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annotate org.eclipse.jface/src/org/eclipse/jface/viewers/ComboBoxCellEditor.d @ 17:6f068362a363

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Remove direct import of tango.text.convert.Format
author Frank Benoit <benoit@tionex.de>
date Wed, 18 Mar 2009 09:09:23 +0100
parents bc29606a740c
children 12b890a6392a
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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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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
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38 /**
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39 * A cell editor that presents a list of items in a combo box. The cell editor's
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40 * value is the zero-based index of the selected item.
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41 * <p>
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42 * This class may be instantiated; it is not intended to be subclassed.
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43 * </p>
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44 * @noextend This class is not intended to be subclassed by clients.
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45 */
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46 public class ComboBoxCellEditor : AbstractComboBoxCellEditor {
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47
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48 /**
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49 * The list of items to present in the combo box.
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50 */
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51 private String[] items;
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52
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53 /**
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54 * The zero-based index of the selected item.
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55 */
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56 int selection;
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57
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58 /**
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59 * The custom combo box control.
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60 */
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61 CCombo comboBox;
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62
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63 /**
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64 * Default ComboBoxCellEditor style
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65 */
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66 private static const int defaultStyle = SWT.NONE;
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67
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68 /**
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69 * Creates a new cell editor with no control and no st of choices.
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70 * Initially, the cell editor has no cell validator.
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71 *
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72 * @since 2.1
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73 * @see CellEditor#setStyle
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74 * @see CellEditor#create
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75 * @see ComboBoxCellEditor#setItems
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76 * @see CellEditor#dispose
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77 */
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78 public this() {
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79 setStyle(defaultStyle);
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80 }
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81
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82 /**
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83 * Creates a new cell editor with a combo containing the given list of
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84 * choices and parented under the given control. The cell editor value is
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85 * the zero-based index of the selected item. Initially, the cell editor has
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86 * no cell validator and the first item in the list is selected.
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87 *
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88 * @param parent
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89 * the parent control
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90 * @param items
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91 * the list of strings for the combo box
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92 */
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93 public this(Composite parent, String[] items) {
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94 this(parent, items, defaultStyle);
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95 }
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96
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97 /**
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98 * Creates a new cell editor with a combo containing the given list of
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99 * choices and parented under the given control. The cell editor value is
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100 * the zero-based index of the selected item. Initially, the cell editor has
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101 * no cell validator and the first item in the list is selected.
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102 *
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103 * @param parent
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104 * the parent control
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105 * @param items
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106 * the list of strings for the combo box
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107 * @param style
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108 * the style bits
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109 * @since 2.1
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110 */
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111 public this(Composite parent, String[] items, int style) {
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112 super(parent, style);
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113 setItems(items);
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114 }
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115
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116 /**
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117 * Returns the list of choices for the combo box
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118 *
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119 * @return the list of choices for the combo box
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120 */
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121 public String[] getItems() {
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122 return this.items;
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123 }
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124
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125 /**
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126 * Sets the list of choices for the combo box
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127 *
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128 * @param items
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129 * the list of choices for the combo box
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130 */
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131 public void setItems(String[] items) {
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132 // Assert.isNotNull(items);
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133 this.items = items;
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134 populateComboBoxItems();
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135 }
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136
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137 /*
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138 * (non-Javadoc) Method declared on CellEditor.
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139 */
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140 protected override Control createControl(Composite parent) {
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141
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142 comboBox = new CCombo(parent, getStyle());
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143 comboBox.setFont(parent.getFont());
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144
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145 populateComboBoxItems();
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146
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147 comboBox.addKeyListener(new class KeyAdapter {
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148 // hook key pressed - see PR 14201
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149 public void keyPressed(KeyEvent e) {
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150 keyReleaseOccured(e);
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151 }
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152 });
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153
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154 comboBox.addSelectionListener(new class SelectionAdapter {
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155 public void widgetDefaultSelected(SelectionEvent event) {
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156 applyEditorValueAndDeactivate();
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157 }
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158
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159 public void widgetSelected(SelectionEvent event) {
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160 selection = comboBox.getSelectionIndex();
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161 }
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162 });
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163
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164 comboBox.addTraverseListener(new class TraverseListener {
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165 public void keyTraversed(TraverseEvent e) {
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166 if (e.detail is SWT.TRAVERSE_ESCAPE
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167 || e.detail is SWT.TRAVERSE_RETURN) {
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168 e.doit = false;
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169 }
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170 }
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171 });
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172
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173 comboBox.addFocusListener(new class FocusAdapter {
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174 public void focusLost(FocusEvent e) {
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175 this.outer.focusLost();
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176 }
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177 });
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178 return comboBox;
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179 }
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180
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181 /**
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182 * The <code>ComboBoxCellEditor</code> implementation of this
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183 * <code>CellEditor</code> framework method returns the zero-based index
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184 * of the current selection.
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185 *
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186 * @return the zero-based index of the current selection wrapped as an
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187 * <code>Integer</code>
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188 */
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189 protected override Object doGetValue() {
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190 return new ValueWrapperInt(selection);
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191 }
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192
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193 /*
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194 * (non-Javadoc) Method declared on CellEditor.
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195 */
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196 protected override void doSetFocus() {
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197 comboBox.setFocus();
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198 }
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199
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200 /**
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201 * The <code>ComboBoxCellEditor</code> implementation of this
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202 * <code>CellEditor</code> framework method sets the minimum width of the
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203 * cell. The minimum width is 10 characters if <code>comboBox</code> is
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204 * not <code>null</code> or <code>disposed</code> else it is 60 pixels
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205 * to make sure the arrow button and some text is visible. The list of
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206 * CCombo will be wide enough to show its longest item.
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207 */
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208 public override LayoutData getLayoutData() {
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209 LayoutData layoutData = super.getLayoutData();
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210 if ((comboBox is null) || comboBox.isDisposed()) {
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211 layoutData.minimumWidth = 60;
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212 } else {
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213 // make the comboBox 10 characters wide
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214 GC gc = new GC(comboBox);
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215 layoutData.minimumWidth = (gc.getFontMetrics()
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216 .getAverageCharWidth() * 10) + 10;
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217 gc.dispose();
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218 }
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219 return layoutData;
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220 }
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221
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222 /**
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223 * The <code>ComboBoxCellEditor</code> implementation of this
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224 * <code>CellEditor</code> framework method accepts a zero-based index of
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225 * a selection.
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226 *
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227 * @param value
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228 * the zero-based index of the selection wrapped as an
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229 * <code>Integer</code>
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230 */
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231 protected override void doSetValue(Object value) {
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232 Assert.isTrue(comboBox !is null && (cast(ValueWrapperInt)value ));
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233 selection = (cast(ValueWrapperInt) value).value;
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234 comboBox.select(selection);
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235 }
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236
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237 /**
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238 * Updates the list of choices for the combo box for the current control.
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239 */
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240 private void populateComboBoxItems() {
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241 if (comboBox !is null && items !is null) {
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242 comboBox.removeAll();
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243 for (int i = 0; i < items.length; i++) {
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244 comboBox.add(items[i], i);
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245 }
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246
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247 setValueValid(true);
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248 selection = 0;
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249 }
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250 }
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251
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252 /**
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253 * Applies the currently selected value and deactivates the cell editor
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254 */
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255 void applyEditorValueAndDeactivate() {
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256 // must set the selection before getting value
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257 selection = comboBox.getSelectionIndex();
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258 Object newValue = doGetValue();
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259 markDirty();
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260 bool isValid = isCorrect(newValue);
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261 setValueValid(isValid);
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262
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263 if (!isValid) {
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264 // Only format if the 'index' is valid
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265 if (items.length > 0 && selection >= 0 && selection < items.length) {
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266 // try to insert the current value into the error message.
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267 setErrorMessage(Format(getErrorMessage(),
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268 [ items[selection] ]));
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269 } else {
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270 // Since we don't have a valid index, assume we're using an
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271 // 'edit'
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272 // combo so format using its text value
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273 setErrorMessage(Format(getErrorMessage(),
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274 [ comboBox.getText() ]));
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275 }
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276 }
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277
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278 fireApplyEditorValue();
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279 deactivate();
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280 }
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281
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282 /*
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283 * (non-Javadoc)
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284 *
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285 * @see org.eclipse.jface.viewers.CellEditor#focusLost()
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286 */
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287 protected override void focusLost() {
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288 if (isActivated()) {
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289 applyEditorValueAndDeactivate();
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290 }
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291 }
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292
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293 /*
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294 * (non-Javadoc)
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295 *
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296 * @see org.eclipse.jface.viewers.CellEditor#keyReleaseOccured(org.eclipse.swt.events.KeyEvent)
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297 */
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298 protected override void keyReleaseOccured(KeyEvent keyEvent) {
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299 if (keyEvent.character is '\u001b') { // Escape character
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300 fireCancelEditor();
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301 } else if (keyEvent.character is '\t') { // tab key
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302 applyEditorValueAndDeactivate();
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303 }
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304 }
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305 }