| 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; | |
| 13 | ||
| 14 | import java.awt.event.MouseAdapter; | |
| 15 | import java.awt.event.MouseEvent; | |
| 16 | import java.awt.event.MouseWheelEvent; | |
| 17 | import java.awt.geom.Point2D; | |
| 18 | ||
| 19 | import javax.swing.SwingUtilities; | |
| 20 | ||
| 21 | import edu.uci.ics.jung.graph.Edge; | |
| 22 | import edu.uci.ics.jung.graph.Vertex; | |
| 23 | ||
| 24 | /** | |
| 25 | * SimpleGraphMouse is the original GraphMouse class that was | |
| 26 | * nested in VisualizationViewer and installed as a listener | |
| 27 | * for mouse events and mouse motion events. Users can restore | |
| 28 | * previous capability by creating an instance of this class | |
| 29 | * and using VisualizationViewer.setGraphMouse() to re-install it. | |
| 30 | * Changes in this code from the nested version are mainly those | |
| 31 | * necessary to move it outside the VisualizationViewer class, | |
| 32 | * and to properly handle the transform values of the VisualizationViewer | |
| 33 | * (the zoom and pan) | |
| 34 | * | |
| 35 | * | |
| 36 | */ | |
| 37 | public class SimpleGraphMouse extends MouseAdapter | |
| 38 | implements VisualizationViewer.GraphMouse { | |
| 39 | ||
| 40 | /** | |
| 41 | * the VisualizationViewer who's mouse events call these | |
| 42 | * methods. | |
| 43 | */ | |
| 44 | protected VisualizationViewer vv; | |
| 45 | ||
| 46 | /** | |
| 47 | * how far the mouse point x is from the vertex center x | |
| 48 | */ | |
| 49 | protected float offsetx; | |
| 50 | ||
| 51 | /** | |
| 52 | * how far the mouse point y is from the vertex center y | |
| 53 | */ | |
| 54 | protected float offsety; | |
| 55 | ||
| 56 | /** | |
| 57 | * the vertex to drag with a mouseDragged operation | |
| 58 | */ | |
| 59 | protected Vertex vertexToDrag; | |
| 60 | ||
| 61 | /** | |
| 62 | * create an instance for the passed VisualizationViewer | |
| 63 | * @param vv | |
| 64 | */ | |
| 65 | 0 | public SimpleGraphMouse(VisualizationViewer vv) { |
| 66 | 0 | this.vv = vv; |
| 67 | 0 | } |
| 68 | ||
| 69 | /** | |
| 70 | * Uses the layout class to attempt to pick a vertex in | |
| 71 | * the graph. | |
| 72 | */ | |
| 73 | public void mousePressed(MouseEvent e) { | |
| 74 | 0 | PickSupport pickSupport = vv.getPickSupport(); |
| 75 | 0 | PickedState pickedState = vv.getPickedState(); |
| 76 | ||
| 77 | 0 | if(pickSupport != null && pickedState != null) { |
| 78 | 0 | Layout layout = vv.getGraphLayout(); |
| 79 | 0 | if(SwingUtilities.isLeftMouseButton(e)) { |
| 80 | // p is the screen point for the mouse event | |
| 81 | 0 | Point2D p = e.getPoint(); |
| 82 | // transform it to graph coordinates: | |
| 83 | 0 | Point2D gp = vv.inverseTransform(p); |
| 84 | ||
| 85 | 0 | Vertex v = pickSupport.getVertex(gp.getX(), gp.getY()); |
| 86 | 0 | if(v != null) { |
| 87 | 0 | pickedState.clearPickedVertices(); |
| 88 | 0 | pickedState.pick(v, true); |
| 89 | 0 | vertexToDrag = v; |
| 90 | // layout.getLocation applies the layout transformer so | |
| 91 | // q is transformed by the layout transformer only | |
| 92 | 0 | Point2D q = layout.getLocation(v); |
| 93 | // i need to put it back in the graph coordinates: | |
| 94 | 0 | Point2D gq = vv.getLayoutTransformer().inverseTransform(q); |
| 95 | 0 | offsetx = (float) (gp.getX()-gq.getX()); |
| 96 | 0 | offsety = (float) (gp.getY()-gq.getY()); |
| 97 | } else { | |
| 98 | 0 | Edge edge = pickSupport.getEdge(gp.getX(), gp.getY()); |
| 99 | 0 | if(edge != null) { |
| 100 | 0 | pickedState.clearPickedEdges(); |
| 101 | 0 | pickedState.pick(edge, true); |
| 102 | } | |
| 103 | } | |
| 104 | 0 | vv.repaint(); |
| 105 | ||
| 106 | 0 | } else if(SwingUtilities.isMiddleMouseButton(e)) { |
| 107 | 0 | Point2D p = vv.inverseTransform(e.getPoint()); |
| 108 | 0 | Vertex v = pickSupport.getVertex(p.getX(), p.getY()); |
| 109 | 0 | if(v != null) { |
| 110 | 0 | boolean wasThere = pickedState.pick(v, !pickedState.isPicked(v)); |
| 111 | 0 | if(wasThere) { |
| 112 | 0 | vertexToDrag = null; |
| 113 | } else { | |
| 114 | 0 | vertexToDrag = v; |
| 115 | 0 | Point2D point = vv.getLayoutTransformer().inverseTransform(layout.getLocation(v)); |
| 116 | 0 | offsetx = (float) (p.getX()-point.getX()); |
| 117 | 0 | offsety = (float) (p.getY()-point.getY()); |
| 118 | // } | |
| 119 | } | |
| 120 | } else { | |
| 121 | 0 | Edge edge = pickSupport.getEdge(p.getX(), p.getY()); |
| 122 | 0 | if(edge != null) { |
| 123 | 0 | pickedState.pick(edge, !pickedState.isPicked(edge)); |
| 124 | } | |
| 125 | } | |
| 126 | 0 | vv.repaint(); |
| 127 | } | |
| 128 | } | |
| 129 | 0 | } |
| 130 | ||
| 131 | ||
| 132 | /** | |
| 133 | * clean up after the pick of a Vertex or Edge | |
| 134 | */ | |
| 135 | public void mouseReleased(MouseEvent e) { | |
| 136 | 0 | vertexToDrag = null; |
| 137 | 0 | } |
| 138 | ||
| 139 | /** | |
| 140 | * if a Vertex was picked in the mousePressed method, use the | |
| 141 | * layout class to force that Vertex to move, following the | |
| 142 | * motion of the mouse. | |
| 143 | */ | |
| 144 | public void mouseDragged(MouseEvent e) { | |
| 145 | 0 | if (vertexToDrag != null) { |
| 146 | 0 | Point2D p = vv.inverseTransform(e.getPoint()); |
| 147 | 0 | Layout layout = vv.getGraphLayout(); |
| 148 | 0 | layout.forceMove(vertexToDrag, p.getX()-offsetx, p.getY()-offsety); |
| 149 | 0 | vv.repaint(); |
| 150 | } | |
| 151 | 0 | } |
| 152 | ||
| 153 | /** | |
| 154 | * no-op here | |
| 155 | */ | |
| 156 | public void mouseMoved(MouseEvent e) { | |
| 157 | 0 | return; |
| 158 | } | |
| 159 | ||
| 160 | /** | |
| 161 | * no-op here | |
| 162 | */ | |
| 163 | public void mouseWheelMoved(MouseWheelEvent e) { | |
| 164 | 0 | return; |
| 165 | } | |
| 166 | } | |
| 167 |
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