| /******************************************************************************* |
| * Copyright (c) 2005 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 |
| ******************************************************************************/ |
| |
| package org.eclipse.jface.commands; |
| |
| import org.eclipse.jface.menus.IMenuStateIds; |
| import org.eclipse.jface.preference.IPreferenceStore; |
| |
| /** |
| * <p> |
| * A piece of state storing a {@link Boolean}. |
| * </p> |
| * <p> |
| * If this state is registered using {@link IMenuStateIds#STYLE}, then it will |
| * control the presentation of the command if displayed in the menus, tool bars |
| * or status line. |
| * </p> |
| * <p> |
| * Clients may instantiate this class, but must not extend. |
| * </p> |
| * <p> |
| * <strong>EXPERIMENTAL</strong>. This class or interface has been added as |
| * part of a work in progress. There is a guarantee neither that this API will |
| * work nor that it will remain the same. Please do not use this API without |
| * consulting with the Platform/UI team. |
| * </p> |
| * |
| * @since 3.2 |
| */ |
| public class ToggleState extends AbstractPersistentState { |
| |
| /** |
| * Constructs a new <code>ToggleState</code>. By default, the toggle is |
| * off (e.g., <code>false</code>). |
| */ |
| public ToggleState() { |
| setValue(Boolean.FALSE); |
| } |
| |
| public final void load(final IPreferenceStore store, |
| final String preferenceKey) { |
| if (isPersisted()) { |
| final boolean value = store.getBoolean(preferenceKey); |
| setValue(value ? Boolean.TRUE : Boolean.FALSE); |
| } |
| } |
| |
| public final void save(final IPreferenceStore store, |
| final String preferenceKey) { |
| if (isPersisted()) { |
| final Object value = getValue(); |
| if (value instanceof Boolean) { |
| store.setValue(preferenceKey, ((Boolean) value).booleanValue()); |
| } |
| } |
| } |
| |
| public void setValue(final Object value) { |
| if (!(value instanceof Boolean)) { |
| throw new IllegalArgumentException( |
| "ToggleState takes a Boolean as a value"); //$NON-NLS-1$ |
| } |
| |
| super.setValue(value); |
| } |
| } |