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annotate org.eclipse.jface/src/org/eclipse/jface/viewers/DialogCellEditor.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
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children
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1 /*******************************************************************************
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2 * Copyright (c) 2000, 2007 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 * Port to the D programming language:
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11 * Frank Benoit <benoit@tionex.de>
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12 *******************************************************************************/
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13 module org.eclipse.jface.viewers.DialogCellEditor;
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15 import org.eclipse.jface.viewers.CellEditor;
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16
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17 import org.eclipse.swt.SWT;
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18 import org.eclipse.swt.events.FocusEvent;
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19 import org.eclipse.swt.events.FocusListener;
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20 import org.eclipse.swt.events.KeyAdapter;
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21 import org.eclipse.swt.events.KeyEvent;
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22 import org.eclipse.swt.events.SelectionAdapter;
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23 import org.eclipse.swt.events.SelectionEvent;
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24 import org.eclipse.swt.graphics.Color;
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25 import org.eclipse.swt.graphics.Font;
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26 import org.eclipse.swt.graphics.Point;
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27 import org.eclipse.swt.graphics.Rectangle;
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28 import org.eclipse.swt.widgets.Button;
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29 import org.eclipse.swt.widgets.Composite;
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30 import org.eclipse.swt.widgets.Control;
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31 import org.eclipse.swt.widgets.Label;
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32 import org.eclipse.swt.widgets.Layout;
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33 import org.eclipse.jface.resource.ImageDescriptor;
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34 import org.eclipse.jface.resource.ImageRegistry;
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35 import org.eclipse.jface.resource.JFaceResources;
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36
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37 import java.lang.all;
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38 import java.util.Set;
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39
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40 /**
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41 * An abstract cell editor that uses a dialog.
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42 * Dialog cell editors usually have a label control on the left and a button on
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43 * the right. Pressing the button opens a dialog window (for example, a color dialog
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44 * or a file dialog) to change the cell editor's value.
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45 * The cell editor's value is the value of the dialog.
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46 * <p>
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47 * Subclasses may override the following methods:
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48 * <ul>
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49 * <li><code>createButton</code>: creates the cell editor's button control</li>
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50 * <li><code>createContents</code>: creates the cell editor's 'display value' control</li>
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51 * <li><code>updateContents</code>: updates the cell editor's 'display value' control
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52 * after its value has changed</li>
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53 * <li><code>openDialogBox</code>: opens the dialog box when the end user presses
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54 * the button</li>
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55 * </ul>
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56 * </p>
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57 */
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58 public abstract class DialogCellEditor : CellEditor {
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59
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60 /**
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61 * Image registry key for three dot image (value <code>"cell_editor_dots_button_image"</code>).
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62 */
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63 public static const String CELL_EDITOR_IMG_DOTS_BUTTON = "cell_editor_dots_button_image";//$NON-NLS-1$
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64
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65 /**
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66 * The editor control.
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67 */
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68 private Composite editor;
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69
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70 /**
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71 * The current contents.
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72 */
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73 private Control contents;
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74
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75 /**
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76 * The label that gets reused by <code>updateLabel</code>.
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77 */
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78 private Label defaultLabel;
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79
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80 /**
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81 * The button.
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82 */
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83 private Button button;
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84
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85 /**
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86 * Listens for 'focusLost' events and fires the 'apply' event as long
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87 * as the focus wasn't lost because the dialog was opened.
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88 */
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89 private FocusListener buttonFocusListener;
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90
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91 /**
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92 * The value of this cell editor; initially <code>null</code>.
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93 */
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94 private Object value = null;
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95
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96 static this() {
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97 ImageRegistry reg = JFaceResources.getImageRegistry();
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98 reg.put(CELL_EDITOR_IMG_DOTS_BUTTON, ImageDescriptor.createFromFile(
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99 getImportData!("org.eclipse.jface.images.dots_button.gif")));//$NON-NLS-1$
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100 }
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101
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102 /**
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103 * Internal class for laying out the dialog.
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104 */
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105 private class DialogCellLayout : Layout {
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106 public override void layout(Composite editor, bool force) {
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107 Rectangle bounds = editor.getClientArea();
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108 Point size = button.computeSize(SWT.DEFAULT, SWT.DEFAULT, force);
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109 if (contents !is null) {
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110 contents.setBounds(0, 0, bounds.width - size.x, bounds.height);
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111 }
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112 button.setBounds(bounds.width - size.x, 0, size.x, bounds.height);
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113 }
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114
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115 public override Point computeSize(Composite editor, int wHint, int hHint,
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116 bool force) {
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117 if (wHint !is SWT.DEFAULT && hHint !is SWT.DEFAULT) {
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118 return new Point(wHint, hHint);
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119 }
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120 Point contentsSize = contents.computeSize(SWT.DEFAULT, SWT.DEFAULT,
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121 force);
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122 Point buttonSize = button.computeSize(SWT.DEFAULT, SWT.DEFAULT,
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123 force);
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124 // Just return the button width to ensure the button is not clipped
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125 // if the label is long.
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126 // The label will just use whatever extra width there is
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127 Point result = new Point(buttonSize.x, Math.max(contentsSize.y,
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128 buttonSize.y));
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129 return result;
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130 }
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131 }
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132
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133 /**
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134 * Default DialogCellEditor style
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135 */
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136 private static const int defaultStyle = SWT.NONE;
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137
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138 /**
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139 * Creates a new dialog cell editor with no control
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140 * @since 2.1
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141 */
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142 public this() {
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143 setStyle(defaultStyle);
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144 }
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145
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146 /**
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147 * Creates a new dialog cell editor parented under the given control.
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148 * The cell editor value is <code>null</code> initially, and has no
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149 * validator.
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150 *
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151 * @param parent the parent control
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152 */
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153 protected this(Composite parent) {
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154 this(parent, defaultStyle);
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155 }
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156
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157 /**
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158 * Creates a new dialog cell editor parented under the given control.
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159 * The cell editor value is <code>null</code> initially, and has no
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160 * validator.
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161 *
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162 * @param parent the parent control
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163 * @param style the style bits
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164 * @since 2.1
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165 */
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166 protected this(Composite parent, int style) {
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167 super(parent, style);
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168 }
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169
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170 /**
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171 * Creates the button for this cell editor under the given parent control.
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172 * <p>
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173 * The default implementation of this framework method creates the button
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174 * display on the right hand side of the dialog cell editor. Subclasses
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175 * may extend or reimplement.
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176 * </p>
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177 *
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178 * @param parent the parent control
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179 * @return the new button control
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180 */
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181 protected Button createButton(Composite parent) {
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182 Button result = new Button(parent, SWT.DOWN);
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183 result.setText("..."); //$NON-NLS-1$
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184 return result;
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185 }
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186
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187 /**
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188 * Creates the controls used to show the value of this cell editor.
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189 * <p>
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190 * The default implementation of this framework method creates
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191 * a label widget, using the same font and background color as the parent control.
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192 * </p>
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193 * <p>
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194 * Subclasses may reimplement. If you reimplement this method, you
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195 * should also reimplement <code>updateContents</code>.
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196 * </p>
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197 *
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198 * @param cell the control for this cell editor
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199 * @return the underlying control
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200 */
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201 protected Control createContents(Composite cell) {
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202 defaultLabel = new Label(cell, SWT.LEFT);
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203 defaultLabel.setFont(cell.getFont());
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204 defaultLabel.setBackground(cell.getBackground());
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205 return defaultLabel;
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206 }
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207
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208 /* (non-Javadoc)
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209 * Method declared on CellEditor.
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210 */
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211 protected override Control createControl(Composite parent) {
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212
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213 Font font = parent.getFont();
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214 Color bg = parent.getBackground();
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215
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216 editor = new Composite(parent, getStyle());
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217 editor.setFont(font);
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218 editor.setBackground(bg);
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219 editor.setLayout(new DialogCellLayout());
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220
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221 contents = createContents(editor);
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222 updateContents(value);
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223
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224 button = createButton(editor);
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225 button.setFont(font);
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226
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227 button.addKeyListener(new class KeyAdapter {
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228 /* (non-Javadoc)
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229 * @see org.eclipse.swt.events.KeyListener#keyReleased(org.eclipse.swt.events.KeyEvent)
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230 */
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231 public void keyReleased(KeyEvent e) {
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232 if (e.character is '\u001b') { // Escape
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233 fireCancelEditor();
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234 }
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235 }
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236 });
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237
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238 button.addFocusListener(getButtonFocusListener());
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239
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240 button.addSelectionListener(new class SelectionAdapter {
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241 /* (non-Javadoc)
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242 * @see org.eclipse.swt.events.SelectionListener#widgetSelected(org.eclipse.swt.events.SelectionEvent)
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243 */
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244 public void widgetSelected(SelectionEvent event) {
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245 // Remove the button's focus listener since it's guaranteed
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246 // to lose focus when the dialog opens
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247 button.removeFocusListener(getButtonFocusListener());
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248
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249 Object newValue = openDialogBox(editor);
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250
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251 // Re-add the listener once the dialog closes
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252 button.addFocusListener(getButtonFocusListener());
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253
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254 if (newValue !is null) {
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255 bool newValidState = isCorrect(newValue);
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256 if (newValidState) {
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257 markDirty();
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258 doSetValue(newValue);
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259 } else {
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260 // try to insert the current value into the error message.
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261 setErrorMessage(Format(getErrorMessage(),
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262 newValue.toString() ));
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263 }
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264 fireApplyEditorValue();
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265 }
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266 }
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267 });
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268
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269 setValueValid(true);
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270
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271 return editor;
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272 }
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273
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274 /* (non-Javadoc)
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275 *
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276 * Override in order to remove the button's focus listener if the celleditor
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277 * is deactivating.
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278 *
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279 * @see org.eclipse.jface.viewers.CellEditor#deactivate()
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280 */
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281 public override void deactivate() {
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282 if (button !is null && !button.isDisposed()) {
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283 button.removeFocusListener(getButtonFocusListener());
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284 }
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285
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286 super.deactivate();
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287 }
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288
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289 /* (non-Javadoc)
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290 * Method declared on CellEditor.
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291 */
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292 protected override Object doGetValue() {
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293 return value;
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294 }
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295
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296 /* (non-Javadoc)
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297 * Method declared on CellEditor.
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298 * The focus is set to the cell editor's button.
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299 */
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300 protected override void doSetFocus() {
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301 button.setFocus();
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302
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303 // add a FocusListener to the button
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304 button.addFocusListener(getButtonFocusListener());
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305 }
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306
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307 /**
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308 * Return a listener for button focus.
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309 * @return FocusListener
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310 */
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311 private FocusListener getButtonFocusListener() {
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312 if (buttonFocusListener is null) {
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313 buttonFocusListener = new class FocusListener {
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314
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315 /* (non-Javadoc)
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316 * @see org.eclipse.swt.events.FocusListener#focusGained(org.eclipse.swt.events.FocusEvent)
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317 */
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318 public void focusGained(FocusEvent e) {
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319 // Do nothing
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320 }
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321
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322 /* (non-Javadoc)
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323 * @see org.eclipse.swt.events.FocusListener#focusLost(org.eclipse.swt.events.FocusEvent)
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324 */
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325 public void focusLost(FocusEvent e) {
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326 this.outer.focusLost();
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327 }
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328 };
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329 }
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330
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331 return buttonFocusListener;
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332 }
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333
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334 /* (non-Javadoc)
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335 * Method declared on CellEditor.
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336 */
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337 protected override void doSetValue(Object value) {
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338 this.value = value;
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339 updateContents(value);
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340 }
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341
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342 /**
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343 * Returns the default label widget created by <code>createContents</code>.
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344 *
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345 * @return the default label widget
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346 */
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347 protected Label getDefaultLabel() {
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348 return defaultLabel;
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349 }
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350
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351 /**
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352 * Opens a dialog box under the given parent control and returns the
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353 * dialog's value when it closes, or <code>null</code> if the dialog
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354 * was canceled or no selection was made in the dialog.
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355 * <p>
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356 * This framework method must be implemented by concrete subclasses.
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357 * It is called when the user has pressed the button and the dialog
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358 * box must pop up.
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359 * </p>
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360 *
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361 * @param cellEditorWindow the parent control cell editor's window
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362 * so that a subclass can adjust the dialog box accordingly
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363 * @return the selected value, or <code>null</code> if the dialog was
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364 * canceled or no selection was made in the dialog
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365 */
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366 protected abstract Object openDialogBox(Control cellEditorWindow);
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367
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368 /**
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369 * Updates the controls showing the value of this cell editor.
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370 * <p>
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371 * The default implementation of this framework method just converts
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372 * the passed object to a string using <code>toString</code> and
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373 * sets this as the text of the label widget.
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374 * </p>
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375 * <p>
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376 * Subclasses may reimplement. If you reimplement this method, you
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377 * should also reimplement <code>createContents</code>.
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378 * </p>
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379 *
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380 * @param value the new value of this cell editor
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381 */
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382 protected void updateContents(Object value) {
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383 if (defaultLabel is null) {
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384 return;
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385 }
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386
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387 String text = "";//$NON-NLS-1$
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388 if (value !is null) {
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389 text = value.toString();
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390 }
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391 defaultLabel.setText(text);
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392 }
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393 }