Mercurial > projects > dwt-mac
annotate dwt/widgets/Label.d @ 7:e831403a80a9
Add 'cast' to casts
author | Frank Benoit <benoit@tionex.de> |
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date | Wed, 27 Aug 2008 14:30:35 +0200 |
parents | 1a8b3cb347e0 |
children | d8635bb48c7c |
rev | line source |
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0
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1 /******************************************************************************* |
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2 * Copyright (c) 2000, 2006 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.Label; |
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12 |
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13 import dwt.dwthelper.utils; |
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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.DWTException; |
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18 import dwt.graphics.Image; |
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19 import dwt.graphics.Point; |
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20 import dwt.graphics.Rectangle; |
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21 import dwt.internal.cocoa.NSAttributedString; |
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22 import dwt.internal.cocoa.NSBox; |
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23 import dwt.internal.cocoa.NSCell; |
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24 import dwt.internal.cocoa.NSColor; |
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25 import dwt.internal.cocoa.NSImageView; |
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26 import dwt.internal.cocoa.NSMutableDictionary; |
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27 import dwt.internal.cocoa.NSRect; |
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28 import dwt.internal.cocoa.NSString; |
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29 import dwt.internal.cocoa.NSTextField; |
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30 import dwt.internal.cocoa.NSTextFieldCell; |
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31 import dwt.internal.cocoa.OS; |
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32 import dwt.internal.cocoa.SWTBox; |
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33 import dwt.internal.cocoa.SWTImageView; |
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34 import dwt.internal.cocoa.SWTTextField; |
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35 |
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36 /** |
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37 * Instances of this class represent a non-selectable |
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38 * user interface object that displays a string or image. |
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39 * When SEPARATOR is specified, displays a single |
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40 * vertical or horizontal line. |
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41 * <dl> |
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42 * <dt><b>Styles:</b></dt> |
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43 * <dd>SEPARATOR, HORIZONTAL, VERTICAL</dd> |
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44 * <dd>SHADOW_IN, SHADOW_OUT, SHADOW_NONE</dd> |
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45 * <dd>CENTER, LEFT, RIGHT, WRAP</dd> |
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46 * <dt><b>Events:</b></dt> |
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47 * <dd>(none)</dd> |
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48 * </dl> |
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49 * <p> |
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50 * Note: Only one of SHADOW_IN, SHADOW_OUT and SHADOW_NONE may be specified. |
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51 * SHADOW_NONE is a HINT. Only one of HORIZONTAL and VERTICAL may be specified. |
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52 * Only one of CENTER, LEFT and RIGHT may be specified. |
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53 * </p><p> |
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54 * IMPORTANT: This class is intended to be subclassed <em>only</em> |
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55 * within the DWT implementation. |
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56 * </p> |
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57 */ |
3 | 58 public class Label : Control { |
0
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59 String text = ""; |
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60 Image image; |
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61 bool isImage; |
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62 NSTextField textView; |
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63 NSImageView imageView; |
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64 |
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65 /** |
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66 * Constructs a new instance of this class given its parent |
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67 * and a style value describing its behavior and appearance. |
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68 * <p> |
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69 * The style value is either one of the style constants defined in |
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70 * class <code>DWT</code> which is applicable to instances of this |
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71 * class, or must be built by <em>bitwise OR</em>'ing together |
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72 * (that is, using the <code>int</code> "|" operator) two or more |
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73 * of those <code>DWT</code> style constants. The class description |
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74 * lists the style constants that are applicable to the class. |
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75 * Style bits are also inherited from superclasses. |
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76 * </p> |
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77 * |
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78 * @param parent a composite control which will be the parent of the new instance (cannot be null) |
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79 * @param style the style of control to construct |
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80 * |
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81 * @exception IllegalArgumentException <ul> |
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82 * <li>ERROR_NULL_ARGUMENT - if the parent is null</li> |
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83 * </ul> |
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84 * @exception DWTException <ul> |
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85 * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the parent</li> |
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86 * <li>ERROR_INVALID_SUBCLASS - if this class is not an allowed subclass</li> |
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87 * </ul> |
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88 * |
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89 * @see DWT#SEPARATOR |
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90 * @see DWT#HORIZONTAL |
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91 * @see DWT#VERTICAL |
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92 * @see DWT#SHADOW_IN |
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93 * @see DWT#SHADOW_OUT |
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94 * @see DWT#SHADOW_NONE |
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95 * @see DWT#CENTER |
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96 * @see DWT#LEFT |
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97 * @see DWT#RIGHT |
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98 * @see DWT#WRAP |
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99 * @see Widget#checkSubclass |
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100 * @see Widget#getStyle |
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101 */ |
5 | 102 public this (Composite parent, int style) { |
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103 super (parent, checkStyle (style)); |
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104 } |
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105 |
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106 static int checkStyle (int style) { |
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107 style |= DWT.NO_FOCUS; |
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108 if ((style & DWT.SEPARATOR) !is 0) { |
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109 style = checkBits (style, DWT.VERTICAL, DWT.HORIZONTAL, 0, 0, 0, 0); |
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110 return checkBits (style, DWT.SHADOW_OUT, DWT.SHADOW_IN, DWT.SHADOW_NONE, 0, 0, 0); |
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111 } |
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112 return checkBits (style, DWT.LEFT, DWT.CENTER, DWT.RIGHT, 0, 0, 0); |
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113 } |
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114 |
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115 public Point computeSize (int wHint, int hHint, bool changed) { |
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116 checkWidget(); |
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117 int width = 0, height = 0; |
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118 if ((style & DWT.SEPARATOR) !is 0) { |
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119 if ((style & DWT.HORIZONTAL) !is 0) { |
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120 width = DEFAULT_WIDTH; |
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121 height = 3; |
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122 } else { |
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123 width = 3; |
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124 height = DEFAULT_HEIGHT; |
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125 } |
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126 } else { |
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127 if (image !is null && isImage) { |
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128 Rectangle bounds = image.getBounds(); |
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129 width = bounds.width; |
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130 height = bounds.height; |
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131 } else { |
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132 NSRect oldRect = textView.frame(); |
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133 textView.sizeToFit(); |
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134 NSRect newRect = textView.frame(); |
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135 textView.setFrame (oldRect); |
7 | 136 width = cast(int)newRect.width; |
137 height = cast(int)newRect.height; | |
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138 } |
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139 } |
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140 if (wHint !is DWT.DEFAULT) width = wHint; |
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141 if (hHint !is DWT.DEFAULT) height = hHint; |
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142 return new Point (width, height); |
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143 } |
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144 |
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145 void createHandle () { |
7 | 146 SWTBox widget = cast(SWTBox)new SWTBox().alloc(); |
0
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147 widget.initWithFrame(new NSRect()); |
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148 widget.setTag(jniRef); |
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149 widget.setTitle(NSString.stringWith("")); |
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150 if ((style & DWT.SEPARATOR) !is 0) { |
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151 widget.setBoxType(OS.NSBoxSeparator); |
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152 } else { |
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153 widget.setBorderType(OS.NSNoBorder); |
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154 |
7 | 155 NSImageView imageWidget = cast(NSImageView)new SWTImageView().alloc(); |
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156 imageWidget.initWithFrame(new NSRect()); |
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157 imageWidget.setTag(jniRef); |
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158 |
7 | 159 SWTTextField textWidget = cast(SWTTextField)new SWTTextField().alloc(); |
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160 textWidget.initWithFrame(new NSRect()); |
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161 textWidget.setBordered(false); |
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162 textWidget.setEditable(false); |
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163 textWidget.setDrawsBackground(false); |
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164 textWidget.setTag(jniRef); |
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165 if ((style & DWT.WRAP) !is 0) { |
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166 NSTextFieldCell cell = new NSTextFieldCell(textWidget.cell()); |
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167 cell.setWraps(true); |
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168 } |
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169 |
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170 widget.addSubview_(imageWidget); |
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171 widget.addSubview_(textWidget); |
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172 widget.setContentView(textWidget); |
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173 |
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174 imageView = imageWidget; |
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175 textView = textWidget; |
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176 _setAlignment(); |
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177 } |
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178 view = widget; |
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179 parent.contentView().addSubview_(widget); |
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180 } |
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181 |
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182 NSAttributedString createString() { |
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183 NSMutableDictionary dict = NSMutableDictionary.dictionaryWithCapacity(4); |
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184 if (foreground !is null) { |
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185 NSColor color = NSColor.colorWithDeviceRed(foreground.handle[0], foreground.handle[1], foreground.handle[2], 1); |
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186 dict.setObject(color, OS.NSForegroundColorAttributeName()); |
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187 } |
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188 if (font !is null) { |
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189 dict.setObject(font.handle, OS.NSFontAttributeName()); |
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190 } |
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191 char [] chars = new char [text.length ()]; |
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192 text.getChars (0, chars.length, chars, 0); |
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193 int length = fixMnemonic (chars); |
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194 |
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195 NSString str = NSString.stringWithCharacters(chars, length); |
7 | 196 NSAttributedString attribStr = (cast(NSAttributedString)new NSAttributedString().alloc()).initWithString_attributes_(str, dict); |
0
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197 attribStr.autorelease(); |
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198 return attribStr; |
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199 } |
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200 |
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201 /** |
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202 * Returns a value which describes the position of the |
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203 * text or image in the receiver. The value will be one of |
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204 * <code>LEFT</code>, <code>RIGHT</code> or <code>CENTER</code> |
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205 * unless the receiver is a <code>SEPARATOR</code> label, in |
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206 * which case, <code>NONE</code> is returned. |
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207 * |
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208 * @return the alignment |
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209 * |
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210 * @exception DWTException <ul> |
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211 * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> |
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212 * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> |
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213 * </ul> |
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214 */ |
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215 public int getAlignment () { |
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216 checkWidget(); |
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217 if ((style & DWT.SEPARATOR) !is 0) return DWT.LEFT; |
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218 if ((style & DWT.CENTER) !is 0) return DWT.CENTER; |
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219 if ((style & DWT.RIGHT) !is 0) return DWT.RIGHT; |
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220 return DWT.LEFT; |
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221 } |
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222 |
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223 /** |
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224 * Returns the receiver's image if it has one, or null |
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225 * if it does not. |
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226 * |
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227 * @return the receiver's image |
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228 * |
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229 * @exception DWTException <ul> |
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230 * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> |
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231 * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> |
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232 * </ul> |
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233 */ |
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234 public Image getImage () { |
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235 checkWidget(); |
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236 return image; |
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237 } |
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238 |
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239 String getNameText () { |
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240 return getText (); |
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241 } |
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242 |
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243 /** |
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244 * Returns the receiver's text, which will be an empty |
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245 * string if it has never been set or if the receiver is |
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246 * a <code>SEPARATOR</code> label. |
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247 * |
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248 * @return the receiver's text |
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249 * |
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250 * @exception DWTException <ul> |
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251 * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> |
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252 * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> |
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253 * </ul> |
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254 */ |
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255 public String getText () { |
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256 checkWidget(); |
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257 if ((style & DWT.SEPARATOR) !is 0) return ""; |
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258 return text; |
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259 } |
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260 |
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261 /** |
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262 * Controls how text and images will be displayed in the receiver. |
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263 * The argument should be one of <code>LEFT</code>, <code>RIGHT</code> |
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264 * or <code>CENTER</code>. If the receiver is a <code>SEPARATOR</code> |
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265 * label, the argument is ignored and the alignment is not changed. |
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266 * |
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267 * @param alignment the new alignment |
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268 * |
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269 * @exception DWTException <ul> |
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270 * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> |
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271 * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> |
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272 * </ul> |
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273 */ |
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274 public void setAlignment (int alignment) { |
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275 checkWidget(); |
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276 if ((style & DWT.SEPARATOR) !is 0) return; |
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277 if ((alignment & (DWT.LEFT | DWT.RIGHT | DWT.CENTER)) is 0) return; |
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278 style &= ~(DWT.LEFT | DWT.RIGHT | DWT.CENTER); |
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279 style |= alignment & (DWT.LEFT | DWT.RIGHT | DWT.CENTER); |
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280 _setAlignment(); |
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281 } |
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282 |
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283 void setBackground (float [] color) { |
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284 if ((style & DWT.SEPARATOR) !is 0) return; |
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285 textView.setDrawsBackground(color !is null); |
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286 if (color is null) return; |
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287 NSColor nsColor = NSColor.colorWithDeviceRed(color[0], color[1], color[2], 1); |
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288 NSTextFieldCell cell = new NSTextFieldCell(textView.cell()); |
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289 cell.setBackgroundColor(nsColor); |
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290 } |
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291 |
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292 void _setAlignment() { |
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293 if ((style & DWT.RIGHT) !is 0) { |
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294 textView.setAlignment(OS.NSRightTextAlignment); |
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295 imageView.setImageAlignment(OS.NSImageAlignRight); |
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296 } |
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297 if ((style & DWT.LEFT) !is 0) { |
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298 textView.setAlignment(OS.NSLeftTextAlignment); |
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299 imageView.setImageAlignment(OS.NSImageAlignLeft); |
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300 } |
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301 if ((style & DWT.CENTER) !is 0) { |
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302 textView.setAlignment(OS.NSCenterTextAlignment); |
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303 imageView.setImageAlignment(OS.NSImageAlignCenter); |
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304 } |
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305 } |
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306 |
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307 int setBounds (int x, int y, int width, int height, bool move, bool resize) { |
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308 int result = super.setBounds(x, y, width, height, move, resize); |
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309 if ((result & RESIZED) !is 0) { |
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310 if (imageView !is null || textView !is null) { |
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311 NSRect rect = view.bounds(); |
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312 imageView.setFrame(rect); |
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313 textView.setFrame(rect); |
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314 } |
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315 } |
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316 return result; |
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317 } |
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318 |
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319 void setForeground (float [] color) { |
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320 if ((style & DWT.SEPARATOR) !is 0) return; |
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321 NSCell cell = new NSCell(textView.cell()); |
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322 cell.setAttributedStringValue(createString()); |
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323 } |
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324 |
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325 bool setTabItemFocus () { |
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326 return false; |
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327 } |
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328 |
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329 /** |
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330 * Sets the receiver's image to the argument, which may be |
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331 * null indicating that no image should be displayed. |
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332 * |
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333 * @param image the image to display on the receiver (may be null) |
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334 * |
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335 * @exception IllegalArgumentException <ul> |
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336 * <li>ERROR_INVALID_ARGUMENT - if the image has been disposed</li> |
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337 * </ul> |
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338 * @exception DWTException <ul> |
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339 * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> |
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340 * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> |
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341 * </ul> |
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342 */ |
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343 public void setImage (Image image) { |
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344 checkWidget(); |
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345 if ((style & DWT.SEPARATOR) !is 0) return; |
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346 if (image !is null && image.isDisposed ()) { |
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347 error (DWT.ERROR_INVALID_ARGUMENT); |
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348 } |
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349 this.image = image; |
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350 isImage = true; |
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351 imageView.setImage(image !is null ? image.handle : null); |
7 | 352 (cast(NSBox)view).setContentView(imageView); |
0
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353 } |
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354 |
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355 /** |
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356 * Sets the receiver's text. |
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357 * <p> |
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358 * This method sets the widget label. The label may include |
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359 * the mnemonic character and line delimiters. |
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360 * </p> |
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361 * <p> |
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362 * Mnemonics are indicated by an '&' that causes the next |
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363 * character to be the mnemonic. When the user presses a |
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364 * key sequence that matches the mnemonic, focus is assigned |
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365 * to the control that follows the label. On most platforms, |
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366 * the mnemonic appears underlined but may be emphasised in a |
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367 * platform specific manner. The mnemonic indicator character |
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368 * '&' can be escaped by doubling it in the string, causing |
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369 * a single '&' to be displayed. |
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370 * </p> |
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371 * |
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372 * @param string the new text |
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373 * |
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374 * @exception IllegalArgumentException <ul> |
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375 * <li>ERROR_NULL_ARGUMENT - if the text is null</li> |
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376 * </ul> |
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377 * @exception DWTException <ul> |
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378 * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> |
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379 * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> |
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380 * </ul> |
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381 */ |
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382 public void setText (String string) { |
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383 checkWidget(); |
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384 if (string is null) error (DWT.ERROR_NULL_ARGUMENT); |
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385 if ((style & DWT.SEPARATOR) !is 0) return; |
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386 isImage = false; |
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387 text = string; |
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388 NSCell cell = new NSCell(textView.cell()); |
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389 cell.setAttributedStringValue(createString()); |
7 | 390 (cast(NSBox)view).setContentView(textView); |
0
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391 } |
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392 |
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393 } |