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|---|---|---|
| 1 | /* | |
| 2 | * Copyright (c) 2005, the JUNG Project and the Regents of the University of | |
| 3 | * California All rights reserved. | |
| 4 | * | |
| 5 | * This software is open-source under the BSD license; see either "license.txt" | |
| 6 | * or http://jung.sourceforge.net/license.txt for a description. | |
| 7 | * | |
| 8 | * Created on Apr 16, 2005 | |
| 9 | */ | |
| 10 | ||
| 11 | package edu.uci.ics.jung.visualization.transform; | |
| 12 | ||
| 13 | import java.awt.geom.AffineTransform; | |
| 14 | import java.awt.geom.Point2D; | |
| 15 | ||
| 16 | import javax.swing.event.ChangeListener; | |
| 17 | import javax.swing.event.EventListenerList; | |
| 18 | ||
| 19 | import edu.uci.ics.jung.utils.ChangeEventSupport; | |
| 20 | import edu.uci.ics.jung.utils.DefaultChangeEventSupport; | |
| 21 | import edu.uci.ics.jung.visualization.transform.shape.ShapeTransformer; | |
| 22 | ||
| 23 | /** | |
| 24 | * | |
| 25 | * Provides methods to mutate the AffineTransform used by AffineTransformer | |
| 26 | * base class to map points from one coordinate system to | |
| 27 | * another. | |
| 28 | * | |
| 29 | * | |
| 30 | * @author Tom Nelson - RABA Technologies | |
| 31 | * | |
| 32 | * | |
| 33 | */ | |
| 34 | public class MutableAffineTransformer extends AffineTransformer | |
| 35 | implements MutableTransformer, ShapeTransformer, ChangeEventSupport { | |
| 36 | ||
| 37 | 0 | protected ChangeEventSupport changeSupport = |
| 38 | new DefaultChangeEventSupport(this); | |
| 39 | ||
| 40 | /** | |
| 41 | * create an instance that does not transform points | |
| 42 | * | |
| 43 | */ | |
| 44 | 0 | public MutableAffineTransformer() { |
| 45 | // nothing left to do | |
| 46 | 0 | } |
| 47 | /** | |
| 48 | * Create an instance with the supplied transform | |
| 49 | */ | |
| 50 | public MutableAffineTransformer(AffineTransform transform) { | |
| 51 | 0 | super(transform); |
| 52 | 0 | } |
| 53 | ||
| 54 | public String toString() { | |
| 55 | 0 | return "MutableAffineTransformer using "+transform; |
| 56 | } | |
| 57 | /** | |
| 58 | * setter for the scale | |
| 59 | * fires a PropertyChangeEvent with the AffineTransforms representing | |
| 60 | * the previous and new values for scale and offset | |
| 61 | * @param scalex | |
| 62 | * @param scaley | |
| 63 | */ | |
| 64 | public void scale(double scalex, double scaley, Point2D from) { | |
| 65 | 0 | AffineTransform xf = AffineTransform.getTranslateInstance(from.getX(),from.getY()); |
| 66 | 0 | xf.scale(scalex, scaley); |
| 67 | 0 | xf.translate(-from.getX(), -from.getY()); |
| 68 | 0 | inverse = null; |
| 69 | 0 | transform.preConcatenate(xf); |
| 70 | 0 | fireStateChanged(); |
| 71 | 0 | } |
| 72 | ||
| 73 | /** | |
| 74 | * setter for the scale | |
| 75 | * fires a PropertyChangeEvent with the AffineTransforms representing | |
| 76 | * the previous and new values for scale and offset | |
| 77 | * @param scalex | |
| 78 | * @param scaley | |
| 79 | */ | |
| 80 | public void setScale(double scalex, double scaley, Point2D from) { | |
| 81 | 0 | transform.setToIdentity(); |
| 82 | 0 | scale(scalex, scaley, from); |
| 83 | 0 | } |
| 84 | ||
| 85 | /** | |
| 86 | * shears the transform by passed parameters | |
| 87 | * @param shx x value to shear | |
| 88 | * @param shy y value to shear | |
| 89 | */ | |
| 90 | public void shear(double shx, double shy, Point2D from) { | |
| 91 | 0 | inverse = null; |
| 92 | 0 | AffineTransform at = |
| 93 | AffineTransform.getTranslateInstance(from.getX(), from.getY()); | |
| 94 | 0 | at.shear(shx, shy); |
| 95 | 0 | at.translate(-from.getX(), -from.getY()); |
| 96 | 0 | transform.preConcatenate(at); |
| 97 | 0 | fireStateChanged(); |
| 98 | 0 | } |
| 99 | ||
| 100 | /** | |
| 101 | * replace the Transform's translate x and y values | |
| 102 | * with the passed values, leaving the scale values | |
| 103 | * unchanged | |
| 104 | * @param tx the x value | |
| 105 | * @param ty the y value | |
| 106 | */ | |
| 107 | public void setTranslate(double tx, double ty) { | |
| 108 | 0 | float scalex = (float) transform.getScaleX(); |
| 109 | 0 | float scaley = (float) transform.getScaleY(); |
| 110 | 0 | float shearx = (float) transform.getShearX(); |
| 111 | 0 | float sheary = (float) transform.getShearY(); |
| 112 | 0 | inverse = null; |
| 113 | 0 | transform.setTransform(scalex, |
| 114 | sheary, | |
| 115 | shearx, | |
| 116 | scaley, | |
| 117 | tx, ty); | |
| 118 | 0 | fireStateChanged(); |
| 119 | 0 | } |
| 120 | ||
| 121 | /** | |
| 122 | * Apply the passed values to the current Transform | |
| 123 | * @param offsetx the x-value | |
| 124 | * @param offsety the y-value | |
| 125 | */ | |
| 126 | public void translate(double offsetx, double offsety) { | |
| 127 | 0 | inverse = null; |
| 128 | 0 | transform.translate(offsetx, offsety); |
| 129 | 0 | fireStateChanged(); |
| 130 | 0 | } |
| 131 | ||
| 132 | /** | |
| 133 | * preconcatenates the rotation at the supplied point with the current transform | |
| 134 | */ | |
| 135 | public void rotate(double theta, Point2D from) { | |
| 136 | 0 | AffineTransform rotate = |
| 137 | AffineTransform.getRotateInstance(theta, from.getX(), from.getY()); | |
| 138 | 0 | inverse = null; |
| 139 | 0 | transform.preConcatenate(rotate); |
| 140 | ||
| 141 | 0 | fireStateChanged(); |
| 142 | 0 | } |
| 143 | ||
| 144 | /** | |
| 145 | * rotates the current transform at the supplied points | |
| 146 | */ | |
| 147 | public void rotate(double radians, double x, double y) { | |
| 148 | 0 | inverse = null; |
| 149 | 0 | transform.rotate(radians, x, y); |
| 150 | 0 | fireStateChanged(); |
| 151 | 0 | } |
| 152 | ||
| 153 | public void concatenate(AffineTransform xform) { | |
| 154 | 0 | inverse = null; |
| 155 | 0 | transform.concatenate(xform); |
| 156 | 0 | fireStateChanged(); |
| 157 | ||
| 158 | 0 | } |
| 159 | public void preConcatenate(AffineTransform xform) { | |
| 160 | 0 | inverse = null; |
| 161 | 0 | transform.preConcatenate(xform); |
| 162 | 0 | fireStateChanged(); |
| 163 | 0 | } |
| 164 | ||
| 165 | ||
| 166 | /** | |
| 167 | * Adds a <code>ChangeListener</code>. | |
| 168 | * @param l the listener to be added | |
| 169 | */ | |
| 170 | public void addChangeListener(ChangeListener l) { | |
| 171 | 0 | changeSupport.addChangeListener(l); |
| 172 | 0 | } |
| 173 | ||
| 174 | /** | |
| 175 | * Removes a ChangeListener. | |
| 176 | * @param l the listener to be removed | |
| 177 | */ | |
| 178 | public void removeChangeListener(ChangeListener l) { | |
| 179 | 0 | changeSupport.removeChangeListener(l); |
| 180 | 0 | } |
| 181 | ||
| 182 | /** | |
| 183 | * Returns an array of all the <code>ChangeListener</code>s added | |
| 184 | * with addChangeListener(). | |
| 185 | * | |
| 186 | * @return all of the <code>ChangeListener</code>s added or an empty | |
| 187 | * array if no listeners have been added | |
| 188 | */ | |
| 189 | public ChangeListener[] getChangeListeners() { | |
| 190 | 0 | return changeSupport.getChangeListeners(); |
| 191 | } | |
| 192 | ||
| 193 | /** | |
| 194 | * Notifies all listeners that have registered interest for | |
| 195 | * notification on this event type. The event instance | |
| 196 | * is lazily created. | |
| 197 | * @see EventListenerList | |
| 198 | */ | |
| 199 | public void fireStateChanged() { | |
| 200 | 0 | changeSupport.fireStateChanged(); |
| 201 | 0 | } |
| 202 | ||
| 203 | public void setToIdentity() { | |
| 204 | 0 | inverse = null; |
| 205 | 0 | transform.setToIdentity(); |
| 206 | 0 | fireStateChanged(); |
| 207 | 0 | } |
| 208 | } |
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