| Line | Hits | Source |
|---|---|---|
| 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 | } |
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this report was generated by version 1.0.5 of jcoverage. |
copyright © 2003, jcoverage ltd. all rights reserved. |