| /******************************************************************************* |
| * Copyright (c) 2007, 2015 IBM Corporation 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: |
| * IBM Corporation - initial API and implementation |
| ******************************************************************************/ |
| |
| package org.eclipse.ui.internal; |
| |
| import org.eclipse.core.commands.AbstractHandler; |
| import org.eclipse.core.commands.HandlerEvent; |
| |
| /** |
| * Abstract base class that provides the enabled state, where changing the state |
| * fires the HandlerEvent. |
| * |
| * @since 3.3 |
| */ |
| public abstract class AbstractEnabledHandler extends AbstractHandler { |
| |
| private boolean enabled = true; |
| |
| @Override |
| public boolean isEnabled() { |
| return enabled; |
| } |
| |
| /** |
| * Sets the enabled state. Changing the state fires the HandlerEvent. |
| * |
| * @param isEnabled true to enable the handler, false to disable. |
| */ |
| protected void setEnabled(boolean isEnabled) { |
| if (enabled != isEnabled) { |
| enabled = isEnabled; |
| fireHandlerChanged(new HandlerEvent(this, true, false)); |
| } |
| } |
| } |
