ConnectableToolbarCommandHandler.java

/*******************************************************************************
 * Copyright (c) 2014 Wind River Systems, Inc. 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:
 * Wind River Systems - initial API and implementation
 *******************************************************************************/

package org.eclipse.tcf.te.tcf.ui.handler;

import java.util.Map;

import org.eclipse.core.commands.ExecutionEvent;
import org.eclipse.jface.viewers.IStructuredSelection;
import org.eclipse.jface.viewers.StructuredSelection;
import org.eclipse.osgi.util.NLS;
import org.eclipse.tcf.te.core.interfaces.IConnectable;
import org.eclipse.tcf.te.runtime.services.ServiceManager;
import org.eclipse.tcf.te.tcf.locator.interfaces.nodes.IPeerNode;
import org.eclipse.tcf.te.tcf.locator.interfaces.services.IDefaultContextService;
import org.eclipse.tcf.te.tcf.ui.nls.Messages;
import org.eclipse.tcf.te.ui.handler.ConnectableCommandHandler;
import org.eclipse.ui.PlatformUI;
import org.eclipse.ui.commands.IElementUpdater;
import org.eclipse.ui.menus.UIElement;

/**
 * ConnectableToolbarCommandHandler
 */
public class ConnectableToolbarCommandHandler extends ConnectableCommandHandler implements IElementUpdater {

	/* (non-Javadoc)
	 * @see org.eclipse.tcf.te.ui.handler.AbstractCommandHandler#getSelection(org.eclipse.core.commands.ExecutionEvent)
	 */
	@Override
	protected IStructuredSelection getSelection(ExecutionEvent event) {
		IPeerNode defaultContext = ServiceManager.getInstance().getService(IDefaultContextService.class).getDefaultContext(null);
	    return defaultContext != null ? new StructuredSelection(defaultContext) : new StructuredSelection();
	}

	/* (non-Javadoc)
	 * @see org.eclipse.ui.commands.IElementUpdater#updateElement(org.eclipse.ui.menus.UIElement, java.util.Map)
	 */
    @Override
    public void updateElement(final UIElement element, Map parameters) {
		final IPeerNode defaultContext = ServiceManager.getInstance().getService(IDefaultContextService.class).getDefaultContext(null);
    	PlatformUI.getWorkbench().getDisplay().asyncExec(new Runnable() {
			@Override
			public void run() {
		    	if (defaultContext != null && getAction() == IConnectable.ACTION_CONNECT) {
			    	element.setTooltip(NLS.bind(Messages.ConnectableToolbarCommandHandler_tooltip_connect, defaultContext.getName()));
		    	}
		    	else if (defaultContext != null && getAction() == IConnectable.ACTION_DISCONNECT) {
			    	element.setTooltip(NLS.bind(Messages.ConnectableToolbarCommandHandler_tooltip_disconnect, defaultContext.getName()));
		    	}
		    	else {
		    		element.setTooltip(null);
		    	}
			}
		});
    }
}