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annotate org.eclipse.draw2d/src/org/eclipse/draw2d/XYLayout.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
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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.XYLayout;
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14
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15 import java.lang.all;
16
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16 import java.util.ListIterator;
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17 import java.util.HashMap;
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18 import java.util.Iterator;
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19 import java.util.Map;
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20
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21 import org.eclipse.draw2d.geometry.Dimension;
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22 import org.eclipse.draw2d.geometry.Insets;
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23 import org.eclipse.draw2d.geometry.Point;
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24 import org.eclipse.draw2d.geometry.Rectangle;
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25
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26 import org.eclipse.draw2d.AbstractLayout;
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27 import org.eclipse.draw2d.IFigure;
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28
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29 /**
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30 * This class implements the {@link org.eclipse.draw2d.LayoutManager} interface using the
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31 * XY Layout algorithm. This lays out the components using the layout constraints as
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32 * defined by each component.
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33 */
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34 public class XYLayout
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35 : AbstractLayout
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36 {
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37
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38 /** The layout contraints */
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39 protected Map constraints;
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40
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41 this(){
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42 constraints = new HashMap();
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43 }
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44
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45 /**
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46 * Calculates and returns the preferred size of the input figure. Since in XYLayout the
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47 * location of the child should be preserved, the preferred size would be a region which
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48 * would hold all the children of the input figure. If no constraint is set, that child
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49 * is ignored for calculation. If width and height are not positive, the preferred
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50 * dimensions of the child are taken.
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51 *
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52 * @see AbstractLayout#calculatePreferredSize(IFigure, int, int)
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53 * @since 2.0
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54 */
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55 protected Dimension calculatePreferredSize(IFigure f, int wHint, int hHint) {
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56 Rectangle rect = new Rectangle();
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57 ListIterator children = f.getChildren().listIterator();
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58 while (children.hasNext()) {
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59 IFigure child = cast(IFigure)children.next();
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60 Rectangle r = cast(Rectangle)constraints.get(cast(Object)child);
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61 if (r is null)
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62 continue;
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63
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64 if (r.width is -1 || r.height is -1) {
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65 Dimension preferredSize = child.getPreferredSize(r.width, r.height);
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66 r = r.getCopy();
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67 if (r.width is -1)
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68 r.width = preferredSize.width;
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69 if (r.height is -1)
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70 r.height = preferredSize.height;
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71 }
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72 rect.union_(r);
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73 }
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74 Dimension d = rect.getSize();
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75 Insets insets = f.getInsets();
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76 return (new Dimension(d.width + insets.getWidth(), d.height + insets.getHeight())).
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77 union_(getBorderPreferredSize(f));
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78 }
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79
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80 /**
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81 * @see LayoutManager#getConstraint(IFigure)
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82 */
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83 public Object getConstraint(IFigure figure) {
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84 return constraints.get(cast(Object)figure);
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85 }
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86
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87 /**
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88 * Returns the origin for the given figure.
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89 * @param parent the figure whose origin is requested
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90 * @return the origin
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91 */
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92 public Point getOrigin(IFigure parent) {
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93 return parent.getClientArea().getLocation();
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94 }
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95
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96 /**
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97 * Implements the algorithm to layout the components of the given container figure.
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98 * Each component is laid out using its own layout constraint specifying its size
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99 * and position.
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100 *
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101 * @see LayoutManager#layout(IFigure)
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102 */
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103 public void layout(IFigure parent) {
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104 Iterator children = parent.getChildren().iterator();
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105 Point offset = getOrigin(parent);
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106 IFigure f;
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107 while (children.hasNext()) {
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108 f = cast(IFigure)children.next();
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109 Rectangle bounds = cast(Rectangle)getConstraint(f);
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110 if (bounds is null) continue;
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111
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112 if (bounds.width is -1 || bounds.height is -1) {
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113 Dimension preferredSize = f.getPreferredSize(bounds.width, bounds.height);
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114 bounds = bounds.getCopy();
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115 if (bounds.width is -1)
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116 bounds.width = preferredSize.width;
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117 if (bounds.height is -1)
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118 bounds.height = preferredSize.height;
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119 }
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120 bounds = bounds.getTranslated(offset);
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121 f.setBounds(bounds);
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122 }
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123 }
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124
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125 /**
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126 * @see LayoutManager#remove(IFigure)
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127 */
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128 public void remove(IFigure figure) {
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129 super.remove(figure);
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130 constraints.remove(cast(Object)figure);
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131 }
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132
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133 /**
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134 * Sets the layout constraint of the given figure. The constraints can only be of type
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135 * {@link Rectangle}.
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136 *
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137 * @see LayoutManager#setConstraint(IFigure, Object)
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138 * @since 2.0
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139 */
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140 public void setConstraint(IFigure figure, Object newConstraint) {
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141 super.setConstraint(figure, newConstraint);
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142 if (newConstraint !is null)
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143 constraints.put(cast(Object)figure, newConstraint);
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144 }
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145
bc29606a740c Added dwt-addons in original directory structure of eclipse.org
Frank Benoit <benoit@tionex.de>
parents:
diff changeset
146 }