Mercurial > projects > dwt-mac
annotate dwt/widgets/Label.d @ 70:2d5ef909b21d
Ported dwt.widgets.Lable
author | Jacob Carlborg <doob@me.com> |
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date | Tue, 23 Dec 2008 23:30:38 +0100 |
parents | cfa563df4fdd |
children | c7f7f4d7091a |
rev | line source |
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45 | 1 /******************************************************************************* |
2 * Copyright (c) 2000, 2008 IBM Corporation and others. | |
0
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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 |
70 | 10 * |
11 * Port to the D programming language: | |
12 * Jacob Carlborg <doob@me.com> | |
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13 *******************************************************************************/ |
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14 module dwt.widgets.Label; |
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15 |
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16 import dwt.dwthelper.utils; |
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17 |
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18 |
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19 import dwt.DWT; |
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20 import dwt.DWTException; |
45 | 21 import dwt.accessibility.ACC; |
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22 import dwt.graphics.Image; |
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23 import dwt.graphics.Point; |
45 | 24 import dwt.internal.cocoa.NSArray; |
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25 import dwt.internal.cocoa.NSAttributedString; |
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26 import dwt.internal.cocoa.NSBox; |
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27 import dwt.internal.cocoa.NSCell; |
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28 import dwt.internal.cocoa.NSColor; |
45 | 29 import dwt.internal.cocoa.NSFont; |
30 import dwt.internal.cocoa.NSImage; | |
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31 import dwt.internal.cocoa.NSImageView; |
45 | 32 import dwt.internal.cocoa.NSMutableArray; |
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33 import dwt.internal.cocoa.NSMutableDictionary; |
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34 import dwt.internal.cocoa.NSRect; |
45 | 35 import dwt.internal.cocoa.NSSize; |
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36 import dwt.internal.cocoa.NSString; |
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37 import dwt.internal.cocoa.NSTextField; |
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38 import dwt.internal.cocoa.NSTextFieldCell; |
45 | 39 import dwt.internal.cocoa.NSView; |
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40 import dwt.internal.cocoa.OS; |
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41 import dwt.internal.cocoa.SWTBox; |
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42 import dwt.internal.cocoa.SWTImageView; |
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43 import dwt.internal.cocoa.SWTTextField; |
70 | 44 import cocoa = dwt.internal.cocoa.id; |
45 | |
46 import dwt.internal.c.Carbon; | |
47 import objc = dwt.internal.objc.runtime; | |
48 import dwt.widgets.Composite; | |
49 import dwt.widgets.Control; | |
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50 |
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51 /** |
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52 * Instances of this class represent a non-selectable |
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53 * user interface object that displays a string or image. |
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54 * When SEPARATOR is specified, displays a single |
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55 * vertical or horizontal line. |
45 | 56 * <p> |
57 * Shadow styles are hints and may not be honoured | |
58 * by the platform. To create a separator label | |
59 * with the default shadow style for the platform, | |
60 * do not specify a shadow style. | |
61 * </p> | |
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62 * <dl> |
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63 * <dt><b>Styles:</b></dt> |
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64 * <dd>SEPARATOR, HORIZONTAL, VERTICAL</dd> |
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65 * <dd>SHADOW_IN, SHADOW_OUT, SHADOW_NONE</dd> |
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66 * <dd>CENTER, LEFT, RIGHT, WRAP</dd> |
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67 * <dt><b>Events:</b></dt> |
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68 * <dd>(none)</dd> |
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69 * </dl> |
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70 * <p> |
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71 * Note: Only one of SHADOW_IN, SHADOW_OUT and SHADOW_NONE may be specified. |
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72 * SHADOW_NONE is a HINT. Only one of HORIZONTAL and VERTICAL may be specified. |
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73 * Only one of CENTER, LEFT and RIGHT may be specified. |
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74 * </p><p> |
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75 * IMPORTANT: This class is intended to be subclassed <em>only</em> |
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76 * within the DWT implementation. |
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77 * </p> |
45 | 78 * |
79 * @see <a href="http://www.eclipse.org/swt/snippets/#label">Label snippets</a> | |
80 * @see <a href="http://www.eclipse.org/swt/examples.php">DWT Example: ControlExample</a> | |
81 * @see <a href="http://www.eclipse.org/swt/">Sample code and further information</a> | |
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82 */ |
3 | 83 public class Label : Control { |
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84 String text = ""; |
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85 Image image; |
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86 bool isImage; |
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87 NSTextField textView; |
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88 NSImageView imageView; |
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89 |
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90 /** |
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91 * Constructs a new instance of this class given its parent |
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92 * and a style value describing its behavior and appearance. |
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93 * <p> |
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94 * The style value is either one of the style constants defined in |
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95 * class <code>DWT</code> which is applicable to instances of this |
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96 * class, or must be built by <em>bitwise OR</em>'ing together |
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97 * (that is, using the <code>int</code> "|" operator) two or more |
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98 * of those <code>DWT</code> style constants. The class description |
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99 * lists the style constants that are applicable to the class. |
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100 * Style bits are also inherited from superclasses. |
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101 * </p> |
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102 * |
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103 * @param parent a composite control which will be the parent of the new instance (cannot be null) |
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104 * @param style the style of control to construct |
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105 * |
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106 * @exception IllegalArgumentException <ul> |
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107 * <li>ERROR_NULL_ARGUMENT - if the parent is null</li> |
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108 * </ul> |
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109 * @exception DWTException <ul> |
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110 * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the parent</li> |
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111 * <li>ERROR_INVALID_SUBCLASS - if this class is not an allowed subclass</li> |
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112 * </ul> |
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113 * |
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114 * @see DWT#SEPARATOR |
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115 * @see DWT#HORIZONTAL |
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116 * @see DWT#VERTICAL |
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117 * @see DWT#SHADOW_IN |
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118 * @see DWT#SHADOW_OUT |
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119 * @see DWT#SHADOW_NONE |
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120 * @see DWT#CENTER |
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121 * @see DWT#LEFT |
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122 * @see DWT#RIGHT |
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123 * @see DWT#WRAP |
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124 * @see Widget#checkSubclass |
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125 * @see Widget#getStyle |
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126 */ |
5 | 127 public this (Composite parent, int style) { |
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128 super (parent, checkStyle (style)); |
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129 } |
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130 |
70 | 131 objc.id accessibilityAttributeNames(objc.id id, objc.SEL sel) { |
45 | 132 |
133 if (accessible !is null) { | |
134 if ((textView !is null && (id is textView.id || id is textView.cell().id)) || (imageView !is null && (id is imageView.id || id is imageView.cell().id))) { | |
135 // See if the accessible will override or augment the standard list. | |
136 // Help, title, and description can be overridden. | |
137 NSMutableArray extraAttributes = NSMutableArray.arrayWithCapacity(3); | |
138 extraAttributes.addObject(OS.NSAccessibilityHelpAttribute); | |
139 extraAttributes.addObject(OS.NSAccessibilityDescriptionAttribute); | |
140 extraAttributes.addObject(OS.NSAccessibilityTitleAttribute); | |
141 | |
142 for (int i = extraAttributes.count() - 1; i >= 0; i--) { | |
143 NSString attribute = new NSString(extraAttributes.objectAtIndex(i).id); | |
144 if (accessible.internal_accessibilityAttributeValue(attribute, ACC.CHILDID_SELF) is null) { | |
145 extraAttributes.removeObjectAtIndex(i); | |
146 } | |
147 } | |
148 | |
149 if (extraAttributes.count() > 0) { | |
70 | 150 objc.id superResult = super.accessibilityAttributeNames(id, sel); |
45 | 151 NSArray baseAttributes = new NSArray(superResult); |
152 NSMutableArray mutableAttributes = NSMutableArray.arrayWithCapacity(baseAttributes.count() + 1); | |
153 mutableAttributes.addObjectsFromArray(baseAttributes); | |
154 | |
155 for (int i = 0; i < extraAttributes.count(); i++) { | |
70 | 156 cocoa.id currAttribute = extraAttributes.objectAtIndex(i); |
45 | 157 if (!mutableAttributes.containsObject(currAttribute)) { |
158 mutableAttributes.addObject(currAttribute); | |
159 } | |
160 } | |
161 | |
162 return mutableAttributes.id; | |
163 } | |
164 } | |
165 } | |
166 | |
167 return super.accessibilityAttributeNames(id, sel); | |
168 } | |
169 | |
70 | 170 bool accessibilityIsIgnored(objc.id id, objc.SEL sel) { |
45 | 171 if (id is view.id) return true; |
172 return super.accessibilityIsIgnored(id, sel); | |
173 } | |
174 | |
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175 static int checkStyle (int style) { |
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176 style |= DWT.NO_FOCUS; |
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177 if ((style & DWT.SEPARATOR) !is 0) { |
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178 style = checkBits (style, DWT.VERTICAL, DWT.HORIZONTAL, 0, 0, 0, 0); |
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179 return checkBits (style, DWT.SHADOW_OUT, DWT.SHADOW_IN, DWT.SHADOW_NONE, 0, 0, 0); |
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180 } |
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181 return checkBits (style, DWT.LEFT, DWT.CENTER, DWT.RIGHT, 0, 0, 0); |
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182 } |
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183 |
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184 public Point computeSize (int wHint, int hHint, bool changed) { |
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185 checkWidget(); |
45 | 186 NSRect oldRect = view.frame (); |
187 int width = DEFAULT_WIDTH; | |
188 int height = DEFAULT_HEIGHT; | |
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189 if ((style & DWT.SEPARATOR) !is 0) { |
70 | 190 (cast(NSBox) view).sizeToFit (); |
45 | 191 NSRect newRect = view.frame (); |
70 | 192 width = cast(int) newRect.width; |
193 height = cast(int) newRect.height; | |
45 | 194 view.setFrame (oldRect); |
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195 } else { |
45 | 196 if (isImage) { |
197 if (image !is null) { | |
198 NSImage nsimage = image.handle; | |
199 NSSize size = nsimage.size (); | |
70 | 200 width = cast(int)size.width; |
201 height = cast(int)size.height; | |
45 | 202 } else { |
203 width = height = 0; | |
204 } | |
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205 } else { |
70 | 206 NSRect rect = NSRect (); |
45 | 207 rect.width = wHint !is DWT.DEFAULT ? wHint : Float.MAX_VALUE; |
208 rect.height = hHint !is DWT.DEFAULT ? hHint : Float.MAX_VALUE; | |
209 NSSize size = textView.cell ().cellSizeForBounds (rect); | |
210 width = cast(int)Math.ceil (size.width); | |
211 height = cast(int)Math.ceil (size.height); | |
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212 } |
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213 } |
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214 if (wHint !is DWT.DEFAULT) width = wHint; |
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215 if (hHint !is DWT.DEFAULT) height = hHint; |
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216 return new Point (width, height); |
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217 } |
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218 |
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219 void createHandle () { |
45 | 220 NSBox widget = cast(NSBox)(new SWTBox()).alloc(); |
46
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221 widget.initWithFrame(NSRect()); |
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222 widget.setTitle(NSString.stringWith("")); |
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223 if ((style & DWT.SEPARATOR) !is 0) { |
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224 widget.setBoxType(OS.NSBoxSeparator); |
70 | 225 NSView child = cast(NSView) (new NSView()).alloc().init().autorelease(); |
45 | 226 widget.setContentView(child); |
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227 } else { |
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228 widget.setBorderType(OS.NSNoBorder); |
45 | 229 widget.setBorderWidth (0); |
230 widget.setBoxType (OS.NSBoxCustom); | |
70 | 231 NSSize offsetSize = NSSize (); |
45 | 232 widget.setContentViewMargins (offsetSize); |
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233 |
70 | 234 NSImageView imageWidget = cast(NSImageView) (new SWTImageView ()).alloc (); |
235 imageWidget.initWithFrame(NSRect ()); | |
45 | 236 imageWidget.setImageScaling (OS.NSScaleNone); |
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237 |
45 | 238 NSTextField textWidget = cast(NSTextField)(new SWTTextField()).alloc(); |
46
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239 textWidget.initWithFrame(NSRect()); |
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240 textWidget.setBordered(false); |
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241 textWidget.setEditable(false); |
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242 textWidget.setDrawsBackground(false); |
45 | 243 NSTextFieldCell cell = new NSTextFieldCell(textWidget.cell()); |
244 cell.setWraps ((style & DWT.WRAP) !is 0); | |
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245 |
45 | 246 widget.addSubview(imageWidget); |
247 widget.addSubview(textWidget); | |
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248 widget.setContentView(textWidget); |
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249 |
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250 imageView = imageWidget; |
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251 textView = textWidget; |
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252 _setAlignment(); |
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253 } |
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254 view = widget; |
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255 } |
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256 |
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257 NSAttributedString createString() { |
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258 NSMutableDictionary dict = NSMutableDictionary.dictionaryWithCapacity(4); |
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259 if (foreground !is null) { |
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260 NSColor color = NSColor.colorWithDeviceRed(foreground.handle[0], foreground.handle[1], foreground.handle[2], 1); |
45 | 261 dict.setObject(color, OS.NSForegroundColorAttributeName); |
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262 } |
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263 if (font !is null) { |
45 | 264 dict.setObject(font.handle, OS.NSFontAttributeName); |
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265 } |
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266 char [] chars = new char [text.length ()]; |
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267 text.getChars (0, chars.length, chars, 0); |
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268 int length = fixMnemonic (chars); |
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269 |
70 | 270 NSString str = NSString.stringWithCharacters(chars.toString16().ptr, length); |
271 NSAttributedString attribStr = (cast(NSAttributedString)(new NSAttributedString()).alloc()).initWithString(str, dict); | |
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272 attribStr.autorelease(); |
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273 return attribStr; |
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274 } |
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275 |
45 | 276 void deregister () { |
277 super.deregister (); | |
278 if (textView !is null) { | |
279 display.removeWidget(textView); | |
280 display.removeWidget(textView.cell()); | |
281 } | |
282 if (imageView !is null) { | |
283 display.removeWidget (imageView); | |
284 display.removeWidget (imageView.cell()); | |
285 } | |
286 } | |
287 | |
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288 /** |
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289 * Returns a value which describes the position of the |
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290 * text or image in the receiver. The value will be one of |
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291 * <code>LEFT</code>, <code>RIGHT</code> or <code>CENTER</code> |
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292 * unless the receiver is a <code>SEPARATOR</code> label, in |
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293 * which case, <code>NONE</code> is returned. |
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294 * |
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295 * @return the alignment |
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296 * |
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297 * @exception DWTException <ul> |
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298 * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> |
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299 * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> |
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300 * </ul> |
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301 */ |
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302 public int getAlignment () { |
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303 checkWidget(); |
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304 if ((style & DWT.SEPARATOR) !is 0) return DWT.LEFT; |
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305 if ((style & DWT.CENTER) !is 0) return DWT.CENTER; |
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306 if ((style & DWT.RIGHT) !is 0) return DWT.RIGHT; |
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307 return DWT.LEFT; |
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308 } |
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309 |
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310 /** |
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311 * Returns the receiver's image if it has one, or null |
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312 * if it does not. |
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313 * |
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314 * @return the receiver's image |
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315 * |
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316 * @exception DWTException <ul> |
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317 * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> |
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318 * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> |
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319 * </ul> |
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320 */ |
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321 public Image getImage () { |
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322 checkWidget(); |
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323 return image; |
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324 } |
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325 |
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326 String getNameText () { |
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327 return getText (); |
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328 } |
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329 |
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330 /** |
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331 * Returns the receiver's text, which will be an empty |
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332 * string if it has never been set or if the receiver is |
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333 * a <code>SEPARATOR</code> label. |
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334 * |
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335 * @return the receiver's text |
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336 * |
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337 * @exception DWTException <ul> |
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338 * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> |
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339 * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> |
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340 * </ul> |
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341 */ |
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342 public String getText () { |
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343 checkWidget(); |
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344 if ((style & DWT.SEPARATOR) !is 0) return ""; |
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345 return text; |
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346 } |
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347 |
45 | 348 void register () { |
349 super.register (); | |
350 if (textView !is null) { | |
351 display.addWidget (textView, this); | |
352 display.addWidget (textView.cell(), this); | |
353 } | |
354 if (imageView !is null) { | |
355 display.addWidget (imageView, this); | |
356 display.addWidget (imageView.cell(), this); | |
357 } | |
358 } | |
359 | |
360 void releaseHandle () { | |
361 super.releaseHandle (); | |
362 if (textView !is null) textView.release(); | |
363 if (imageView !is null) imageView.release(); | |
364 textView = null; | |
365 imageView = null; | |
366 } | |
367 | |
0
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368 /** |
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369 * Controls how text and images will be displayed in the receiver. |
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370 * The argument should be one of <code>LEFT</code>, <code>RIGHT</code> |
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371 * or <code>CENTER</code>. If the receiver is a <code>SEPARATOR</code> |
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372 * label, the argument is ignored and the alignment is not changed. |
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373 * |
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374 * @param alignment the new alignment |
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375 * |
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376 * @exception DWTException <ul> |
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377 * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> |
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378 * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> |
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379 * </ul> |
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380 */ |
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381 public void setAlignment (int alignment) { |
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382 checkWidget(); |
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383 if ((style & DWT.SEPARATOR) !is 0) return; |
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384 if ((alignment & (DWT.LEFT | DWT.RIGHT | DWT.CENTER)) is 0) return; |
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385 style &= ~(DWT.LEFT | DWT.RIGHT | DWT.CENTER); |
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386 style |= alignment & (DWT.LEFT | DWT.RIGHT | DWT.CENTER); |
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387 _setAlignment(); |
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388 } |
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389 |
70 | 390 void setBackground (CGFloat [] color) { |
0
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391 if ((style & DWT.SEPARATOR) !is 0) return; |
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392 textView.setDrawsBackground(color !is null); |
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393 if (color is null) return; |
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394 NSColor nsColor = NSColor.colorWithDeviceRed(color[0], color[1], color[2], 1); |
70 | 395 (cast(NSTextField)textView).setBackgroundColor(nsColor); |
0
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396 } |
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397 |
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398 void _setAlignment() { |
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399 if ((style & DWT.RIGHT) !is 0) { |
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400 textView.setAlignment(OS.NSRightTextAlignment); |
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401 imageView.setImageAlignment(OS.NSImageAlignRight); |
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402 } |
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403 if ((style & DWT.LEFT) !is 0) { |
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404 textView.setAlignment(OS.NSLeftTextAlignment); |
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405 imageView.setImageAlignment(OS.NSImageAlignLeft); |
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406 } |
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407 if ((style & DWT.CENTER) !is 0) { |
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408 textView.setAlignment(OS.NSCenterTextAlignment); |
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409 imageView.setImageAlignment(OS.NSImageAlignCenter); |
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410 } |
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411 } |
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412 |
45 | 413 void setFont(NSFont font) { |
414 if (textView !is null) { | |
415 NSCell cell = new NSCell(textView.cell()); | |
416 cell.setAttributedStringValue(createString()); | |
0
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417 } |
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418 } |
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419 |
70 | 420 void setForeground (CGFloat [] color) { |
0
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421 if ((style & DWT.SEPARATOR) !is 0) return; |
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422 NSCell cell = new NSCell(textView.cell()); |
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423 cell.setAttributedStringValue(createString()); |
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424 } |
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425 |
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426 bool setTabItemFocus () { |
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427 return false; |
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428 } |
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429 |
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430 /** |
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431 * Sets the receiver's image to the argument, which may be |
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432 * null indicating that no image should be displayed. |
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433 * |
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434 * @param image the image to display on the receiver (may be null) |
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435 * |
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436 * @exception IllegalArgumentException <ul> |
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437 * <li>ERROR_INVALID_ARGUMENT - if the image has been disposed</li> |
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438 * </ul> |
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439 * @exception DWTException <ul> |
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440 * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> |
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441 * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> |
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442 * </ul> |
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443 */ |
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444 public void setImage (Image image) { |
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445 checkWidget(); |
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446 if ((style & DWT.SEPARATOR) !is 0) return; |
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447 if (image !is null && image.isDisposed ()) { |
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448 error (DWT.ERROR_INVALID_ARGUMENT); |
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449 } |
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450 this.image = image; |
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451 isImage = true; |
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452 imageView.setImage(image !is null ? image.handle : null); |
7 | 453 (cast(NSBox)view).setContentView(imageView); |
0
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454 } |
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455 |
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456 /** |
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457 * Sets the receiver's text. |
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458 * <p> |
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459 * This method sets the widget label. The label may include |
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460 * the mnemonic character and line delimiters. |
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461 * </p> |
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462 * <p> |
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463 * Mnemonics are indicated by an '&' that causes the next |
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464 * character to be the mnemonic. When the user presses a |
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465 * key sequence that matches the mnemonic, focus is assigned |
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466 * to the control that follows the label. On most platforms, |
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467 * the mnemonic appears underlined but may be emphasised in a |
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468 * platform specific manner. The mnemonic indicator character |
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469 * '&' can be escaped by doubling it in the string, causing |
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470 * a single '&' to be displayed. |
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471 * </p> |
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472 * |
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473 * @param string the new text |
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474 * |
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475 * @exception IllegalArgumentException <ul> |
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476 * <li>ERROR_NULL_ARGUMENT - if the text is null</li> |
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477 * </ul> |
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478 * @exception DWTException <ul> |
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479 * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> |
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480 * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> |
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481 * </ul> |
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482 */ |
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483 public void setText (String string) { |
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484 checkWidget(); |
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485 if (string is null) error (DWT.ERROR_NULL_ARGUMENT); |
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486 if ((style & DWT.SEPARATOR) !is 0) return; |
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487 isImage = false; |
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488 text = string; |
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489 NSCell cell = new NSCell(textView.cell()); |
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490 cell.setAttributedStringValue(createString()); |
7 | 491 (cast(NSBox)view).setContentView(textView); |
0
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492 } |
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493 |
45 | 494 |
0
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495 } |