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annotate dwt/widgets/Dialog.d @ 246:fd9c62a2998e

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Updater SWT 3.4M7 to 3.4
author Frank Benoit <benoit@tionex.de>
date Tue, 01 Jul 2008 10:15:59 +0200
parents 43b41c7fe84a
children
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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 * Port to the D programming language:
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11 * Frank Benoit <benoit@tionex.de>
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12 *******************************************************************************/
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13 module dwt.widgets.Dialog;
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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.widgets.Shell;
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19 import dwt.widgets.Display;
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20 import dwt.widgets.Widget;
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21 import dwt.dwthelper.utils;
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22
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23 /**
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24 * This class is the abstract superclass of the classes
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25 * that represent the built in platform dialogs.
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26 * A <code>Dialog</code> typically contains other widgets
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27 * that are not accessible. A <code>Dialog</code> is not
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28 * a <code>Widget</code>.
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29 * <p>
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30 * This class can also be used as the abstract superclass
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31 * for user-designed dialogs. Such dialogs usually consist
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32 * of a Shell with child widgets. The basic template for a
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33 * user-defined dialog typically looks something like this:
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34 * <pre><code>
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35 * public class MyDialog extends Dialog {
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36 * Object result;
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37 *
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38 * public MyDialog (Shell parent, int style) {
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39 * super (parent, style);
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40 * }
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41 * public MyDialog (Shell parent) {
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42 * this (parent, 0); // your default style bits go here (not the Shell's style bits)
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43 * }
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44 * public Object open () {
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45 * Shell parent = getParent();
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46 * Shell shell = new Shell(parent, DWT.DIALOG_TRIM | DWT.APPLICATION_MODAL);
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47 * shell.setText(getText());
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48 * // Your code goes here (widget creation, set result, etc).
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49 * shell.open();
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50 * Display display = parent.getDisplay();
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51 * while (!shell.isDisposed()) {
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52 * if (!display.readAndDispatch()) display.sleep();
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53 * }
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54 * return result;
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55 * }
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56 * }
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57 * </pre></code>
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58 * <p>
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59 * Note: The <em>modality</em> styles supported by this class
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60 * are treated as <em>HINT</em>s, because not all are supported
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61 * by every subclass on every platform. If a modality style is
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62 * not supported, it is "upgraded" to a more restrictive modality
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63 * style that is supported. For example, if <code>PRIMARY_MODAL</code>
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64 * is not supported by a particular dialog, it would be upgraded to
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65 * <code>APPLICATION_MODAL</code>. In addition, as is the case
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66 * for shells, the window manager for the desktop on which the
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67 * instance is visible has ultimate control over the appearance
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68 * and behavior of the instance, including its modality.
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69 * <dl>
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70 * <dt><b>Styles:</b></dt>
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71 * <dd>APPLICATION_MODAL, PRIMARY_MODAL, SYSTEM_MODAL</dd>
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72 * <dt><b>Events:</b></dt>
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73 * <dd>(none)</dd>
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74 * </dl>
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75 * <p>
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76 * Note: Only one of the styles APPLICATION_MODAL, PRIMARY_MODAL,
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77 * and SYSTEM_MODAL may be specified.
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78 * </p>
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79 *
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80 * @see Shell
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81 * @see <a href="http://www.eclipse.org/swt/examples.php">DWT Example: ControlExample</a>
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82 * @see <a href="http://www.eclipse.org/swt/">Sample code and further information</a>
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83 */
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84
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85 public abstract class Dialog {
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86 int style;
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87 Shell parent;
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88 String title;
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89
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90 /**
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91 * Constructs a new instance of this class given only its
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92 * parent.
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93 *
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94 * @param parent a shell which will be the parent of the new instance
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95 *
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96 * @exception IllegalArgumentException <ul>
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97 * <li>ERROR_NULL_ARGUMENT - if the parent is null</li>
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98 * </ul>
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99 * @exception DWTException <ul>
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100 * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the parent</li>
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101 * </ul>
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102 */
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103 public this (Shell parent) {
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104 this (parent, DWT.PRIMARY_MODAL);
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105 }
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106
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107 /**
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108 * Constructs a new instance of this class given its parent
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109 * and a style value describing its behavior and appearance.
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110 * <p>
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111 * The style value is either one of the style constants defined in
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112 * class <code>DWT</code> which is applicable to instances of this
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113 * class, or must be built by <em>bitwise OR</em>'ing together
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114 * (that is, using the <code>int</code> "|" operator) two or more
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115 * of those <code>DWT</code> style constants. The class description
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116 * lists the style constants that are applicable to the class.
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117 * Style bits are also inherited from superclasses.
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118 *
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119 * @param parent a shell which will be the parent of the new instance
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120 * @param style the style of dialog to construct
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121 *
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122 * @exception IllegalArgumentException <ul>
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123 * <li>ERROR_NULL_ARGUMENT - if the parent is null</li>
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124 * </ul>
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125 * @exception DWTException <ul>
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126 * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the parent</li>
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127 * </ul>
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128 *
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129 * @see DWT#PRIMARY_MODAL
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130 * @see DWT#APPLICATION_MODAL
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131 * @see DWT#SYSTEM_MODAL
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132 */
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133 public this (Shell parent, int style) {
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134 checkParent (parent);
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135 this.parent = parent;
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136 this.style = style;
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137 title = "";
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138 }
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139
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140 /**
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141 * Checks that this class can be subclassed.
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142 * <p>
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143 * IMPORTANT: See the comment in <code>Widget.checkSubclass()</code>.
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144 * </p>
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145 *
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146 * @exception DWTException <ul>
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147 * <li>ERROR_INVALID_SUBCLASS - if this class is not an allowed subclass</li>
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148 * </ul>
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149 *
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150 * @see Widget#checkSubclass
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151 */
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152 protected void checkSubclass () {
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153 //PORTING_TODO: implement Display.isValidClass and Class?
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154 /+if (!Display.isValidClass (getClass ())) {
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155 error (DWT.ERROR_INVALID_SUBCLASS);
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156 }+/
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157 }
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158
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159 /**
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160 * Throws an exception if the specified widget can not be
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161 * used as a parent for the receiver.
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162 *
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163 * @exception IllegalArgumentException <ul>
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164 * <li>ERROR_NULL_ARGUMENT - if the parent is null</li>
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165 * <li>ERROR_INVALID_ARGUMENT - if the parent is disposed</li>
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166 * </ul>
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167 * @exception DWTException <ul>
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168 * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the parent</li>
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169 * </ul>
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170 */
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171 void checkParent (Shell parent) {
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172 if (parent is null) error (DWT.ERROR_NULL_ARGUMENT);
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173 parent.checkWidget ();
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174 }
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175
213
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176 static int checkStyle (Shell parent, int style) {
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177 if ((style & (DWT.PRIMARY_MODAL | DWT.APPLICATION_MODAL | DWT.SYSTEM_MODAL)) is 0) {
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178 style |= DWT.APPLICATION_MODAL;
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179 }
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180 style &= ~DWT.MIRRORED;
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181 if ((style & (DWT.LEFT_TO_RIGHT | DWT.RIGHT_TO_LEFT)) is 0) {
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182 if (parent !is null) {
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183 if ((parent.style & DWT.LEFT_TO_RIGHT) !is 0) style |= DWT.LEFT_TO_RIGHT;
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184 if ((parent.style & DWT.RIGHT_TO_LEFT) !is 0) style |= DWT.RIGHT_TO_LEFT;
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185 }
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186 }
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187 return Widget.checkBits (style, DWT.LEFT_TO_RIGHT, DWT.RIGHT_TO_LEFT, 0, 0, 0, 0);
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188 }
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189
31
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190 /**
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191 * Does whatever dialog specific cleanup is required, and then
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192 * uses the code in <code>DWTError.error</code> to handle the error.
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193 *
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194 * @param code the descriptive error code
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195 *
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196 * @see DWT#error(int)
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197 */
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198 void error (int code) {
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199 DWT.error(code);
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200 }
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201
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202 /**
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203 * Returns the receiver's parent, which must be a <code>Shell</code>
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204 * or null.
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205 *
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206 * @return the receiver's parent
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207 *
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208 * @exception DWTException <ul>
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209 * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
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210 * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
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211 * </ul>
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212 */
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213 public Shell getParent () {
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214 return parent;
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215 }
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216
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217 /**
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218 * Returns the receiver's style information.
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219 * <p>
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220 * Note that, the value which is returned by this method <em>may
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221 * not match</em> the value which was provided to the constructor
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222 * when the receiver was created.
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223 * </p>
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224 *
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225 * @return the style bits
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226 *
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227 * @exception DWTException <ul>
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228 * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
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229 * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
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230 * </ul>
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231 */
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232 public int getStyle () {
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233 return style;
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234 }
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235
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236 /**
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237 * Returns the receiver's text, which is the string that the
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238 * window manager will typically display as the receiver's
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239 * <em>title</em>. If the text has not previously been set,
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240 * returns an empty string.
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241 *
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242 * @return the text
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243 *
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244 * @exception DWTException <ul>
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245 * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
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246 * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
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247 * </ul>
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248 */
212
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249 public String getText () {
31
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250 return title;
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251 }
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252
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253 /**
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254 * Sets the receiver's text, which is the string that the
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255 * window manager will typically display as the receiver's
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256 * <em>title</em>, to the argument, which must not be null.
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257 *
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258 * @param string the new text
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259 *
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260 * @exception DWTException <ul>
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261 * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
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262 * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
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263 * </ul>
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264 */
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265 public void setText (String string) {
239
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266 // DWT extension: allow null string
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267 //if (string is null) error (DWT.ERROR_NULL_ARGUMENT);
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268 title = string;
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269 }
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270
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271 }