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annotate org.eclipse.jface.examples.databinding/src/org/eclipse/jface/examples/databinding/snippets/Snippet020TreeViewerWithSetFactory.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
parents
children 5d5bd660917f
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90
6086085e153d Added databinding snippets. unmodified java sources.
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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 package org.eclipse.jface.examples.databinding.snippets;
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13
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14 import java.beans.PropertyChangeListener;
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15 import java.beans.PropertyChangeSupport;
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16 import java.util.HashSet;
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17 import java.util.Set;
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18
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19 import org.eclipse.core.databinding.DataBindingContext;
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20 import org.eclipse.core.databinding.beans.BeanProperties;
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21 import org.eclipse.core.databinding.beans.BeansObservables;
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22 import org.eclipse.core.databinding.observable.Realm;
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23 import org.eclipse.core.databinding.observable.value.ComputedValue;
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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.jface.databinding.swt.SWTObservables;
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27 import org.eclipse.jface.databinding.viewers.ViewerSupport;
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28 import org.eclipse.jface.databinding.viewers.ViewersObservables;
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29 import org.eclipse.jface.viewers.IStructuredSelection;
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30 import org.eclipse.jface.viewers.StructuredSelection;
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31 import org.eclipse.jface.viewers.TreeViewer;
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32 import org.eclipse.jface.viewers.ViewerComparator;
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33 import org.eclipse.swt.SWT;
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34 import org.eclipse.swt.events.SelectionAdapter;
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35 import org.eclipse.swt.events.SelectionEvent;
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36 import org.eclipse.swt.layout.GridData;
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37 import org.eclipse.swt.layout.GridLayout;
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38 import org.eclipse.swt.layout.RowLayout;
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39 import org.eclipse.swt.widgets.Button;
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40 import org.eclipse.swt.widgets.Composite;
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41 import org.eclipse.swt.widgets.Display;
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42 import org.eclipse.swt.widgets.Label;
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43 import org.eclipse.swt.widgets.Shell;
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44 import org.eclipse.swt.widgets.Text;
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45 import org.eclipse.swt.widgets.Tree;
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46 import org.eclipse.swt.widgets.TreeItem;
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47
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48 public class Snippet020TreeViewerWithSetFactory {
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49
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50 private Button pasteButton;
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51 private Button copyButton;
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52 private Shell shell;
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53 private Button addChildBeanButton;
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54 private Button removeBeanButton;
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55 private TreeViewer beanViewer;
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56 private Tree tree;
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57 private Text beanText;
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58 private DataBindingContext m_bindingContext;
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59
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60 private Bean input = createBean("input");
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61 private IObservableValue clipboard;
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62 static int counter = 0;
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63
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64 /**
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65 * Launch the application
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66 *
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67 * @param args
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68 */
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69 public static void main(String[] args) {
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70 Display display = Display.getDefault();
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71 Realm.runWithDefault(SWTObservables.getRealm(display), new Runnable() {
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72 public void run() {
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73 try {
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74 Snippet020TreeViewerWithSetFactory window = new Snippet020TreeViewerWithSetFactory();
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75 window.open();
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76 } catch (Exception e) {
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77 e.printStackTrace();
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78 }
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79 }
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80 });
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81 }
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82
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83 /**
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84 * Open the window
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85 */
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86 public void open() {
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87 final Display display = Display.getDefault();
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88 createContents();
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89 shell.open();
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90 shell.layout();
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91 while (!shell.isDisposed()) {
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92 if (!display.readAndDispatch())
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93 display.sleep();
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94 }
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95 }
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96
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97 /**
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98 * Create contents of the window
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99 */
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100 protected void createContents() {
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101 shell = new Shell();
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102 final GridLayout gridLayout_1 = new GridLayout();
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103 gridLayout_1.numColumns = 2;
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104 shell.setLayout(gridLayout_1);
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105 shell.setSize(535, 397);
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106 shell.setText("SWT Application");
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107
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108 final Composite group = new Composite(shell, SWT.NONE);
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109 final RowLayout rowLayout = new RowLayout();
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110 rowLayout.marginTop = 0;
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111 rowLayout.marginRight = 0;
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112 rowLayout.marginLeft = 0;
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113 rowLayout.marginBottom = 0;
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114 rowLayout.pack = false;
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115 group.setLayout(rowLayout);
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116 group
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117 .setLayoutData(new GridData(SWT.FILL, SWT.FILL, false, false,
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118 2, 1));
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119
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120 final Button addRootButton = new Button(group, SWT.NONE);
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121 addRootButton.addSelectionListener(new SelectionAdapter() {
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122 public void widgetSelected(final SelectionEvent e) {
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123 Set set = input.getSet();
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124 Bean root = createBean("root");
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125 set.add(root);
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126 input.setSet(set);
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127
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128 beanViewer.setSelection(new StructuredSelection(root));
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129 beanText.selectAll();
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130 beanText.setFocus();
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131 }
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132 });
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133 addRootButton.setText("Add Root");
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134
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135 addChildBeanButton = new Button(group, SWT.NONE);
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136 addChildBeanButton.addSelectionListener(new SelectionAdapter() {
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137 public void widgetSelected(final SelectionEvent e) {
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138 Bean parent = getSelectedBean();
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139 Set set = new HashSet(parent.getSet());
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140 Bean child = createBean("child" + (counter++));
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141 set.add(child);
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142 parent.setSet(set);
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143
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144 // beanViewer.setSelection(new StructuredSelection(parent));
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145 // beanText.selectAll();
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146 // beanText.setFocus();
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147 }
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148 });
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149 addChildBeanButton.setText("Add Child");
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150
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151 removeBeanButton = new Button(group, SWT.NONE);
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152 removeBeanButton.addSelectionListener(new SelectionAdapter() {
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153 public void widgetSelected(final SelectionEvent e) {
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154 TreeItem selectedItem = beanViewer.getTree().getSelection()[0];
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155 Bean bean = (Bean) selectedItem.getData();
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156 TreeItem parentItem = selectedItem.getParentItem();
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157 Bean parent;
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158 if (parentItem == null)
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159 parent = input;
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160 else
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161 parent = (Bean) parentItem.getData();
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162
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163 Set set = new HashSet(parent.getSet());
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164 set.remove(bean);
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165 parent.setSet(set);
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166 }
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167 });
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168 removeBeanButton.setText("Remove");
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169
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170 copyButton = new Button(group, SWT.NONE);
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171 copyButton.addSelectionListener(new SelectionAdapter() {
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172 public void widgetSelected(final SelectionEvent e) {
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173 clipboard.setValue(getSelectedBean());
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174 }
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175 });
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176 copyButton.setText("Copy");
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177
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178 pasteButton = new Button(group, SWT.NONE);
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179 pasteButton.addSelectionListener(new SelectionAdapter() {
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180 public void widgetSelected(final SelectionEvent e) {
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181 Bean copy = (Bean) clipboard.getValue();
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182 if (copy == null)
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183 return;
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184 Bean parent = getSelectedBean();
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185 if (parent == null)
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186 parent = input;
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187
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188 Set set = new HashSet(parent.getSet());
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189 set.add(copy);
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190 parent.setSet(set);
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191
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192 beanViewer.setSelection(new StructuredSelection(copy));
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193 beanText.selectAll();
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194 beanText.setFocus();
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195 }
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196 });
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197 pasteButton.setText("Paste");
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198
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199 final Button refreshButton = new Button(group, SWT.NONE);
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200 refreshButton.addSelectionListener(new SelectionAdapter() {
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201 public void widgetSelected(final SelectionEvent e) {
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202 beanViewer.refresh();
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203 }
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204 });
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205 refreshButton.setText("Refresh");
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206
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207 beanViewer = new TreeViewer(shell, SWT.FULL_SELECTION | SWT.BORDER);
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208 beanViewer.setUseHashlookup(true);
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209 beanViewer.setComparator(new ViewerComparator());
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210 tree = beanViewer.getTree();
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211 tree.setLayoutData(new GridData(SWT.FILL, SWT.FILL, true, true, 2, 1));
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212
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213 final Label itemNameLabel = new Label(shell, SWT.NONE);
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214 itemNameLabel.setText("Item Name");
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215
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216 beanText = new Text(shell, SWT.BORDER);
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217 final GridData gd_beanValue = new GridData(SWT.FILL, SWT.CENTER, true,
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218 false);
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219 beanText.setLayoutData(gd_beanValue);
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220 m_bindingContext = initDataBindings();
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221 //
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222 initExtraBindings(m_bindingContext);
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223 }
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224
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225 private static Bean createBean(String name) {
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226 return new Bean(name);
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227 }
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228
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229 protected DataBindingContext initDataBindings() {
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230 IObservableValue treeViewerSelectionObserveSelection = ViewersObservables
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231 .observeSingleSelection(beanViewer);
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232 IObservableValue textTextObserveWidget = SWTObservables.observeText(
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233 beanText, SWT.Modify);
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234 IObservableValue treeViewerValueObserveDetailValue = BeansObservables
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235 .observeDetailValue(treeViewerSelectionObserveSelection,
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236 "text", String.class);
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237 //
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238 //
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239 DataBindingContext bindingContext = new DataBindingContext();
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240 //
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241 bindingContext.bindValue(textTextObserveWidget,
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242 treeViewerValueObserveDetailValue);
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243 //
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244 return bindingContext;
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245 }
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246
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247 private Bean getSelectedBean() {
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248 IStructuredSelection selection = (IStructuredSelection) beanViewer
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249 .getSelection();
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250 if (selection.isEmpty())
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251 return null;
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252 return (Bean) selection.getFirstElement();
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253 }
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254
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255 private void initExtraBindings(DataBindingContext dbc) {
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256 final IObservableValue beanViewerSelection = ViewersObservables
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257 .observeSingleSelection(beanViewer);
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258 IObservableValue beanSelected = new ComputedValue(Boolean.TYPE) {
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diff changeset
259 protected Object calculate() {
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260 return Boolean.valueOf(beanViewerSelection.getValue() != null);
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diff changeset
261 }
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parents:
diff changeset
262 };
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parents:
diff changeset
263 dbc.bindValue(SWTObservables.observeEnabled(addChildBeanButton),
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diff changeset
264 beanSelected);
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parents:
diff changeset
265 dbc.bindValue(SWTObservables.observeEnabled(removeBeanButton),
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diff changeset
266 beanSelected);
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diff changeset
267
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diff changeset
268 clipboard = new WritableValue();
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269 dbc.bindValue(SWTObservables.observeEnabled(copyButton), beanSelected);
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270 dbc.bindValue(SWTObservables.observeEnabled(pasteButton),
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parents:
diff changeset
271 new ComputedValue(Boolean.TYPE) {
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diff changeset
272 protected Object calculate() {
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273 return Boolean.valueOf(clipboard.getValue() != null);
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parents:
diff changeset
274 }
6086085e153d Added databinding snippets. unmodified java sources.
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parents:
diff changeset
275 });
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276
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diff changeset
277 ViewerSupport.bind(beanViewer, input, BeanProperties.set("set",
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diff changeset
278 Bean.class), BeanProperties.value(Bean.class, "text"));
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diff changeset
279 }
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280
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diff changeset
281 static class Bean {
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282 /* package */PropertyChangeSupport changeSupport = new PropertyChangeSupport(
6086085e153d Added databinding snippets. unmodified java sources.
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diff changeset
283 this);
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284 private String text;
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diff changeset
285 private Set set;
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286
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287 public Bean(String text) {
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288 this.text = text;
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289 set = new HashSet();
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290 }
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291
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292 public void addPropertyChangeListener(PropertyChangeListener listener) {
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diff changeset
293 changeSupport.addPropertyChangeListener(listener);
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diff changeset
294 }
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295
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296 public void removePropertyChangeListener(PropertyChangeListener listener) {
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297 changeSupport.removePropertyChangeListener(listener);
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298 }
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299
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300 public String getText() {
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301 return text;
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302 }
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303
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304 public void setText(String value) {
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305 changeSupport.firePropertyChange("text", this.text,
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306 this.text = value);
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307 }
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308
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309 public Set getSet() {
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310 if (set == null)
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311 return null;
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312 return new HashSet(set);
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313 }
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314
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315 public void setSet(Set set) {
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316 if (set != null)
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317 set = new HashSet(set);
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318 changeSupport.firePropertyChange("set", this.set, this.set = set);
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319 }
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320
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321 public boolean hasListeners(String propertyName) {
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322 return changeSupport.hasListeners(propertyName);
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323 }
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324 }
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325 }