| 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.MutableTransformer; | |
| 22 | ||
| 23 | /** | |
| 24 | * ViewTranslatingGraphMousePlugin uses a MouseButtonOne press and | |
| 25 | * drag gesture to translate the graph display in the x and y | |
| 26 | * direction by changing the AffineTransform applied to the Graphics2D. | |
| 27 | * The default MouseButtonOne modifier can be overridden | |
| 28 | * to cause a different mouse gesture to translate the display. | |
| 29 | * | |
| 30 | * | |
| 31 | * @author Tom Nelson | |
| 32 | */ | |
| 33 | public class ViewTranslatingGraphMousePlugin extends AbstractGraphMousePlugin | |
| 34 | implements MouseListener, MouseMotionListener { | |
| 35 | ||
| 36 | /** | |
| 37 | */ | |
| 38 | public ViewTranslatingGraphMousePlugin() { | |
| 39 | 0 | this(MouseEvent.BUTTON1_MASK); |
| 40 | 0 | } |
| 41 | ||
| 42 | /** | |
| 43 | * create an instance with passed modifer value | |
| 44 | * @param modifiers the mouse event modifier to activate this function | |
| 45 | */ | |
| 46 | public ViewTranslatingGraphMousePlugin(int modifiers) { | |
| 47 | 0 | super(modifiers); |
| 48 | 0 | this.cursor = Cursor.getPredefinedCursor(Cursor.MOVE_CURSOR); |
| 49 | 0 | } |
| 50 | ||
| 51 | /** | |
| 52 | * Check the event modifiers. Set the 'down' point for later | |
| 53 | * use. If this event satisfies the modifiers, change the cursor | |
| 54 | * to the system 'move cursor' | |
| 55 | * @param e the event | |
| 56 | */ | |
| 57 | public void mousePressed(MouseEvent e) { | |
| 58 | 0 | VisualizationViewer vv = (VisualizationViewer)e.getSource(); |
| 59 | 0 | boolean accepted = checkModifiers(e); |
| 60 | 0 | down = e.getPoint(); |
| 61 | 0 | if(accepted) { |
| 62 | 0 | vv.setCursor(cursor); |
| 63 | } | |
| 64 | 0 | } |
| 65 | ||
| 66 | /** | |
| 67 | * unset the 'down' point and change the cursoe back to the system | |
| 68 | * default cursor | |
| 69 | */ | |
| 70 | public void mouseReleased(MouseEvent e) { | |
| 71 | 0 | VisualizationViewer vv = (VisualizationViewer)e.getSource(); |
| 72 | 0 | down = null; |
| 73 | 0 | vv.setCursor(Cursor.getPredefinedCursor(Cursor.DEFAULT_CURSOR)); |
| 74 | 0 | } |
| 75 | ||
| 76 | /** | |
| 77 | * chack the modifiers. If accepted, translate the graph according | |
| 78 | * to the dragging of the mouse pointer | |
| 79 | * @param e the event | |
| 80 | */ | |
| 81 | public void mouseDragged(MouseEvent e) { | |
| 82 | 0 | VisualizationViewer vv = (VisualizationViewer)e.getSource(); |
| 83 | 0 | boolean accepted = checkModifiers(e); |
| 84 | 0 | if(accepted) { |
| 85 | 0 | MutableTransformer viewTransformer = vv.getViewTransformer(); |
| 86 | 0 | vv.setCursor(cursor); |
| 87 | try { | |
| 88 | 0 | Point2D q = viewTransformer.inverseTransform(down); |
| 89 | 0 | Point2D p = viewTransformer.inverseTransform(e.getPoint()); |
| 90 | 0 | float dx = (float) (p.getX()-q.getX()); |
| 91 | 0 | float dy = (float) (p.getY()-q.getY()); |
| 92 | ||
| 93 | 0 | viewTransformer.translate(dx, dy); |
| 94 | 0 | down.x = e.getX(); |
| 95 | 0 | down.y = e.getY(); |
| 96 | 0 | } catch(RuntimeException ex) { |
| 97 | 0 | System.err.println("down = "+down+", e = "+e); |
| 98 | 0 | throw ex; |
| 99 | 0 | } |
| 100 | ||
| 101 | 0 | e.consume(); |
| 102 | } | |
| 103 | 0 | } |
| 104 | ||
| 105 | public void mouseClicked(MouseEvent e) { | |
| 106 | // TODO Auto-generated method stub | |
| 107 | ||
| 108 | 0 | } |
| 109 | ||
| 110 | public void mouseEntered(MouseEvent e) { | |
| 111 | // TODO Auto-generated method stub | |
| 112 | ||
| 113 | 0 | } |
| 114 | ||
| 115 | public void mouseExited(MouseEvent e) { | |
| 116 | // TODO Auto-generated method stub | |
| 117 | ||
| 118 | 0 | } |
| 119 | ||
| 120 | public void mouseMoved(MouseEvent e) { | |
| 121 | // TODO Auto-generated method stub | |
| 122 | ||
| 123 | 0 | } |
| 124 | } |
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