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annotate org.eclipse.jface.examples.databinding/src/org/eclipse/jface/examples/databinding/snippets/Snippet021MultiFieldValidation.d @ 125:c43718956f21 default tip

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Updated the snippets status.
author Jacob Carlborg <doob@me.com>
date Thu, 11 Aug 2011 19:55:14 +0200
parents e884642ad36e
children
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1 /*******************************************************************************
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2 * Copyright (c) 2008 Matthew Hall 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 * Matthew Hall - initial API and implementation (bug 218269)
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10 * Matthew Hall - bug 260329
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11 ******************************************************************************/
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12
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13 module org.eclipse.jface.examples.databinding.snippets.Snippet021MultiFieldValidation;
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14
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15 import java.lang.all;
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16
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17 import java.util.ArrayList;
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18 import java.util.Iterator;
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19
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20 import org.eclipse.core.databinding.DataBindingContext;
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21 import org.eclipse.core.databinding.observable.Realm;
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22 import org.eclipse.core.databinding.observable.list.IObservableList;
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23 import org.eclipse.core.databinding.observable.list.WritableList;
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24 import org.eclipse.core.databinding.observable.value.IObservableValue;
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25 import org.eclipse.core.databinding.observable.value.WritableValue;
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26 import org.eclipse.core.databinding.validation.MultiValidator;
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27 import org.eclipse.core.databinding.validation.ValidationStatus;
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28 import org.eclipse.core.runtime.IStatus;
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29 import org.eclipse.jface.databinding.swt.SWTObservables;
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30 import org.eclipse.jface.databinding.viewers.ObservableListContentProvider;
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31 import org.eclipse.jface.databinding.wizard.WizardPageSupport;
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32 import org.eclipse.jface.dialogs.IInputValidator;
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33 import org.eclipse.jface.dialogs.InputDialog;
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34 import org.eclipse.jface.viewers.IStructuredSelection;
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35 import org.eclipse.jface.viewers.ListViewer;
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36 import org.eclipse.jface.window.Window;
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37 import org.eclipse.jface.wizard.IWizard;
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38 import org.eclipse.jface.wizard.Wizard;
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39 import org.eclipse.jface.wizard.WizardDialog;
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40 import org.eclipse.jface.wizard.WizardPage;
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41 import org.eclipse.swt.SWT;
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42 import org.eclipse.swt.events.SelectionAdapter;
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43 import org.eclipse.swt.events.SelectionEvent;
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44 import org.eclipse.swt.layout.GridData;
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45 import org.eclipse.swt.layout.GridLayout;
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46 import org.eclipse.swt.widgets.Button;
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47 import org.eclipse.swt.widgets.Composite;
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48 import org.eclipse.swt.widgets.Display;
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49 import org.eclipse.swt.widgets.Group;
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50 import org.eclipse.swt.widgets.Label;
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51 import org.eclipse.swt.widgets.List;
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52 import org.eclipse.swt.widgets.Text;
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53
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54 /**
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55 * @since 3.2
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56 *
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57 */
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58 public class Snippet021MultiFieldValidation : WizardPage {
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60 private List list_1;
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61 private List list;
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62 private Button addAddendButton;
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63 private Button removeAddendButton;
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64 private Text sumModelValue;
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65 private Text field2ModelValue;
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66 private Text field1ModelValue;
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67 private Text sumTarget;
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68 private Text field2Target;
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69 private Text field1Target;
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70 private ListViewer addendsTarget;
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71 private ListViewer addendsModelValue;
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72
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73 /**
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74 * Create the wizard
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75 */
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76 public Snippet021MultiFieldValidation() {
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77 super("snippet021");
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78 setTitle("Snippet 021 - Multi-field Validators");
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79 setDescription("Enter values which satisfy the cross-field constraints");
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80 }
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82 /**
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83 * Create contents of the wizard
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84 *
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85 * @param parent
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86 */
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87 public void createControl(Composite parent) {
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88 Composite container = new Composite(parent, SWT.NULL);
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89 final GridLayout gridLayout = new GridLayout();
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90 gridLayout.numColumns = 2;
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91 container.setLayout(gridLayout);
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92 //
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93 setControl(container);
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94
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95 final Group bothEvenOrGroup = new Group(container, SWT.NONE);
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96 bothEvenOrGroup.setLayoutData(new GridData(SWT.FILL, SWT.FILL, false,
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97 false));
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98 bothEvenOrGroup.setText("Numbers must be both even or both odd");
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99 final GridLayout gridLayout_1 = new GridLayout();
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100 gridLayout_1.numColumns = 3;
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101 bothEvenOrGroup.setLayout(gridLayout_1);
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102 new Label(bothEvenOrGroup, SWT.NONE);
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103
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104 final Label targetLabel = new Label(bothEvenOrGroup, SWT.NONE);
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105 targetLabel.setText("Target");
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107 final Label modelLabel = new Label(bothEvenOrGroup, SWT.NONE);
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108 modelLabel.setText("Model");
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110 final Label field1Label = new Label(bothEvenOrGroup, SWT.NONE);
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111 field1Label.setText("Field 1");
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112
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113 field1Target = new Text(bothEvenOrGroup, SWT.BORDER);
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114 final GridData gd_field1Target = new GridData(SWT.FILL, SWT.CENTER,
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115 true, false);
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116 field1Target.setLayoutData(gd_field1Target);
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118 field1ModelValue = new Text(bothEvenOrGroup, SWT.READ_ONLY | SWT.BORDER);
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119 final GridData gd_field1ModelValue = new GridData(SWT.FILL, SWT.CENTER,
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120 true, false);
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121 field1ModelValue.setLayoutData(gd_field1ModelValue);
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123 final Label field2Label = new Label(bothEvenOrGroup, SWT.NONE);
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124 field2Label.setText("Field 2");
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126 field2Target = new Text(bothEvenOrGroup, SWT.BORDER);
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127 final GridData gd_field2Target = new GridData(SWT.FILL, SWT.CENTER,
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128 true, false);
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129 field2Target.setLayoutData(gd_field2Target);
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131 field2ModelValue = new Text(bothEvenOrGroup, SWT.READ_ONLY | SWT.BORDER);
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132 final GridData gd_field2ModelValue = new GridData(SWT.FILL, SWT.CENTER,
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133 true, false);
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134 field2ModelValue.setLayoutData(gd_field2ModelValue);
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135
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136 final Group sumOfAllGroup = new Group(container, SWT.NONE);
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137 sumOfAllGroup.setLayoutData(new GridData(SWT.FILL, SWT.FILL, false,
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138 true));
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139 sumOfAllGroup.setText("Addends must add up to sum");
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140 final GridLayout gridLayout_2 = new GridLayout();
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141 gridLayout_2.numColumns = 3;
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142 sumOfAllGroup.setLayout(gridLayout_2);
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143 new Label(sumOfAllGroup, SWT.NONE);
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144
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145 final Label targetLabel_1 = new Label(sumOfAllGroup, SWT.NONE);
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146 targetLabel_1.setText("Target");
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147
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148 final Label modelLabel_1 = new Label(sumOfAllGroup, SWT.NONE);
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149 modelLabel_1.setText("Model");
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150
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151 final Label expectedSumLabel = new Label(sumOfAllGroup, SWT.NONE);
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152 expectedSumLabel.setText("Sum");
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153
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154 sumTarget = new Text(sumOfAllGroup, SWT.BORDER);
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155 final GridData gd_sumTarget = new GridData(SWT.FILL, SWT.CENTER, true,
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156 false);
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157 sumTarget.setLayoutData(gd_sumTarget);
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158
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159 sumModelValue = new Text(sumOfAllGroup, SWT.READ_ONLY | SWT.BORDER);
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160 final GridData gd_sumModelValue = new GridData(SWT.FILL, SWT.CENTER,
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161 true, false);
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162 sumModelValue.setLayoutData(gd_sumModelValue);
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163
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164 final Label addendsLabel = new Label(sumOfAllGroup, SWT.NONE);
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165 addendsLabel.setText("Addends");
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166
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167 addendsTarget = new ListViewer(sumOfAllGroup, SWT.V_SCROLL | SWT.BORDER);
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168 list_1 = addendsTarget.getList();
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169 list_1
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170 .setLayoutData(new GridData(SWT.FILL, SWT.FILL, false, true, 1,
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171 2));
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172
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173 addendsModelValue = new ListViewer(sumOfAllGroup, SWT.V_SCROLL
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174 | SWT.BORDER);
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175 list = addendsModelValue.getList();
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176 list.setLayoutData(new GridData(SWT.FILL, SWT.FILL, false, true, 1, 2));
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177
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178 final Composite composite = new Composite(sumOfAllGroup, SWT.NONE);
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179 composite.setLayoutData(new GridData(SWT.FILL, SWT.FILL, false, false));
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180 final GridLayout gridLayout_3 = new GridLayout();
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181 gridLayout_3.marginWidth = 0;
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182 gridLayout_3.marginHeight = 0;
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183 composite.setLayout(gridLayout_3);
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184
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185 addAddendButton = new Button(composite, SWT.NONE);
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186 addAddendButton.setLayoutData(new GridData(SWT.FILL, SWT.CENTER, false,
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187 false));
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188 addAddendButton.setText("Add");
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189
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190 removeAddendButton = new Button(composite, SWT.NONE);
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191 removeAddendButton.setLayoutData(new GridData(SWT.FILL, SWT.CENTER,
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192 false, false));
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193 removeAddendButton.setText("Remove");
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194
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195 bindUI();
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196 }
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197
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198 private void bindUI() {
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199 DataBindingContext dbc = new DataBindingContext();
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200
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201 bindEvensAndOddsGroup(dbc);
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202 bindSumAndAddendsGroup(dbc);
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203
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204 WizardPageSupport.create(this, dbc);
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205 }
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206
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207 private void bindEvensAndOddsGroup(DataBindingContext dbc) {
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208 IObservableValue targetField1 = SWTObservables.observeText(
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209 field1Target, SWT.Modify);
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210 final IObservableValue middleField1 = new WritableValue(null,
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211 Integer.TYPE);
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212 dbc.bindValue(targetField1, middleField1);
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213
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214 IObservableValue targetField2 = SWTObservables.observeText(
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215 field2Target, SWT.Modify);
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216 final IObservableValue middleField2 = new WritableValue(null,
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217 Integer.TYPE);
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218 dbc.bindValue(targetField2, middleField2);
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219
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220 MultiValidator validator = new MultiValidator() {
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221 protected IStatus validate() {
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222 Integer field1 = (Integer) middleField1.getValue();
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223 Integer field2 = (Integer) middleField2.getValue();
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224 if (Math.abs(field1.intValue()) % 2 !is Math.abs(field2
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225 .intValue()) % 2)
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226 return ValidationStatus
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227 .error("Fields 1 and 2 must be both even or both odd");
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228 return null;
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229 }
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230 };
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231 dbc.addValidationStatusProvider(validator);
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232
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233 IObservableValue modelField1 = new WritableValue(new Integer(1),
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234 Integer.TYPE);
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235 IObservableValue modelField2 = new WritableValue(new Integer(4),
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236 Integer.TYPE);
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237 dbc.bindValue(validator.observeValidatedValue(middleField1),
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238 modelField1);
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239 dbc.bindValue(validator.observeValidatedValue(middleField2),
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240 modelField2);
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241
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242 dbc.bindValue(SWTObservables.observeText(field1ModelValue, SWT.Modify),
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243 modelField1);
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244 dbc.bindValue(SWTObservables.observeText(field2ModelValue, SWT.Modify),
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245 modelField2);
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246 }
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247
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248 private void bindSumAndAddendsGroup(DataBindingContext dbc) {
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249 IObservableValue targetSum = SWTObservables.observeText(sumTarget,
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250 SWT.Modify);
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251 final IObservableValue middleSum = new WritableValue(null, Integer.TYPE);
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252 dbc.bindValue(targetSum, middleSum);
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253
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254 final IObservableList targetAddends = new WritableList(new ArrayList(),
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255 Integer.TYPE);
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256 addendsTarget.setContentProvider(new ObservableListContentProvider());
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257 addendsTarget.setInput(targetAddends);
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258
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259 addAddendButton.addSelectionListener(new SelectionAdapter() {
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260 public void widgetSelected(final SelectionEvent e) {
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261 InputDialog dialog = new InputDialog(getShell(),
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262 "Input addend", "Enter an integer addend", "0",
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263 new IInputValidator() {
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264 public String isValid(String newText) {
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265 try {
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266 Integer.valueOf(newText);
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267 return null;
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268 } catch (NumberFormatException e) {
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269 return "Enter a number between "
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270 + Integer.MIN_VALUE + " and "
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271 + Integer.MAX_VALUE;
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272 }
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273 }
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274 });
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275 if (dialog.open() is Window.OK) {
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276 targetAddends.add(Integer.valueOf(dialog.getValue()));
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277 }
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278 }
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279 });
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280
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281 removeAddendButton.addSelectionListener(new SelectionAdapter() {
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282 public void widgetSelected(SelectionEvent e) {
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283 IStructuredSelection selection = (IStructuredSelection) addendsTarget
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284 .getSelection();
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285 if (!selection.isEmpty())
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286 targetAddends.remove(selection.getFirstElement());
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287 }
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288 });
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289
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290 IObservableValue modelSum = new WritableValue(new Integer(5),
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291 Integer.TYPE);
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292 dbc.bindValue(SWTObservables.observeText(sumModelValue, SWT.Modify),
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293 modelSum);
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294
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295 IObservableList modelAddends = new WritableList(new ArrayList(),
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296 Integer.TYPE);
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298 MultiValidator validator = new MultiValidator() {
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299 protected IStatus validate() {
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300 Integer sum = (Integer) middleSum.getValue();
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301 int actualSum = 0;
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302 for (Iterator iterator = targetAddends.iterator(); iterator
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303 .hasNext();) {
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304 actualSum += ((Integer) iterator.next()).intValue();
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305 }
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306 if (sum.intValue() !is actualSum)
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307 return ValidationStatus.error("Sum of addends is "
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308 + actualSum + ", expecting " + sum);
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309 return ValidationStatus.ok();
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310 }
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311 };
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312 dbc.addValidationStatusProvider(validator);
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313
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314 addendsModelValue
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315 .setContentProvider(new ObservableListContentProvider());
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316 addendsModelValue.setInput(modelAddends);
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317
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318 dbc.bindValue(validator.observeValidatedValue(middleSum), modelSum);
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319 dbc.bindList(validator.observeValidatedList(targetAddends),
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320 modelAddends);
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321 }
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322
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323 static class MultiFieldValidationWizard : Wizard {
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324 public void addPages() {
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325 addPage(new Snippet021MultiFieldValidation());
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326 }
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327
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328 public String getWindowTitle() {
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329 return "Snippet 021 - Multi-field Validation";
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330 }
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331
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332 public bool performFinish() {
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333 return true;
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334 }
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335 }
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336
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337 public static void main(String[] args) {
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338 Display display = new Display();
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339
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340 Realm.runWithDefault(SWTObservables.getRealm(display), new Runnable() {
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341 public void run() {
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342 IWizard wizard = new MultiFieldValidationWizard();
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343 WizardDialog dialog = new WizardDialog(null, wizard);
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344 dialog.open();
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345
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346 // The SWT event loop
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347 Display display = Display.getCurrent();
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348 while (dialog.getShell() !is null
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349 && !dialog.getShell().isDisposed()) {
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350 if (!display.readAndDispatch()) {
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351 display.sleep();
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352 }
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353 }
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354 }
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355 });
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356
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357 display.dispose();
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358 }
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359 }
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360 void main( String[] args ){
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361 Snippet021MultiFieldValidation.main(args);
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362 }