annotate org.eclipse.jface/src/org/eclipse/jface/viewers/ComboBoxCellEditor.d @ 12:bc29606a740c

Added dwt-addons in original directory structure of eclipse.org
author Frank Benoit <benoit@tionex.de>
date Sat, 14 Mar 2009 18:23:29 +0100
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children 6f068362a363
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1 /*******************************************************************************
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2 * Copyright (c) 2000, 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 * Tom Schindl <tom.schindl@bestsolution.at> - bugfix in 174739
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11 * Port to the D programming language:
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12 * Frank Benoit <benoit@tionex.de>
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13 *******************************************************************************/
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14
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15 module org.eclipse.jface.viewers.ComboBoxCellEditor;
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16
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17 import org.eclipse.jface.viewers.CellEditor;
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18 import org.eclipse.jface.viewers.AbstractComboBoxCellEditor;
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19
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20 import org.eclipse.swt.SWT;
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21 import org.eclipse.swt.custom.CCombo;
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22 import org.eclipse.swt.events.FocusAdapter;
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23 import org.eclipse.swt.events.FocusEvent;
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24 import org.eclipse.swt.events.KeyAdapter;
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25 import org.eclipse.swt.events.KeyEvent;
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26 import org.eclipse.swt.events.SelectionAdapter;
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27 import org.eclipse.swt.events.SelectionEvent;
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28 import org.eclipse.swt.events.TraverseEvent;
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29 import org.eclipse.swt.events.TraverseListener;
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30 import org.eclipse.swt.graphics.GC;
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31 import org.eclipse.swt.widgets.Composite;
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32 import org.eclipse.swt.widgets.Control;
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33 import org.eclipse.core.runtime.Assert;
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34
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35 import java.lang.all;
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36 import java.util.Set;
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37 import tango.text.convert.Format;
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38
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39 /**
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40 * A cell editor that presents a list of items in a combo box. The cell editor's
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41 * value is the zero-based index of the selected item.
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42 * <p>
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43 * This class may be instantiated; it is not intended to be subclassed.
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44 * </p>
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45 * @noextend This class is not intended to be subclassed by clients.
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46 */
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47 public class ComboBoxCellEditor : AbstractComboBoxCellEditor {
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48
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49 /**
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50 * The list of items to present in the combo box.
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51 */
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52 private String[] items;
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53
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54 /**
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55 * The zero-based index of the selected item.
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56 */
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57 int selection;
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58
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59 /**
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60 * The custom combo box control.
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61 */
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62 CCombo comboBox;
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63
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64 /**
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65 * Default ComboBoxCellEditor style
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66 */
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67 private static const int defaultStyle = SWT.NONE;
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68
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69 /**
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70 * Creates a new cell editor with no control and no st of choices.
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71 * Initially, the cell editor has no cell validator.
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72 *
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73 * @since 2.1
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74 * @see CellEditor#setStyle
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75 * @see CellEditor#create
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76 * @see ComboBoxCellEditor#setItems
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77 * @see CellEditor#dispose
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78 */
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79 public this() {
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80 setStyle(defaultStyle);
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81 }
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82
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83 /**
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84 * Creates a new cell editor with a combo containing the given list of
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85 * choices and parented under the given control. The cell editor value is
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86 * the zero-based index of the selected item. Initially, the cell editor has
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87 * no cell validator and the first item in the list is selected.
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88 *
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89 * @param parent
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90 * the parent control
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91 * @param items
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92 * the list of strings for the combo box
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93 */
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94 public this(Composite parent, String[] items) {
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95 this(parent, items, defaultStyle);
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96 }
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97
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98 /**
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99 * Creates a new cell editor with a combo containing the given list of
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100 * choices and parented under the given control. The cell editor value is
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101 * the zero-based index of the selected item. Initially, the cell editor has
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102 * no cell validator and the first item in the list is selected.
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103 *
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104 * @param parent
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105 * the parent control
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106 * @param items
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107 * the list of strings for the combo box
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108 * @param style
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109 * the style bits
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110 * @since 2.1
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111 */
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112 public this(Composite parent, String[] items, int style) {
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113 super(parent, style);
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114 setItems(items);
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115 }
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116
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117 /**
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118 * Returns the list of choices for the combo box
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119 *
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120 * @return the list of choices for the combo box
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121 */
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122 public String[] getItems() {
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123 return this.items;
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124 }
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125
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126 /**
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127 * Sets the list of choices for the combo box
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128 *
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129 * @param items
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130 * the list of choices for the combo box
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131 */
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132 public void setItems(String[] items) {
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133 // Assert.isNotNull(items);
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134 this.items = items;
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135 populateComboBoxItems();
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136 }
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137
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138 /*
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139 * (non-Javadoc) Method declared on CellEditor.
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140 */
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141 protected override Control createControl(Composite parent) {
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142
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143 comboBox = new CCombo(parent, getStyle());
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144 comboBox.setFont(parent.getFont());
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145
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146 populateComboBoxItems();
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147
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148 comboBox.addKeyListener(new class KeyAdapter {
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149 // hook key pressed - see PR 14201
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150 public void keyPressed(KeyEvent e) {
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151 keyReleaseOccured(e);
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152 }
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153 });
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154
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155 comboBox.addSelectionListener(new class SelectionAdapter {
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156 public void widgetDefaultSelected(SelectionEvent event) {
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157 applyEditorValueAndDeactivate();
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158 }
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159
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160 public void widgetSelected(SelectionEvent event) {
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161 selection = comboBox.getSelectionIndex();
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162 }
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163 });
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164
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165 comboBox.addTraverseListener(new class TraverseListener {
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166 public void keyTraversed(TraverseEvent e) {
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167 if (e.detail is SWT.TRAVERSE_ESCAPE
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168 || e.detail is SWT.TRAVERSE_RETURN) {
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169 e.doit = false;
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170 }
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171 }
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172 });
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173
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174 comboBox.addFocusListener(new class FocusAdapter {
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175 public void focusLost(FocusEvent e) {
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176 this.outer.focusLost();
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177 }
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178 });
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179 return comboBox;
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180 }
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181
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182 /**
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183 * The <code>ComboBoxCellEditor</code> implementation of this
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184 * <code>CellEditor</code> framework method returns the zero-based index
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185 * of the current selection.
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186 *
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187 * @return the zero-based index of the current selection wrapped as an
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188 * <code>Integer</code>
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189 */
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190 protected override Object doGetValue() {
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191 return new ValueWrapperInt(selection);
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192 }
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193
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194 /*
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195 * (non-Javadoc) Method declared on CellEditor.
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196 */
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197 protected override void doSetFocus() {
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198 comboBox.setFocus();
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199 }
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200
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201 /**
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202 * The <code>ComboBoxCellEditor</code> implementation of this
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203 * <code>CellEditor</code> framework method sets the minimum width of the
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204 * cell. The minimum width is 10 characters if <code>comboBox</code> is
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205 * not <code>null</code> or <code>disposed</code> else it is 60 pixels
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206 * to make sure the arrow button and some text is visible. The list of
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207 * CCombo will be wide enough to show its longest item.
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208 */
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209 public override LayoutData getLayoutData() {
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210 LayoutData layoutData = super.getLayoutData();
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211 if ((comboBox is null) || comboBox.isDisposed()) {
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212 layoutData.minimumWidth = 60;
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213 } else {
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214 // make the comboBox 10 characters wide
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215 GC gc = new GC(comboBox);
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216 layoutData.minimumWidth = (gc.getFontMetrics()
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217 .getAverageCharWidth() * 10) + 10;
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218 gc.dispose();
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219 }
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220 return layoutData;
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221 }
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222
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223 /**
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224 * The <code>ComboBoxCellEditor</code> implementation of this
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225 * <code>CellEditor</code> framework method accepts a zero-based index of
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226 * a selection.
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227 *
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228 * @param value
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229 * the zero-based index of the selection wrapped as an
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230 * <code>Integer</code>
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231 */
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232 protected override void doSetValue(Object value) {
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233 Assert.isTrue(comboBox !is null && (cast(ValueWrapperInt)value ));
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234 selection = (cast(ValueWrapperInt) value).value;
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235 comboBox.select(selection);
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236 }
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237
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238 /**
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239 * Updates the list of choices for the combo box for the current control.
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240 */
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241 private void populateComboBoxItems() {
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242 if (comboBox !is null && items !is null) {
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243 comboBox.removeAll();
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244 for (int i = 0; i < items.length; i++) {
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245 comboBox.add(items[i], i);
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246 }
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247
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248 setValueValid(true);
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249 selection = 0;
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250 }
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251 }
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252
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253 /**
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254 * Applies the currently selected value and deactivates the cell editor
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255 */
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256 void applyEditorValueAndDeactivate() {
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257 // must set the selection before getting value
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258 selection = comboBox.getSelectionIndex();
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259 Object newValue = doGetValue();
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260 markDirty();
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261 bool isValid = isCorrect(newValue);
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262 setValueValid(isValid);
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263
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264 if (!isValid) {
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265 // Only format if the 'index' is valid
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266 if (items.length > 0 && selection >= 0 && selection < items.length) {
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267 // try to insert the current value into the error message.
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268 setErrorMessage(Format(getErrorMessage(),
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269 [ items[selection] ]));
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270 } else {
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271 // Since we don't have a valid index, assume we're using an
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272 // 'edit'
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273 // combo so format using its text value
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274 setErrorMessage(Format(getErrorMessage(),
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275 [ comboBox.getText() ]));
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276 }
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277 }
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278
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279 fireApplyEditorValue();
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280 deactivate();
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281 }
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282
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283 /*
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284 * (non-Javadoc)
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285 *
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286 * @see org.eclipse.jface.viewers.CellEditor#focusLost()
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287 */
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288 protected override void focusLost() {
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289 if (isActivated()) {
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290 applyEditorValueAndDeactivate();
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291 }
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292 }
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293
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294 /*
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295 * (non-Javadoc)
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296 *
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297 * @see org.eclipse.jface.viewers.CellEditor#keyReleaseOccured(org.eclipse.swt.events.KeyEvent)
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298 */
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299 protected override void keyReleaseOccured(KeyEvent keyEvent) {
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300 if (keyEvent.character is '\u001b') { // Escape character
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301 fireCancelEditor();
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302 } else if (keyEvent.character is '\t') { // tab key
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303 applyEditorValueAndDeactivate();
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304 }
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305 }
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306 }