Mercurial > projects > dwt-linux
annotate dwt/layout/RowLayout.d @ 240:ce446666f5a2
Update to SWT 3.4M7
author | Frank Benoit <benoit@tionex.de> |
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date | Mon, 12 May 2008 19:13:01 +0200 |
parents | 380bad9f6852 |
children | c0d810de7093 |
rev | line source |
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72 | 1 /******************************************************************************* |
51 | 2 * Copyright (c) 2000, 2006 IBM Corporation and others. |
3 * All rights reserved. This program and the accompanying materials | |
4 * are made available under the terms of the Eclipse Public License v1.0 | |
5 * which accompanies this distribution, and is available at | |
6 * http://www.eclipse.org/legal/epl-v10.html | |
7 * | |
8 * Contributors: | |
9 * IBM Corporation - initial API and implementation | |
72 | 10 * Port to the D programming language: |
11 * Frank Benoit <benoit@tionex.de> | |
51 | 12 *******************************************************************************/ |
13 module dwt.layout.RowLayout; | |
14 | |
71 | 15 import dwt.DWT; |
51 | 16 import dwt.graphics.Point; |
17 import dwt.graphics.Rectangle; | |
18 import dwt.widgets.Control; | |
19 import dwt.widgets.Layout; | |
20 import dwt.widgets.Composite; | |
21 import dwt.layout.RowData; | |
22 import tango.util.Convert; | |
23 import Math = tango.math.Math; | |
238 | 24 import dwt.dwthelper.utils; |
51 | 25 |
26 | |
27 /** | |
28 * Instances of this class determine the size and position of the | |
29 * children of a <code>Composite</code> by placing them either in | |
30 * horizontal rows or vertical columns within the parent <code>Composite</code>. | |
31 * <p> | |
32 * <code>RowLayout</code> aligns all controls in one row if the | |
33 * <code>type</code> is set to horizontal, and one column if it is | |
34 * set to vertical. It has the ability to wrap, and provides configurable | |
35 * margins and spacing. <code>RowLayout</code> has a number of configuration | |
36 * fields. In addition, the height and width of each control in a | |
37 * <code>RowLayout</code> can be specified by setting a <code>RowData</code> | |
38 * object into the control using <code>setLayoutData ()</code>. | |
39 * </p> | |
40 * <p> | |
41 * The following example code creates a <code>RowLayout</code>, sets all | |
42 * of its fields to non-default values, and then sets it into a | |
43 * <code>Shell</code>. | |
44 * <pre> | |
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45 * RowLayout rowLayout = new RowLayout(); |
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46 * rowLayout.wrap = false; |
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47 * rowLayout.pack = false; |
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48 * rowLayout.justify = true; |
71 | 49 * rowLayout.type = DWT.VERTICAL; |
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50 * rowLayout.marginLeft = 5; |
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51 * rowLayout.marginTop = 5; |
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52 * rowLayout.marginRight = 5; |
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53 * rowLayout.marginBottom = 5; |
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54 * rowLayout.spacing = 0; |
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55 * shell.setLayout(rowLayout); |
51 | 56 * </pre> |
57 * If you are using the default field values, you only need one line of code: | |
58 * <pre> | |
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59 * shell.setLayout(new RowLayout()); |
51 | 60 * </pre> |
61 * </p> | |
62 * | |
63 * @see RowData | |
64 */ | |
65 public final class RowLayout : Layout { | |
66 | |
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67 /** |
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68 * type specifies whether the layout places controls in rows or |
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69 * columns. |
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70 * |
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71 * The default value is HORIZONTAL. |
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72 * |
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73 * Possible values are: <ul> |
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74 * <li>HORIZONTAL: Position the controls horizontally from left to right</li> |
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75 * <li>VERTICAL: Position the controls vertically from top to bottom</li> |
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76 * </ul> |
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77 * |
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78 * @since 2.0 |
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79 */ |
71 | 80 public int type = DWT.HORIZONTAL; |
51 | 81 |
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82 /** |
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83 * marginWidth specifies the number of pixels of horizontal margin |
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84 * that will be placed along the left and right edges of the layout. |
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85 * |
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86 * The default value is 0. |
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87 * |
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88 * @since 3.0 |
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89 */ |
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90 public int marginWidth = 0; |
51 | 91 |
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92 /** |
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93 * marginHeight specifies the number of pixels of vertical margin |
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94 * that will be placed along the top and bottom edges of the layout. |
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95 * |
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96 * The default value is 0. |
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97 * |
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98 * @since 3.0 |
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99 */ |
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100 public int marginHeight = 0; |
51 | 101 |
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102 /** |
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103 * spacing specifies the number of pixels between the edge of one cell |
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104 * and the edge of its neighbouring cell. |
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105 * |
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106 * The default value is 3. |
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107 */ |
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108 public int spacing = 3; |
51 | 109 |
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110 /** |
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111 * wrap specifies whether a control will be wrapped to the next |
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112 * row if there is insufficient space on the current row. |
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113 * |
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114 * The default value is true. |
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115 */ |
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116 public bool wrap = true; |
51 | 117 |
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118 /** |
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119 * pack specifies whether all controls in the layout take |
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120 * their preferred size. If pack is false, all controls will |
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121 * have the same size which is the size required to accommodate the |
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122 * largest preferred height and the largest preferred width of all |
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123 * the controls in the layout. |
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124 * |
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125 * The default value is true. |
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126 */ |
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127 public bool pack = true; |
51 | 128 |
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129 /** |
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130 * fill specifies whether the controls in a row should be |
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131 * all the same height for horizontal layouts, or the same |
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132 * width for vertical layouts. |
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133 * |
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134 * The default value is false. |
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135 * |
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136 * @since 3.0 |
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137 */ |
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138 public bool fill = false; |
51 | 139 |
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140 /** |
240 | 141 * center specifies whether the controls in a row should be |
142 * centered vertically in each cell for horizontal layouts, | |
143 * or centered horizontally in each cell for vertical layouts. | |
144 * | |
145 * The default value is false. | |
146 * | |
147 * @since 3.4 | |
148 */ | |
149 public bool center = false; | |
150 | |
151 /** | |
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152 * justify specifies whether the controls in a row should be |
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153 * fully justified, with any extra space placed between the controls. |
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154 * |
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155 * The default value is false. |
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156 */ |
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157 public bool justify = false; |
51 | 158 |
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159 /** |
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160 * marginLeft specifies the number of pixels of horizontal margin |
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161 * that will be placed along the left edge of the layout. |
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162 * |
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163 * The default value is 3. |
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164 */ |
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165 public int marginLeft = 3; |
51 | 166 |
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167 /** |
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168 * marginTop specifies the number of pixels of vertical margin |
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169 * that will be placed along the top edge of the layout. |
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170 * |
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171 * The default value is 3. |
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172 */ |
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173 public int marginTop = 3; |
51 | 174 |
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175 /** |
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176 * marginRight specifies the number of pixels of horizontal margin |
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177 * that will be placed along the right edge of the layout. |
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178 * |
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179 * The default value is 3. |
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180 */ |
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181 public int marginRight = 3; |
51 | 182 |
59
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183 /** |
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184 * marginBottom specifies the number of pixels of vertical margin |
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185 * that will be placed along the bottom edge of the layout. |
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186 * |
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187 * The default value is 3. |
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188 */ |
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189 public int marginBottom = 3; |
51 | 190 |
191 /** | |
192 * Constructs a new instance of this class. | |
193 */ | |
194 public this () { | |
195 } | |
196 | |
197 /** | |
198 * Constructs a new instance of this class given the type. | |
199 * | |
200 * @param type the type of row layout | |
201 * | |
202 * @since 2.0 | |
203 */ | |
204 public this (int type) { | |
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205 this.type = type; |
51 | 206 } |
207 | |
201 | 208 override protected Point computeSize (Composite composite, int wHint, int hHint, bool flushCache_) { |
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209 Point extent; |
71 | 210 if (type is DWT.HORIZONTAL) { |
211 extent = layoutHorizontal (composite, false, (wHint !is DWT.DEFAULT) && wrap, wHint, flushCache_); | |
59
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212 } else { |
71 | 213 extent = layoutVertical (composite, false, (hHint !is DWT.DEFAULT) && wrap, hHint, flushCache_); |
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214 } |
71 | 215 if (wHint !is DWT.DEFAULT) extent.x = wHint; |
216 if (hHint !is DWT.DEFAULT) extent.y = hHint; | |
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217 return extent; |
51 | 218 } |
219 | |
220 Point computeSize (Control control, bool flushCache_) { | |
71 | 221 int wHint = DWT.DEFAULT, hHint = DWT.DEFAULT; |
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222 RowData data = cast(RowData) control.getLayoutData (); |
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223 if (data !is null) { |
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224 wHint = data.width; |
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225 hHint = data.height; |
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226 } |
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227 return control.computeSize (wHint, hHint, flushCache_); |
51 | 228 } |
229 | |
201 | 230 override protected bool flushCache (Control control) { |
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231 return true; |
51 | 232 } |
233 | |
238 | 234 String getName () { |
235 String string = this.classinfo.name; | |
236 int index = string.lastIndexOf('.'); | |
237 if (index is -1 ) return string; | |
51 | 238 return string[ index + 1 .. string.length ]; |
239 } | |
240 | |
201 | 241 override protected void layout (Composite composite, bool flushCache_) { |
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242 Rectangle clientArea = composite.getClientArea (); |
71 | 243 if (type is DWT.HORIZONTAL) { |
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244 layoutHorizontal (composite, true, wrap, clientArea.width, flushCache_); |
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245 } else { |
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246 layoutVertical (composite, true, wrap, clientArea.height, flushCache_); |
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247 } |
51 | 248 } |
249 | |
250 Point layoutHorizontal (Composite composite, bool move, bool wrap, int width, bool flushCache_) { | |
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251 Control [] children = composite.getChildren (); |
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252 int count = 0; |
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253 for (int i=0; i<children.length; i++) { |
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254 Control control = children [i]; |
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255 RowData data = cast(RowData) control.getLayoutData (); |
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256 if (data is null || !data.exclude) { |
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257 children [count++] = children [i]; |
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258 } |
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259 } |
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260 if (count is 0) { |
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261 return new Point (marginLeft + marginWidth * 2 + marginRight, marginTop + marginHeight * 2 + marginBottom); |
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262 } |
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263 int childWidth = 0, childHeight = 0, maxHeight = 0; |
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264 if (!pack) { |
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265 for (int i=0; i<count; i++) { |
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266 Control child = children [i]; |
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267 Point size = computeSize (child, flushCache_); |
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268 childWidth = Math.max (childWidth, size.x); |
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269 childHeight = Math.max (childHeight, size.y); |
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270 } |
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271 maxHeight = childHeight; |
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272 } |
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273 int clientX = 0, clientY = 0; |
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274 if (move) { |
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275 Rectangle rect = composite.getClientArea (); |
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276 clientX = rect.x; |
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277 clientY = rect.y; |
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278 } |
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279 int [] wraps = null; |
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280 bool wrapped = false; |
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281 Rectangle [] bounds = null; |
240 | 282 if (move && (justify || fill || center)) { |
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283 bounds = new Rectangle [count]; |
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284 wraps = new int [count]; |
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285 } |
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286 int maxX = 0, x = marginLeft + marginWidth, y = marginTop + marginHeight; |
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287 for (int i=0; i<count; i++) { |
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288 Control child = children [i]; |
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289 if (pack) { |
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290 Point size = computeSize (child, flushCache_); |
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291 childWidth = size.x; |
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292 childHeight = size.y; |
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293 } |
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294 if (wrap && (i !is 0) && (x + childWidth > width)) { |
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295 wrapped = true; |
240 | 296 if (move && (justify || fill || center)) wraps [i - 1] = maxHeight; |
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297 x = marginLeft + marginWidth; |
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298 y += spacing + maxHeight; |
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299 if (pack) maxHeight = 0; |
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300 } |
240 | 301 if (pack || fill || center) { |
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302 maxHeight = Math.max (maxHeight, childHeight); |
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303 } |
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304 if (move) { |
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305 int childX = x + clientX, childY = y + clientY; |
240 | 306 if (justify || fill || center) { |
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307 bounds [i] = new Rectangle (childX, childY, childWidth, childHeight); |
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308 } else { |
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309 child.setBounds (childX, childY, childWidth, childHeight); |
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310 } |
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311 } |
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312 x += spacing + childWidth; |
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313 maxX = Math.max (maxX, x); |
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314 } |
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315 maxX = Math.max (clientX + marginLeft + marginWidth, maxX - spacing); |
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316 if (!wrapped) maxX += marginRight + marginWidth; |
240 | 317 if (move && (justify || fill || center)) { |
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318 int space = 0, margin = 0; |
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319 if (!wrapped) { |
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320 space = Math.max (0, (width - maxX) / (count + 1)); |
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321 margin = Math.max (0, ((width - maxX) % (count + 1)) / 2); |
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322 } else { |
240 | 323 if (fill || justify || center) { |
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324 int last = 0; |
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325 if (count > 0) wraps [count - 1] = maxHeight; |
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326 for (int i=0; i<count; i++) { |
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327 if (wraps [i] !is 0) { |
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328 int wrapCount = i - last + 1; |
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329 if (justify) { |
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330 int wrapX = 0; |
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331 for (int j=last; j<=i; j++) { |
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332 wrapX += bounds [j].width + spacing; |
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333 } |
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334 space = Math.max (0, (width - wrapX) / (wrapCount + 1)); |
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335 margin = Math.max (0, ((width - wrapX) % (wrapCount + 1)) / 2); |
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336 } |
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337 for (int j=last; j<=i; j++) { |
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338 if (justify) bounds [j].x += (space * (j - last + 1)) + margin; |
240 | 339 if (fill) { |
340 bounds [j].height = wraps [i]; | |
341 } else { | |
342 if (center) { | |
343 bounds [j].y += Math.max (0, (wraps [i] - bounds [j].height) / 2); | |
344 } | |
345 } | |
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346 } |
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347 last = i + 1; |
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348 } |
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349 } |
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350 } |
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351 } |
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352 for (int i=0; i<count; i++) { |
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353 if (!wrapped) { |
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354 if (justify) bounds [i].x += (space * (i + 1)) + margin; |
240 | 355 if (fill) { |
356 bounds [i].height = maxHeight; | |
357 } else { | |
358 if (center) { | |
359 bounds [i].y += Math.max (0, (maxHeight - bounds [i].height) / 2); | |
360 } | |
361 } | |
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362 } |
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363 children [i].setBounds (bounds [i]); |
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364 } |
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365 } |
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366 return new Point (maxX, y + maxHeight + marginBottom + marginHeight); |
51 | 367 } |
368 | |
369 Point layoutVertical (Composite composite, bool move, bool wrap, int height, bool flushCache_) { | |
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370 Control [] children = composite.getChildren (); |
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371 int count = 0; |
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372 for (int i=0; i<children.length; i++) { |
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373 Control control = children [i]; |
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374 RowData data = cast(RowData) control.getLayoutData (); |
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375 if (data is null || !data.exclude) { |
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376 children [count++] = children [i]; |
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377 } |
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378 } |
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379 if (count is 0) { |
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380 return new Point (marginLeft + marginWidth * 2 + marginRight, marginTop + marginHeight * 2 + marginBottom); |
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381 } |
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382 int childWidth = 0, childHeight = 0, maxWidth = 0; |
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383 if (!pack) { |
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384 for (int i=0; i<count; i++) { |
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385 Control child = children [i]; |
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386 Point size = computeSize (child, flushCache_); |
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387 childWidth = Math.max (childWidth, size.x); |
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388 childHeight = Math.max (childHeight, size.y); |
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389 } |
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390 maxWidth = childWidth; |
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391 } |
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392 int clientX = 0, clientY = 0; |
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393 if (move) { |
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394 Rectangle rect = composite.getClientArea (); |
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395 clientX = rect.x; |
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396 clientY = rect.y; |
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397 } |
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398 int [] wraps = null; |
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399 bool wrapped = false; |
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400 Rectangle [] bounds = null; |
240 | 401 if (move && (justify || fill || center)) { |
59
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402 bounds = new Rectangle [count]; |
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403 wraps = new int [count]; |
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404 } |
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405 int maxY = 0, x = marginLeft + marginWidth, y = marginTop + marginHeight; |
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406 for (int i=0; i<count; i++) { |
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407 Control child = children [i]; |
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408 if (pack) { |
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409 Point size = computeSize (child, flushCache_); |
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410 childWidth = size.x; |
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411 childHeight = size.y; |
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412 } |
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413 if (wrap && (i !is 0) && (y + childHeight > height)) { |
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414 wrapped = true; |
240 | 415 if (move && (justify || fill || center)) wraps [i - 1] = maxWidth; |
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416 x += spacing + maxWidth; |
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417 y = marginTop + marginHeight; |
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418 if (pack) maxWidth = 0; |
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419 } |
240 | 420 if (pack || fill || center) { |
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421 maxWidth = Math.max (maxWidth, childWidth); |
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422 } |
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423 if (move) { |
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424 int childX = x + clientX, childY = y + clientY; |
240 | 425 if (justify || fill || center) { |
59
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426 bounds [i] = new Rectangle (childX, childY, childWidth, childHeight); |
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427 } else { |
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428 child.setBounds (childX, childY, childWidth, childHeight); |
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429 } |
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430 } |
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431 y += spacing + childHeight; |
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432 maxY = Math.max (maxY, y); |
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433 } |
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434 maxY = Math.max (clientY + marginTop + marginHeight, maxY - spacing); |
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435 if (!wrapped) maxY += marginBottom + marginHeight; |
240 | 436 if (move && (justify || fill || center)) { |
59
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437 int space = 0, margin = 0; |
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438 if (!wrapped) { |
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439 space = Math.max (0, (height - maxY) / (count + 1)); |
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440 margin = Math.max (0, ((height - maxY) % (count + 1)) / 2); |
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441 } else { |
240 | 442 if (fill || justify || center) { |
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443 int last = 0; |
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444 if (count > 0) wraps [count - 1] = maxWidth; |
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445 for (int i=0; i<count; i++) { |
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446 if (wraps [i] !is 0) { |
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447 int wrapCount = i - last + 1; |
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448 if (justify) { |
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449 int wrapY = 0; |
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450 for (int j=last; j<=i; j++) { |
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451 wrapY += bounds [j].height + spacing; |
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452 } |
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453 space = Math.max (0, (height - wrapY) / (wrapCount + 1)); |
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454 margin = Math.max (0, ((height - wrapY) % (wrapCount + 1)) / 2); |
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455 } |
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456 for (int j=last; j<=i; j++) { |
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457 if (justify) bounds [j].y += (space * (j - last + 1)) + margin; |
240 | 458 if (fill) { |
459 bounds [j].width = wraps [i]; | |
460 } else { | |
461 if (center) { | |
462 bounds [j].x += Math.max (0, (wraps [i] - bounds [j].width) / 2); | |
463 } | |
464 } | |
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465 } |
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466 last = i + 1; |
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467 } |
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468 } |
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469 } |
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470 } |
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471 for (int i=0; i<count; i++) { |
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472 if (!wrapped) { |
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473 if (justify) bounds [i].y += (space * (i + 1)) + margin; |
240 | 474 if (fill) { |
475 bounds [i].width = maxWidth; | |
476 } else { | |
477 if (center) { | |
478 bounds [i].x += Math.max (0, (maxWidth - bounds [i].width) / 2); | |
479 } | |
480 } | |
481 | |
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482 } |
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483 children [i].setBounds (bounds [i]); |
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484 } |
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485 } |
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486 return new Point (x + maxWidth + marginRight + marginWidth, maxY); |
51 | 487 } |
488 | |
489 /** | |
490 * Returns a string containing a concise, human-readable | |
491 * description of the receiver. | |
492 * | |
493 * @return a string representation of the layout | |
494 */ | |
238 | 495 override public String toString () { |
496 String string = getName ()~" {"; | |
71 | 497 string ~= "type="~((type !is DWT.HORIZONTAL) ? "DWT.VERTICAL" : "DWT.HORIZONTAL")~" "; |
238 | 498 if (marginWidth !is 0) string ~= "marginWidth="~to!(String)(marginWidth)~" "; |
499 if (marginHeight !is 0) string ~= "marginHeight="~to!(String)(marginHeight)~" "; | |
500 if (marginLeft !is 0) string ~= "marginLeft="~to!(String)(marginLeft)~" "; | |
501 if (marginTop !is 0) string ~= "marginTop="~to!(String)(marginTop)~" "; | |
502 if (marginRight !is 0) string ~= "marginRight="~to!(String)(marginRight)~" "; | |
503 if (marginBottom !is 0) string ~= "marginBottom="~to!(String)(marginBottom)~" "; | |
504 if (spacing !is 0) string ~= "spacing="~to!(String)(spacing)~" "; | |
505 string ~= "wrap="~to!(String)(wrap)~" "; | |
506 string ~= "pack="~to!(String)(pack)~" "; | |
507 string ~= "fill="~to!(String)(fill)~" "; | |
508 string ~= "justify="~to!(String)(justify)~" "; | |
509 string = string.trim(); | |
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510 string ~= "}"; |
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511 return string; |
51 | 512 } |
513 } |