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annotate org.eclipse.draw2d/src/org/eclipse/draw2d/RelativeLocator.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 |
parents | bc29606a740c |
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1 /******************************************************************************* |
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2 * Copyright (c) 2000, 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 module org.eclipse.draw2d.RelativeLocator; |
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14 |
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15 import java.lang.all; |
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16 |
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17 import org.eclipse.draw2d.geometry.Dimension; |
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18 import org.eclipse.draw2d.geometry.PrecisionRectangle; |
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19 import org.eclipse.draw2d.geometry.Rectangle; |
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20 import org.eclipse.draw2d.Locator; |
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21 import org.eclipse.draw2d.IFigure; |
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22 import org.eclipse.draw2d.PositionConstants; |
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23 |
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24 /** |
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25 * Places a handle relative to a figure's bounds. The placement is determined by |
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26 * indicating the figure to which the placement is relative, and two floating-point value |
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27 * indicating the horizontal and vertical offset from that figure's top-left corner. The |
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28 * values (0.0, 0.0) would indicate the figure's top-left corner, while the values (1.0, |
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29 * 1.0) would indicate the figure's bottom-right corner. |
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30 * <P> |
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31 * Constants such as {@link PositionConstants#NORTH NORTH} and {@link |
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32 * PositionConstants#SOUTH SOUTH} can be used to set the placement. |
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33 */ |
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34 public class RelativeLocator |
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35 : Locator |
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36 { |
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37 |
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38 private double relativeX; |
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39 private double relativeY; |
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40 private IFigure reference; |
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41 |
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42 /** |
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43 * Null constructor. The reference figure must be set before use. The relative locations |
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44 * will default to (0.0, 0.0). |
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45 * @since 2.0 |
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46 */ |
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47 public this() { |
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48 relativeX = 0.0; |
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49 relativeY = 0.0; |
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50 } |
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51 |
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52 /** |
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53 * Constructs a RelativeLocator with the given reference figure and relative location. The |
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54 * location is a constant from {@link PositionConstants} used as a convenient and readable |
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55 * way to set both the relativeX and relativeY values. |
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56 * @param reference the reference figure |
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57 * @param location one of NORTH, NORTH_EAST, etc. |
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58 * @since 2.0 |
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59 */ |
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60 public this(IFigure reference, int location) { |
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61 setReferenceFigure(reference); |
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62 switch (location & PositionConstants.NORTH_SOUTH) { |
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63 case PositionConstants.NORTH: |
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64 relativeY = 0; break; |
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65 case PositionConstants.SOUTH: |
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66 relativeY = 1.0; break; |
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67 default: |
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68 relativeY = 0.5; |
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69 } |
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70 |
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71 switch (location & PositionConstants.EAST_WEST) { |
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72 case PositionConstants.WEST: |
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73 relativeX = 0; break; |
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74 case PositionConstants.EAST: |
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75 relativeX = 1.0; break; |
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76 default: |
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77 relativeX = 0.5; |
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78 } |
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79 } |
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80 |
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81 /** |
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82 * Constructs a RelativeLocator with the given reference Figure and offset ratios. |
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83 * @param reference the reference figure |
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84 * @param relativeX the relative X offset |
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85 * @param relativeY the relative Y offset |
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86 * @since 2.0 |
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87 */ |
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88 public this(IFigure reference, double relativeX, double relativeY) { |
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89 setReferenceFigure(reference); |
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90 this.relativeX = relativeX; |
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91 this.relativeY = relativeY; |
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92 } |
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93 |
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94 /** |
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95 * Returns the Reference Box in the Reference Figure's coordinate system. |
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96 * The returned Rectangle may be by reference, and should <b>not</b> be modified. |
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97 * @return the reference box |
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98 * @since 2.0 |
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99 */ |
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100 protected Rectangle getReferenceBox() { |
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101 return getReferenceFigure().getBounds(); |
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102 } |
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103 |
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104 /** |
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105 * Returns the Figure this locator is relative to. |
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106 * @return the reference figure |
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107 * @since 2.0 |
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108 */ |
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109 protected IFigure getReferenceFigure() { |
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110 return reference; |
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111 } |
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112 |
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113 /** |
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114 * Relocates the target using the relative offset locations. |
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115 * @see org.eclipse.draw2d.Locator#relocate(org.eclipse.draw2d.IFigure) |
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116 */ |
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117 public void relocate(IFigure target) { |
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118 IFigure reference = getReferenceFigure(); |
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119 Rectangle targetBounds = new PrecisionRectangle(getReferenceBox().getResized(-1, -1)); |
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120 reference.translateToAbsolute(targetBounds); |
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121 target.translateToRelative(targetBounds); |
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122 targetBounds.resize(1, 1); |
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123 |
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124 Dimension targetSize = target.getPreferredSize(); |
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125 |
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126 targetBounds.x |
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127 += cast(int) (targetBounds.width * relativeX - ((targetSize.width + 1) / 2)); |
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128 targetBounds.y |
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129 += cast(int) (targetBounds.height * relativeY - ((targetSize.height + 1) / 2)); |
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130 targetBounds.setSize(targetSize); |
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131 target.setBounds(targetBounds); |
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132 } |
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133 |
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134 /** |
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135 * Sets the reference figure this locator uses to place the target figure. |
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136 * @param reference the reference figure |
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137 * @since 2.0 |
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138 */ |
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139 public void setReferenceFigure(IFigure reference) { |
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140 this.reference = reference; |
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141 } |
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142 |
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143 } |