Mercurial > projects > dwt2
annotate org.eclipse.jface/src/org/eclipse/jface/viewers/DialogCellEditor.d @ 12:bc29606a740c
Added dwt-addons in original directory structure of eclipse.org
author | Frank Benoit <benoit@tionex.de> |
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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, 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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14 |
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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 import tango.text.convert.Format; |
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40 |
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41 /** |
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42 * An abstract cell editor that uses a dialog. |
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43 * Dialog cell editors usually have a label control on the left and a button on |
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44 * the right. Pressing the button opens a dialog window (for example, a color dialog |
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45 * or a file dialog) to change the cell editor's value. |
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46 * The cell editor's value is the value of the dialog. |
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47 * <p> |
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48 * Subclasses may override the following methods: |
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49 * <ul> |
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50 * <li><code>createButton</code>: creates the cell editor's button control</li> |
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51 * <li><code>createContents</code>: creates the cell editor's 'display value' control</li> |
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52 * <li><code>updateContents</code>: updates the cell editor's 'display value' control |
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53 * after its value has changed</li> |
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54 * <li><code>openDialogBox</code>: opens the dialog box when the end user presses |
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55 * the button</li> |
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56 * </ul> |
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57 * </p> |
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58 */ |
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59 public abstract class DialogCellEditor : CellEditor { |
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60 |
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61 /** |
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62 * Image registry key for three dot image (value <code>"cell_editor_dots_button_image"</code>). |
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63 */ |
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64 public static const String CELL_EDITOR_IMG_DOTS_BUTTON = "cell_editor_dots_button_image";//$NON-NLS-1$ |
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65 |
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66 /** |
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67 * The editor control. |
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68 */ |
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69 private Composite editor; |
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70 |
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71 /** |
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72 * The current contents. |
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73 */ |
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74 private Control contents; |
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75 |
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76 /** |
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77 * The label that gets reused by <code>updateLabel</code>. |
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78 */ |
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79 private Label defaultLabel; |
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80 |
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81 /** |
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82 * The button. |
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83 */ |
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84 private Button button; |
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85 |
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86 /** |
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87 * Listens for 'focusLost' events and fires the 'apply' event as long |
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88 * as the focus wasn't lost because the dialog was opened. |
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89 */ |
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90 private FocusListener buttonFocusListener; |
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91 |
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92 /** |
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93 * The value of this cell editor; initially <code>null</code>. |
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94 */ |
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95 private Object value = null; |
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96 |
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97 static this() { |
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98 ImageRegistry reg = JFaceResources.getImageRegistry(); |
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99 reg.put(CELL_EDITOR_IMG_DOTS_BUTTON, ImageDescriptor.createFromFile( |
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100 getImportData!("org.eclipse.jface.images.dots_button.gif")));//$NON-NLS-1$ |
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101 } |
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102 |
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103 /** |
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104 * Internal class for laying out the dialog. |
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105 */ |
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106 private class DialogCellLayout : Layout { |
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107 public override void layout(Composite editor, bool force) { |
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108 Rectangle bounds = editor.getClientArea(); |
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109 Point size = button.computeSize(SWT.DEFAULT, SWT.DEFAULT, force); |
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110 if (contents !is null) { |
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111 contents.setBounds(0, 0, bounds.width - size.x, bounds.height); |
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112 } |
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113 button.setBounds(bounds.width - size.x, 0, size.x, bounds.height); |
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114 } |
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115 |
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116 public override Point computeSize(Composite editor, int wHint, int hHint, |
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117 bool force) { |
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118 if (wHint !is SWT.DEFAULT && hHint !is SWT.DEFAULT) { |
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119 return new Point(wHint, hHint); |
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120 } |
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121 Point contentsSize = contents.computeSize(SWT.DEFAULT, SWT.DEFAULT, |
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122 force); |
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123 Point buttonSize = button.computeSize(SWT.DEFAULT, SWT.DEFAULT, |
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124 force); |
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125 // Just return the button width to ensure the button is not clipped |
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126 // if the label is long. |
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127 // The label will just use whatever extra width there is |
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128 Point result = new Point(buttonSize.x, Math.max(contentsSize.y, |
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129 buttonSize.y)); |
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130 return result; |
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131 } |
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132 } |
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133 |
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134 /** |
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135 * Default DialogCellEditor style |
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136 */ |
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137 private static const int defaultStyle = SWT.NONE; |
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138 |
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139 /** |
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140 * Creates a new dialog cell editor with no control |
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141 * @since 2.1 |
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142 */ |
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143 public this() { |
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144 setStyle(defaultStyle); |
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145 } |
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146 |
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147 /** |
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148 * Creates a new dialog cell editor parented under the given control. |
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149 * The cell editor value is <code>null</code> initially, and has no |
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150 * validator. |
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151 * |
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152 * @param parent the parent control |
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153 */ |
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154 protected this(Composite parent) { |
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155 this(parent, defaultStyle); |
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156 } |
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157 |
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158 /** |
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159 * Creates a new dialog cell editor parented under the given control. |
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160 * The cell editor value is <code>null</code> initially, and has no |
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161 * validator. |
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162 * |
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163 * @param parent the parent control |
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164 * @param style the style bits |
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165 * @since 2.1 |
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166 */ |
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167 protected this(Composite parent, int style) { |
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168 super(parent, style); |
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169 } |
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170 |
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171 /** |
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172 * Creates the button for this cell editor under the given parent control. |
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173 * <p> |
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174 * The default implementation of this framework method creates the button |
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175 * display on the right hand side of the dialog cell editor. Subclasses |
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176 * may extend or reimplement. |
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177 * </p> |
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178 * |
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179 * @param parent the parent control |
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180 * @return the new button control |
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181 */ |
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182 protected Button createButton(Composite parent) { |
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183 Button result = new Button(parent, SWT.DOWN); |
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184 result.setText("..."); //$NON-NLS-1$ |
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185 return result; |
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186 } |
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187 |
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188 /** |
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189 * Creates the controls used to show the value of this cell editor. |
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190 * <p> |
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191 * The default implementation of this framework method creates |
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192 * a label widget, using the same font and background color as the parent control. |
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193 * </p> |
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194 * <p> |
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195 * Subclasses may reimplement. If you reimplement this method, you |
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196 * should also reimplement <code>updateContents</code>. |
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197 * </p> |
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198 * |
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199 * @param cell the control for this cell editor |
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200 * @return the underlying control |
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201 */ |
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202 protected Control createContents(Composite cell) { |
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203 defaultLabel = new Label(cell, SWT.LEFT); |
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204 defaultLabel.setFont(cell.getFont()); |
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205 defaultLabel.setBackground(cell.getBackground()); |
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206 return defaultLabel; |
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207 } |
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208 |
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209 /* (non-Javadoc) |
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210 * Method declared on CellEditor. |
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211 */ |
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212 protected override Control createControl(Composite parent) { |
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213 |
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214 Font font = parent.getFont(); |
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215 Color bg = parent.getBackground(); |
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216 |
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217 editor = new Composite(parent, getStyle()); |
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218 editor.setFont(font); |
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219 editor.setBackground(bg); |
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220 editor.setLayout(new DialogCellLayout()); |
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221 |
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222 contents = createContents(editor); |
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223 updateContents(value); |
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224 |
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225 button = createButton(editor); |
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226 button.setFont(font); |
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227 |
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228 button.addKeyListener(new class KeyAdapter { |
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229 /* (non-Javadoc) |
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230 * @see org.eclipse.swt.events.KeyListener#keyReleased(org.eclipse.swt.events.KeyEvent) |
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231 */ |
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232 public void keyReleased(KeyEvent e) { |
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233 if (e.character is '\u001b') { // Escape |
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234 fireCancelEditor(); |
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235 } |
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236 } |
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237 }); |
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238 |
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239 button.addFocusListener(getButtonFocusListener()); |
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240 |
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241 button.addSelectionListener(new class SelectionAdapter { |
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242 /* (non-Javadoc) |
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243 * @see org.eclipse.swt.events.SelectionListener#widgetSelected(org.eclipse.swt.events.SelectionEvent) |
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244 */ |
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245 public void widgetSelected(SelectionEvent event) { |
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246 // Remove the button's focus listener since it's guaranteed |
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247 // to lose focus when the dialog opens |
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248 button.removeFocusListener(getButtonFocusListener()); |
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249 |
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250 Object newValue = openDialogBox(editor); |
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251 |
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252 // Re-add the listener once the dialog closes |
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253 button.addFocusListener(getButtonFocusListener()); |
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254 |
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255 if (newValue !is null) { |
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256 bool newValidState = isCorrect(newValue); |
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257 if (newValidState) { |
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258 markDirty(); |
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259 doSetValue(newValue); |
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260 } else { |
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261 // try to insert the current value into the error message. |
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262 setErrorMessage(Format(getErrorMessage(), |
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263 newValue.toString() )); |
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264 } |
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265 fireApplyEditorValue(); |
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266 } |
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267 } |
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268 }); |
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269 |
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270 setValueValid(true); |
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271 |
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272 return editor; |
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273 } |
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274 |
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275 /* (non-Javadoc) |
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276 * |
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277 * Override in order to remove the button's focus listener if the celleditor |
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278 * is deactivating. |
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279 * |
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280 * @see org.eclipse.jface.viewers.CellEditor#deactivate() |
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281 */ |
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282 public override void deactivate() { |
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283 if (button !is null && !button.isDisposed()) { |
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284 button.removeFocusListener(getButtonFocusListener()); |
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285 } |
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286 |
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287 super.deactivate(); |
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288 } |
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289 |
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290 /* (non-Javadoc) |
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291 * Method declared on CellEditor. |
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292 */ |
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293 protected override Object doGetValue() { |
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294 return value; |
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295 } |
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296 |
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297 /* (non-Javadoc) |
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298 * Method declared on CellEditor. |
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299 * The focus is set to the cell editor's button. |
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300 */ |
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301 protected override void doSetFocus() { |
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302 button.setFocus(); |
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303 |
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304 // add a FocusListener to the button |
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305 button.addFocusListener(getButtonFocusListener()); |
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306 } |
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307 |
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308 /** |
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309 * Return a listener for button focus. |
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310 * @return FocusListener |
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311 */ |
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312 private FocusListener getButtonFocusListener() { |
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313 if (buttonFocusListener is null) { |
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314 buttonFocusListener = new class FocusListener { |
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315 |
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316 /* (non-Javadoc) |
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317 * @see org.eclipse.swt.events.FocusListener#focusGained(org.eclipse.swt.events.FocusEvent) |
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318 */ |
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319 public void focusGained(FocusEvent e) { |
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320 // Do nothing |
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321 } |
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322 |
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323 /* (non-Javadoc) |
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324 * @see org.eclipse.swt.events.FocusListener#focusLost(org.eclipse.swt.events.FocusEvent) |
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325 */ |
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326 public void focusLost(FocusEvent e) { |
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327 this.outer.focusLost(); |
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328 } |
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329 }; |
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330 } |
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331 |
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332 return buttonFocusListener; |
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333 } |
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334 |
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335 /* (non-Javadoc) |
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336 * Method declared on CellEditor. |
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337 */ |
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338 protected override void doSetValue(Object value) { |
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339 this.value = value; |
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340 updateContents(value); |
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341 } |
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342 |
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343 /** |
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344 * Returns the default label widget created by <code>createContents</code>. |
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345 * |
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346 * @return the default label widget |
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347 */ |
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348 protected Label getDefaultLabel() { |
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349 return defaultLabel; |
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350 } |
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351 |
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352 /** |
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353 * Opens a dialog box under the given parent control and returns the |
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354 * dialog's value when it closes, or <code>null</code> if the dialog |
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355 * was canceled or no selection was made in the dialog. |
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356 * <p> |
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357 * This framework method must be implemented by concrete subclasses. |
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358 * It is called when the user has pressed the button and the dialog |
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359 * box must pop up. |
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360 * </p> |
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361 * |
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362 * @param cellEditorWindow the parent control cell editor's window |
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363 * so that a subclass can adjust the dialog box accordingly |
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364 * @return the selected value, or <code>null</code> if the dialog was |
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365 * canceled or no selection was made in the dialog |
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366 */ |
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367 protected abstract Object openDialogBox(Control cellEditorWindow); |
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368 |
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369 /** |
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370 * Updates the controls showing the value of this cell editor. |
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371 * <p> |
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372 * The default implementation of this framework method just converts |
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373 * the passed object to a string using <code>toString</code> and |
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374 * sets this as the text of the label widget. |
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375 * </p> |
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376 * <p> |
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377 * Subclasses may reimplement. If you reimplement this method, you |
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378 * should also reimplement <code>createContents</code>. |
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379 * </p> |
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380 * |
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381 * @param value the new value of this cell editor |
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382 */ |
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383 protected void updateContents(Object value) { |
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384 if (defaultLabel is null) { |
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385 return; |
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386 } |
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387 |
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Added dwt-addons in original directory structure of eclipse.org
Frank Benoit <benoit@tionex.de>
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388 String text = "";//$NON-NLS-1$ |
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389 if (value !is null) { |
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390 text = value.toString(); |
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Frank Benoit <benoit@tionex.de>
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391 } |
bc29606a740c
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392 defaultLabel.setText(text); |
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Added dwt-addons in original directory structure of eclipse.org
Frank Benoit <benoit@tionex.de>
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393 } |
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Added dwt-addons in original directory structure of eclipse.org
Frank Benoit <benoit@tionex.de>
parents:
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394 } |