| /******************************************************************************* |
| * Copyright (c) 2011 Tasktop Technologies. |
| * 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: |
| * Tasktop Technologies - initial API and implementation |
| *******************************************************************************/ |
| |
| package org.eclipse.mylyn.internal.sandbox.search.ui; |
| |
| import org.eclipse.core.commands.AbstractHandler; |
| import org.eclipse.core.commands.ExecutionEvent; |
| import org.eclipse.core.commands.ExecutionException; |
| import org.eclipse.swt.widgets.Display; |
| import org.eclipse.ui.IWorkbenchWindow; |
| import org.eclipse.ui.PlatformUI; |
| import org.eclipse.ui.handlers.HandlerUtil; |
| |
| /** |
| * @author David Green |
| */ |
| public abstract class AbstractUiHandler extends AbstractHandler { |
| |
| public Object execute(ExecutionEvent event) throws ExecutionException { |
| Display display = computeDisplay(event); |
| display.asyncExec(computeUiRunnable(event)); |
| return null; |
| } |
| |
| protected abstract Runnable computeUiRunnable(ExecutionEvent event); |
| |
| protected IWorkbenchWindow computeWorkbenchWindow(ExecutionEvent event) { |
| IWorkbenchWindow window = HandlerUtil.getActiveWorkbenchWindow(event); |
| if (window == null) { |
| window = PlatformUI.getWorkbench().getActiveWorkbenchWindow(); |
| if (window == null) { |
| window = PlatformUI.getWorkbench().getWorkbenchWindows()[0]; |
| } |
| } |
| return window; |
| } |
| |
| protected Display computeDisplay(ExecutionEvent event) { |
| Display display = null; |
| final IWorkbenchWindow workbenchWindow = computeWorkbenchWindow(event); |
| if (workbenchWindow != null) { |
| display = workbenchWindow.getShell().getDisplay(); |
| } |
| if (display == null) { |
| display = Display.getDefault(); |
| } |
| return display; |
| } |
| } |