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annotate org.eclipse.draw2d/src/org/eclipse/draw2d/LayoutAnimator.d @ 104:88652073d1c2
More work on icu
author | Frank Benoit <benoit@tionex.de> |
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date | Sat, 02 May 2009 11:27:24 +0200 |
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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; |
16
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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 } |