Mercurial > projects > dwt-addons
annotate dwtx/draw2d/BorderLayout.d @ 192:c3583c6ec027
Added missing default cases for switch statements
author | Frank Benoit <benoit@tionex.de> |
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date | Mon, 03 Nov 2008 22:52:26 +0100 |
parents | 2d6540440fe6 |
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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.BorderLayout; |
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14 |
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15 import dwt.dwthelper.utils; |
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16 |
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17 import dwtx.draw2d.geometry.Dimension; |
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18 import dwtx.draw2d.geometry.Insets; |
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19 import dwtx.draw2d.geometry.Rectangle; |
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20 import dwtx.draw2d.AbstractHintLayout; |
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21 import dwtx.draw2d.IFigure; |
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22 import dwtx.draw2d.PositionConstants; |
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23 |
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24 /** |
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25 * @author Pratik Shah |
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26 */ |
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27 public class BorderLayout |
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28 : AbstractHintLayout |
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29 { |
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30 |
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31 /** |
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32 * Constant to be used as a constraint for child figures |
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33 */ |
103
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34 private static Integer CENTER_; |
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35 public static Integer CENTER(){ |
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36 if( !initStaticCtor_done ) initStaticCtor(); |
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37 return CENTER_; |
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38 } |
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39 /** |
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40 * Constant to be used as a constraint for child figures |
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41 */ |
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42 private static Integer TOP_; |
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43 public static Integer TOP(){ |
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44 if( !initStaticCtor_done ) initStaticCtor(); |
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45 return TOP_; |
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46 } |
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47 /** |
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48 * Constant to be used as a constraint for child figures |
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49 */ |
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50 private static Integer BOTTOM_; |
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51 public static Integer BOTTOM(){ |
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52 if( !initStaticCtor_done ) initStaticCtor(); |
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53 return BOTTOM_; |
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54 } |
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55 /** |
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56 * Constant to be used as a constraint for child figures |
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57 */ |
103
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58 private static Integer LEFT_; |
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59 public static Integer LEFT(){ |
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60 if( !initStaticCtor_done ) initStaticCtor(); |
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61 return LEFT_; |
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62 } |
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63 /** |
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64 * Constant to be used as a constraint for child figures |
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65 */ |
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66 private static Integer RIGHT_; |
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67 public static Integer RIGHT(){ |
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68 if( !initStaticCtor_done ) initStaticCtor(); |
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69 return RIGHT_; |
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70 } |
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71 |
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72 private static bool initStaticCtor_done = false; |
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73 private static void initStaticCtor(){ |
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74 synchronized( BorderLayout.classinfo ){ |
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75 if( !initStaticCtor_done ){ |
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76 CENTER_ = new Integer(PositionConstants.CENTER); |
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77 TOP_ = new Integer(PositionConstants.TOP); |
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78 BOTTOM_ = new Integer(PositionConstants.BOTTOM); |
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79 LEFT_ = new Integer(PositionConstants.LEFT); |
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80 RIGHT_ = new Integer(PositionConstants.RIGHT); |
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81 initStaticCtor_done = true; |
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82 } |
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83 } |
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84 } |
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85 |
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86 private IFigure center, left, top, bottom, right; |
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87 private int vGap = 0, hGap = 0; |
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88 |
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89 /** |
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90 * @see dwtx.draw2d.AbstractHintLayout#calculateMinimumSize(IFigure, int, int) |
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91 */ |
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92 protected Dimension calculateMinimumSize(IFigure container, int wHint, int hHint) { |
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93 int minWHint = 0, minHHint = 0; |
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94 if (wHint < 0) { |
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95 minWHint = -1; |
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96 } |
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97 if (hHint < 0) { |
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98 minHHint = -1; |
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99 } |
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100 Insets border = container.getInsets(); |
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101 wHint = Math.max(minWHint, wHint - border.getWidth()); |
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102 hHint = Math.max(minHHint, hHint - border.getHeight()); |
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103 Dimension minSize = new Dimension(); |
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104 int middleRowWidth = 0, middleRowHeight = 0; |
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105 int rows = 0, columns = 0; |
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106 |
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107 if (top !is null && top.isVisible()) { |
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108 Dimension childSize = top.getMinimumSize(wHint, hHint); |
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109 hHint = Math.max(minHHint, hHint - (childSize.height + vGap)); |
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110 minSize.setSize(childSize); |
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111 rows += 1; |
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112 } |
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113 if (bottom !is null && bottom.isVisible()) { |
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114 Dimension childSize = bottom.getMinimumSize(wHint, hHint); |
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115 hHint = Math.max(minHHint, hHint - (childSize.height + vGap)); |
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116 minSize.width = Math.max(minSize.width, childSize.width); |
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117 minSize.height += childSize.height; |
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118 rows += 1; |
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119 } |
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120 if (left !is null && left.isVisible()) { |
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121 Dimension childSize = left.getMinimumSize(wHint, hHint); |
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122 middleRowWidth = childSize.width; |
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123 middleRowHeight = childSize.height; |
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124 wHint = Math.max(minWHint, wHint - (childSize.width + hGap)); |
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125 columns += 1; |
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126 } |
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127 if (right !is null && right.isVisible()) { |
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128 Dimension childSize = right.getMinimumSize(wHint, hHint); |
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129 middleRowWidth += childSize.width; |
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130 middleRowHeight = Math.max(childSize.height, middleRowHeight); |
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131 wHint = Math.max(minWHint, wHint - (childSize.width + hGap)); |
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132 columns += 1; |
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133 } |
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134 if (center !is null && center.isVisible()) { |
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135 Dimension childSize = center.getMinimumSize(wHint, hHint); |
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136 middleRowWidth += childSize.width; |
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137 middleRowHeight = Math.max(childSize.height, middleRowHeight); |
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138 columns += 1; |
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139 } |
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140 |
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141 rows += columns > 0 ? 1 : 0; |
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142 // Add spacing, insets, and the size of the middle row |
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143 minSize.height += middleRowHeight + border.getHeight() + ((rows - 1) * vGap); |
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144 minSize.width = Math.max(minSize.width, middleRowWidth) + border.getWidth() |
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145 + ((columns - 1) * hGap); |
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146 |
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147 return minSize; |
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148 } |
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149 |
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150 /** |
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151 * @see AbstractLayout#calculatePreferredSize(IFigure, int, int) |
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152 */ |
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153 protected Dimension calculatePreferredSize(IFigure container, int wHint, int hHint) { |
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154 int minWHint = 0, minHHint = 0; |
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155 if (wHint < 0) |
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156 minWHint = -1; |
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157 |
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158 if (hHint < 0) |
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159 minHHint = -1; |
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160 |
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161 Insets border = container.getInsets(); |
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162 wHint = Math.max(minWHint, wHint - border.getWidth()); |
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163 hHint = Math.max(minHHint, hHint - border.getHeight()); |
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164 Dimension prefSize = new Dimension(); |
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165 int middleRowWidth = 0, middleRowHeight = 0; |
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166 int rows = 0, columns = 0; |
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167 |
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168 if (top !is null && top.isVisible()) { |
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169 Dimension childSize = top.getPreferredSize(wHint, hHint); |
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170 hHint = Math.max(minHHint, hHint - (childSize.height + vGap)); |
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171 prefSize.setSize(childSize); |
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172 rows += 1; |
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173 } |
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174 if (bottom !is null && bottom.isVisible()) { |
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175 Dimension childSize = bottom.getPreferredSize(wHint, hHint); |
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176 hHint = Math.max(minHHint, hHint - (childSize.height + vGap)); |
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177 prefSize.width = Math.max(prefSize.width, childSize.width); |
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178 prefSize.height += childSize.height; |
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179 rows += 1; |
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180 } |
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181 if (left !is null && left.isVisible()) { |
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182 Dimension childSize = left.getPreferredSize(wHint, hHint); |
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183 middleRowWidth = childSize.width; |
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184 middleRowHeight = childSize.height; |
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185 wHint = Math.max(minWHint, wHint - (childSize.width + hGap)); |
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186 columns += 1; |
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187 } |
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188 if (right !is null && right.isVisible()) { |
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189 Dimension childSize = right.getPreferredSize(wHint, hHint); |
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190 middleRowWidth += childSize.width; |
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191 middleRowHeight = Math.max(childSize.height, middleRowHeight); |
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192 wHint = Math.max(minWHint, wHint - (childSize.width + hGap)); |
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193 columns += 1; |
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194 } |
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195 if (center !is null && center.isVisible()) { |
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196 Dimension childSize = center.getPreferredSize(wHint, hHint); |
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197 middleRowWidth += childSize.width; |
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198 middleRowHeight = Math.max(childSize.height, middleRowHeight); |
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199 columns += 1; |
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200 } |
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201 |
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202 rows += columns > 0 ? 1 : 0; |
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203 // Add spacing, insets, and the size of the middle row |
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204 prefSize.height += middleRowHeight + border.getHeight() + ((rows - 1) * vGap); |
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205 prefSize.width = Math.max(prefSize.width, middleRowWidth) + border.getWidth() |
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206 + ((columns - 1) * hGap); |
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207 |
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208 return prefSize; |
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209 } |
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210 |
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211 /** |
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212 * @see dwtx.draw2d.LayoutManager#layout(IFigure) |
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213 */ |
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214 public void layout(IFigure container) { |
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215 Rectangle area = container.getClientArea(); |
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216 Rectangle rect = new Rectangle(); |
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217 |
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218 Dimension childSize; |
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219 |
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220 if (top !is null && top.isVisible()) { |
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221 childSize = top.getPreferredSize(area.width, -1); |
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222 rect.setLocation(area.x, area.y); |
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223 rect.setSize(childSize); |
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224 rect.width = area.width; |
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225 top.setBounds(rect); |
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226 area.y += rect.height + vGap; |
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227 area.height -= rect.height + vGap; |
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228 } |
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229 if (bottom !is null && bottom.isVisible()) { |
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230 childSize = bottom.getPreferredSize(Math.max(area.width, 0), -1); |
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231 rect.setSize(childSize); |
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232 rect.width = area.width; |
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233 rect.setLocation(area.x, area.y + area.height - rect.height); |
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234 bottom.setBounds(rect); |
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235 area.height -= rect.height + vGap; |
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236 } |
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237 if (left !is null && left.isVisible()) { |
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238 childSize = left.getPreferredSize(-1, Math.max(0, area.height)); |
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239 rect.setLocation(area.x, area.y); |
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240 rect.width = childSize.width; |
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241 rect.height = Math.max(0, area.height); |
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242 left.setBounds(rect); |
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243 area.x += rect.width + hGap; |
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244 area.width -= rect.width + hGap; |
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245 } |
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246 if (right !is null && right.isVisible()) { |
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247 childSize = right.getPreferredSize(-1, Math.max(0, area.height)); |
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248 rect.width = childSize.width; |
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249 rect.height = Math.max(0, area.height); |
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250 rect.setLocation(area.x + area.width - rect.width, area.y); |
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251 right.setBounds(rect); |
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252 area.width -= rect.width + hGap; |
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253 } |
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254 if (center !is null && center.isVisible()) { |
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255 if (area.width < 0) |
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256 area.width = 0; |
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257 if (area.height < 0) |
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258 area.height = 0; |
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259 center.setBounds(area); |
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260 } |
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261 } |
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262 |
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263 /** |
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264 * @see dwtx.draw2d.AbstractLayout#remove(IFigure) |
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265 */ |
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266 public void remove(IFigure child) { |
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267 if (center is child) { |
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268 center = null; |
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269 } else if (top is child) { |
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270 top = null; |
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271 } else if (bottom is child) { |
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272 bottom = null; |
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273 } else if (right is child) { |
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274 right = null; |
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275 } else if (left is child) { |
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276 left = null; |
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277 } |
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278 } |
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279 |
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280 /** |
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281 * Sets the location of hte given child in this layout. Valid constraints: |
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282 * <UL> |
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283 * <LI>{@link #CENTER}</LI> |
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284 * <LI>{@link #TOP}</LI> |
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285 * <LI>{@link #BOTTOM}</LI> |
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286 * <LI>{@link #LEFT}</LI> |
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287 * <LI>{@link #RIGHT}</LI> |
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288 * <LI><code>null</code> (to remove a child's constraint)</LI> |
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289 * </UL> |
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290 * |
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291 * <p> |
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292 * Ensure that the given Figure is indeed a child of the Figure on which this layout has |
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293 * been set. Proper behaviour cannot be guaranteed if that is not the case. Also ensure |
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294 * that every child has a valid constraint. |
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295 * </p> |
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296 * <p> |
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297 * Passing a <code>null</code> constraint will invoke {@link #remove(IFigure)}. |
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298 * </p> |
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299 * <p> |
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300 * If the given child was assigned another constraint earlier, it will be re-assigned to |
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301 * the new constraint. If there is another child with the given constraint, it will be |
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302 * over-ridden so that the given child now has that constraint. |
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303 * </p> |
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304 * |
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305 * @see dwtx.draw2d.AbstractLayout#setConstraint(IFigure, Object) |
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306 */ |
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307 public void setConstraint(IFigure child, Object constraint) { |
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308 remove(child); |
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309 super.setConstraint(child, constraint); |
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310 if (constraint is null) { |
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311 return; |
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312 } |
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313 |
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314 switch ((cast(Integer) constraint).intValue()) { |
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315 case PositionConstants.CENTER : |
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316 center = child; |
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317 break; |
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318 case PositionConstants.TOP : |
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319 top = child; |
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320 break; |
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321 case PositionConstants.BOTTOM : |
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322 bottom = child; |
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323 break; |
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324 case PositionConstants.RIGHT : |
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325 right = child; |
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326 break; |
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327 case PositionConstants.LEFT : |
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328 left = child; |
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329 break; |
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330 default : |
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331 break; |
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332 } |
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333 } |
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334 |
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335 /** |
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336 * Sets the horizontal spacing to be used between the children. Default is 0. |
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337 * |
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338 * @param gap The horizonal spacing |
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339 */ |
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340 public void setHorizontalSpacing(int gap) { |
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341 hGap = gap; |
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342 } |
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343 |
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344 /** |
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345 * Sets the vertical spacing ot be used between the children. Default is 0. |
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346 * |
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347 * @param gap The vertical spacing |
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348 */ |
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349 public void setVerticalSpacing(int gap) { |
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350 vGap = gap; |
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351 } |
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352 |
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353 } |