1 /*
2 * TouchGraph LLC. Apache-Style Software License
3 *
4 *
5 * Copyright (c) 2001-2002 Alexander Shapiro. All rights 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
22 * TouchGraph LLC (http://www.touchgraph.com/)."
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 "TouchGraph" or "TouchGraph LLC" must not be used to endorse
27 * or promote products derived from this software without prior written
28 * permission. For written permission, please contact
29 * alex@touchgraph.com
30 *
31 * 5. Products derived from this software may not be called "TouchGraph",
32 * nor may "TouchGraph" appear in their name, without prior written
33 * permission of alex@touchgraph.com.
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 TOUCHGRAPH OR ITS CONTRIBUTORS BE
39 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
40 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
41 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
42 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
43 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
44 * OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
45 * EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
46 * ====================================================================
47 *
48 */
49
50 package com.touchgraph.graphlayout.interaction;
51
52 import java.awt.event.*;
53
54 import javax.swing.JScrollBar;
55
56 import com.touchgraph.graphlayout.*;
57
58 /*** ZoomScroll: Contains code for enlarging the graph by zooming in.
59 *
60 * @author Alexander Shapiro
61 * @version 1.21 $Id: ZoomScroll.java,v 1.1.1.1 2004/02/06 08:44:07 keesj Exp $
62 */
63 public class ZoomScroll implements GraphListener {
64
65 protected ZoomLens zoomLens;
66 private JScrollBar zoomSB;
67 private TGPanel tgPanel;
68
69 // ............
70
71 /*** Constructor with TGPanel <tt>tgp</tt>.
72 */
73 public ZoomScroll( TGPanel tgp ) {
74 tgPanel=tgp;
75 zoomSB = new JScrollBar(JScrollBar.HORIZONTAL, -10, 4, -31, 19);
76 zoomSB.addAdjustmentListener(new zoomAdjustmentListener());
77 zoomLens=new ZoomLens();
78 tgPanel.addGraphListener(this);
79 }
80
81 public JScrollBar getZoomSB() { return zoomSB; }
82
83 public ZoomLens getLens() { return zoomLens; }
84
85 public void graphMoved() {} //From GraphListener interface
86 public void graphReset() { zoomSB.setValue(-10); } //From GraphListener interface
87
88 public int getZoomValue() {
89 double orientedValue = zoomSB.getValue()-zoomSB.getMinimum();
90 double range = zoomSB.getMaximum()-zoomSB.getMinimum()-zoomSB.getVisibleAmount();
91 return (int) ((orientedValue/range)*200-100);
92 }
93
94 public void setZoomValue(int value) {
95 double range = zoomSB.getMaximum()-zoomSB.getMinimum()-zoomSB.getVisibleAmount();
96 zoomSB.setValue((int) ((value+100)/200.0 * range+0.5)+zoomSB.getMinimum());
97 }
98
99 private class zoomAdjustmentListener implements AdjustmentListener {
100 public void adjustmentValueChanged(AdjustmentEvent e) {
101 tgPanel.repaintAfterMove();
102 }
103 }
104
105 class ZoomLens extends TGAbstractLens {
106 protected void applyLens(TGPoint2D p) {
107 p.x=p.x*Math.pow(2,zoomSB.getValue()/10.0);
108 p.y=p.y*Math.pow(2,zoomSB.getValue()/10.0);
109
110 }
111
112 protected void undoLens(TGPoint2D p) {
113 p.x=p.x/Math.pow(2,zoomSB.getValue()/10.0);
114 p.y=p.y/Math.pow(2,zoomSB.getValue()/10.0);
115 }
116 }
117
118 } // end com.touchgraph.graphlayout.interaction.ZoomScroll