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annotate org.eclipse.draw2d/src/org/eclipse/draw2d/Animation.d @ 16:dbfb303e8fb0

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first complete successful compile (win-only)
author Frank Benoit <benoit@tionex.de>
date Wed, 18 Mar 2009 08:56:47 +0100
parents bc29606a740c
children
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1 /*******************************************************************************
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2 * Copyright (c) 2005, 2006 IBM Corporation and others.
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3 * All rights reserved. This program and the accompanying materials
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4 * are made available under the terms of the Eclipse Public License v1.0
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5 * which accompanies this distribution, and is available at
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6 * http://www.eclipse.org/legal/epl-v10.html
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7 *
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8 * Contributors:
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9 * IBM Corporation - initial API and implementation
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10 * Port to the D programming language:
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11 * Frank Benoit <benoit@tionex.de>
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12 *******************************************************************************/
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13
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14 module org.eclipse.draw2d.Animation;
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16 import java.lang.all;
16
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17 import java.util.HashSet;
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18 import java.util.HashMap;
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19 import java.util.Set;
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20 import java.util.Iterator;
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21 import java.util.Map;
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22
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23 import org.eclipse.draw2d.Animator;
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24 import org.eclipse.draw2d.IFigure;
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25 import org.eclipse.draw2d.UpdateManager;
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28 /**
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29 * A utility for coordinating figure animations. During animation, multiple
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30 * <i>animators</i> are employed to capture the <em>initial</em> and <em>final</em> states
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31 * for one or more figures. The animators then playback the animation by interpolating the
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32 * intermediate states for each figure using the initial and final "keyframes".
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33 * <P>
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34 * An animator is usually stateless and represents an specific technique. Any state
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35 * information is stored by the Animation utility. Therefore, one instance can be used
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36 * with multiple figures. Animators hook into the validation mechanism for figures and
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37 * connections. These hooks are used to capture the states, and to intercept the typical
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38 * layout process to insert the interpolated state.
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39 * <P>
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40 * To indicate that animation is desired, clients must call {@link #markBegin()} prior to
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41 * invalidating any figures that are to be included in the animation. After this method is
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42 * called, changes are made, and {@link #run()} is invoked. The run method will force a
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43 * validation pass to capture the final states, and then commence the animation. The
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44 * animation is synchronous and the method does not return until the animation has
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45 * completed.
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46 * @see LayoutAnimator
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47 * @since 3.2
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48 */
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49 public class Animation {
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50
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51 static class AnimPair {
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52
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53 const Animator animator;
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54 const IFigure figure;
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55
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56 this(Animator animator, IFigure figure) {
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57 this.animator = animator;
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58 this.figure = figure;
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59 }
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60
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61 public override int opEquals(Object obj) {
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62 AnimPair pair = cast(AnimPair)obj;
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63 return pair.animator is animator && pair.figure is figure;
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64 }
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65
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66 public override hash_t toHash() {
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67 return (cast(Object)animator).toHash() ^ (cast(Object)figure).toHash();
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68 }
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69 }
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70 private static const int DEFAULT_DELAY = 250;
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71 private static Set figureAnimators;
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72 private static Map finalStates;
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73
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74 private static Map initialStates;
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75 private static const int PLAYBACK = 3;
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76 private static float progress;
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77 private static const int RECORD_FINAL = 2;
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78
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79 private static const int RECORD_INITIAL = 1;
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80 private static long startTime;
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81 private static int state;
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82 private static Set toCapture;
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83
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84 private static UpdateManager updateManager;
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85
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86 private static void capture() {
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87 Iterator keys = figureAnimators.iterator();
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88 while (keys.hasNext()) {
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89 AnimPair pair = cast(AnimPair) keys.next();
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90 if (toCapture.contains(pair))
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91 pair.animator.capture(pair.figure);
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92 else
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93 keys.remove();
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94 }
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95 }
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96
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97 static void cleanup() {
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98 if (figureAnimators !is null) {
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99 Iterator keys = figureAnimators.iterator();
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100 while (keys.hasNext()) {
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101 AnimPair pair = cast(AnimPair) keys.next();
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102 pair.animator.tearDown(pair.figure);
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103 }
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104 }
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105
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106 state = 0;
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107 step();
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108 //Allow layout to occur normally
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109 //updateManager.performUpdate();
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110
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111 initialStates = null;
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112 finalStates = null;
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113 figureAnimators = null;
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114 updateManager = null;
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115 toCapture = null;
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116 state = 0;
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117 }
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118
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119 private static void doRun(int duration) {
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120 state = RECORD_FINAL;
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121 findUpdateManager();
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122 updateManager.performValidation();
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123 capture();
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124 state = PLAYBACK;
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125 progress = 0.1f;
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126 startTime = System.currentTimeMillis();
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127
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128 notifyPlaybackStarting();
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129
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130 while (progress !is 0) {
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131 step();
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132 updateManager.performUpdate();
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133 if (progress is 1.0)
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134 progress = 0;
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135 else {
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136 int delta = cast(int)(System.currentTimeMillis() - startTime);
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137 if (delta >= duration)
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138 progress = 1f;
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139 else
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140 progress = 0.1f + 0.9f * delta / duration;
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141 }
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142 }
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143 }
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144
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145 private static void findUpdateManager() {
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146 AnimPair pair = cast(AnimPair) figureAnimators.iterator().next();
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147 updateManager = pair.figure.getUpdateManager();
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148 }
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149
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150 /**
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151 * Returns the final animation state for the given figure.
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152 * @param animator the animator for the figure
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153 * @param figure the figure being animated
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154 * @return the final state
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155 * @since 3.2
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156 */
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157 public static Object getFinalState(Animator animator, IFigure figure) {
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158 return finalStates.get(new AnimPair(animator, figure));
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159 }
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160
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161 /**
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162 * Returns the initial animation state for the given animator and figure. If no state was
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163 * recorded, <code>null</code> is returned.
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164 * @param animator the animator for the figure
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165 * @param figure the figure being animated
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166 * @return the initial state
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167 * @since 3.2
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168 */
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169 public static Object getInitialState(Animator animator, IFigure figure) {
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170 return initialStates.get(new AnimPair(animator, figure));
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171 }
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172
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173 /**
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174 * Returns the animation progress, where 0.0 < progress &#8804; 1.0.
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175 * @return the progress of the animation
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176 * @since 3.2
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177 */
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178 public static float getProgress() {
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179 return progress;
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180 }
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181
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182 static void hookAnimator(IFigure figure, Animator animator) {
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183 AnimPair pair = new AnimPair(animator, figure);
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184 if (figureAnimators.add(pair))
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185 animator.init(figure);
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186 }
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187
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188 static void hookNeedsCapture(IFigure figure, Animator animator) {
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189 AnimPair pair = new AnimPair(animator, figure);
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190 if (figureAnimators.contains(pair))
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191 toCapture.add(pair);
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192 }
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193
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194 static bool hookPlayback(IFigure figure, Animator animator) {
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195 if (toCapture.contains(new AnimPair(animator, figure)))
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196 return animator.playback_package(figure);
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197 return false;
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198 }
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199
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200 /**
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201 * Returns <code>true</code> if animation is in progress.
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202 * @return <code>true</code> when animating
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203 * @since 3.2
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204 */
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205 public static bool isAnimating() {
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206 return state is PLAYBACK;
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207 }
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208
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209 static bool isFinalRecording() {
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210 return state is RECORD_FINAL;
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211 }
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212
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213 static bool isInitialRecording() {
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214 return state is RECORD_INITIAL;
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215 }
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216
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217 /**
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218 * Marks the beginning of the animation process. If the beginning has already been marked,
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219 * this has no effect.
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220 * @return returns <code>true</code> if beginning was not previously marked
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221 * @since 3.2
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222 */
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223 public static bool markBegin() {
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224 if (state is 0) {
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225 state = RECORD_INITIAL;
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226 initialStates = new HashMap();
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227 finalStates = new HashMap();
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228 figureAnimators = new HashSet();
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229 toCapture = new HashSet();
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230 return true;
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231 }
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232 return false;
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233 }
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234
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235 private static void notifyPlaybackStarting() {
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236 Iterator keys = figureAnimators.iterator();
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237 while (keys.hasNext()) {
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238 AnimPair pair = cast(AnimPair) keys.next();
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239 pair.animator.playbackStarting(pair.figure);
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240 }
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241 }
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242
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243 static void putFinalState(Animator animator, IFigure key, Object state) {
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244 finalStates.put(new AnimPair(animator, key), state);
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245 }
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246
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247 static void putInitialState(Animator animator, IFigure key, Object state) {
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248 initialStates.put(new AnimPair(animator, key), state);
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249 }
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250
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251 /**
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252 * Runs animation using the recommended duration: 250 milliseconds.
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253 * @see #run(int)
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254 * @since 3.2
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255 */
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256 public static void run() {
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257 run(DEFAULT_DELAY);
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258 }
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259
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260 /**
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261 * Captures the final states for the animation and then plays the animation.
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262 * @param duration the length of animation in milliseconds
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263 * @since 3.2
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264 */
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265 public static void run(int duration) {
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266 if (state is 0)
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267 return;
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268 try {
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269 if (!figureAnimators.isEmpty())
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270 doRun(duration);
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271 } finally {
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272 cleanup();
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273 }
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274 }
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275
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276 private static void step() {
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277 Iterator iter = initialStates.keySet().iterator();
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278 while (iter.hasNext())
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279 (cast(AnimPair)iter.next()).figure.revalidate();
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280 }
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281
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282 }