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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.internal.text.TableOwnerDrawSupport;
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14
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131
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15 import dwtx.jface.internal.text.NonDeletingPositionUpdater; // packageimport
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16 import dwtx.jface.internal.text.InternalAccessor; // packageimport
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17 import dwtx.jface.internal.text.StickyHoverManager; // packageimport
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18 import dwtx.jface.internal.text.InformationControlReplacer; // packageimport
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19 import dwtx.jface.internal.text.DelayedInputChangeListener; // packageimport
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20
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21
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129
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22 import dwt.dwthelper.utils;
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23
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24 import dwt.DWT;
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25 import dwt.custom.StyleRange;
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26 import dwt.graphics.Color;
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27 import dwt.graphics.GC;
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28 import dwt.graphics.Image;
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29 import dwt.graphics.Rectangle;
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30 import dwt.graphics.TextLayout;
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31 import dwt.widgets.Event;
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32 import dwt.widgets.Listener;
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33 import dwt.widgets.Table;
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34 import dwt.widgets.TableItem;
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35
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36
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37 /**
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38 * Adds owner draw support for tables.
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39 *
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40 * @since 3.4
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41 */
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42 public class TableOwnerDrawSupport : Listener {
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43
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44 private static final String STYLED_RANGES_KEY= "styled_ranges"; //$NON-NLS-1$
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45
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46 private TextLayout fLayout;
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47
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48 public static void install(Table table) {
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49 TableOwnerDrawSupport listener= new TableOwnerDrawSupport(table);
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50 table.addListener(DWT.Dispose, listener);
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51 table.addListener(DWT.MeasureItem, listener);
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52 table.addListener(DWT.EraseItem, listener);
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53 table.addListener(DWT.PaintItem, listener);
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54 }
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55
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56 /**
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57 * Stores the styled ranges in the given table item.
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58 *
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59 * @param item table item
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60 * @param column the column index
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61 * @param ranges the styled ranges or <code>null</code> to remove them
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62 */
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63 public static void storeStyleRanges(TableItem item, int column, StyleRange[] ranges) {
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64 item.setData(STYLED_RANGES_KEY + column, ranges);
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65 }
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66
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67 /**
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68 * Returns the styled ranges which are stored in the given table item.
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69 *
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70 * @param item table item
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71 * @param column the column index
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72 * @return the styled ranges
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73 */
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74 private static StyleRange[] getStyledRanges(TableItem item, int column) {
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75 return (StyleRange[])item.getData(STYLED_RANGES_KEY + column);
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76 }
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77
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78 private TableOwnerDrawSupport(Table table) {
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79 int orientation= table.getStyle() & (DWT.LEFT_TO_RIGHT | DWT.RIGHT_TO_LEFT);
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80 fLayout= new TextLayout(table.getDisplay());
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81 fLayout.setOrientation(orientation);
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82 }
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83
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84 /*
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85 * @see dwt.widgets.Listener#handleEvent(dwt.widgets.Event)
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86 */
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87 public void handleEvent(Event event) {
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88 switch (event.type) {
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89 case DWT.MeasureItem:
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90 break;
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91 case DWT.EraseItem:
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92 event.detail &= ~DWT.FOREGROUND;
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93 break;
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94 case DWT.PaintItem:
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95 performPaint(event);
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96 break;
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97 case DWT.Dispose:
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98 widgetDisposed();
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99 break;
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100 }
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101 }
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102
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103 /**
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104 * Performs the paint operation.
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105 *
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106 * @param event the event
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107 */
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108 private void performPaint(Event event) {
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109 TableItem item= (TableItem) event.item;
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110 GC gc= event.gc;
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111 int index= event.index;
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112
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113 bool isSelected= (event.detail & DWT.SELECTED) !is 0;
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114
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115 // Remember colors to restore the GC later
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116 Color oldForeground= gc.getForeground();
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117 Color oldBackground= gc.getBackground();
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118
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119 if (!isSelected) {
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120 Color foreground= item.getForeground(index);
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121 gc.setForeground(foreground);
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122
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123 Color background= item.getBackground(index);
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124 gc.setBackground(background);
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125 }
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126
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127 Image image=item.getImage(index);
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128 if (image !is null) {
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129 Rectangle imageBounds=item.getImageBounds(index);
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130 Rectangle bounds=image.getBounds();
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131 int x=imageBounds.x + Math.max(0, (imageBounds.width - bounds.width) / 2);
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132 int y=imageBounds.y + Math.max(0, (imageBounds.height - bounds.height) / 2);
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133 gc.drawImage(image, x, y);
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134 }
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135
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136 fLayout.setFont(item.getFont(index));
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137
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138 // XXX: needed to clear the style info, see https://bugs.eclipse.org/bugs/show_bug.cgi?id=226090
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139 fLayout.setText(""); //$NON-NLS-1$
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140
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141 fLayout.setText(item.getText(index));
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142
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143 StyleRange[] ranges= getStyledRanges(item, index);
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144 if (ranges !is null) {
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145 for (int i= 0; i < ranges.length; i++) {
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146 StyleRange curr= ranges[i];
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147 if (isSelected) {
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148 curr= (StyleRange) curr.clone();
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149 curr.foreground= null;
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150 curr.background= null;
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151 }
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152 fLayout.setStyle(curr, curr.start, curr.start + curr.length - 1);
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153 }
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154 }
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155
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156 Rectangle textBounds=item.getTextBounds(index);
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157 if (textBounds !is null) {
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158 Rectangle layoutBounds=fLayout.getBounds();
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159 int x=textBounds.x;
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160 int y=textBounds.y + Math.max(0, (textBounds.height - layoutBounds.height) / 2);
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161 fLayout.draw(gc, x, y);
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162 }
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163
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164 if ((event.detail & DWT.FOCUSED) !is 0) {
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165 Rectangle focusBounds=item.getBounds();
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166 gc.drawFocus(focusBounds.x, focusBounds.y, focusBounds.width, focusBounds.height);
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167 }
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168
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169 if (!isSelected) {
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170 gc.setForeground(oldForeground);
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171 gc.setBackground(oldBackground);
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172 }
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173 }
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174
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175 private void widgetDisposed() {
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176 fLayout.dispose();
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177 }
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178 }
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179
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