| /******************************************************************************* |
| * Copyright (c) 2007 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 207844) |
| * IBM Corporation - initial API and implementation |
| * Brad Reynolds - initial API and implementation |
| * Matthew Hall - bug 212235 |
| *******************************************************************************/ |
| package org.eclipse.jface.internal.databinding.internal.swt; |
| |
| import org.eclipse.core.databinding.observable.Diffs; |
| import org.eclipse.core.databinding.observable.Realm; |
| import org.eclipse.core.databinding.observable.value.IObservableValue; |
| import org.eclipse.jface.internal.databinding.provisional.swt.AbstractSWTObservableValue; |
| import org.eclipse.swt.widgets.Shell; |
| |
| /** |
| * An {@link IObservableValue} that tracks the text of a Shell. |
| * |
| * @since 1.2 |
| */ |
| public class ShellObservableValue extends AbstractSWTObservableValue { |
| |
| private final Shell shell; |
| |
| /** |
| * Constructs a ShellObservableValue which tracks the text of the given |
| * Shell. |
| * |
| * @param shell |
| * the shell to track |
| */ |
| public ShellObservableValue(Shell shell) { |
| super(shell); |
| this.shell = shell; |
| } |
| |
| /** |
| * Constructs a ShellObservableValue belonging to the given realm, which |
| * tracks the text of the given shell. |
| * |
| * @param realm |
| * the realm of the constructed observable |
| * @param shell |
| * the shell to track |
| */ |
| public ShellObservableValue(Realm realm, Shell shell) { |
| super(realm, shell); |
| this.shell = shell; |
| } |
| |
| protected void doSetValue(final Object value) { |
| String oldValue = shell.getText(); |
| String newValue = value == null ? "" : value.toString(); //$NON-NLS-1$ |
| shell.setText(newValue); |
| |
| if (!newValue.equals(oldValue)) { |
| fireValueChange(Diffs.createValueDiff(oldValue, newValue)); |
| } |
| } |
| |
| protected Object doGetValue() { |
| return shell.getText(); |
| } |
| |
| public Object getValueType() { |
| return String.class; |
| } |
| } |