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1 | /* | |
2 | * Copyright (c) 2005, the JUNG Project and the Regents of the University | |
3 | * of California | |
4 | * All rights reserved. | |
5 | * | |
6 | * This software is open-source under the BSD license; see either | |
7 | * "license.txt" or | |
8 | * http://jung.sourceforge.net/license.txt for a description. | |
9 | * Created on Mar 8, 2005 | |
10 | * | |
11 | */ | |
12 | package edu.uci.ics.jung.visualization.control; | |
13 | ||
14 | import java.awt.BasicStroke; | |
15 | import java.awt.Color; | |
16 | import java.awt.Cursor; | |
17 | import java.awt.Dimension; | |
18 | import java.awt.Graphics2D; | |
19 | import java.awt.Point; | |
20 | import java.awt.RenderingHints; | |
21 | import java.awt.Toolkit; | |
22 | import java.awt.event.MouseEvent; | |
23 | import java.awt.event.MouseListener; | |
24 | import java.awt.event.MouseMotionListener; | |
25 | import java.awt.geom.Point2D; | |
26 | import java.awt.image.BufferedImage; | |
27 | import java.util.Collections; | |
28 | ||
29 | import edu.uci.ics.jung.visualization.VisualizationViewer; | |
30 | import edu.uci.ics.jung.visualization.transform.MutableTransformer; | |
31 | ||
32 | /** | |
33 | * RotatingGraphMouse provides the abiity to rotate the graph using | |
34 | * the mouse. By default, it is activated by mouse button one drag | |
35 | * with the shift key pressed. The modifiers can be overridden so that | |
36 | * a different mouse/key combination activates the rotation | |
37 | * | |
38 | * @author Tom Nelson | |
39 | */ | |
40 | public class RotatingGraphMousePlugin extends AbstractGraphMousePlugin | |
41 | implements MouseListener, MouseMotionListener { | |
42 | ||
43 | /** | |
44 | * create an instance with default modifier values | |
45 | */ | |
46 | public RotatingGraphMousePlugin() { | |
47 | 0 | this(MouseEvent.BUTTON1_MASK | MouseEvent.SHIFT_MASK); |
48 | 0 | } |
49 | ||
50 | /** | |
51 | * create an instance with passed zoom in/out values | |
52 | * @param modifiers the event modifiers to trigger rotation | |
53 | */ | |
54 | public RotatingGraphMousePlugin(int modifiers) { | |
55 | 0 | super(modifiers); |
56 | 0 | Dimension cd = Toolkit.getDefaultToolkit().getBestCursorSize(16,16); |
57 | 0 | BufferedImage cursorImage = |
58 | new BufferedImage(cd.width,cd.height,BufferedImage.TYPE_INT_ARGB); | |
59 | 0 | Graphics2D g = cursorImage.createGraphics(); |
60 | 0 | g.addRenderingHints(Collections.singletonMap(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON)); |
61 | 0 | g.setColor(new Color(0,0,0,0)); |
62 | 0 | g.fillRect(0,0,16,16); |
63 | ||
64 | 0 | g.setColor(Color.white); |
65 | 0 | g.setStroke(new BasicStroke(3)); |
66 | 0 | int left = 0; |
67 | 0 | int top = 0; |
68 | 0 | int right = 15; |
69 | 0 | int bottom = 15; |
70 | ||
71 | 0 | g.setColor(Color.black); |
72 | 0 | g.setStroke(new BasicStroke(1)); |
73 | // top bent line | |
74 | 0 | g.drawLine(left+2,top+6,right/2+1,top); |
75 | 0 | g.drawLine(right/2+1,top,right-2,top+5); |
76 | // bottom bent line | |
77 | 0 | g.drawLine(left+2,bottom-6,right/2,bottom); |
78 | 0 | g.drawLine(right/2,bottom,right-2,bottom-6); |
79 | // top arrow | |
80 | 0 | g.drawLine(left+2,top+6,left+5,top+6); |
81 | 0 | g.drawLine(left+2,top+6,left+2,top+3); |
82 | // bottom arrow | |
83 | 0 | g.drawLine(right-2,bottom-6,right-6,bottom-6); |
84 | 0 | g.drawLine(right-2, bottom-6,right-2,bottom-3); |
85 | ||
86 | 0 | g.dispose(); |
87 | ||
88 | 0 | cursor = Toolkit.getDefaultToolkit().createCustomCursor(cursorImage, new Point(), "RotateCursor"); |
89 | 0 | } |
90 | ||
91 | /** | |
92 | * save the 'down' point and check the modifiers. If the | |
93 | * modifiers are accepted, set the cursor to the 'hand' cursor | |
94 | * @param e the event | |
95 | */ | |
96 | public void mousePressed(MouseEvent e) { | |
97 | 0 | VisualizationViewer vv = (VisualizationViewer)e.getSource(); |
98 | 0 | boolean accepted = checkModifiers(e); |
99 | 0 | down = e.getPoint(); |
100 | 0 | if(accepted) { |
101 | 0 | vv.setCursor(cursor); |
102 | } | |
103 | 0 | } |
104 | ||
105 | /** | |
106 | * unset the down point and change the cursor back to the default | |
107 | */ | |
108 | public void mouseReleased(MouseEvent e) { | |
109 | 0 | VisualizationViewer vv = (VisualizationViewer)e.getSource(); |
110 | 0 | down = null; |
111 | 0 | vv.setCursor(Cursor.getPredefinedCursor(Cursor.DEFAULT_CURSOR)); |
112 | 0 | } |
113 | ||
114 | /** | |
115 | * check the modifiers. If accepted, use the mouse drag motion | |
116 | * to rotate the graph | |
117 | */ | |
118 | public void mouseDragged(MouseEvent e) { | |
119 | 0 | if(down == null) return; |
120 | 0 | VisualizationViewer vv = (VisualizationViewer)e.getSource(); |
121 | 0 | boolean accepted = checkModifiers(e); |
122 | 0 | if(accepted) { |
123 | 0 | MutableTransformer modelTransformer = |
124 | vv.getLayoutTransformer(); | |
125 | // rotate | |
126 | 0 | vv.setCursor(cursor); |
127 | ||
128 | 0 | Point2D center = vv.getCenter(); |
129 | 0 | Point2D q = down; |
130 | 0 | Point2D p = e.getPoint(); |
131 | 0 | Point2D v1 = new Point2D.Double(center.getX()-p.getX(), center.getY()-p.getY()); |
132 | 0 | Point2D v2 = new Point2D.Double(center.getX()-q.getX(), center.getY()-q.getY()); |
133 | 0 | double theta = angleBetween(v1, v2); |
134 | 0 | modelTransformer.rotate(theta, vv.inverseViewTransform(center)); |
135 | 0 | down.x = e.getX(); |
136 | 0 | down.y = e.getY(); |
137 | ||
138 | 0 | e.consume(); |
139 | } | |
140 | 0 | } |
141 | ||
142 | /** | |
143 | * Returns the angle between two vectors from the origin | |
144 | * to points v1 and v2. | |
145 | * @param v1 | |
146 | * @param v2 | |
147 | * @return | |
148 | */ | |
149 | protected double angleBetween(Point2D v1, Point2D v2) { | |
150 | 0 | double x1 = v1.getX(); |
151 | 0 | double y1 = v1.getY(); |
152 | 0 | double x2 = v2.getX(); |
153 | 0 | double y2 = v2.getY(); |
154 | // cross product for direction | |
155 | 0 | double cross = x1*y2 - x2*y1; |
156 | 0 | int cw = 1; |
157 | 0 | if(cross > 0) { |
158 | 0 | cw = -1; |
159 | } | |
160 | // dot product for angle | |
161 | 0 | double angle = |
162 | cw*Math.acos( ( x1*x2 + y1*y2 ) / | |
163 | ( Math.sqrt( x1*x1 + y1*y1 ) * | |
164 | Math.sqrt( x2*x2 + y2*y2 ) ) ); | |
165 | 0 | if(Double.isNaN(angle)) { |
166 | 0 | angle = 0; |
167 | } | |
168 | 0 | return angle; |
169 | } | |
170 | ||
171 | public void mouseClicked(MouseEvent e) { | |
172 | 0 | } |
173 | ||
174 | public void mouseEntered(MouseEvent e) { | |
175 | 0 | } |
176 | ||
177 | public void mouseExited(MouseEvent e) { | |
178 | 0 | } |
179 | ||
180 | public void mouseMoved(MouseEvent e) { | |
181 | 0 | } |
182 | } |
this report was generated by version 1.0.5 of jcoverage. |
copyright © 2003, jcoverage ltd. all rights reserved. |