| 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.event.MouseEvent; | |
| 15 | import java.awt.event.MouseWheelEvent; | |
| 16 | import java.awt.event.MouseWheelListener; | |
| 17 | import java.awt.geom.Point2D; | |
| 18 | ||
| 19 | import edu.uci.ics.jung.visualization.VisualizationViewer; | |
| 20 | ||
| 21 | /** | |
| 22 | * ScalingGraphMouse applies a scaling transformation to the graph layout. | |
| 23 | * The Vertices get closer or farther apart, but do not themselves change | |
| 24 | * size. ScalingGraphMouse uses MouseWheelEvents to apply the scaling. | |
| 25 | * | |
| 26 | * @author Tom Nelson | |
| 27 | */ | |
| 28 | public class ScalingGraphMousePlugin extends AbstractGraphMousePlugin | |
| 29 | implements MouseWheelListener { | |
| 30 | ||
| 31 | /** | |
| 32 | * the amount to zoom in by | |
| 33 | */ | |
| 34 | 0 | protected float in = 1.1f; |
| 35 | /** | |
| 36 | * the amount to zoom out by | |
| 37 | */ | |
| 38 | 0 | protected float out = 1/1.1f; |
| 39 | ||
| 40 | /** | |
| 41 | * whether to center the zoom at the current mouse position | |
| 42 | */ | |
| 43 | 0 | protected boolean zoomAtMouse = true; |
| 44 | ||
| 45 | /** | |
| 46 | * controls scaling operations | |
| 47 | */ | |
| 48 | protected ScalingControl scaler; | |
| 49 | ||
| 50 | public ScalingGraphMousePlugin(ScalingControl scaler, int modifiers) { | |
| 51 | 0 | this(scaler, modifiers, 1.1f, 1/1.1f); |
| 52 | 0 | } |
| 53 | ||
| 54 | public ScalingGraphMousePlugin(ScalingControl scaler, int modifiers, float in, float out) { | |
| 55 | 0 | super(modifiers); |
| 56 | 0 | this.scaler = scaler; |
| 57 | 0 | this.in = in; |
| 58 | 0 | this.out = out; |
| 59 | 0 | } |
| 60 | /** | |
| 61 | * @param zoomAtMouse The zoomAtMouse to set. | |
| 62 | */ | |
| 63 | public void setZoomAtMouse(boolean zoomAtMouse) { | |
| 64 | 0 | this.zoomAtMouse = zoomAtMouse; |
| 65 | 0 | } |
| 66 | ||
| 67 | public boolean checkModifiers(MouseEvent e) { | |
| 68 | 0 | return e.getModifiers() == modifiers || (e.getModifiers() & modifiers) != 0; |
| 69 | } | |
| 70 | ||
| 71 | /** | |
| 72 | * zoom the display in or out, depending on the direction of the | |
| 73 | * mouse wheel motion. | |
| 74 | */ | |
| 75 | public void mouseWheelMoved(MouseWheelEvent e) { | |
| 76 | 0 | boolean accepted = checkModifiers(e); |
| 77 | 0 | if(accepted == true) { |
| 78 | 0 | VisualizationViewer vv = (VisualizationViewer)e.getSource(); |
| 79 | 0 | Point2D mouse = e.getPoint(); |
| 80 | 0 | Point2D center = vv.getCenter(); |
| 81 | 0 | int amount = e.getWheelRotation(); |
| 82 | 0 | if(zoomAtMouse) { |
| 83 | 0 | if(amount > 0) { |
| 84 | 0 | scaler.scale(vv, in, mouse); |
| 85 | 0 | } else if(amount < 0) { |
| 86 | 0 | scaler.scale(vv, out, mouse); |
| 87 | } | |
| 88 | } else { | |
| 89 | 0 | if(amount > 0) { |
| 90 | 0 | scaler.scale(vv, in, center); |
| 91 | 0 | } else if(amount < 0) { |
| 92 | 0 | scaler.scale(vv, out, center); |
| 93 | } | |
| 94 | } | |
| 95 | 0 | e.consume(); |
| 96 | 0 | vv.repaint(); |
| 97 | } | |
| 98 | 0 | } |
| 99 | /** | |
| 100 | * @return Returns the zoom in value. | |
| 101 | */ | |
| 102 | public float getIn() { | |
| 103 | 0 | return in; |
| 104 | } | |
| 105 | /** | |
| 106 | * @param in The zoom in value to set. | |
| 107 | */ | |
| 108 | public void setIn(float in) { | |
| 109 | 0 | this.in = in; |
| 110 | 0 | } |
| 111 | /** | |
| 112 | * @return Returns the zoom out value. | |
| 113 | */ | |
| 114 | public float getOut() { | |
| 115 | 0 | return out; |
| 116 | } | |
| 117 | /** | |
| 118 | * @param out The zoom out value to set. | |
| 119 | */ | |
| 120 | public void setOut(float out) { | |
| 121 | 0 | this.out = out; |
| 122 | 0 | } |
| 123 | ||
| 124 | public ScalingControl getScaler() { | |
| 125 | 0 | return scaler; |
| 126 | } | |
| 127 | ||
| 128 | public void setScaler(ScalingControl scaler) { | |
| 129 | 0 | this.scaler = scaler; |
| 130 | 0 | } |
| 131 | } |
|
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