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annotate dwtx/draw2d/text/FlowAdapter.d @ 98:95307ad235d9

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Added Draw2d code, still work in progress
author Frank Benoit <benoit@tionex.de>
date Sun, 03 Aug 2008 00:52:14 +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 module dwtx.draw2d.text.FlowAdapter;
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14
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15 import dwt.dwthelper.utils;
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16 import dwtx.dwtxhelper.Collection;
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17
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18 import dwtx.draw2d.IFigure;
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19 import dwtx.draw2d.geometry.Dimension;
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20 import dwtx.draw2d.geometry.Rectangle;
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21 import dwtx.draw2d.text.FlowFigure;
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22 import dwtx.draw2d.text.BidiProcessor;
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23 import dwtx.draw2d.text.FlowFigureLayout;
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24 import dwtx.draw2d.text.FlowContext;
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25 import dwtx.draw2d.text.ContentBox;
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26 import dwtx.draw2d.text.BidiInfo;
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27 import dwtx.draw2d.text.BidiChars;
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28
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29
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30 /**
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31 * Adapts non-flow figures for use within a parent hierarchy requiring flow figures.
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32 * Normal draw2d figures can be added as children. If a normal LayoutManager is set, the
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33 * children will be positioned by that layout manager. The size of this figure within
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34 * the flow will be determined by its preferred size.
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35 * <p>
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36 * WARNING: This class is not intended to be subclassed by clients.
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37 *
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38 * @author Pratik Shah
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39 * @since 3.1
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40 */
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41 public class FlowAdapter
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42 : FlowFigure
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43 {
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44
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45 private FlowContext context;
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46 private FigureBox box;
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47
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48 public this(){
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49 box = new FigureBox();
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50 }
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51 /**
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52 * This FlowFigure contributes an Object Replacement Character.
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53 * @see FlowFigure#contributeBidi(BidiProcessor)
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54 */
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55 protected void contributeBidi(BidiProcessor proc) {
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56 box.setBidiLevel(-1);
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57 // contributes a single object replacement char
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58 proc.add(this, BidiChars.OBJ);
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59 }
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60
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61 /**
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62 * @return <code>null</code>
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63 * @see dwtx.draw2d.text.FlowFigure#createDefaultFlowLayout()
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64 */
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65 protected FlowFigureLayout createDefaultFlowLayout() {
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66 return null;
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67 }
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68
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69 /**
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70 * Sizes the content box to be big enough to display all figures. Wraps to the next line
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71 * if there is not enough room on the current one.
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72 * @see dwtx.draw2d.Figure#layout()
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73 */
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74 protected void layout() {
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75 int wHint = context.getRemainingLineWidth();
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76 if (wHint is Integer.MAX_VALUE)
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77 wHint = -1;
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78 Dimension prefSize = getPreferredSize(wHint, -1);
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79 if (context.isCurrentLineOccupied()
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80 && prefSize.width > context.getRemainingLineWidth()) {
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81 context.endLine();
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82 prefSize = getPreferredSize(context.getRemainingLineWidth(), -1);
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83 }
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84 box.setSize(prefSize);
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85 context.addToCurrentLine(box);
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86 }
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87
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88 /**
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89 * Updates the bounds of this figure to match that of its content box, and lays out this
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90 * figure's children.
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91 * @see FlowFigure#postValidate()
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92 */
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93 public void postValidate() {
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94 setBounds(new Rectangle(box.getX(), box.getBaseline() - box.ascent,
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95 box.width, box.ascent));
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96 super.layout();
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97 for (Iterator itr = getChildren().iterator(); itr.hasNext();)
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98 (cast(IFigure)itr.next()).validate();
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99 }
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100
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101 /**
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102 * Sets the bidi level of the content box associated with this Figure
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103 * @see FlowFigure#setBidiInfo(BidiInfo)
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104 */
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105 public void setBidiInfo(BidiInfo info) {
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106 box.setBidiLevel(info.levelInfo[0]);
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107 }
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108
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109 /**
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110 * @see dwtx.draw2d.IFigure#setBounds(dwtx.draw2d.geometry.Rectangle)
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111 */
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112 public void setBounds(Rectangle rect) {
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113 int x = bounds.x,
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114 y = bounds.y;
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115
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116 bool resize = (rect.width !is bounds.width) || (rect.height !is bounds.height),
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117 translate = (rect.x !is x) || (rect.y !is y);
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118
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119 if ((resize || translate) && isVisible())
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120 erase();
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121 if (translate) {
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122 int dx = rect.x - x;
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123 int dy = rect.y - y;
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124 primTranslate(dx, dy);
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125 }
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126
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127 bounds.width = rect.width;
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128 bounds.height = rect.height;
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129
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130 if (translate || resize) {
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131 fireFigureMoved();
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132 repaint();
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133 }
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134 }
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135
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136 /**
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137 * @see FlowFigure#setFlowContext(FlowContext)
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138 */
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139 public void setFlowContext(FlowContext flowContext) {
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140 context = flowContext;
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141 }
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142
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143 /**
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144 * Do not validate children.
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145 * @see dwtx.draw2d.IFigure#validate()
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146 */
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147 public void validate() {
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148 if (isValid())
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149 return;
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150 setValid(true);
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151 layout();
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152 }
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153
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154 private class FigureBox : ContentBox {
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155 private int ascent;
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156 public bool containsPoint(int x, int y) {
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157 return this.outer.containsPoint(x, y);
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158 }
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159 public int getAscent() {
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160 return ascent;
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161 }
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162 public int getDescent() {
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163 return 0;
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164 }
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165 public void setSize(Dimension size) {
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166 ascent = size.height;
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167 width = size.width;
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168 }
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169 }
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170
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171 }