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annotate dwtx/draw2d/text/InlineFlowLayout.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) 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 dwtx.draw2d.text.InlineFlowLayout;
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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 import dwtx.draw2d.text.FlowContainerLayout;
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18 import dwtx.draw2d.text.FlowFigure;
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19 import dwtx.draw2d.text.LineBox;
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20 import dwtx.draw2d.text.CompositeBox;
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21 import dwtx.draw2d.text.NestedLine;
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22 import dwtx.draw2d.text.InlineFlow;
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23
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24 /**
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25 * The layout manager for {@link InlineFlow} figures.
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26 *
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27 * <P>WARNING: This class is not intended to be subclassed by clients.
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28 * @author hudsonr
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29 * @since 2.1
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30 */
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31 public class InlineFlowLayout
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32 : FlowContainerLayout
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33 {
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34
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35 /**
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36 * Creates a new InlineFlowLayout with the given FlowFigure.
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37 * @param flow The FlowFigure
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38 */
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39 public this(FlowFigure flow) {
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40 super(flow);
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41 }
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42
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43 /**
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44 * Adds the given box as a line below the current line.
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45 * @param box the box to add
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46 */
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47 public void addLine(CompositeBox box) {
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48 endLine();
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49 getContext().addLine(box);
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50 }
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51
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52 /**
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53 * @see FlowContainerLayout#createNewLine()
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54 */
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55 protected void createNewLine() {
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56 currentLine = new NestedLine(cast(InlineFlow)getFlowFigure());
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57 setupLine(currentLine);
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58 }
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59
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60 /**
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61 * @see FlowContext#endLine()
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62 */
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63 public void endLine() {
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64 flush();
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65 getContext().endLine();
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66 }
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67
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68 /**
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69 * @see FlowContainerLayout#flush()
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70 */
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71 protected void flush() {
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72 if (currentLine !is null && currentLine.isOccupied()) {
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73 // We want to preserve the state when a linebox is being added
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74 bool sameLine = getContext().getContinueOnSameLine();
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75 getContext().addToCurrentLine(currentLine);
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76 (cast(InlineFlow)getFlowFigure()).getFragments().add(currentLine);
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77 currentLine = null;
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78 getContext().setContinueOnSameLine(sameLine);
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79 }
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80 }
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81
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82 /**
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83 * InlineFlowLayout gets this information from its context.
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84 * @see FlowContext#getContinueOnSameLine()
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85 */
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86 public bool getContinueOnSameLine() {
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87 return getContext().getContinueOnSameLine();
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88 }
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89
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90 /**
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91 * @see FlowContext#getWidthLookahead(FlowFigure, int[])
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92 */
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93 public void getWidthLookahead(FlowFigure child, int result[]) {
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94 List children = getFlowFigure().getChildren();
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95 int index = -1;
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96 if (child !is null)
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97 index = children.indexOf(child);
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98
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99 for (int i = index + 1; i < children.size(); i++)
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100 if ((cast(FlowFigure)children.get(i)).addLeadingWordRequirements(result))
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101 return;
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102
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103 getContext().getWidthLookahead(getFlowFigure(), result);
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104 }
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105
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106 /**
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107 * @see FlowContainerLayout#isCurrentLineOccupied()
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108 */
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109 public bool isCurrentLineOccupied() {
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110 return (currentLine !is null && !currentLine.getFragments().isEmpty())
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111 || getContext().isCurrentLineOccupied();
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112 }
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113
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114 /**
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115 * Clears out all fragments prior to the call to layoutChildren().
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116 */
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117 public void preLayout() {
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118 (cast(InlineFlow)getFlowFigure()).getFragments().clear();
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119 }
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120
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121 /**
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122 * InlineFlow passes this information to its context.
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123 * @see FlowContext#setContinueOnSameLine(bool)
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124 */
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125 public void setContinueOnSameLine(bool value) {
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126 getContext().setContinueOnSameLine(value);
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127 }
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128
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129 /**
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130 * Initializes the given LineBox. Called by createNewLine().
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131 * @param line The LineBox to initialize.
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132 */
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133 protected void setupLine(LineBox line) {
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134 line.setX(0);
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135 line.setRecommendedWidth(getContext().getRemainingLineWidth());
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136 }
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137
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138 }