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annotate org.eclipse.jface/src/org/eclipse/jface/viewers/SWTFocusCellManager.d @ 12:bc29606a740c

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Added dwt-addons in original directory structure of eclipse.org
author Frank Benoit <benoit@tionex.de>
date Sat, 14 Mar 2009 18:23:29 +0100
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1 /*******************************************************************************
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2 * Copyright (c) 2007, 2008 IBM Corporation and others.
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3 * All rights reserved. This program and the accompanying materials
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4 * are made available under the terms of the Eclipse Public License v1.0
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5 * which accompanies this distribution, and is available at
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6 * http://www.eclipse.org/legal/epl-v10.html
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7 *
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8 * Contributors:
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9 * IBM Corporation - initial API and implementation
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10 * Tom Schindl <tom.schindl@bestsolution.at> - initial API and implementation
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11 * - bug fix for bug 187189, 182800, 215069
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12 * Port to the D programming language:
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13 * Frank Benoit <benoit@tionex.de>
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14 *******************************************************************************/
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15
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16 module org.eclipse.jface.viewers.SWTFocusCellManager;
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17
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18 import java.lang.all;
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19
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20 import org.eclipse.jface.viewers.CellNavigationStrategy;
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21 import org.eclipse.jface.viewers.ColumnViewer;
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22 import org.eclipse.jface.viewers.ViewerCell;
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23 import org.eclipse.jface.viewers.ViewerRow;
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24 import org.eclipse.jface.viewers.FocusCellHighlighter;
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25 import org.eclipse.jface.viewers.Viewer;
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26 import org.eclipse.jface.viewers.ISelectionChangedListener;
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27 import org.eclipse.jface.viewers.SelectionChangedEvent;
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28
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29 import org.eclipse.swt.SWT;
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30 import org.eclipse.swt.events.DisposeEvent;
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31 import org.eclipse.swt.events.DisposeListener;
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32 import org.eclipse.swt.graphics.Point;
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33 import org.eclipse.swt.widgets.Event;
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34 import org.eclipse.swt.widgets.Listener;
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35 import org.eclipse.core.runtime.Assert;
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36
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37 /**
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38 * This class is responsible to provide cell management base features for the
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39 * SWT-Controls {@link org.eclipse.swt.widgets.Table} and
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40 * {@link org.eclipse.swt.widgets.Tree}.
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41 *
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42 * @since 3.3
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43 *
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44 */
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45 abstract class SWTFocusCellManager {
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46
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47 private CellNavigationStrategy navigationStrategy;
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48
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49 private ColumnViewer viewer;
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50
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51 private ViewerCell focusCell;
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52
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53 private FocusCellHighlighter cellHighlighter;
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54
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55 private DisposeListener itemDeletionListener;
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56
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57
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58 /**
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59 * @param viewer
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60 * @param focusDrawingDelegate
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61 * @param navigationDelegate
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62 */
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63 public this(ColumnViewer viewer,
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64 FocusCellHighlighter focusDrawingDelegate,
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65 CellNavigationStrategy navigationDelegate) {
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66
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67 itemDeletionListener = new class DisposeListener {
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68 public void widgetDisposed(DisposeEvent e) {
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69 setFocusCell(null);
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70 }
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71 };
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72
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73 this.viewer = viewer;
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74 this.cellHighlighter = focusDrawingDelegate;
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75 this.navigationStrategy = navigationDelegate;
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76 hookListener(viewer);
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77 }
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78
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79 /**
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80 * This method is called by the framework to initialize this cell manager.
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81 */
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82 void init() {
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83 this.cellHighlighter.init_package();
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84 this.navigationStrategy.init_package();
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85 }
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86
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87 private void handleMouseDown(Event event) {
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88 ViewerCell cell = viewer.getCell(new Point(event.x, event.y));
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89 if (cell !is null) {
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90
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91 if (!cell.opEquals(focusCell)) {
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92 setFocusCell(cell);
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93 }
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94 }
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95 }
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96
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97 private void handleKeyDown(Event event) {
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98 ViewerCell tmp = null;
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99
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100 if (navigationStrategy.isCollapseEvent(viewer, focusCell, event)) {
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101 navigationStrategy.collapse(viewer, focusCell, event);
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102 } else if (navigationStrategy.isExpandEvent(viewer, focusCell, event)) {
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103 navigationStrategy.expand(viewer, focusCell, event);
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104 } else if (navigationStrategy.isNavigationEvent(viewer, event)) {
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105 tmp = navigationStrategy.findSelectedCell(viewer, focusCell, event);
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106
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107 if (tmp !is null) {
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108 if (!tmp.opEquals(focusCell)) {
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109 setFocusCell(tmp);
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110 }
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111 }
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112 }
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113
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114 if (navigationStrategy.shouldCancelEvent(viewer, event)) {
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115 event.doit = false;
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116 }
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117 }
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118
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119 private void handleSelection(Event event) {
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120 if ((event.detail & SWT.CHECK) is 0 && focusCell !is null && focusCell.getItem() !is event.item
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121 && event.item !is null ) {
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122 ViewerRow row = viewer.getViewerRowFromItem_package(event.item);
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123 Assert
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124 .isNotNull(row,
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125 "Internal Structure invalid. Row item has no row ViewerRow assigned"); //$NON-NLS-1$
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126 ViewerCell tmp = row.getCell(focusCell.getColumnIndex());
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127 if (!focusCell.opEquals(tmp)) {
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128 setFocusCell(tmp);
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129 }
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130 }
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131 }
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132
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133 private void handleFocusIn(Event event) {
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134 if (focusCell is null) {
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135 setFocusCell(getInitialFocusCell());
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136 }
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137 }
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138
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139 abstract ViewerCell getInitialFocusCell();
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140
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141 private void hookListener(ColumnViewer viewer) {
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142 Listener listener = new class Listener {
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143
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144 public void handleEvent(Event event) {
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145 switch (event.type) {
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146 case SWT.MouseDown:
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147 handleMouseDown(event);
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148 break;
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149 case SWT.KeyDown:
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150 handleKeyDown(event);
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151 break;
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152 case SWT.Selection:
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153 handleSelection(event);
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154 break;
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155 case SWT.FocusIn:
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156 handleFocusIn(event);
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157 break;
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158 default:
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159 }
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160 }
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161 };
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162
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163 viewer.getControl().addListener(SWT.MouseDown, listener);
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164 viewer.getControl().addListener(SWT.KeyDown, listener);
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165 viewer.getControl().addListener(SWT.Selection, listener);
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166 viewer.addSelectionChangedListener(new class ISelectionChangedListener {
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167
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168 public void selectionChanged(SelectionChangedEvent event) {
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169 if( event.getSelection_package.isEmpty() ) {
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170 setFocusCell(null);
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171 }
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172 }
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173
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174 });
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175 viewer.getControl().addListener(SWT.FocusIn, listener);
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176 }
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177
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178 /**
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179 * @return the cell with the focus
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180 *
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181 */
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182 public ViewerCell getFocusCell() {
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183 return focusCell;
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184 }
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185
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186 void setFocusCell(ViewerCell focusCell) {
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187 ViewerCell oldCell = this.focusCell;
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188
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189 if( this.focusCell !is null && ! this.focusCell.getItem().isDisposed() ) {
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190 this.focusCell.getItem().removeDisposeListener(itemDeletionListener);
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191 }
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192
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193 this.focusCell = focusCell;
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194
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195 if( this.focusCell !is null && ! this.focusCell.getItem().isDisposed() ) {
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196 this.focusCell.getItem().addDisposeListener(itemDeletionListener);
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197 }
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198
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199 this.cellHighlighter.focusCellChanged_package(focusCell,oldCell);
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200 }
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201
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202 ColumnViewer getViewer() {
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203 return viewer;
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204 }
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205 }