Mercurial > projects > dwt-mac
annotate dwt/layout/FormData.d @ 40:fbe68c33eeee
Sync layout with dwt-linux
author | Frank Benoit <benoit@tionex.de> |
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date | Tue, 07 Oct 2008 14:41:31 +0200 |
parents | e831403a80a9 |
children | d8635bb48c7c |
rev | line source |
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1 /******************************************************************************* |
40 | 2 * Copyright (c) 2000, 2008 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 |
40 | 10 * Port to the D programming language: |
11 * Frank Benoit <benoit@tionex.de> | |
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12 *******************************************************************************/ |
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13 module dwt.layout.FormData; |
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14 |
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15 |
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16 import dwt.DWT; |
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17 import dwt.graphics.Point; |
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18 import dwt.widgets.Control; |
40 | 19 import dwt.layout.FormAttachment; |
20 | |
21 import tango.util.Convert; | |
22 import dwt.dwthelper.utils; | |
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23 |
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24 /** |
40 | 25 * Instances of this class are used to define the attachments |
26 * of a control in a <code>FormLayout</code>. | |
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27 * <p> |
40 | 28 * To set a <code>FormData</code> object into a control, you use the |
29 * <code>setLayoutData ()</code> method. To define attachments for the | |
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30 * <code>FormData</code>, set the fields directly, like this: |
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31 * <pre> |
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32 * FormData data = new FormData(); |
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33 * data.left = new FormAttachment(0,5); |
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34 * data.right = new FormAttachment(100,-5); |
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35 * button.setLayoutData(formData); |
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36 * </pre> |
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37 * </p> |
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38 * <p> |
40 | 39 * <code>FormData</code> contains the <code>FormAttachments</code> for |
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40 * each edge of the control that the <code>FormLayout</code> uses to |
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41 * determine the size and position of the control. <code>FormData</code> |
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42 * objects also allow you to set the width and height of controls within |
40 | 43 * a <code>FormLayout</code>. |
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44 * </p> |
40 | 45 * |
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46 * @see FormLayout |
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47 * @see FormAttachment |
40 | 48 * @see <a href="http://www.eclipse.org/swt/">Sample code and further information</a> |
49 * | |
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50 * @since 2.0 |
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51 */ |
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52 public final class FormData { |
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53 /** |
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54 * width specifies the preferred width in pixels. This value |
40 | 55 * is the wHint passed into Control.computeSize(int, int, bool) |
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56 * to determine the preferred size of the control. |
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57 * |
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58 * The default value is DWT.DEFAULT. |
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59 * |
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60 * @see Control#computeSize(int, int, bool) |
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61 */ |
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62 public int width = DWT.DEFAULT; |
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63 /** |
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64 * height specifies the preferred height in pixels. This value |
40 | 65 * is the hHint passed into Control.computeSize(int, int, bool) |
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66 * to determine the preferred size of the control. |
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67 * |
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68 * The default value is DWT.DEFAULT. |
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69 * |
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70 * @see Control#computeSize(int, int, bool) |
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71 */ |
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72 public int height = DWT.DEFAULT; |
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73 /** |
40 | 74 * left specifies the attachment of the left side of |
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75 * the control. |
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76 */ |
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77 public FormAttachment left; |
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78 /** |
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79 * right specifies the attachment of the right side of |
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80 * the control. |
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81 */ |
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82 public FormAttachment right; |
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83 /** |
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84 * top specifies the attachment of the top of the control. |
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85 */ |
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86 public FormAttachment top; |
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87 /** |
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88 * bottom specifies the attachment of the bottom of the |
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89 * control. |
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90 */ |
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91 public FormAttachment bottom; |
40 | 92 |
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93 int cacheWidth = -1, cacheHeight = -1; |
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94 int defaultWhint, defaultHhint, defaultWidth = -1, defaultHeight = -1; |
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95 int currentWhint, currentHhint, currentWidth = -1, currentHeight = -1; |
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96 FormAttachment cacheLeft, cacheRight, cacheTop, cacheBottom; |
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97 bool isVisited, needed; |
40 | 98 |
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99 /** |
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100 * Constructs a new instance of FormData using |
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101 * default values. |
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102 */ |
5 | 103 public this () { |
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104 } |
40 | 105 |
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106 /** |
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107 * Constructs a new instance of FormData according to the parameters. |
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108 * A value of DWT.DEFAULT indicates that no minimum width or |
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109 * no minimum height is specified. |
40 | 110 * |
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111 * @param width a minimum width for the control |
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112 * @param height a minimum height for the control |
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113 */ |
5 | 114 public this (int width, int height) { |
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115 this.width = width; |
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116 this.height = height; |
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117 } |
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118 |
40 | 119 void computeSize (Control control, int wHint, int hHint, bool flushCache_) { |
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120 if (cacheWidth !is -1 && cacheHeight !is -1) return; |
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121 if (wHint is this.width && hHint is this.height) { |
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122 if (defaultWidth is -1 || defaultHeight is -1 || wHint !is defaultWhint || hHint !is defaultHhint) { |
40 | 123 Point size = control.computeSize (wHint, hHint, flushCache_); |
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124 defaultWhint = wHint; |
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125 defaultHhint = hHint; |
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126 defaultWidth = size.x; |
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127 defaultHeight = size.y; |
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128 } |
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129 cacheWidth = defaultWidth; |
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130 cacheHeight = defaultHeight; |
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131 return; |
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132 } |
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133 if (currentWidth is -1 || currentHeight is -1 || wHint !is currentWhint || hHint !is currentHhint) { |
40 | 134 Point size = control.computeSize (wHint, hHint, flushCache_); |
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135 currentWhint = wHint; |
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136 currentHhint = hHint; |
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137 currentWidth = size.x; |
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138 currentHeight = size.y; |
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139 } |
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140 cacheWidth = currentWidth; |
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141 cacheHeight = currentHeight; |
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142 } |
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143 |
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144 void flushCache () { |
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145 cacheWidth = cacheHeight = -1; |
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146 defaultHeight = defaultWidth = -1; |
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147 currentHeight = currentWidth = -1; |
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148 } |
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149 |
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150 int getWidth (Control control, bool flushCache) { |
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151 needed = true; |
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152 computeSize (control, width, height, flushCache); |
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153 return cacheWidth; |
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154 } |
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155 |
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156 int getHeight (Control control, bool flushCache) { |
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157 computeSize (control, width, height, flushCache); |
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158 return cacheHeight; |
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159 } |
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160 |
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161 FormAttachment getBottomAttachment (Control control, int spacing, bool flushCache) { |
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162 if (cacheBottom !is null) return cacheBottom; |
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163 if (isVisited) return cacheBottom = new FormAttachment (0, getHeight (control, flushCache)); |
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164 if (bottom is null) { |
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165 if (top is null) return cacheBottom = new FormAttachment (0, getHeight (control, flushCache)); |
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166 return cacheBottom = getTopAttachment (control, spacing, flushCache).plus (getHeight (control, flushCache)); |
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167 } |
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168 Control bottomControl = bottom.control; |
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169 if (bottomControl !is null) { |
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170 if (bottomControl.isDisposed ()) { |
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171 bottom.control = bottomControl = null; |
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172 } else { |
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173 if (bottomControl.getParent () !is control.getParent ()) { |
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174 bottomControl = null; |
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175 } |
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176 } |
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177 } |
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178 if (bottomControl is null) return cacheBottom = bottom; |
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179 isVisited = true; |
7 | 180 FormData bottomData = cast(FormData) bottomControl.getLayoutData (); |
0
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181 FormAttachment bottomAttachment = bottomData.getBottomAttachment (bottomControl, spacing, flushCache); |
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182 switch (bottom.alignment) { |
40 | 183 case DWT.BOTTOM: |
0
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184 cacheBottom = bottomAttachment.plus (bottom.offset); |
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185 break; |
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186 case DWT.CENTER: { |
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187 FormAttachment topAttachment = bottomData.getTopAttachment (bottomControl, spacing, flushCache); |
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188 FormAttachment bottomHeight = bottomAttachment.minus (topAttachment); |
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189 cacheBottom = bottomAttachment.minus (bottomHeight.minus (getHeight (control, flushCache)).divide (2)); |
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190 break; |
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191 } |
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192 default: { |
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193 FormAttachment topAttachment = bottomData.getTopAttachment (bottomControl, spacing, flushCache); |
40 | 194 cacheBottom = topAttachment.plus (bottom.offset - spacing); |
0
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195 break; |
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196 } |
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197 } |
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198 isVisited = false; |
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199 return cacheBottom; |
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200 } |
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201 |
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202 FormAttachment getLeftAttachment (Control control, int spacing, bool flushCache) { |
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203 if (cacheLeft !is null) return cacheLeft; |
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204 if (isVisited) return cacheLeft = new FormAttachment (0, 0); |
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205 if (left is null) { |
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206 if (right is null) return cacheLeft = new FormAttachment (0, 0); |
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207 return cacheLeft = getRightAttachment (control, spacing, flushCache).minus (getWidth (control, flushCache)); |
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208 } |
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209 Control leftControl = left.control; |
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210 if (leftControl !is null) { |
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211 if (leftControl.isDisposed ()) { |
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212 left.control = leftControl = null; |
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213 } else { |
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214 if (leftControl.getParent () !is control.getParent ()) { |
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215 leftControl = null; |
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216 } |
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217 } |
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218 } |
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219 if (leftControl is null) return cacheLeft = left; |
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220 isVisited = true; |
7 | 221 FormData leftData = cast(FormData) leftControl.getLayoutData (); |
0
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222 FormAttachment leftAttachment = leftData.getLeftAttachment (leftControl, spacing, flushCache); |
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223 switch (left.alignment) { |
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224 case DWT.LEFT: |
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225 cacheLeft = leftAttachment.plus (left.offset); |
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226 break; |
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227 case DWT.CENTER: { |
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228 FormAttachment rightAttachment = leftData.getRightAttachment (leftControl, spacing, flushCache); |
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229 FormAttachment leftWidth = rightAttachment.minus (leftAttachment); |
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230 cacheLeft = leftAttachment.plus (leftWidth.minus (getWidth (control, flushCache)).divide (2)); |
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231 break; |
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232 } |
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233 default: { |
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234 FormAttachment rightAttachment = leftData.getRightAttachment (leftControl, spacing, flushCache); |
40 | 235 cacheLeft = rightAttachment.plus (left.offset + spacing); |
0
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236 } |
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237 } |
40 | 238 isVisited = false; |
0
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239 return cacheLeft; |
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240 } |
40 | 241 |
0
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242 String getName () { |
40 | 243 String string = this.classinfo.name; |
244 int index = string.lastIndexOf( '.'); | |
245 if (index is -1 ) return string; | |
246 return string[ index + 1 .. string.length ]; | |
0
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247 } |
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248 |
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249 FormAttachment getRightAttachment (Control control, int spacing, bool flushCache) { |
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250 if (cacheRight !is null) return cacheRight; |
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251 if (isVisited) return cacheRight = new FormAttachment (0, getWidth (control, flushCache)); |
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252 if (right is null) { |
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253 if (left is null) return cacheRight = new FormAttachment (0, getWidth (control, flushCache)); |
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254 return cacheRight = getLeftAttachment (control, spacing, flushCache).plus (getWidth (control, flushCache)); |
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255 } |
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256 Control rightControl = right.control; |
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257 if (rightControl !is null) { |
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258 if (rightControl.isDisposed ()) { |
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259 right.control = rightControl = null; |
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260 } else { |
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261 if (rightControl.getParent () !is control.getParent ()) { |
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262 rightControl = null; |
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263 } |
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264 } |
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265 } |
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266 if (rightControl is null) return cacheRight = right; |
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267 isVisited = true; |
7 | 268 FormData rightData = cast(FormData) rightControl.getLayoutData (); |
0
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269 FormAttachment rightAttachment = rightData.getRightAttachment (rightControl, spacing, flushCache); |
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270 switch (right.alignment) { |
40 | 271 case DWT.RIGHT: |
0
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272 cacheRight = rightAttachment.plus (right.offset); |
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273 break; |
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274 case DWT.CENTER: { |
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275 FormAttachment leftAttachment = rightData.getLeftAttachment (rightControl, spacing, flushCache); |
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276 FormAttachment rightWidth = rightAttachment.minus (leftAttachment); |
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277 cacheRight = rightAttachment.minus (rightWidth.minus (getWidth (control, flushCache)).divide (2)); |
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278 break; |
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279 } |
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280 default: { |
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281 FormAttachment leftAttachment = rightData.getLeftAttachment (rightControl, spacing, flushCache); |
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282 cacheRight = leftAttachment.plus (right.offset - spacing); |
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283 break; |
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284 } |
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285 } |
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286 isVisited = false; |
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287 return cacheRight; |
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288 } |
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289 |
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290 FormAttachment getTopAttachment (Control control, int spacing, bool flushCache) { |
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291 if (cacheTop !is null) return cacheTop; |
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292 if (isVisited) return cacheTop = new FormAttachment (0, 0); |
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293 if (top is null) { |
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294 if (bottom is null) return cacheTop = new FormAttachment (0, 0); |
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295 return cacheTop = getBottomAttachment (control, spacing, flushCache).minus (getHeight (control, flushCache)); |
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296 } |
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297 Control topControl = top.control; |
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298 if (topControl !is null) { |
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299 if (topControl.isDisposed ()) { |
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300 top.control = topControl = null; |
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301 } else { |
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302 if (topControl.getParent () !is control.getParent ()) { |
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303 topControl = null; |
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304 } |
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305 } |
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306 } |
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307 if (topControl is null) return cacheTop = top; |
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308 isVisited = true; |
7 | 309 FormData topData = cast(FormData) topControl.getLayoutData (); |
0
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310 FormAttachment topAttachment = topData.getTopAttachment (topControl, spacing, flushCache); |
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311 switch (top.alignment) { |
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312 case DWT.TOP: |
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313 cacheTop = topAttachment.plus (top.offset); |
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314 break; |
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315 case DWT.CENTER: { |
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316 FormAttachment bottomAttachment = topData.getBottomAttachment (topControl, spacing, flushCache); |
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317 FormAttachment topHeight = bottomAttachment.minus (topAttachment); |
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318 cacheTop = topAttachment.plus (topHeight.minus (getHeight (control, flushCache)).divide (2)); |
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319 break; |
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320 } |
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321 default: { |
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322 FormAttachment bottomAttachment = topData.getBottomAttachment (topControl, spacing, flushCache); |
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323 cacheTop = bottomAttachment.plus (top.offset + spacing); |
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324 break; |
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325 } |
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326 } |
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327 isVisited = false; |
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328 return cacheTop; |
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329 } |
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330 |
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331 /** |
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332 * Returns a string containing a concise, human-readable |
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333 * description of the receiver. |
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334 * |
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335 * @return a string representation of the FormData object |
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336 */ |
40 | 337 override public String toString () { |
338 String string = getName()~" {"; | |
339 if (width !is DWT.DEFAULT) string ~= "width="~to!(String)(width)~" "; | |
340 if (height !is DWT.DEFAULT) string ~= "height="~to!(String)(height)~" "; | |
341 if (left !is null) string ~= "left="~to!(String)(left)~" "; | |
342 if (right !is null) string ~= "right="~to!(String)(right)~" "; | |
343 if (top !is null) string ~= "top="~to!(String)(top)~" "; | |
344 if (bottom !is null) string ~= "bottom="~to!(String)(bottom)~" "; | |
0
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345 string = string.trim(); |
40 | 346 string ~= "}"; |
0
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347 return string; |
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348 } |
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349 |
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350 } |