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annotate org.eclipse.jface.examples.databinding/src/org/eclipse/jface/examples/databinding/snippets/Snippet013TableViewerEditing.d @ 90:6086085e153d

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Added databinding snippets. unmodified java sources.
author Frank Benoit <benoit@tionex.de>
date Sun, 19 Apr 2009 11:33:55 +0200
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children 5d5bd660917f
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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 * The Pampered Chef, Inc. - initial API and implementation
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10 * Tom Schindl - cell editing
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11 * Matthew Hall - bugs 260329, 260337
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12 ******************************************************************************/
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13
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14 package org.eclipse.jface.examples.databinding.snippets;
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15
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16 import java.beans.PropertyChangeListener;
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17 import java.beans.PropertyChangeSupport;
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18 import java.util.LinkedList;
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19 import java.util.List;
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20
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21 import org.eclipse.core.databinding.DataBindingContext;
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22 import org.eclipse.core.databinding.beans.BeanProperties;
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23 import org.eclipse.core.databinding.beans.BeansObservables;
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24 import org.eclipse.core.databinding.observable.Realm;
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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.ObservableValueEditingSupport;
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29 import org.eclipse.jface.databinding.viewers.ViewerSupport;
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30 import org.eclipse.jface.databinding.viewers.ViewersObservables;
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31 import org.eclipse.jface.viewers.CellEditor;
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32 import org.eclipse.jface.viewers.ColumnViewer;
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33 import org.eclipse.jface.viewers.TableViewer;
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34 import org.eclipse.jface.viewers.TableViewerColumn;
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35 import org.eclipse.jface.viewers.TextCellEditor;
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36 import org.eclipse.jface.viewers.ViewerCell;
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37 import org.eclipse.swt.SWT;
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38 import org.eclipse.swt.layout.FillLayout;
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39 import org.eclipse.swt.widgets.Composite;
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40 import org.eclipse.swt.widgets.Display;
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41 import org.eclipse.swt.widgets.Label;
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42 import org.eclipse.swt.widgets.Shell;
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43 import org.eclipse.swt.widgets.Table;
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44
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45 /**
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46 * Demonstrates binding a TableViewer to a collection using the 3.3 Viewer APIs.
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47 */
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48 public class Snippet013TableViewerEditing {
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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 Realm.runWithDefault(SWTObservables.getRealm(display), new Runnable() {
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52 public void run() {
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53 ViewModel viewModel = new ViewModel();
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54 Shell shell = new View(viewModel).createShell();
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55
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56 // The SWT event loop
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57 while (!shell.isDisposed()) {
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58 if (!display.readAndDispatch()) {
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59 display.sleep();
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60 }
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61 }
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62 }
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63 });
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64 }
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65
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66 // Minimal JavaBeans support
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67 public static abstract class AbstractModelObject {
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68 private PropertyChangeSupport propertyChangeSupport = new PropertyChangeSupport(
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69 this);
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70
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71 public void addPropertyChangeListener(PropertyChangeListener listener) {
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72 propertyChangeSupport.addPropertyChangeListener(listener);
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73 }
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74
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75 public void addPropertyChangeListener(String propertyName,
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76 PropertyChangeListener listener) {
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77 propertyChangeSupport.addPropertyChangeListener(propertyName,
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78 listener);
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79 }
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80
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81 public void removePropertyChangeListener(PropertyChangeListener listener) {
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82 propertyChangeSupport.removePropertyChangeListener(listener);
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83 }
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84
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85 public void removePropertyChangeListener(String propertyName,
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86 PropertyChangeListener listener) {
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87 propertyChangeSupport.removePropertyChangeListener(propertyName,
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88 listener);
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89 }
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90
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91 protected void firePropertyChange(String propertyName, Object oldValue,
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92 Object newValue) {
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93 propertyChangeSupport.firePropertyChange(propertyName, oldValue,
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94 newValue);
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95 }
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96 }
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97
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98 // The data model class. This is normally a persistent class of some sort.
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99 static class Person extends AbstractModelObject {
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100 // A property...
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101 String name = "John Smith";
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102
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103 public Person(String name) {
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104 this.name = name;
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105 }
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106
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107 public String getName() {
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108 return name;
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109 }
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110
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111 public void setName(String name) {
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112 String oldValue = this.name;
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113 this.name = name;
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114 firePropertyChange("name", oldValue, name);
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115 }
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116 }
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117
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118 // The View's model--the root of our Model graph for this particular GUI.
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119 //
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120 // Typically each View class has a corresponding ViewModel class.
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121 // The ViewModel is responsible for getting the objects to edit from the
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122 // data access tier. Since this snippet doesn't have any persistent objects
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123 // ro retrieve, this ViewModel just instantiates a model object to edit.
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124 static class ViewModel {
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125 // The model to bind
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126 private List people = new LinkedList();
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127 {
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128 people.add(new Person("Steve Northover"));
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129 people.add(new Person("Grant Gayed"));
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130 people.add(new Person("Veronika Irvine"));
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131 people.add(new Person("Mike Wilson"));
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132 people.add(new Person("Christophe Cornu"));
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133 people.add(new Person("Lynne Kues"));
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134 people.add(new Person("Silenio Quarti"));
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135 }
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136
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137 public List getPeople() {
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138 return people;
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139 }
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140 }
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141
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142 /**
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143 * Editing support that uses JFace Data Binding to control the editing
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144 * lifecycle. The standard EditingSupport get/setValue(...) lifecycle is not
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145 * used.
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146 *
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147 * @since 3.3
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148 */
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149 private static class InlineEditingSupport extends
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150 ObservableValueEditingSupport {
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151 private CellEditor cellEditor;
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152
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153 /**
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154 * @param viewer
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155 * @param dbc
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156 */
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157 public InlineEditingSupport(ColumnViewer viewer, DataBindingContext dbc) {
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158
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159 super(viewer, dbc);
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160 cellEditor = new TextCellEditor((Composite) viewer.getControl());
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161 }
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162
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163 protected CellEditor getCellEditor(Object element) {
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164 return cellEditor;
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165 }
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166
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167 protected IObservableValue doCreateCellEditorObservable(
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168 CellEditor cellEditor) {
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169
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170 return SWTObservables.observeText(cellEditor.getControl(),
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171 SWT.Modify);
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172 }
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173
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174 protected IObservableValue doCreateElementObservable(Object element,
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175 ViewerCell cell) {
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176 return BeansObservables.observeValue(element, "name");
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177 }
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178 }
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179
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180 // The GUI view
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181 static class View {
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182 private ViewModel viewModel;
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183 private Table committers;
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184 private Label selectedCommitter;
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185
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186 public View(ViewModel viewModel) {
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187 this.viewModel = viewModel;
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188 }
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189
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190 public Shell createShell() {
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191 // Build a UI
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192 Display display = Display.getDefault();
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193 Shell shell = new Shell(display);
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194 shell.setLayout(new FillLayout(SWT.VERTICAL));
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195 committers = new Table(shell, SWT.BORDER | SWT.FULL_SELECTION);
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196 committers.setLinesVisible(true);
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197
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198 selectedCommitter = new Label(shell, SWT.NONE);
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199 // Set up data binding. In an RCP application, the threading
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200 // Realm
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201 // will be set for you automatically by the Workbench. In an SWT
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202 // application, you can do this once, wrpping your binding
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203 // method call.
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204 DataBindingContext bindingContext = new DataBindingContext();
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205 bindGUI(bindingContext);
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206
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207 // Open and return the Shell
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208 shell.setSize(100, 300);
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209 shell.open();
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210 return shell;
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211 }
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212
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213 protected void bindGUI(DataBindingContext bindingContext) {
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214 // Since we're using a JFace Viewer, we do first wrap our Table...
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215 TableViewer peopleViewer = new TableViewer(committers);
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216 TableViewerColumn column = new TableViewerColumn(peopleViewer,
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217 SWT.NONE);
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218 column.setEditingSupport(new InlineEditingSupport(peopleViewer,
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219 bindingContext));
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220 column.getColumn().setWidth(100);
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221
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222 // Bind viewer to model
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223 ViewerSupport.bind(peopleViewer, new WritableList(viewModel
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224 .getPeople(), Person.class), BeanProperties.value(
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225 Person.class, "name"));
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226
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227 // bind selectedCommitter label to the name of the current selection
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228 IObservableValue selection = ViewersObservables
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229 .observeSingleSelection(peopleViewer);
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230 bindingContext.bindValue(SWTObservables
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231 .observeText(selectedCommitter), BeansObservables
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232 .observeDetailValue(selection, "name", String.class));
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233 }
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234 }
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235
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236 }