/*******************************************************************************
* Copyright (c) 2008, 2016 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.ui.examples.contributions.view;
import java.util.Map;
import org.eclipse.core.commands.AbstractHandler;
import org.eclipse.core.commands.ExecutionEvent;
import org.eclipse.jface.viewers.ISelection;
import org.eclipse.jface.viewers.IStructuredSelection;
import org.eclipse.ui.ISources;
import org.eclipse.ui.PlatformUI;
import org.eclipse.ui.commands.ICommandService;
import org.eclipse.ui.commands.IElementUpdater;
import org.eclipse.ui.examples.contributions.model.IPersonService;
import org.eclipse.ui.examples.contributions.model.Person;
import org.eclipse.ui.handlers.HandlerUtil;
import org.eclipse.ui.menus.UIElement;
import org.eclipse.ui.services.IEvaluationService;
/**
* Allow the admin rights to be updated.
*
* @since 3.4
*/
public class AdminHandler extends AbstractHandler implements IElementUpdater {
private static final String ID = "org.eclipse.ui.examples.contributions.view.adminRights"; //$NON-NLS-1$
@Override
public void updateElement(UIElement element, Map parameters) {
IEvaluationService service = PlatformUI
.getWorkbench().getService(IEvaluationService.class);
if (service == null) {
return;
}
ISelection sel = (ISelection) service.getCurrentState().getVariable(
ISources.ACTIVE_MENU_SELECTION_NAME);
if (!(sel instanceof IStructuredSelection)) {
return;
}
IStructuredSelection ssel = (IStructuredSelection) sel;
if (ssel.isEmpty()) {
return;
}
Object o = ssel.getFirstElement();
if (!(o instanceof Person)) {
return;
}
element.setChecked(((Person) o).hasAdminRights());
}
@Override
public Object execute(ExecutionEvent event) {
ISelection sel = HandlerUtil.getActiveMenuSelection(event);
if (!(sel instanceof IStructuredSelection)) {
return null;
}
IStructuredSelection ssel = (IStructuredSelection) sel;
if (ssel.isEmpty()) {
return null;
}
Object o = ssel.getFirstElement();
if (!(o instanceof Person)) {
return null;
}
Person p = (Person) o;
p.setAdminRights(!p.hasAdminRights());
IPersonService service = PlatformUI.getWorkbench()
.getService(IPersonService.class);
service.updatePerson(p);
ICommandService commands = PlatformUI.getWorkbench()
.getService(ICommandService.class);
commands.refreshElements(ID, null);
return null;
}
}