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annotate org.eclipse.draw2d/src/org/eclipse/draw2d/LayoutAnimator.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 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.LayoutAnimator;
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15
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16 import java.lang.all;
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17 import java.util.HashMap;
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18 import java.util.List;
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19 import java.util.Map;
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20
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21 import org.eclipse.draw2d.geometry.Rectangle;
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22 import org.eclipse.draw2d.Animator;
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23 import org.eclipse.draw2d.LayoutListener;
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24 import org.eclipse.draw2d.IFigure;
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25 import org.eclipse.draw2d.Animation;
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26
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27 /**
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28 * Animates the layout of a figure's children. The animator will capture the effects of a
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29 * layout manager, and then play back the placement of children using linear interpolation
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30 * for each child's start and end locations.
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31 * <P>
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32 * To use an animator, hook it as a layout listener for the figure whose layout is to
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33 * be animated, by calling {@link IFigure#addLayoutListener(LayoutListener)}. It is not
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34 * necessary to have an animator for every figure in a composition that is undergoing
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35 * animation. For example, if a figure without an animator moves during the animation, it
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36 * will continue to move and layout its children normally during each step of the
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37 * animation.
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38 * <P>
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39 * Animator must be used in conjunction with layouts. If figures are placed manually using
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40 * <code>setBounds()</code>, the animator may not be able to track and playback the
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41 * changes that occur.
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42 *
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43 * @since 3.2
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44 */
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45 public class LayoutAnimator : Animator , LayoutListener {
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46
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47 private static LayoutAnimator INSTANCE_;
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48 static LayoutAnimator INSTANCE(){
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49 if( INSTANCE_ is null ){
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50 synchronized( LayoutAnimator.classinfo ){
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51 if( INSTANCE_ is null ){
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52 INSTANCE_ = new LayoutAnimator();
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53 }
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54 }
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55 }
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56 assert(INSTANCE_);
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57 return INSTANCE_;
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58 }
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59
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60 /**
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61 * Constructs a new Animator. The default instance ({@link #getDefault()}) can be used on
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62 * all figures being animated.
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63 *
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64 * @since 3.2
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65 */
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66 protected this() { }
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67
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68 /**
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69 * Returns an object encapsulating the placement of children in a container. This method
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70 * is called to capture both the initial and final states.
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71 * @param container the container figure
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72 * @return the current state
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73 * @since 3.2
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74 */
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75 protected Object getCurrentState(IFigure container) {
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76 Map locations = new HashMap();
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77 List children = container.getChildren();
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78 IFigure child;
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79 for (int i = 0; i < children.size(); i++) {
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80 child = cast(IFigure)children.get(i);
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81 locations.put(cast(Object)child, child.getBounds().getCopy());
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82 }
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83 return cast(Object)locations;
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84 }
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85
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86 /**
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87 * Returns the default instance.
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88 * @return the default instance
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89 * @since 3.2
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90 */
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91 public static LayoutAnimator getDefault() {
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92 return INSTANCE;
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93 }
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94
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95 /**
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96 * Hooks invalidation in case animation is in progress.
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97 * @see LayoutListener#invalidate(IFigure)
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98 */
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99 public final void invalidate(IFigure container) {
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100 if (Animation.isInitialRecording())
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101 Animation.hookAnimator(container, this);
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102 }
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103
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104 /**
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105 * Hooks layout in case animation is in progress.
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106 * @see org.eclipse.draw2d.LayoutListener#layout(org.eclipse.draw2d.IFigure)
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107 */
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108 public final bool layout(IFigure container) {
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109 if (Animation.isAnimating())
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110 return Animation.hookPlayback(container, this);
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111 return false;
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112 }
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113
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114 /**
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115 * Plays back the animated layout.
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116 * @see Animator#playback(IFigure)
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117 */
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118 protected bool playback(IFigure container) {
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119 Map initial = cast(Map) Animation.getInitialState(this, container);
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120 Map ending = cast(Map) Animation.getFinalState(this, container);
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121 if (initial is null)
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122 return false;
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123 List children = container.getChildren();
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124
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125 float progress = Animation.getProgress();
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126 float ssergorp = 1 - progress;
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127
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128 Rectangle rect1, rect2;
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129
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130 for (int i = 0; i < children.size(); i++) {
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131 IFigure child = cast(IFigure) children.get(i);
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132 rect1 = cast(Rectangle)initial.get(cast(Object)child);
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133 rect2 = cast(Rectangle)ending.get(cast(Object)child);
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134
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135 //TODO need to change this to hide the figure until the end.
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136 if (rect1 is null)
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137 continue;
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138 child.setBounds(new Rectangle(
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139 cast(int)Math.round(progress * rect2.x + ssergorp * rect1.x),
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140 cast(int)Math.round(progress * rect2.y + ssergorp * rect1.y),
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141 cast(int)Math.round(progress * rect2.width + ssergorp * rect1.width),
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142 cast(int)Math.round(progress * rect2.height + ssergorp * rect1.height)
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143 ));
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144 }
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145 return true;
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146 }
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147
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148 /**
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149 * Hooks post layout in case animation is in progress.
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150 * @see LayoutListener#postLayout(IFigure)
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151 */
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152 public final void postLayout(IFigure container) {
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153 if (Animation.isFinalRecording())
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154 Animation.hookNeedsCapture(container, this);
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155 }
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156
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157 /**
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158 * This callback is unused. Reserved for possible future use.
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159 * @see LayoutListener#remove(IFigure)
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160 */
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161 public final void remove(IFigure child) { }
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162
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163 /**
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164 * This callback is unused. Reserved for possible future use.
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165 * @see LayoutListener#setConstraint(IFigure, Object)
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166 */
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167 public final void setConstraint(IFigure child, Object constraint) { }
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168
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169 }