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annotate org.eclipse.jface.examples.databinding/src/org/eclipse/jface/examples/databinding/snippets/Snippet020TreeViewerWithSetFactory.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) 2005, 2008 IBM Corporation and others.
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3 * All rights reserved. This program and the accompanying materials
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4 * are made available under the terms of the Eclipse Public License v1.0
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5 * which accompanies this distribution, and is available at
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6 * http://www.eclipse.org/legal/epl-v10.html
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7 *
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8 * Contributors:
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9 * IBM Corporation - initial API and implementation
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10 * Matthew Hall - bugs 260329, 260337
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11 *******************************************************************************/
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12 module org.eclipse.jface.examples.databinding.snippets.Snippet020TreeViewerWithSetFactory;
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13
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14 import java.lang.all;
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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.HashSet;
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19 import java.util.Set;
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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.value.ComputedValue;
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26 import org.eclipse.core.databinding.observable.value.IObservableValue;
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27 import org.eclipse.core.databinding.observable.value.WritableValue;
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28 import org.eclipse.jface.databinding.swt.SWTObservables;
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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.IStructuredSelection;
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32 import org.eclipse.jface.viewers.StructuredSelection;
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33 import org.eclipse.jface.viewers.TreeViewer;
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34 import org.eclipse.jface.viewers.ViewerComparator;
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35 import org.eclipse.swt.SWT;
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36 import org.eclipse.swt.events.SelectionAdapter;
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37 import org.eclipse.swt.events.SelectionEvent;
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38 import org.eclipse.swt.layout.GridData;
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39 import org.eclipse.swt.layout.GridLayout;
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40 import org.eclipse.swt.layout.RowLayout;
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41 import org.eclipse.swt.widgets.Button;
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42 import org.eclipse.swt.widgets.Composite;
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43 import org.eclipse.swt.widgets.Display;
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44 import org.eclipse.swt.widgets.Label;
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45 import org.eclipse.swt.widgets.Shell;
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46 import org.eclipse.swt.widgets.Text;
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47 import org.eclipse.swt.widgets.Tree;
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48 import org.eclipse.swt.widgets.TreeItem;
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49
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50 public class Snippet020TreeViewerWithSetFactory {
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51
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52 private Button pasteButton;
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53 private Button copyButton;
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54 private Shell shell;
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55 private Button addChildBeanButton;
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56 private Button removeBeanButton;
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57 private TreeViewer beanViewer;
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58 private Tree tree;
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59 private Text beanText;
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60 private DataBindingContext m_bindingContext;
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61
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62 private Bean input = createBean("input");
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63 private IObservableValue clipboard;
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64 static int counter = 0;
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65
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66 /**
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67 * Launch the application
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68 *
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69 * @param args
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70 */
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71 public static void main(String[] args) {
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72 Display display = Display.getDefault();
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73 Realm.runWithDefault(SWTObservables.getRealm(display), new Runnable() {
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74 public void run() {
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75 try {
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76 Snippet020TreeViewerWithSetFactory window = new Snippet020TreeViewerWithSetFactory();
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77 window.open();
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78 } catch (Exception e) {
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79 e.printStackTrace();
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80 }
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81 }
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82 });
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83 }
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85 /**
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86 * Open the window
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87 */
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88 public void open() {
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89 final Display display = Display.getDefault();
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90 createContents();
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91 shell.open();
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92 shell.layout();
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93 while (!shell.isDisposed()) {
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94 if (!display.readAndDispatch())
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95 display.sleep();
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96 }
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97 }
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98
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99 /**
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100 * Create contents of the window
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101 */
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102 protected void createContents() {
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103 shell = new Shell();
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104 final GridLayout gridLayout_1 = new GridLayout();
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105 gridLayout_1.numColumns = 2;
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106 shell.setLayout(gridLayout_1);
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107 shell.setSize(535, 397);
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108 shell.setText("SWT Application");
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109
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110 final Composite group = new Composite(shell, SWT.NONE);
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111 final RowLayout rowLayout = new RowLayout();
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112 rowLayout.marginTop = 0;
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113 rowLayout.marginRight = 0;
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114 rowLayout.marginLeft = 0;
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115 rowLayout.marginBottom = 0;
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116 rowLayout.pack = false;
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117 group.setLayout(rowLayout);
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118 group
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119 .setLayoutData(new GridData(SWT.FILL, SWT.FILL, false, false,
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120 2, 1));
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122 final Button addRootButton = new Button(group, SWT.NONE);
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123 addRootButton.addSelectionListener(new SelectionAdapter() {
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124 public void widgetSelected(final SelectionEvent e) {
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125 Set set = input.getSet();
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126 Bean root = createBean("root");
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127 set.add(root);
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128 input.setSet(set);
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129
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130 beanViewer.setSelection(new StructuredSelection(root));
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131 beanText.selectAll();
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132 beanText.setFocus();
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133 }
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134 });
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135 addRootButton.setText("Add Root");
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136
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137 addChildBeanButton = new Button(group, SWT.NONE);
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138 addChildBeanButton.addSelectionListener(new SelectionAdapter() {
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139 public void widgetSelected(final SelectionEvent e) {
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140 Bean parent = getSelectedBean();
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141 Set set = new HashSet(parent.getSet());
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142 Bean child = createBean("child" + (counter++));
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143 set.add(child);
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144 parent.setSet(set);
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145
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146 // beanViewer.setSelection(new StructuredSelection(parent));
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147 // beanText.selectAll();
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148 // beanText.setFocus();
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149 }
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150 });
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151 addChildBeanButton.setText("Add Child");
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152
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153 removeBeanButton = new Button(group, SWT.NONE);
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154 removeBeanButton.addSelectionListener(new SelectionAdapter() {
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155 public void widgetSelected(final SelectionEvent e) {
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156 TreeItem selectedItem = beanViewer.getTree().getSelection()[0];
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157 Bean bean = (Bean) selectedItem.getData();
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158 TreeItem parentItem = selectedItem.getParentItem();
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159 Bean parent;
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160 if (parentItem is null)
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161 parent = input;
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162 else
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163 parent = (Bean) parentItem.getData();
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164
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165 Set set = new HashSet(parent.getSet());
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166 set.remove(bean);
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167 parent.setSet(set);
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168 }
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169 });
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170 removeBeanButton.setText("Remove");
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171
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172 copyButton = new Button(group, SWT.NONE);
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173 copyButton.addSelectionListener(new SelectionAdapter() {
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174 public void widgetSelected(final SelectionEvent e) {
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175 clipboard.setValue(getSelectedBean());
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176 }
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177 });
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178 copyButton.setText("Copy");
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179
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180 pasteButton = new Button(group, SWT.NONE);
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181 pasteButton.addSelectionListener(new SelectionAdapter() {
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182 public void widgetSelected(final SelectionEvent e) {
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183 Bean copy = (Bean) clipboard.getValue();
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184 if (copy is null)
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185 return;
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186 Bean parent = getSelectedBean();
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187 if (parent is null)
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188 parent = input;
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189
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190 Set set = new HashSet(parent.getSet());
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191 set.add(copy);
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192 parent.setSet(set);
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193
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194 beanViewer.setSelection(new StructuredSelection(copy));
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195 beanText.selectAll();
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196 beanText.setFocus();
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197 }
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198 });
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199 pasteButton.setText("Paste");
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200
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201 final Button refreshButton = new Button(group, SWT.NONE);
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202 refreshButton.addSelectionListener(new SelectionAdapter() {
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203 public void widgetSelected(final SelectionEvent e) {
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204 beanViewer.refresh();
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205 }
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206 });
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207 refreshButton.setText("Refresh");
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208
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209 beanViewer = new TreeViewer(shell, SWT.FULL_SELECTION | SWT.BORDER);
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210 beanViewer.setUseHashlookup(true);
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211 beanViewer.setComparator(new ViewerComparator());
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212 tree = beanViewer.getTree();
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213 tree.setLayoutData(new GridData(SWT.FILL, SWT.FILL, true, true, 2, 1));
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214
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215 final Label itemNameLabel = new Label(shell, SWT.NONE);
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216 itemNameLabel.setText("Item Name");
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217
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218 beanText = new Text(shell, SWT.BORDER);
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219 final GridData gd_beanValue = new GridData(SWT.FILL, SWT.CENTER, true,
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220 false);
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221 beanText.setLayoutData(gd_beanValue);
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222 m_bindingContext = initDataBindings();
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223 //
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224 initExtraBindings(m_bindingContext);
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225 }
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226
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227 private static Bean createBean(String name) {
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228 return new Bean(name);
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229 }
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230
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231 protected DataBindingContext initDataBindings() {
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232 IObservableValue treeViewerSelectionObserveSelection = ViewersObservables
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233 .observeSingleSelection(beanViewer);
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234 IObservableValue textTextObserveWidget = SWTObservables.observeText(
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235 beanText, SWT.Modify);
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236 IObservableValue treeViewerValueObserveDetailValue = BeansObservables
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237 .observeDetailValue(treeViewerSelectionObserveSelection,
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238 "text", String.class);
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239 //
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240 //
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241 DataBindingContext bindingContext = new DataBindingContext();
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242 //
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243 bindingContext.bindValue(textTextObserveWidget,
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244 treeViewerValueObserveDetailValue);
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245 //
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246 return bindingContext;
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247 }
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248
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249 private Bean getSelectedBean() {
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250 IStructuredSelection selection = (IStructuredSelection) beanViewer
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251 .getSelection();
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252 if (selection.isEmpty())
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253 return null;
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254 return (Bean) selection.getFirstElement();
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255 }
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256
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257 private void initExtraBindings(DataBindingContext dbc) {
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258 final IObservableValue beanViewerSelection = ViewersObservables
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259 .observeSingleSelection(beanViewer);
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260 IObservableValue beanSelected = new ComputedValue(bool.TYPE) {
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261 protected Object calculate() {
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262 return bool.valueOf(beanViewerSelection.getValue() !is null);
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263 }
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264 };
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265 dbc.bindValue(SWTObservables.observeEnabled(addChildBeanButton),
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266 beanSelected);
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267 dbc.bindValue(SWTObservables.observeEnabled(removeBeanButton),
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268 beanSelected);
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269
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270 clipboard = new WritableValue();
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271 dbc.bindValue(SWTObservables.observeEnabled(copyButton), beanSelected);
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272 dbc.bindValue(SWTObservables.observeEnabled(pasteButton),
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273 new ComputedValue(bool.TYPE) {
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274 protected Object calculate() {
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275 return bool.valueOf(clipboard.getValue() !is null);
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276 }
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277 });
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278
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279 ViewerSupport.bind(beanViewer, input, BeanProperties.set("set",
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280 Bean.class), BeanProperties.value(Bean.class, "text"));
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281 }
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282
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283 static class Bean {
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284 /* package */PropertyChangeSupport changeSupport = new PropertyChangeSupport(
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285 this);
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286 private String text;
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287 private Set set;
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288
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289 public Bean(String text) {
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290 this.text = text;
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291 set = new HashSet();
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292 }
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293
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294 public void addPropertyChangeListener(PropertyChangeListener listener) {
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295 changeSupport.addPropertyChangeListener(listener);
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296 }
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297
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298 public void removePropertyChangeListener(PropertyChangeListener listener) {
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299 changeSupport.removePropertyChangeListener(listener);
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300 }
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301
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302 public String getText() {
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303 return text;
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304 }
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305
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306 public void setText(String value) {
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307 changeSupport.firePropertyChange("text", this.text,
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308 this.text = value);
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309 }
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310
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311 public Set getSet() {
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312 if (set is null)
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313 return null;
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314 return new HashSet(set);
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315 }
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316
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317 public void setSet(Set set) {
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318 if (set !is null)
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319 set = new HashSet(set);
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320 changeSupport.firePropertyChange("set", this.set, this.set = set);
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321 }
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322
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323 public bool hasListeners(String propertyName) {
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324 return changeSupport.hasListeners(propertyName);
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325 }
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326 }
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327 }
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328 void main( String[] args ){
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329 Snippet020TreeViewerWithSetFactory.main(args);
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330 }