org.eclipse.osbp.vaaclipse.addons.application/src/org/eclipse/osbp/vaaclipse/addons/application/handler/ShowFieldHelpForECViewHandler.java

/**
 * Copyright (c) 2011, 2014 - Lunifera GmbH (Gross Enzersdorf, Austria), Loetz GmbH&Co.KG (69115 Heidelberg, Germany)
 * 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: 
 * 		Florian Pirchner - Initial implementation
 */
package org.eclipse.osbp.vaaclipse.addons.application.handler;

import org.eclipse.core.commands.ParameterizedCommand;
import org.eclipse.e4.core.contexts.Active;
import org.eclipse.e4.core.di.annotations.CanExecute;
import org.eclipse.e4.core.di.annotations.Execute;
import org.eclipse.e4.core.di.annotations.Optional;
import org.eclipse.e4.ui.model.application.ui.MContext;
import org.eclipse.e4.ui.model.application.ui.basic.MPart;
import org.eclipse.osbp.vaaclipse.addons.common.api.IE4Constants;
import org.eclipse.osbp.vaaclipse.addons.common.api.help.IHelpViewService;

/**
 * Opens the field help view.
 */
public class ShowFieldHelpForECViewHandler extends AbstractHandler {

	/**
	 * Execute.
	 *
	 * @param context
	 *            the context
	 * @param part
	 *            the part
	 * @param command
	 *            the command
	 * @param helpService
	 *            the help service
	 */
	@Execute
	public void execute(@Active MContext context, @Active MPart part,
			ParameterizedCommand command, @Optional IHelpViewService helpService) {

		if (helpService == null) {
			return;
		}

		String fieldId = part.getElementId() + ":"
				+ command.getParameterMap().get(IE4Constants.KEYSTROKE_TARGET);
		helpService.openFieldHelp(fieldId, part.getContext());
	}

	/* (non-Javadoc)
	 * @see org.eclipse.osbp.vaaclipse.addons.application.handler.AbstractHandler#canExecute(org.eclipse.e4.ui.model.application.ui.MContext, org.eclipse.e4.ui.model.application.ui.basic.MPart, org.eclipse.core.commands.ParameterizedCommand)
	 */
	@CanExecute
	public boolean canExecute(@Active MContext context, @Active MPart part,
			ParameterizedCommand command) {
		return true;
	}

}