Mercurial > projects > dwt2
annotate org.eclipse.jface/src/org/eclipse/jface/viewers/TreeViewerFocusCellManager.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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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 * - fix in bug: 195908, 210752 |
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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.TreeViewerFocusCellManager; |
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17 |
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18 import org.eclipse.jface.viewers.SWTFocusCellManager; |
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19 import org.eclipse.jface.viewers.CellNavigationStrategy; |
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20 import org.eclipse.jface.viewers.TreeViewer; |
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21 import org.eclipse.jface.viewers.FocusCellHighlighter; |
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22 import org.eclipse.jface.viewers.ViewerCell; |
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23 import org.eclipse.jface.viewers.ColumnViewer; |
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24 |
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25 import org.eclipse.swt.SWT; |
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26 import org.eclipse.swt.widgets.Event; |
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27 import org.eclipse.swt.widgets.Item; |
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28 import org.eclipse.swt.widgets.Tree; |
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29 import org.eclipse.swt.widgets.TreeItem; |
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30 |
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31 import java.lang.all; |
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32 import java.util.Set; |
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33 |
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34 /** |
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35 * This class is responsible to provide the concept of cells for {@link Tree}. |
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36 * This concept is needed to provide features like editor activation with the |
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37 * keyboard |
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38 * |
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39 * @since 3.3 |
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40 * |
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41 */ |
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42 public class TreeViewerFocusCellManager : SWTFocusCellManager { |
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43 private static /+final+/ CellNavigationStrategy TREE_NAVIGATE; |
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44 static this(){ |
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45 TREE_NAVIGATE = new class CellNavigationStrategy { |
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46 public void collapse(ColumnViewer viewer, ViewerCell cellToCollapse, |
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47 Event event) { |
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48 if (cellToCollapse !is null) { |
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49 (cast(TreeItem) cellToCollapse.getItem()).setExpanded(false); |
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50 } |
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51 } |
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52 |
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53 public void expand(ColumnViewer viewer, ViewerCell cellToExpand, |
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54 Event event) { |
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55 if (cellToExpand !is null) { |
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56 TreeViewer v = cast(TreeViewer) viewer; |
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57 v.setExpandedState(v.getTreePathFromItem_package(cast(Item)cellToExpand |
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58 .getItem()), true); |
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59 } |
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60 } |
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61 |
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62 public bool isCollapseEvent(ColumnViewer viewer, |
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63 ViewerCell cellToCollapse, Event event) { |
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64 |
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65 if (cellToCollapse is null) { |
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66 return false; |
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67 } |
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68 |
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69 return cellToCollapse !is null |
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70 && (cast(TreeItem) cellToCollapse.getItem()).getExpanded() |
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71 && event.keyCode is SWT.ARROW_LEFT |
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72 && isFirstColumnCell(cellToCollapse); |
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73 } |
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74 |
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75 public bool isExpandEvent(ColumnViewer viewer, |
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76 ViewerCell cellToExpand, Event event) { |
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77 |
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78 if (cellToExpand is null) { |
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79 return false; |
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80 } |
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81 |
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82 return cellToExpand !is null |
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83 && (cast(TreeItem) cellToExpand.getItem()).getItemCount() > 0 |
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84 && !(cast(TreeItem) cellToExpand.getItem()).getExpanded() |
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85 && event.keyCode is SWT.ARROW_RIGHT |
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86 && isFirstColumnCell(cellToExpand); |
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87 } |
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88 |
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89 private bool isFirstColumnCell(ViewerCell cell) { |
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90 return cell.getViewerRow().getVisualIndex_package(cell.getColumnIndex()) is 0; |
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91 } |
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92 }; |
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93 } |
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94 |
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95 /** |
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96 * Create a new manager using a default navigation strategy: |
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97 * <ul> |
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98 * <li><code>SWT.ARROW_UP</code>: navigate to cell above</li> |
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99 * <li><code>SWT.ARROW_DOWN</code>: navigate to cell below</li> |
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100 * <li><code>SWT.ARROW_RIGHT</code>: on first column (collapses if item |
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101 * is expanded) else navigate to next visible cell on the right</li> |
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102 * <li><code>SWT.ARROW_LEFT</code>: on first column (expands if item is |
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103 * collapsed) else navigate to next visible cell on the left</li> |
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104 * </ul> |
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105 * |
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106 * @param viewer |
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107 * the viewer the manager is bound to |
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108 * @param focusDrawingDelegate |
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109 * the delegate responsible to highlight selected cell |
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110 */ |
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111 public this(TreeViewer viewer, |
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112 FocusCellHighlighter focusDrawingDelegate) { |
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113 this(viewer, focusDrawingDelegate, TREE_NAVIGATE); |
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114 } |
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115 |
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116 /** |
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117 * Create a new manager with a custom navigation strategy |
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118 * |
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119 * @param viewer |
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120 * the viewer the manager is bound to |
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121 * @param focusDrawingDelegate |
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122 * the delegate responsible to highlight selected cell |
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123 * @param navigationStrategy |
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124 * the strategy used to navigate the cells |
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125 * @since 3.4 |
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126 */ |
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127 public this(TreeViewer viewer, |
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128 FocusCellHighlighter focusDrawingDelegate, |
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129 CellNavigationStrategy navigationStrategy) { |
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130 super(viewer, focusDrawingDelegate, navigationStrategy); |
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131 } |
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132 |
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133 override ViewerCell getInitialFocusCell() { |
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134 Tree tree = cast(Tree) getViewer().getControl(); |
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135 |
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136 if (! tree.isDisposed() && tree.getItemCount() > 0 && ! tree.getItem(0).isDisposed()) { |
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137 return getViewer().getViewerRowFromItem_package(tree.getItem(0)).getCell(0); |
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138 } |
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139 |
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140 return null; |
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141 } |
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142 |
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143 public ViewerCell getFocusCell() { |
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144 ViewerCell cell = super.getFocusCell(); |
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145 Tree t = cast(Tree) getViewer().getControl(); |
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146 |
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147 // It is possible that the selection has changed under the hood |
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148 if (cell !is null) { |
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149 if (t.getSelection().length is 1 |
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150 && t.getSelection()[0] !is cell.getItem()) { |
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151 setFocusCell(getViewer().getViewerRowFromItem_package( |
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152 t.getSelection()[0]).getCell(cell.getColumnIndex())); |
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153 } |
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154 } |
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155 |
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156 return super.getFocusCell(); |
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157 } |
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158 } |