examples/org.eclipse.jface.snippets/Eclipse JFace Snippets/org/eclipse/jface/snippets/viewers/Snippet009CellEditors.java

/*******************************************************************************
 * Copyright (c) 2006, 2014 Tom Schindl and others.
 *
 * This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License 2.0
 * which accompanies this distribution, and is available at
 * https://www.eclipse.org/legal/epl-2.0/
 *
 * SPDX-License-Identifier: EPL-2.0
 *
 * Contributors:
 *     Tom Schindl - initial API and implementation
 *     Lars Vogel <Lars.Vogel@gmail.com> - Bug 414565
 *     Simon Scholz <simon.scholz@vogella.com> - Bug 442343, 448143
 *******************************************************************************/

package org.eclipse.jface.snippets.viewers;

import org.eclipse.jface.viewers.ArrayContentProvider;
import org.eclipse.jface.viewers.CellEditor;
import org.eclipse.jface.viewers.ColumnLabelProvider;
import org.eclipse.jface.viewers.EditingSupport;
import org.eclipse.jface.viewers.TableViewer;
import org.eclipse.jface.viewers.TableViewerColumn;
import org.eclipse.jface.viewers.TextCellEditor;
import org.eclipse.swt.SWT;
import org.eclipse.swt.layout.FillLayout;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.swt.widgets.Display;
import org.eclipse.swt.widgets.Shell;

/**
 * Edit cell values in a table
 *
 */
public class Snippet009CellEditors {
	public class MyModel {
		public int counter;

		public MyModel(int counter) {
			this.counter = counter;
		}

		@Override
		public String toString() {
			return "Item " + this.counter;
		}
	}

	public Snippet009CellEditors(Shell shell) {
		final TableViewer v = new TableViewer(shell,SWT.BORDER|SWT.FULL_SELECTION);
		v.setContentProvider(ArrayContentProvider.getInstance());

		TableViewerColumn viewerColumn = new TableViewerColumn(v, SWT.NONE);
		viewerColumn.getColumn().setText("Column1");
		viewerColumn.getColumn().setWidth(300);
		viewerColumn.setLabelProvider(new ColumnLabelProvider());
		viewerColumn.setEditingSupport(new EditingSupport(v) {

			@Override
			protected void setValue(Object element, Object value) {
				((MyModel) element).counter = Integer.parseInt(value.toString());
				getViewer().update(element, null);
			}

			@Override
			protected Object getValue(Object element) {
				return ((MyModel) element).counter + "";
			}

			@Override
			protected CellEditor getCellEditor(Object element) {
				return new TextCellEditor((Composite) getViewer().getControl());
			}

			@Override
			protected boolean canEdit(Object element) {
				return ((MyModel) element).counter % 2 == 0;
			}
		});


		MyModel[] model = createModel();
		v.setInput(model);
		v.getTable().setLinesVisible(true);
	}

	private MyModel[] createModel() {
		MyModel[] elements = new MyModel[10];

		for( int i = 0; i < 10; i++ ) {
			elements[i] = new MyModel(i);
		}

		return elements;
	}

	/**
	 * @param args
	 */
	public static void main(String[] args) {
		Display display = new Display ();
		Shell shell = new Shell(display);
		shell.setLayout(new FillLayout());
		new Snippet009CellEditors(shell);
		shell.open ();

		while (!shell.isDisposed ()) {
			if (!display.readAndDispatch ()) display.sleep ();
		}

		display.dispose ();

	}

}