| 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.Cursor; | |
| 15 | import java.awt.event.MouseEvent; | |
| 16 | import java.awt.event.MouseListener; | |
| 17 | import java.awt.event.MouseMotionListener; | |
| 18 | import java.awt.geom.Point2D; | |
| 19 | ||
| 20 | import edu.uci.ics.jung.visualization.VisualizationViewer; | |
| 21 | import edu.uci.ics.jung.visualization.transform.LensTransformer; | |
| 22 | import edu.uci.ics.jung.visualization.transform.MutableTransformer; | |
| 23 | ||
| 24 | /** | |
| 25 | * Extends TranslatingGraphMousePlugin and adds the capability | |
| 26 | * to drag and resize the viewing | |
| 27 | * lens in the graph view. Mouse1 in the center moves the lens, | |
| 28 | * mouse1 on the edge resizes the lens. The default mouse button and | |
| 29 | * modifiers can be overridden in the constructor. | |
| 30 | * | |
| 31 | * | |
| 32 | * @author Tom Nelson | |
| 33 | */ | |
| 34 | public class LensTranslatingGraphMousePlugin extends TranslatingGraphMousePlugin | |
| 35 | implements MouseListener, MouseMotionListener { | |
| 36 | ||
| 37 | protected boolean dragOnLens; | |
| 38 | protected boolean dragOnEdge; | |
| 39 | protected double edgeOffset; | |
| 40 | /** | |
| 41 | * create an instance with default modifiers | |
| 42 | */ | |
| 43 | public LensTranslatingGraphMousePlugin() { | |
| 44 | 0 | this(MouseEvent.BUTTON1_MASK); |
| 45 | 0 | } |
| 46 | ||
| 47 | /** | |
| 48 | * create an instance with passed modifer value | |
| 49 | * @param modifiers the mouse event modifier to activate this function | |
| 50 | */ | |
| 51 | public LensTranslatingGraphMousePlugin(int modifiers) { | |
| 52 | 0 | super(modifiers); |
| 53 | 0 | } |
| 54 | ||
| 55 | /** | |
| 56 | * Check the event modifiers. Set the 'down' point for later | |
| 57 | * use. If this event satisfies the modifiers, change the cursor | |
| 58 | * to the system 'move cursor' | |
| 59 | * @param e the event | |
| 60 | */ | |
| 61 | public void mousePressed(MouseEvent e) { | |
| 62 | 0 | VisualizationViewer vv = (VisualizationViewer)e.getSource(); |
| 63 | 0 | boolean accepted = checkModifiers(e); |
| 64 | 0 | if(accepted) { |
| 65 | 0 | vv.setCursor(Cursor.getPredefinedCursor(Cursor.MOVE_CURSOR)); |
| 66 | 0 | testViewCenter(vv.getLayoutTransformer(), e.getPoint()); |
| 67 | 0 | testViewCenter(vv.getViewTransformer(), e.getPoint()); |
| 68 | 0 | vv.repaint(); |
| 69 | } | |
| 70 | 0 | super.mousePressed(e); |
| 71 | 0 | } |
| 72 | ||
| 73 | /** | |
| 74 | * called to change the location of the lens | |
| 75 | * @param transformer | |
| 76 | * @param point | |
| 77 | */ | |
| 78 | private void setViewCenter(MutableTransformer transformer, Point2D point) { | |
| 79 | 0 | if(transformer instanceof LensTransformer) { |
| 80 | 0 | LensTransformer ht = |
| 81 | (LensTransformer)transformer; | |
| 82 | 0 | ht.setViewCenter(point); |
| 83 | } | |
| 84 | 0 | } |
| 85 | ||
| 86 | /** | |
| 87 | * called to change the radius of the lens | |
| 88 | * @param transformer | |
| 89 | * @param point | |
| 90 | */ | |
| 91 | private void setViewRadius(MutableTransformer transformer, Point2D point) { | |
| 92 | 0 | if(transformer instanceof LensTransformer) { |
| 93 | 0 | LensTransformer ht = |
| 94 | (LensTransformer)transformer; | |
| 95 | 0 | double distanceFromCenter = ht.getDistanceFromCenter(point); |
| 96 | 0 | ht.setViewRadius(distanceFromCenter+edgeOffset); |
| 97 | } | |
| 98 | 0 | } |
| 99 | ||
| 100 | /** | |
| 101 | * called to set up translating the lens center or changing the size | |
| 102 | * @param transformer | |
| 103 | * @param point | |
| 104 | */ | |
| 105 | private void testViewCenter(MutableTransformer transformer, Point2D point) { | |
| 106 | 0 | if(transformer instanceof LensTransformer) { |
| 107 | 0 | LensTransformer ht = |
| 108 | (LensTransformer)transformer; | |
| 109 | 0 | double distanceFromCenter = ht.getDistanceFromCenter(point); |
| 110 | 0 | if(distanceFromCenter < 10) { |
| 111 | 0 | ht.setViewCenter(point); |
| 112 | 0 | dragOnLens = true; |
| 113 | 0 | } else if(Math.abs(distanceFromCenter - ht.getViewRadius()) < 10) { |
| 114 | 0 | edgeOffset = ht.getViewRadius() - distanceFromCenter; |
| 115 | 0 | ht.setViewRadius(distanceFromCenter+edgeOffset); |
| 116 | 0 | dragOnEdge = true; |
| 117 | } | |
| 118 | } | |
| 119 | 0 | } |
| 120 | ||
| 121 | /** | |
| 122 | * unset the 'down' point and change the cursoe back to the system | |
| 123 | * default cursor | |
| 124 | */ | |
| 125 | public void mouseReleased(MouseEvent e) { | |
| 126 | 0 | super.mouseReleased(e); |
| 127 | 0 | dragOnLens = false; |
| 128 | 0 | dragOnEdge = false; |
| 129 | 0 | edgeOffset = 0; |
| 130 | 0 | } |
| 131 | ||
| 132 | /** | |
| 133 | * check the modifiers. If accepted, move or resize the lens according | |
| 134 | * to the dragging of the mouse pointer | |
| 135 | * @param e the event | |
| 136 | */ | |
| 137 | public void mouseDragged(MouseEvent e) { | |
| 138 | 0 | VisualizationViewer vv = (VisualizationViewer)e.getSource(); |
| 139 | 0 | boolean accepted = checkModifiers(e); |
| 140 | 0 | if(accepted ) { |
| 141 | 0 | MutableTransformer modelTransformer = vv.getLayoutTransformer(); |
| 142 | 0 | vv.setCursor(Cursor.getPredefinedCursor(Cursor.MOVE_CURSOR)); |
| 143 | ||
| 144 | 0 | if(dragOnLens) { |
| 145 | ||
| 146 | 0 | setViewCenter(modelTransformer, vv.inverseViewTransform(e.getPoint())); |
| 147 | 0 | setViewCenter(vv.getViewTransformer(), e.getPoint()); |
| 148 | 0 | e.consume(); |
| 149 | 0 | vv.repaint(); |
| 150 | ||
| 151 | 0 | } else if(dragOnEdge) { |
| 152 | ||
| 153 | 0 | setViewRadius(modelTransformer, e.getPoint()); |
| 154 | 0 | setViewRadius(vv.getViewTransformer(), e.getPoint()); |
| 155 | 0 | e.consume(); |
| 156 | 0 | vv.repaint(); |
| 157 | ||
| 158 | } else { | |
| 159 | 0 | super.mouseDragged(e); |
| 160 | } | |
| 161 | } | |
| 162 | 0 | } |
| 163 | } |
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this report was generated by version 1.0.5 of jcoverage. |
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