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annotate dwt/widgets/Group.d @ 46:cfa563df4fdd

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Updated Widget and Display to 3.514
author Jacob Carlborg <doob@me.com>
date Fri, 05 Dec 2008 16:00:41 +0100
parents d8635bb48c7c
children 39340f7612f8
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1 /*******************************************************************************
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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
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10 *******************************************************************************/
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11 module dwt.widgets.Group;
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12
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13 import dwt.dwthelper.utils;
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16 import dwt.DWT;
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17 import dwt.DWTException;
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18 import dwt.graphics.Rectangle;
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19 import dwt.internal.cocoa.NSBox;
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20 import dwt.internal.cocoa.NSFont;
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21 import dwt.internal.cocoa.NSRect;
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22 import dwt.internal.cocoa.NSSize;
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23 import dwt.internal.cocoa.NSString;
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24 import dwt.internal.cocoa.NSView;
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25 import dwt.internal.cocoa.OS;
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26 import dwt.internal.cocoa.SWTBox;
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27 import dwt.internal.cocoa.SWTView;
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28
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29 /**
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30 * Instances of this class provide an etched border
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31 * with an optional title.
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32 * <p>
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33 * Shadow styles are hints and may not be honoured
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34 * by the platform. To create a group with the
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35 * default shadow style for the platform, do not
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36 * specify a shadow style.
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37 * <dl>
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38 * <dt><b>Styles:</b></dt>
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39 * <dd>SHADOW_ETCHED_IN, SHADOW_ETCHED_OUT, SHADOW_IN, SHADOW_OUT, SHADOW_NONE</dd>
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40 * <dt><b>Events:</b></dt>
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41 * <dd>(none)</dd>
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42 * </dl>
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43 * <p>
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44 * Note: Only one of the above styles may be specified.
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45 * </p><p>
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46 * IMPORTANT: This class is <em>not</em> intended to be subclassed.
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47 * </p>
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48 *
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49 * @see <a href="http://www.eclipse.org/swt/examples.php">DWT Example: ControlExample</a>
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50 * @see <a href="http://www.eclipse.org/swt/">Sample code and further information</a>
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51 */
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52 public class Group : Composite {
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53 NSView contentView;
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54 String text = "";
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55
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56 /**
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57 * Constructs a new instance of this class given its parent
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58 * and a style value describing its behavior and appearance.
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59 * <p>
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60 * The style value is either one of the style constants defined in
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61 * class <code>DWT</code> which is applicable to instances of this
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62 * class, or must be built by <em>bitwise OR</em>'ing together
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63 * (that is, using the <code>int</code> "|" operator) two or more
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64 * of those <code>DWT</code> style constants. The class description
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65 * lists the style constants that are applicable to the class.
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66 * Style bits are also inherited from superclasses.
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67 * </p>
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68 *
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69 * @param parent a composite control which will be the parent of the new instance (cannot be null)
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70 * @param style the style of control to construct
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71 *
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72 * @exception IllegalArgumentException <ul>
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73 * <li>ERROR_NULL_ARGUMENT - if the parent is null</li>
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74 * </ul>
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75 * @exception DWTException <ul>
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76 * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the parent</li>
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77 * <li>ERROR_INVALID_SUBCLASS - if this class is not an allowed subclass</li>
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78 * </ul>
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79 *
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80 * @see DWT#SHADOW_ETCHED_IN
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81 * @see DWT#SHADOW_ETCHED_OUT
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82 * @see DWT#SHADOW_IN
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83 * @see DWT#SHADOW_OUT
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84 * @see DWT#SHADOW_NONE
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85 * @see Widget#checkSubclass
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86 * @see Widget#getStyle
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87 */
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88 public this (Composite parent, int style) {
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89 super (parent, checkStyle (style));
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90 }
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91
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92 static int checkStyle (int style) {
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93 style |= DWT.NO_FOCUS;
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94 /*
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95 * Even though it is legal to create this widget
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96 * with scroll bars, they serve no useful purpose
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97 * because they do not automatically scroll the
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98 * widget's client area. The fix is to clear
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99 * the DWT style.
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100 */
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101 return style & ~(DWT.H_SCROLL | DWT.V_SCROLL);
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102 }
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103
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104 protected void checkSubclass () {
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105 if (!isValidSubclass ()) error (DWT.ERROR_INVALID_SUBCLASS);
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106 }
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107
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108 public Rectangle computeTrim (int x, int y, int width, int height) {
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109 checkWidget ();
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110 NSBox widget = cast(NSBox)view;
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111 int border = (int)Math.ceil (widget.borderWidth ());
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112 NSSize margins = widget.contentViewMargins();
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113 NSRect frame = contentView.frame();
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114 width += (margins.width + border) * 2;
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115 height += (margins.height + border) * 2 + frame.y;
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116 return super.computeTrim(x, y, width, height);
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117 }
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118
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119 NSView contentView () {
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120 return contentView;
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121 }
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122
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123 void deregister () {
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124 super.deregister ();
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125 display.removeWidget (contentView);
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126 SWTBox box = (SWTBox)view;
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127 display.removeWidget (box.titleCell());
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128 }
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129
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130 void createHandle () {
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131 NSBox widget = cast(NSBox)(new SWTBox()).alloc();
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132 widget.initWithFrame(NSRect());
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133 widget.setTitlePosition(OS.NSNoTitle);
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134 NSView contentWidget = (NSView)new SWTView().alloc();
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135 contentWidget.initWithFrame(NSRect());
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136 // contentWidget.setDrawsBackground(false);
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137 widget.setContentView(contentWidget);
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138 contentView = contentWidget;
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139 view = widget;
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140 }
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141
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142 public Rectangle getClientArea () {
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143 checkWidget();
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144 NSRect rect = contentView.bounds();
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145 return new Rectangle(cast(int)rect.x, cast(int)rect.y, cast(int)rect.width, cast(int)rect.height);
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146 }
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147
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148 String getNameText () {
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149 return getText ();
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150 }
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151
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152 /**
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153 * Returns the receiver's text, which is the string that the
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154 * is used as the <em>title</em>. If the text has not previously
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155 * been set, returns an empty string.
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156 *
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157 * @return the text
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158 *
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159 * @exception DWTException <ul>
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160 * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
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161 * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
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162 * </ul>
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163 */
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164 public String getText () {
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165 checkWidget ();
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166 return text;
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167 }
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168
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169 float getThemeAlpha () {
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170 return 0.25f * parent.getThemeAlpha ();
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171 }
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172
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173 void register () {
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174 super.register ();
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175 display.addWidget (contentView, this);
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176 SWTBox box = (SWTBox)view;
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177 display.addWidget (box.titleCell(), this);
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178 }
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179
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180 void releaseHandle () {
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181 super.releaseHandle ();
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182 if (contentView !is null) contentView.release();
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183 contentView = null;
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184 }
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185
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186 void setFont(NSFont font) {
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187 ((NSBox) view).setTitleFont(font);
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188 }
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189
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190 /**
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191 * Sets the receiver's text, which is the string that will
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192 * be displayed as the receiver's <em>title</em>, to the argument,
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193 * which may not be null. The string may include the mnemonic character.
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194 * </p>
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195 * Mnemonics are indicated by an '&amp;' that causes the next
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196 * character to be the mnemonic. When the user presses a
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197 * key sequence that matches the mnemonic, focus is assigned
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198 * to the first child of the group. On most platforms, the
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199 * mnemonic appears underlined but may be emphasised in a
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200 * platform specific manner. The mnemonic indicator character
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201 * '&amp;' can be escaped by doubling it in the string, causing
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202 * a single '&amp;' to be displayed.
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203 * </p>
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204 * @param string the new text
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205 *
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206 * @exception IllegalArgumentException <ul>
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207 * <li>ERROR_NULL_ARGUMENT - if the text is null</li>
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208 * </ul>
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209 * @exception DWTException <ul>
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210 * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
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211 * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
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212 * </ul>
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213 */
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214 public void setText (String string) {
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215 checkWidget();
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216 if (string is null) error (DWT.ERROR_NULL_ARGUMENT);
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217 text = string;
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218 char [] buffer = new char [text.length ()];
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219 text.getChars (0, buffer.length, buffer, 0);
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220 int length = fixMnemonic (buffer);
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221 NSBox box = cast(NSBox)view;
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222 box.setTitlePosition(length is 0 ? OS.NSNoTitle : OS.NSAtTop);
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223 box.setTitle(NSString.stringWithCharacters(buffer, length));
0
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224 }
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225
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226 }