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annotate dwtx/jface/viewers/DelegatingStyledCellLabelProvider.d @ 71:4878bef4a38e

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Some fixing
author Frank Benoit <benoit@tionex.de>
date Thu, 22 May 2008 04:03:58 +0200
parents 46a6e0e6ccd4
children 5df4896124c7
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1 /*******************************************************************************
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2 * Copyright (c) 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 * 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 dwtx.jface.viewers.DelegatingStyledCellLabelProvider;
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14
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15 import dwt.graphics.Color;
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16 import dwt.graphics.Font;
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17 import dwt.graphics.Image;
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18
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19 import dwt.dwthelper.utils;
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20
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21 /**
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22 * A {@link DelegatingStyledCellLabelProvider} is a
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23 * {@link StyledCellLabelProvider} that delegates requests for the styled string
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24 * and the image to a
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25 * {@link DelegatingStyledCellLabelProvider.IStyledLabelProvider}.
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26 *
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27 * <p>
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28 * Existing label providers can be enhanced by implementing
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29 * {@link DelegatingStyledCellLabelProvider.IStyledLabelProvider} so they can be
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30 * used in viewers with styled labels.
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31 * </p>
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32 *
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33 * <p>
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34 * The {@link DelegatingStyledCellLabelProvider.IStyledLabelProvider} can
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35 * optionally implement {@link IColorProvider} and {@link IFontProvider} to
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36 * provide foreground and background color and a default font.
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37 * </p>
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38 *
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39 * @since 3.4
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40 */
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41 public class DelegatingStyledCellLabelProvider : StyledCellLabelProvider {
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42
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43 /**
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44 * Interface marking a label provider that provides styled text labels and
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45 * images.
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46 * <p>
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47 * The {@link DelegatingStyledCellLabelProvider.IStyledLabelProvider} can
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48 * optionally implement {@link IColorProvider} and {@link IFontProvider} to
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49 * provide foreground and background color and a default font.
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50 * </p>
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51 */
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52 public static interface IStyledLabelProvider : IBaseLabelProvider {
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53
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54 /**
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55 * Returns the styled text label for the given element
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56 *
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57 * @param element
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58 * the element to evaluate the styled string for
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59 *
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60 * @return the styled string.
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61 */
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62 public StyledString getStyledText(Object element);
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63
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64 /**
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65 * Returns the image for the label of the given element. The image is
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66 * owned by the label provider and must not be disposed directly.
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67 * Instead, dispose the label provider when no longer needed.
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68 *
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69 * @param element
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70 * the element for which to provide the label image
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71 * @return the image used to label the element, or <code>null</code>
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72 * if there is no image for the given object
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73 */
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74 public Image getImage(Object element);
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75 }
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76
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77 private IStyledLabelProvider styledLabelProvider;
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78
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79 /**
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80 * Creates a {@link DelegatingStyledCellLabelProvider} that delegates the
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81 * requests for the styled labels and the images to a
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82 * {@link IStyledLabelProvider}.
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83 *
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84 * @param labelProvider
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85 * the label provider that provides the styled labels and the
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86 * images
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87 */
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88 public this(IStyledLabelProvider labelProvider) {
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89 if (labelProvider is null)
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90 throw new IllegalArgumentException(
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91 "Label provider must not be null"); //$NON-NLS-1$
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92
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93 this.styledLabelProvider = labelProvider;
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94 }
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95
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96 /*
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97 * (non-Javadoc)
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98 *
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99 * @see dwtx.jface.viewers.StyledCellLabelProvider#update(dwtx.jface.viewers.ViewerCell)
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100 */
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101 public void update(ViewerCell cell) {
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102 Object element = cell.getElement();
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103
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104 StyledString styledString = getStyledText(element);
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105 cell.setText(styledString.toString());
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106 if (isOwnerDrawEnabled()) {
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107 cell.setStyleRanges(styledString.getStyleRanges());
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108 } else {
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109 cell.setStyleRanges(null);
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110 }
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111
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112 cell.setImage(getImage(element));
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113 cell.setFont(getFont(element));
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114 cell.setForeground(getForeground(element));
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115 cell.setBackground(getBackground(element));
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116
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117 super.update(cell);
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118 }
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119
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120 /**
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121 * Provides a foreground color for the given element.
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122 *
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123 * @param element
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124 * the element
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125 * @return the foreground color for the element, or <code>null</code> to
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126 * use the default foreground color
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127 */
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128 public Color getForeground(Object element) {
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129 if (null !is cast(IColorProvider)this.styledLabelProvider ) {
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130 return (cast(IColorProvider) this.styledLabelProvider)
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131 .getForeground(element);
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132 }
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133 return null;
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134 }
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135
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136 /**
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137 * Provides a background color for the given element.
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138 *
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139 * @param element
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140 * the element
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141 * @return the background color for the element, or <code>null</code> to
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142 * use the default background color
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143 */
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144 public Color getBackground(Object element) {
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145 if (null !is cast(IColorProvider)this.styledLabelProvider) {
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146 return (cast(IColorProvider) this.styledLabelProvider)
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147 .getBackground(element);
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148 }
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149 return null;
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150 }
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151
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152 /**
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153 * Provides a font for the given element.
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154 *
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155 * @param element
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156 * the element
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157 * @return the font for the element, or <code>null</code> to use the
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158 * default font
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159 */
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160 public Font getFont(Object element) {
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161 if (null !is cast(IFontProvider)this.styledLabelProvider ) {
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162 return (cast(IFontProvider) this.styledLabelProvider).getFont(element);
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163 }
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164 return null;
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165 }
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166
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167 /**
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168 * Returns the image for the label of the given element. The image is owned
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169 * by the label provider and must not be disposed directly. Instead, dispose
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170 * the label provider when no longer needed.
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171 *
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172 * @param element
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173 * the element for which to provide the label image
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174 * @return the image used to label the element, or <code>null</code> if
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175 * there is no image for the given object
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176 */
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177 public Image getImage(Object element) {
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178 return this.styledLabelProvider.getImage(element);
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179 }
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180
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181 /**
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182 * Returns the styled text for the label of the given element.
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183 *
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184 * @param element
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185 * the element for which to provide the styled label text
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186 * @return the styled text string used to label the element
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187 */
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188 protected StyledString getStyledText(Object element) {
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189 return this.styledLabelProvider.getStyledText(element);
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190 }
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191
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192 /**
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193 * Returns the styled string provider.
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194 *
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195 * @return the wrapped label provider
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196 */
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197 public IStyledLabelProvider getStyledStringProvider() {
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198 return this.styledLabelProvider;
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199 }
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200
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201 public void addListener(ILabelProviderListener listener) {
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202 super.addListener(listener);
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203 this.styledLabelProvider.addListener(listener);
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204 }
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205
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206 public void removeListener(ILabelProviderListener listener) {
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207 super.removeListener(listener);
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208 this.styledLabelProvider.removeListener(listener);
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209 }
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210
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211 public bool isLabelProperty(Object element, String property) {
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212 return this.styledLabelProvider.isLabelProperty(element, property);
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213 }
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214
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215 public void dispose() {
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216 super.dispose();
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217 this.styledLabelProvider.dispose();
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218 }
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219
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220 }