| /******************************************************************************* |
| * Copyright (c) 2000, 2005 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.help.ui.internal; |
| import org.eclipse.help.internal.base.*; |
| import org.eclipse.swt.widgets.*; |
| public class HelpUIEventLoop { |
| /** |
| * Indicates whether run had a chance to execute and display got created |
| */ |
| private static boolean started = false; |
| /** |
| * Indicates whether it is still running |
| */ |
| private static boolean running = false; |
| private static Display display; |
| /** |
| * Called by base in stand-alone help since it cannot run event loop |
| */ |
| public static void run() { |
| try { |
| if (display == null) |
| display = Display.getCurrent(); |
| if (display == null) |
| display = new Display(); |
| } finally { |
| started = true; |
| } |
| try { |
| running = true; |
| while (HelpApplication.isRunning()) { |
| try { |
| if (!display.readAndDispatch()) { |
| display.sleep(); |
| } |
| } catch (Throwable t) { |
| HelpBasePlugin.logError(t.getMessage(), t); |
| } |
| } |
| display.dispose(); |
| display = null; |
| } finally { |
| running = false; |
| } |
| } |
| public static void wakeup() { |
| Display d = display; |
| if (d != null) |
| try { |
| d.wake(); |
| } catch (Exception e) { |
| } |
| } |
| /** |
| * Blocks until the loop is started (Display created) |
| */ |
| public static void waitFor() { |
| while (!started && HelpApplication.isRunning()) { |
| try { |
| Thread.sleep(100); |
| } catch (InterruptedException ie) { |
| } |
| } |
| } |
| /** |
| * @return Returns if loop is running. |
| */ |
| public static boolean isRunning() { |
| return running; |
| } |
| } |