| /******************************************************************************* |
| * Copyright (c) 2007, 2009 IBM Corporation and others. |
| * All rights reserved. This program and the accompanying materials |
| * are made available under the terms of the Eclipse Public License v1.0 |
| * which accompanies this distribution, and is available at |
| * http://www.eclipse.org/legal/epl-v10.html |
| * |
| * Contributors: |
| * IBM Corporation - initial API and implementation |
| * Tom Schindl <tom.schindl@bestsolution.at> - initial API and implementation |
| * bugfix in: 182800 |
| ******************************************************************************/ |
| |
| package org.eclipse.jface.viewers; |
| |
| /** |
| * @since 3.3 |
| * |
| */ |
| public abstract class FocusCellHighlighter { |
| private ColumnViewer viewer; |
| private SWTFocusCellManager mgr; |
| |
| /** |
| * @param viewer |
| */ |
| public FocusCellHighlighter(ColumnViewer viewer) { |
| this.viewer = viewer; |
| } |
| |
| void setMgr(SWTFocusCellManager mgr) { |
| this.mgr = mgr; |
| } |
| |
| /** |
| * @return the focus cell |
| */ |
| public ViewerCell getFocusCell() { |
| // Mgr is normally not null because the highlighter is passed |
| // to the SWTFocusCellManager instance |
| if( mgr != null ) { |
| // Use this method because it ensure that no |
| // cell update (which might cause scrolling) happens |
| return mgr._getFocusCell(); |
| } |
| |
| return viewer.getColumnViewerEditor().getFocusCell(); |
| } |
| |
| /** |
| * Called by the framework when the focus cell has changed. Subclasses may |
| * extend. |
| * |
| * @param cell |
| * the new focus cell |
| * @deprecated use {@link #focusCellChanged(ViewerCell, ViewerCell)} instead |
| */ |
| protected void focusCellChanged(ViewerCell cell) { |
| } |
| |
| /** |
| * Called by the framework when the focus cell has changed. Subclasses may |
| * extend. |
| * <p> |
| * <b>The default implementation for this method calls |
| * focusCellChanged(ViewerCell). Subclasses should override this method |
| * rather than {@link #focusCellChanged(ViewerCell)} .</b> |
| * |
| * @param newCell |
| * the new focus cell or <code>null</code> if no new cell |
| * receives the focus |
| * @param oldCell |
| * the old focus cell or <code>null</code> if no cell has been |
| * focused before |
| * @since 3.4 |
| */ |
| protected void focusCellChanged(ViewerCell newCell, ViewerCell oldCell) { |
| focusCellChanged(newCell); |
| } |
| |
| /** |
| * This method is called by the framework to initialize this cell |
| * highlighter object. Subclasses may extend. |
| */ |
| protected void init() { |
| } |
| } |