org.eclipse.debug.ui/ui/org/eclipse/debug/internal/ui/actions/context/BooleanRequestMonitor.java

/*******************************************************************************
 * Copyright (c) 2006 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.debug.internal.ui.actions.context;

import org.eclipse.debug.internal.ui.actions.provisional.IBooleanRequestMonitor;
import org.eclipse.jface.action.IAction;

/**
 * Boolean request monitor that collects boolean results from a number of voters.
 * Request is cancelled when one voter votes false.
 * 
 * @since 3.2
 *
 */
public class BooleanRequestMonitor extends AbstractRequestMonitor implements IBooleanRequestMonitor {
	
	private IAction fAction;
	private int fNumVoters;
	private int fNumOfVotes = 0;
	
	BooleanRequestMonitor(IAction action, int numVoters) {
		fAction = action;
		fNumVoters = numVoters;
	}

	/* (non-Javadoc)
	 * @see org.eclipse.debug.internal.ui.actions.provisional.IBooleanRequestMonitor#setResult(boolean)
	 */
	public void setResult(boolean result) {
		fNumOfVotes++;
		if (!isCanceled()) {
			if (!result) {
				setCanceled(true);
			}
		}
	}

	/* (non-Javadoc)
	 * @see org.eclipse.core.runtime.IProgressMonitor#done()
	 */
	public void done() {
		if (isCanceled()) {
			fAction.setEnabled(false);
		} else {
			fAction.setEnabled(fNumOfVotes == fNumVoters);
		} 
	}

}