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1 /*******************************************************************************
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2 * Copyright (c) 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
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14 module dwtx.jface.viewers.TreeViewerFocusCellManager;
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15
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16 import dwtx.jface.viewers.SWTFocusCellManager;
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17 import dwtx.jface.viewers.CellNavigationStrategy;
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18 import dwtx.jface.viewers.TreeViewer;
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19 import dwtx.jface.viewers.FocusCellHighlighter;
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20 import dwtx.jface.viewers.ViewerCell;
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21 import dwtx.jface.viewers.ColumnViewer;
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22
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23 import dwt.DWT;
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24 import dwt.widgets.Event;
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25 import dwt.widgets.Item;
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26 import dwt.widgets.Tree;
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27 import dwt.widgets.TreeItem;
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28
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29 import dwt.dwthelper.utils;
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30
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31 /**
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32 * This class is responsible to provide the concept of cells for {@link Tree}.
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33 * This concept is needed to provide features like editor activation with the
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34 * keyboard
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35 *
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36 * @since 3.3
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37 *
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38 */
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39 public class TreeViewerFocusCellManager : SWTFocusCellManager {
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40 private static /+final+/ CellNavigationStrategy TREE_NAVIGATE;
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41 static this(){
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42 TREE_NAVIGATE = new class CellNavigationStrategy {
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43 public void collapse(ColumnViewer viewer, ViewerCell cellToCollapse,
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44 Event event) {
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45 if (cellToCollapse !is null) {
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46 (cast(TreeItem) cellToCollapse.getItem()).setExpanded(false);
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47 }
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48 }
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49
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50 public void expand(ColumnViewer viewer, ViewerCell cellToExpand,
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51 Event event) {
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52 if (cellToExpand !is null) {
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53 TreeViewer v = cast(TreeViewer) viewer;
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54 v.setExpandedState(v
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55 .getTreePathFromItem_package(cast(Item)cellToExpand.getItem()), true);
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56 }
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57 }
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58
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59 public bool isCollapseEvent(ColumnViewer viewer,
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60 ViewerCell cellToCollapse, Event event) {
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61 return cellToCollapse !is null
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62 && (cast(TreeItem) cellToCollapse.getItem()).getExpanded()
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63 && cellToCollapse.getColumnIndex() is 0
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64 && event.keyCode is DWT.ARROW_LEFT;
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65 }
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66
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67 public bool isExpandEvent(ColumnViewer viewer,
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68 ViewerCell cellToExpand, Event event) {
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69 return cellToExpand !is null
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70 && (cast(TreeItem) cellToExpand.getItem()).getItemCount() > 0
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71 && !(cast(TreeItem) cellToExpand.getItem()).getExpanded()
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72 && cellToExpand.getColumnIndex() is 0
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73 && event.keyCode is DWT.ARROW_RIGHT;
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74 }
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75 };
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76 }
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77 /**
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78 * Create a new manager
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79 *
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80 * @param viewer
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81 * the viewer the manager is bound to
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82 * @param focusDrawingDelegate
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83 * the delegate responsible to highlight selected cell
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84 */
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85 public this(TreeViewer viewer,
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86 FocusCellHighlighter focusDrawingDelegate) {
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87 super(viewer, focusDrawingDelegate,TREE_NAVIGATE);
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88 }
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89
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90 ViewerCell getInitialFocusCell() {
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91 Tree tree = cast(Tree) getViewer().getControl();
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92
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93 if( tree.getItemCount() > 0 ) {
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94 return getViewer().getViewerRowFromItem_package(tree.getItem(0)).getCell(0);
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95 }
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96
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97 return null;
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98 }
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99 }
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