Mercurial > projects > dwt-addons
annotate dwtx/jface/viewers/CellNavigationStrategy.d @ 123:ddeafd007ce4
Fix: missing switch default. Thx yidabu for reporting.
| author | Frank Benoit <benoit@tionex.de> |
|---|---|
| date | Sat, 16 Aug 2008 13:24:47 +0200 |
| parents | b6c35faf97c8 |
| children |
| rev | line source |
|---|---|
| 10 | 1 /******************************************************************************* |
| 2 * Copyright (c) 2007 IBM Corporation and others. | |
| 3 * All rights reserved. This program and the accompanying materials | |
| 4 * are made available under the terms of the Eclipse Public License v1.0 | |
| 5 * which accompanies this distribution, and is available at | |
| 6 * http://www.eclipse.org/legal/epl-v10.html | |
| 7 * | |
| 8 * Contributors: | |
| 9 * IBM Corporation - initial API and implementation | |
| 10 * Port to the D programming language: | |
| 11 * Frank Benoit <benoit@tionex.de> | |
| 12 ******************************************************************************/ | |
| 13 | |
| 14 module dwtx.jface.viewers.CellNavigationStrategy; | |
| 15 | |
| 16 import dwtx.jface.viewers.ColumnViewer; | |
| 17 import dwtx.jface.viewers.ViewerCell; | |
| 18 | |
| 19 import dwt.DWT; | |
| 20 import dwt.widgets.Event; | |
| 21 | |
| 22 /** | |
| 23 * This class implementation the strategy how the table is navigated using the | |
| 24 * keyboard. | |
| 25 * | |
| 26 * <p> | |
| 27 * <b>Subclasses can implement their custom navigation algorithms</b> | |
| 28 * </p> | |
| 29 * | |
| 30 * @since 3.3 | |
| 31 * | |
| 32 */ | |
| 33 public class CellNavigationStrategy { | |
| 34 /** | |
| 35 * is the given event an event which moves the selection to another cell | |
| 36 * | |
| 37 * @param viewer | |
| 38 * the viewer we are working for | |
| 39 * @param event | |
| 40 * the key event | |
| 41 * @return <code>true</code> if a new cell is searched | |
| 42 */ | |
| 43 public bool isNavigationEvent(ColumnViewer viewer, Event event) { | |
| 44 switch (event.keyCode) { | |
| 45 case DWT.ARROW_UP: | |
| 46 case DWT.ARROW_DOWN: | |
| 47 case DWT.ARROW_LEFT: | |
| 48 case DWT.ARROW_RIGHT: | |
| 49 case DWT.HOME: | |
| 50 case DWT.PAGE_DOWN: | |
| 51 case DWT.PAGE_UP: | |
| 52 case DWT.END: | |
| 53 return true; | |
| 54 default: | |
| 55 return false; | |
| 56 } | |
| 57 } | |
| 58 | |
| 59 /** | |
| 60 * @param viewer | |
| 61 * the viewer we are working for | |
| 62 * @param cellToCollapse | |
| 63 * the cell to collapse | |
| 64 * @param event | |
| 65 * the key event | |
| 66 * @return <code>true</code> if this event triggers collapsing of a node | |
| 67 */ | |
| 68 public bool isCollapseEvent(ColumnViewer viewer, | |
| 69 ViewerCell cellToCollapse, Event event) { | |
| 70 return false; | |
| 71 } | |
| 72 | |
| 73 /** | |
| 74 * @param viewer | |
| 75 * the viewer we are working for | |
| 76 * @param cellToExpand | |
| 77 * the cell to expand | |
| 78 * @param event | |
| 79 * the key event | |
| 80 * @return <code>true</code> if this event triggers expanding of a node | |
| 81 */ | |
| 82 public bool isExpandEvent(ColumnViewer viewer, ViewerCell cellToExpand, | |
| 83 Event event) { | |
| 84 return false; | |
| 85 } | |
| 86 | |
| 87 /** | |
| 88 * @param viewer | |
| 89 * the viewer working for | |
| 90 * @param cellToExpand | |
| 91 * the cell the user wants to expand | |
| 92 * @param event | |
| 93 * the event triggering the expansion | |
| 94 */ | |
| 95 public void expand(ColumnViewer viewer, ViewerCell cellToExpand, Event event) { | |
| 96 | |
| 97 } | |
| 98 | |
| 99 /** | |
| 100 * @param viewer | |
| 101 * the viewer working for | |
| 102 * @param cellToCollapse | |
| 103 * the cell the user wants to collapse | |
| 104 * @param event | |
| 105 * the event triggering the expansion | |
| 106 */ | |
| 107 public void collapse(ColumnViewer viewer, ViewerCell cellToCollapse, | |
| 108 Event event) { | |
| 109 | |
| 110 } | |
| 111 | |
| 112 /** | |
| 113 * @param viewer | |
| 114 * the viewer we are working for | |
| 115 * @param currentSelectedCell | |
| 116 * the cell currently selected | |
| 117 * @param event | |
| 118 * the key event | |
| 119 * @return the cell which is highlighted next or <code>null</code> if the | |
| 120 * default implementation is taken. E.g. it's fairly impossible to | |
| 121 * react on PAGE_DOWN requests | |
| 122 */ | |
| 123 public ViewerCell findSelectedCell(ColumnViewer viewer, | |
| 124 ViewerCell currentSelectedCell, Event event) { | |
| 125 | |
| 126 switch (event.keyCode) { | |
| 127 case DWT.ARROW_UP: | |
| 128 if (currentSelectedCell !is null) { | |
| 129 return currentSelectedCell.getNeighbor(ViewerCell.ABOVE, false); | |
| 130 } | |
| 131 break; | |
| 132 case DWT.ARROW_DOWN: | |
| 133 if (currentSelectedCell !is null) { | |
| 134 return currentSelectedCell.getNeighbor(ViewerCell.BELOW, false); | |
| 135 } | |
| 136 break; | |
| 137 case DWT.ARROW_LEFT: | |
| 138 if (currentSelectedCell !is null) { | |
| 139 return currentSelectedCell.getNeighbor(ViewerCell.LEFT, true); | |
| 140 } | |
| 141 break; | |
| 142 case DWT.ARROW_RIGHT: | |
| 143 if (currentSelectedCell !is null) { | |
| 144 return currentSelectedCell.getNeighbor(ViewerCell.RIGHT, true); | |
| 145 } | |
| 146 break; | |
|
123
ddeafd007ce4
Fix: missing switch default. Thx yidabu for reporting.
Frank Benoit <benoit@tionex.de>
parents:
10
diff
changeset
|
147 default: |
| 10 | 148 } |
| 149 | |
| 150 return null; | |
| 151 } | |
| 152 | |
| 153 /** | |
| 154 * This method is consulted to decide whether an event has to be canceled or | |
| 155 * not. By default events who collapse/expand tree-nodes are canceled | |
| 156 * | |
| 157 * @param viewer | |
| 158 * the viewer working for | |
| 159 * @param event | |
| 160 * the event | |
| 161 * @return <code>true</code> if the event has to be canceled | |
| 162 */ | |
| 163 public bool shouldCancelEvent(ColumnViewer viewer, Event event) { | |
| 164 return event.keyCode is DWT.ARROW_LEFT | |
| 165 || event.keyCode is DWT.ARROW_RIGHT; | |
| 166 } | |
| 167 | |
| 168 /** | |
| 169 * This method is called by the framework to initialize this navigation | |
| 170 * strategy object. Subclasses may extend. | |
| 171 */ | |
| 172 protected void init() { | |
| 173 } | |
| 174 package void init_package() { | |
| 175 init(); | |
| 176 } | |
| 177 } |