| /******************************************************************************* |
| * Copyright (c) 2006, 2007 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 |
| * fix in bug 151295,167325,201905 |
| *******************************************************************************/ |
| |
| package org.eclipse.jface.viewers; |
| |
| import org.eclipse.core.runtime.Assert; |
| |
| /** |
| * EditingSupport is the abstract superclass of the support for cell editing. |
| * |
| * @since 3.3 |
| * |
| */ |
| public abstract class EditingSupport { |
| |
| private ColumnViewer viewer; |
| |
| /** |
| * @param viewer |
| * a new viewer |
| */ |
| public EditingSupport(ColumnViewer viewer) { |
| Assert.isNotNull(viewer, "Viewer is not allowed to be null"); //$NON-NLS-1$ |
| this.viewer = viewer; |
| } |
| |
| /** |
| * The editor to be shown |
| * |
| * @param element |
| * the model element |
| * @return the CellEditor |
| */ |
| protected abstract CellEditor getCellEditor(Object element); |
| |
| /** |
| * Is the cell editable |
| * |
| * @param element |
| * the model element |
| * @return true if editable |
| */ |
| protected abstract boolean canEdit(Object element); |
| |
| /** |
| * Get the value to set to the editor |
| * |
| * @param element |
| * the model element |
| * @return the value shown |
| */ |
| protected abstract Object getValue(Object element); |
| |
| /** |
| * Restore the value from the CellEditor |
| * |
| * <p> |
| * <b>Subclasses should overwrite!</b> |
| * </p> |
| * |
| * @param element |
| * the model element |
| * @param value |
| * the new value |
| */ |
| protected abstract void setValue(Object element, Object value); |
| |
| /** |
| * @return the viewer this editing support works for |
| */ |
| public ColumnViewer getViewer() { |
| return viewer; |
| } |
| |
| /** |
| * Initialize the editor. Frameworks like Databinding can hook in here and provide |
| * a customized implementation. <p><b>Standard customers should not overwrite this method but {@link #getValue(Object)}</b></p> |
| * |
| * @param cellEditor |
| * the cell editor |
| * @param cell |
| * the cell the editor is working for |
| */ |
| protected void initializeCellEditorValue(CellEditor cellEditor, ViewerCell cell) { |
| Object value = getValue(cell.getElement()); |
| cellEditor.setValue(value); |
| } |
| |
| /** |
| * Save the value of the cell editor back to the model. Frameworks like Databinding can hook in here and provide |
| * a customized implementation. <p><b>Standard customers should not overwrite this method but {@link #setValue(Object, Object)} </b></p> |
| * @param cellEditor |
| * the cell-editor |
| * @param cell |
| * the cell the editor is working for |
| */ |
| protected void saveCellEditorValue(CellEditor cellEditor, ViewerCell cell) { |
| Object value = cellEditor.getValue(); |
| setValue(cell.getElement(), value); |
| } |
| |
| boolean isLegacySupport() { |
| return false; |
| } |
| } |