/*******************************************************************************

 * Copyright (c) 2008 Matthew Hall 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:

 *     Matthew Hall - initial API and implementation (bug 234496)

 ******************************************************************************/

package org.eclipse.jface.databinding.viewers;

import org.eclipse.core.databinding.observable.IObservable;

import org.eclipse.core.databinding.observable.masterdetail.IObservableFactory;

import org.eclipse.core.databinding.observable.value.IObservableValue;

import org.eclipse.jface.databinding.swt.SWTObservables;

import org.eclipse.jface.viewers.CellEditor;

import org.eclipse.jface.viewers.TextCellEditor;

import org.eclipse.swt.SWT;

/**

 * A factory for creating observables for JFace CellEditors.

 * 

 * @since 1.3

 * @author Matthew Hall

 */

public class CellEditorObservables {

	/**

	 * Returns an IObservableValue tracking the value of the passed in

	 * CellEditor.

	 * 

	 * @param cellEditor

	 *            the cell editor to track

	 * @return an IObservableValue tracking the value of the passed in

	 *         CellEditor.

	 */

	public static IObservableValue observeValue(CellEditor cellEditor) {

		if (cellEditor instanceof TextCellEditor)

			return SWTObservables.observeText(cellEditor.getControl(),

					SWT.Modify);

		throw new IllegalArgumentException(

				"CellEditor [" + cellEditor.getClass().getName() + "] is not supported."); //$NON-NLS-1$//$NON-NLS-2$

	}

	/**

	 * Returns an IObservableFactory which produces an IObservableValue which

	 * tracks the value of a target CellEditor.

	 * 

	 * @return an IObservableFactory which produces an IObservableValue which

	 *         tracks the value of a target CellEditor.

	 */

	public static IObservableFactory valueFactory() {

		return new IObservableFactory() {

			public IObservable createObservable(Object target) {

				return observeValue((CellEditor) target);

			}

		};

	}

}