, so I prefer to save memory ; and it works!
115 if (_dragTracker == null)
116 {
117 _dragTracker = new MarqueeDragTracker();
118 }
119 return _dragTracker;
120 }
121
122 /***
123 * Allow all child node views to expand to their preferred sizing.
124 * @see org.eclipse.gef.GraphicalEditPart#setLayoutConstraint(org.eclipse.gef.EditPart, org.eclipse.draw2d.IFigure, java.lang.Object)
125 */
126 public void setLayoutConstraint(EditPart child, IFigure node, Object constraint)
127 {
128 Rectangle rect = (Rectangle) constraint;
129 Rectangle newConstraint = new Rectangle(rect.getLocation(), new Dimension(-1,-1));
130 super.setLayoutConstraint(child, node, newConstraint);
131 }
132
133 }
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