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annotate org.eclipse.jface/src/org/eclipse/jface/wizard/WizardPage.d @ 12:bc29606a740c

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Added dwt-addons in original directory structure of eclipse.org
author Frank Benoit <benoit@tionex.de>
date Sat, 14 Mar 2009 18:23:29 +0100
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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 * 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 org.eclipse.jface.wizard.WizardPage;
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15 import org.eclipse.jface.wizard.IWizardPage;
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16 import org.eclipse.jface.wizard.IWizard;
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17 import org.eclipse.jface.wizard.IWizardContainer;
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18
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19 import org.eclipse.swt.graphics.Image;
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20 import org.eclipse.swt.widgets.Shell;
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21 import org.eclipse.core.runtime.Assert;
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22 import org.eclipse.jface.dialogs.DialogPage;
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23 import org.eclipse.jface.dialogs.IDialogSettings;
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24 import org.eclipse.jface.resource.ImageDescriptor;
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25
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26 import java.lang.all;
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27 import java.util.Set;
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28
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29 /**
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30 * An abstract base implementation of a wizard page.
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31 * <p>
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32 * Subclasses must implement the <code>createControl</code> method
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33 * to create the specific controls for the wizard page.
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34 * </p>
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35 * <p>
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36 * Subclasses may call the following methods to configure the wizard page:
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37 * <ul>
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38 * <li><code>setDescription</code></li>
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39 * <li><code>setErrorMessage</code></li>
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40 * <li><code>setImageDescriptor</code></li>
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41 * <li><code>setMessage</code></li>
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42 * <li><code>setPageComplete</code></li>
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43 * <li><code>setPreviousPage</code></li>
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44 * <li><code>setTitle</code></li>
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45 * </ul>
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46 * </p>
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47 * <p>
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48 * Subclasses may override these methods if required:
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49 * <ul>
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50 * <li><code>performHelp</code> - may be reimplemented to display help for the page</li>
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51 * <li><code>canFlipToNextPage</code> - may be extended or reimplemented</li>
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52 * <li><code>isPageComplete</code> - may be extended </li>
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53 * <li><code>setDescription</code> - may be extended </li>
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54 * <li><code>setTitle</code> - may be extended </li>
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55 * <li><code>dispose</code> - may be extended to dispose additional allocated SWT resources</li>
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56 * </ul>
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57 * </p>
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58 * <p>
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59 * Note that clients are free to implement <code>IWizardPage</code> from scratch
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60 * instead of subclassing <code>WizardPage</code>. Correct implementations of
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61 * <code>IWizardPage</code> will work with any correct implementation of
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62 * <code>IWizard</code>.
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63 * </p>
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64 */
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65 public abstract class WizardPage : DialogPage, IWizardPage {
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66 alias DialogPage.setMessage setMessage;
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67
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68 /**
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69 * This page's name.
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70 */
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71 private String name;
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72
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73 /**
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74 * The wizard to which this page belongs; <code>null</code>
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75 * if this page has yet to be added to a wizard.
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76 */
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77 private IWizard wizard = null;
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78
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79 /**
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80 * Indicates whether this page is complete.
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81 */
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82 private bool isPageComplete_ = true;
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83
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84 /**
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85 * The page that was shown right before this page became visible;
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86 * <code>null</code> if none.
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87 */
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88 private IWizardPage previousPage = null;
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89
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90 /**
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91 * Creates a new wizard page with the given name, and
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92 * with no title or image.
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93 *
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94 * @param pageName the name of the page
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95 */
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96 protected this(String pageName) {
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97 this(pageName, null, cast(ImageDescriptor) null);
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98 }
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99
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100 /**
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101 * Creates a new wizard page with the given name, title, and image.
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102 *
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103 * @param pageName the name of the page
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104 * @param title the title for this wizard page,
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105 * or <code>null</code> if none
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106 * @param titleImage the image descriptor for the title of this wizard page,
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107 * or <code>null</code> if none
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108 */
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109 protected this(String pageName, String title,
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110 ImageDescriptor titleImage) {
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111 super(title, titleImage);
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112 Assert.isNotNull(pageName); // page name must not be null
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113 name = pageName;
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114 }
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115
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116 /**
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117 * The <code>WizardPage</code> implementation of this <code>IWizardPage</code>
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118 * method returns <code>true</code> if this page is complete (<code>isPageComplete</code>)
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119 * and there is a next page to flip to. Subclasses may override (extend or reimplement).
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120 *
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121 * @see #getNextPage
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122 * @see #isPageComplete()
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123 */
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124 public bool canFlipToNextPage() {
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125 return isPageComplete() && getNextPage() !is null;
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126 }
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127
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128 /**
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129 * Returns the wizard container for this wizard page.
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130 *
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131 * @return the wizard container, or <code>null</code> if this
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132 * wizard page has yet to be added to a wizard, or the
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133 * wizard has yet to be added to a container
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134 */
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135 protected IWizardContainer getContainer() {
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136 if (wizard is null) {
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137 return null;
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138 }
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139 return wizard.getContainer();
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140 }
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141
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142 /**
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143 * Returns the dialog settings for this wizard page.
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144 *
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145 * @return the dialog settings, or <code>null</code> if none
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146 */
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147 protected IDialogSettings getDialogSettings() {
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148 if (wizard is null) {
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149 return null;
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150 }
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151 return wizard.getDialogSettings();
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152 }
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153
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154 /* (non-Javadoc)
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155 * Method declared on IDialogPage.
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156 */
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157 public override Image getImage() {
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158 Image result = super.getImage();
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159
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160 if (result is null && wizard !is null) {
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161 return wizard.getDefaultPageImage();
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162 }
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163
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164 return result;
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165 }
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166
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167 /* (non-Javadoc)
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168 * Method declared on IWizardPage.
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169 */
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170 public String getName() {
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171 return name;
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172 }
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173
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174 /* (non-Javadoc)
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175 * Method declared on IWizardPage.
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176 * The default behavior is to ask the wizard for the next page.
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177 */
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178 public IWizardPage getNextPage() {
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179 if (wizard is null) {
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180 return null;
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181 }
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182 return wizard.getNextPage(this);
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183 }
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184
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185 /* (non-Javadoc)
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186 * Method declared on IWizardPage.
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187 * The default behavior is return the cached previous back or,
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188 * lacking that, to ask the wizard for the previous page.
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189 */
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190 public IWizardPage getPreviousPage() {
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191 if (previousPage !is null) {
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192 return previousPage;
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193 }
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194
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195 if (wizard is null) {
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196 return null;
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197 }
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198
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199 return wizard.getPreviousPage(this);
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200 }
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201
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202 /**
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203 * The <code>WizardPage</code> implementation of this method declared on
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204 * <code>DialogPage</code> returns the shell of the container.
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205 * The advantage of this implementation is that the shell is accessable
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206 * once the container is created even though this page's control may not
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207 * yet be created.
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208 */
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209 public override Shell getShell() {
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210
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211 IWizardContainer container = getContainer();
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212 if (container is null) {
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213 return null;
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214 }
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215
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216 // Ask the wizard since our contents may not have been created.
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217 return container.getShell();
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218 }
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219
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220 /* (non-Javadoc)
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221 * Method declared on IWizardPage.
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222 */
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223 public IWizard getWizard() {
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224 return wizard;
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225 }
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226
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227 /**
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228 * Returns whether this page is the current one in the wizard's container.
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229 *
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230 * @return <code>true</code> if the page is active,
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231 * and <code>false</code> otherwise
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232 */
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233 protected bool isCurrentPage() {
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234 return (getContainer() !is null && this is getContainer()
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235 .getCurrentPage());
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236 }
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237
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238 /**
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239 * The <code>WizardPage</code> implementation of this <code>IWizard</code> method
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240 * returns the value of an internal state variable set by
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241 * <code>setPageComplete</code>. Subclasses may extend.
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242 */
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243 public bool isPageComplete() {
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244 return isPageComplete_;
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245 }
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246
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247 /**
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248 * The <code>WizardPage</code> implementation of this <code>IDialogPage</code>
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249 * method extends the <code>DialogPage</code> implementation to update
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250 * the wizard container title bar. Subclasses may extend.
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251 */
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252 public override void setDescription(String description) {
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253 super.setDescription(description);
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254 if (isCurrentPage()) {
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255 getContainer().updateTitleBar();
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256 }
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257 }
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258
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259 /**
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260 * The <code>WizardPage</code> implementation of this method
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261 * declared on <code>DialogPage</code> updates the container
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262 * if this is the current page.
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263 */
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264 public override void setErrorMessage(String newMessage) {
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265 super.setErrorMessage(newMessage);
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266 if (isCurrentPage()) {
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267 getContainer().updateMessage();
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268 }
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269 }
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270
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271 /**
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272 * The <code>WizardPage</code> implementation of this method
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273 * declared on <code>DialogPage</code> updates the container
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274 * if this page is the current page.
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275 */
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276 public override void setImageDescriptor(ImageDescriptor image) {
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277 super.setImageDescriptor(image);
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278 if (isCurrentPage()) {
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279 getContainer().updateTitleBar();
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280 }
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281 }
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282
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283 /**
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284 * The <code>WizardPage</code> implementation of this method
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285 * declared on <code>DialogPage</code> updates the container
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286 * if this is the current page.
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287 */
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288 public override void setMessage(String newMessage, int newType) {
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289 super.setMessage(newMessage, newType);
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290 if (isCurrentPage()) {
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291 getContainer().updateMessage();
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292 }
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293 }
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294
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295 /**
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296 * Sets whether this page is complete.
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297 * <p>
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298 * This information is typically used by the wizard to decide
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299 * when it is okay to move on to the next page or finish up.
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300 * </p>
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301 *
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302 * @param complete <code>true</code> if this page is complete, and
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303 * and <code>false</code> otherwise
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304 * @see #isPageComplete()
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305 */
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306 public void setPageComplete(bool complete) {
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307 isPageComplete_ = complete;
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308 if (isCurrentPage()) {
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309 getContainer().updateButtons();
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310 }
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311 }
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312
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313 /* (non-Javadoc)
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314 * Method declared on IWizardPage.
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315 */
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316 public void setPreviousPage(IWizardPage page) {
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317 previousPage = page;
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318 }
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319
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320 /**
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321 * The <code>WizardPage</code> implementation of this <code>IDialogPage</code>
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322 * method extends the <code>DialogPage</code> implementation to update
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323 * the wizard container title bar. Subclasses may extend.
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324 */
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325 public override void setTitle(String title) {
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326 super.setTitle(title);
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327 if (isCurrentPage()) {
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328 getContainer().updateTitleBar();
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329 }
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330 }
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331
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332 /* (non-Javadoc)
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333 * Method declared on IWizardPage.
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334 */
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335 public void setWizard(IWizard newWizard) {
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336 wizard = newWizard;
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337 }
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338
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339 /**
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340 * Returns a printable representation of this wizard page suitable
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341 * only for debug purposes.
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342 */
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343 public override String toString() {
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344 return name;
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345 }
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346 }