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annotate org.eclipse.jface.examples.databinding/src/org/eclipse/jface/examples/databinding/snippets/Snippet017TableViewerWithDerivedColumns.d @ 100:e884642ad36e

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more work on examples
author Frank Benoit <benoit@tionex.de>
date Thu, 23 Apr 2009 00:02:38 +0200
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1 /*******************************************************************************
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2 * Copyright (c) 2006 The Pampered Chef, Inc. 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 * Coconut Palm Software, Inc. - Initial API and implementation
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10 * Matthew Hall - bugs 260329, 260337
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11 ******************************************************************************/
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12
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13 module org.eclipse.jface.examples.databinding.snippets.Snippet017TableViewerWithDerivedColumns;
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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.beans.PropertyChangeListener;
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18 import java.beans.PropertyChangeSupport;
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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.beans.BeanProperties;
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22 import org.eclipse.core.databinding.beans.BeansObservables;
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23 import org.eclipse.core.databinding.observable.Realm;
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24 import org.eclipse.core.databinding.observable.list.IObservableList;
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25 import org.eclipse.core.databinding.observable.list.WritableList;
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26 import org.eclipse.core.databinding.observable.value.IObservableValue;
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27 import org.eclipse.jface.databinding.swt.SWTObservables;
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28 import org.eclipse.jface.databinding.viewers.ViewerSupport;
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29 import org.eclipse.jface.databinding.viewers.ViewersObservables;
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30 import org.eclipse.jface.layout.GridDataFactory;
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31 import org.eclipse.jface.layout.GridLayoutFactory;
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32 import org.eclipse.jface.viewers.ComboViewer;
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33 import org.eclipse.jface.viewers.TableViewer;
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34 import org.eclipse.jface.viewers.Viewer;
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35 import org.eclipse.jface.viewers.ViewerFilter;
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36 import org.eclipse.swt.SWT;
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37 import org.eclipse.swt.widgets.Combo;
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38 import org.eclipse.swt.widgets.Display;
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39 import org.eclipse.swt.widgets.Label;
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40 import org.eclipse.swt.widgets.Shell;
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41 import org.eclipse.swt.widgets.Table;
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42 import org.eclipse.swt.widgets.TableColumn;
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43 import org.eclipse.swt.widgets.Text;
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44
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45 /**
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46 * Demonstrates binding a TableViewer to a collection.
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47 */
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48 public class Snippet017TableViewerWithDerivedColumns {
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49 public static void main(String[] args) {
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50 final Display display = new Display();
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51
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52 // Set up data binding. In an RCP application, the threading Realm
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53 // will be set for you automatically by the Workbench. In an SWT
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54 // application, you can do this once, wrapping your binding
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55 // method call.
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56 Realm.runWithDefault(SWTObservables.getRealm(display), new Runnable() {
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57 public void run() {
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58 ViewModel viewModel = new ViewModel();
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59 Shell shell = new View(viewModel).createShell();
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61 // The SWT event loop
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62 while (!shell.isDisposed()) {
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63 if (!display.readAndDispatch()) {
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64 display.sleep();
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65 }
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66 }
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67 }
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68 });
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69 }
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71 // Minimal JavaBeans support
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72 public static abstract class AbstractModelObject {
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73 private PropertyChangeSupport propertyChangeSupport = new PropertyChangeSupport(
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74 this);
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76 public void addPropertyChangeListener(PropertyChangeListener listener) {
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77 propertyChangeSupport.addPropertyChangeListener(listener);
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78 }
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80 public void addPropertyChangeListener(String propertyName,
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81 PropertyChangeListener listener) {
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82 propertyChangeSupport.addPropertyChangeListener(propertyName,
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83 listener);
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84 }
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86 public void removePropertyChangeListener(PropertyChangeListener listener) {
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87 propertyChangeSupport.removePropertyChangeListener(listener);
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88 }
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90 public void removePropertyChangeListener(String propertyName,
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91 PropertyChangeListener listener) {
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92 propertyChangeSupport.removePropertyChangeListener(propertyName,
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93 listener);
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94 }
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96 protected void firePropertyChange(String propertyName, Object oldValue,
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97 Object newValue) {
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98 propertyChangeSupport.firePropertyChange(propertyName, oldValue,
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99 newValue);
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100 }
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101 }
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102
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103 private static Person UNKNOWN = new Person("unknown", null, null);
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104
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105 // The data model class. This is normally a persistent class of some sort.
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106 static class Person : AbstractModelObject {
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107 // A property...
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108 String name = "Donald Duck";
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109 Person mother;
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110 Person father;
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111
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112 public Person(String name, Person mother, Person father) {
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113 this.name = name;
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114 this.mother = mother;
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115 this.father = father;
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116 }
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118 public String getName() {
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119 return name;
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120 }
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122 public void setName(String name) {
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123 String oldValue = this.name;
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124 this.name = name;
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125 firePropertyChange("name", oldValue, name);
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126 }
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128 public Person getMother() {
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129 return mother;
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130 }
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132 public void setMother(Person mother) {
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133 firePropertyChange("mother", this.mother, this.mother = mother);
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134 }
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136 public Person getFather() {
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137 return father;
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138 }
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140 public void setFather(Person father) {
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141 firePropertyChange("father", this.father, this.father = father);
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142 }
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144 public String toString() {
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145 return name;
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146 }
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147 }
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149 // The View's model--the root of our Model graph for this particular GUI.
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150 //
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151 // Typically each View class has a corresponding ViewModel class.
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152 // The ViewModel is responsible for getting the objects to edit from the
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153 // data access tier. Since this snippet doesn't have any persistent objects
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154 // ro retrieve, this ViewModel just instantiates a model object to edit.
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155 static class ViewModel {
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156 // The model to bind
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157 private IObservableList people = new WritableList();
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158 {
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159 Person fergus = new Person("Fergus McDuck", UNKNOWN, UNKNOWN);
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160 Person downy = new Person("Downy O'Drake", UNKNOWN, UNKNOWN);
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161 Person scrooge = new Person("Scrooge McDuck", downy, fergus);
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162 Person hortense = new Person("Hortense McDuck", downy, fergus);
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163 Person quackmore = new Person("Quackmore Duck", UNKNOWN, UNKNOWN);
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164 Person della = new Person("Della Duck", hortense, quackmore);
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165 Person donald = new Person("Donald Duck", hortense, quackmore);
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166 donald.setFather(quackmore);
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167 donald.setMother(hortense);
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168 della.setFather(quackmore);
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169 della.setMother(hortense);
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170 hortense.setMother(downy);
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171 hortense.setFather(fergus);
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172 scrooge.setMother(downy);
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173 scrooge.setFather(fergus);
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174 people.add(UNKNOWN);
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175 people.add(downy);
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176 people.add(fergus);
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177 people.add(scrooge);
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178 people.add(quackmore);
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179 people.add(hortense);
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180 people.add(della);
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181 people.add(donald);
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182 }
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183
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184 public IObservableList getPeople() {
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185 return people;
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186 }
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187 }
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188
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189 // The GUI view
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190 static class View {
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191 private ViewModel viewModel;
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192 private Table duckFamily;
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193 private Text nameText;
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194 private Combo motherCombo;
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195 private Combo fatherCombo;
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196
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197 public View(ViewModel viewModel) {
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198 this.viewModel = viewModel;
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199 }
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200
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201 public Shell createShell() {
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202 // Build a UI
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203 Display display = Display.getDefault();
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204 Shell shell = new Shell(display);
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205 duckFamily = new Table(shell, SWT.BORDER | SWT.FULL_SELECTION);
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206 duckFamily.setHeaderVisible(true);
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207 GridDataFactory.defaultsFor(duckFamily).span(2, 1).applyTo(
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208 duckFamily);
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209 createColumn("Name");
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210 createColumn("Mother");
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211 createColumn("Father");
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212 createColumn("Grandmother");
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213 duckFamily.setLinesVisible(true);
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214
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215 new Label(shell, SWT.NONE).setText("Name:");
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216 nameText = new Text(shell, SWT.BORDER);
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217 GridDataFactory.defaultsFor(nameText).grab(true, false).applyTo(
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218 nameText);
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219
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220 new Label(shell, SWT.NONE).setText("Mother:");
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221 motherCombo = new Combo(shell, SWT.READ_ONLY);
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222
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223 new Label(shell, SWT.NONE).setText("Father:");
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224 fatherCombo = new Combo(shell, SWT.READ_ONLY);
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225
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226 DataBindingContext bindingContext = new DataBindingContext();
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227 bindGUI(bindingContext);
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228
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229 GridLayoutFactory.swtDefaults().numColumns(2).applyTo(shell);
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230 // Open and return the Shell
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231 shell.setSize(500, 300);
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232 shell.open();
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233 return shell;
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234 }
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235
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236 private void createColumn(String string) {
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237 final TableColumn column = new TableColumn(duckFamily, SWT.NONE);
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238 column.setWidth(100);
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239 column.setText(string);
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240 }
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241
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242 protected void bindGUI(DataBindingContext bindingContext) {
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243 // Since we're using a JFace Viewer, we do first wrap our Table...
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244 TableViewer peopleViewer = new TableViewer(duckFamily);
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245 peopleViewer.addFilter(new ViewerFilter() {
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246 public bool select(Viewer viewer, Object parentElement,
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247 Object element) {
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248 return element !is UNKNOWN;
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249 }
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250 });
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251
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252 // Bind viewers to model
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253 ViewerSupport.bind(peopleViewer, viewModel.getPeople(),
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254 BeanProperties.values(new String[] { "name", "mother.name",
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255 "father.name", "mother.mother.name" }));
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256
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257 // Bind viewer selection to detail fields
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258 IObservableValue selection = ViewersObservables
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259 .observeSingleSelection(peopleViewer);
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260 bindingContext.bindValue(SWTObservables.observeText(nameText,
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261 SWT.Modify), BeansObservables.observeDetailValue(selection,
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262 "name", String.class));
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263
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264 ComboViewer mothercomboViewer = new ComboViewer(motherCombo);
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265 ViewerSupport.bind(mothercomboViewer, viewModel.getPeople(),
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266 BeanProperties.value("name"));
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267 bindingContext.bindValue(ViewersObservables
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268 .observeSingleSelection(mothercomboViewer),
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269 BeansObservables.observeDetailValue(selection, "mother",
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270 Person.class));
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271
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272 ComboViewer fatherComboViewer = new ComboViewer(fatherCombo);
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273 ViewerSupport.bind(fatherComboViewer, viewModel.getPeople(),
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274 BeanProperties.value("name"));
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275 bindingContext.bindValue(ViewersObservables
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276 .observeSingleSelection(fatherComboViewer),
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277 BeansObservables.observeDetailValue(selection, "father",
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278 Person.class));
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279 }
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280 }
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281
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282 }
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283 void main( String[] args ){
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284 Snippet017TableViewerWithDerivedColumns.main(args);
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285 }