119 lines
4.0 KiB
Java
119 lines
4.0 KiB
Java
/*
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* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed with
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* this work for additional information regarding copyright ownership.
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* The ASF licenses this file to You under the Apache License, Version 2.0
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* (the "License"); you may not use this file except in compliance with
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* the License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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/**
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* @author Michael Danilov, Pavel Dolgov
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* @version $Revision$
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*/
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package java.awt;
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import org.apache.harmony.awt.wtk.NativeEvent;
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import org.apache.harmony.awt.wtk.NativeEventQueue;
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class EventDispatchThread extends Thread {
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private static final class MarkerEvent extends AWTEvent {
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MarkerEvent(Object source, int id) {
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super(source, id);
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}
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}
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final Dispatcher dispatcher;
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final Toolkit toolkit;
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private NativeEventQueue nativeQueue;
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protected volatile boolean shutdownPending = false;
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/**
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* Initialise and run the main event loop
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*/
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@Override
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public void run() {
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nativeQueue = toolkit.getNativeEventQueue();
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try {
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runModalLoop(null);
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} finally {
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toolkit.shutdownWatchdog.forceShutdown();
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}
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}
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void runModalLoop(ModalContext context) {
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long lastPaintTime = System.currentTimeMillis();
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while (!shutdownPending && (context == null || context.isModalLoopRunning())) {
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try {
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EventQueue eventQueue = toolkit.getSystemEventQueueImpl();
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NativeEvent ne = nativeQueue.getNextEvent();
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if (ne != null) {
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dispatcher.onEvent(ne);
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MarkerEvent marker = new MarkerEvent(this, 0);
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eventQueue.postEvent(marker);
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for (AWTEvent ae = eventQueue.getNextEventNoWait();
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(ae != null) && (ae != marker);
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ae = eventQueue.getNextEventNoWait()) {
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eventQueue.dispatchEvent(ae);
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}
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} else {
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toolkit.shutdownWatchdog.setNativeQueueEmpty(true);
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AWTEvent ae = eventQueue.getNextEventNoWait();
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if (ae != null) {
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eventQueue.dispatchEvent(ae);
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long curTime = System.currentTimeMillis();
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if (curTime - lastPaintTime > 10) {
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toolkit.onQueueEmpty();
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lastPaintTime = System.currentTimeMillis();
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}
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} else {
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toolkit.shutdownWatchdog.setAwtQueueEmpty(true);
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toolkit.onQueueEmpty();
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lastPaintTime = System.currentTimeMillis();
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waitForAnyEvent();
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}
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}
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} catch (Throwable t) {
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// TODO: Exception handler should be implemented
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// t.printStackTrace();
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}
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}
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}
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private void waitForAnyEvent() {
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EventQueue eventQueue = toolkit.getSystemEventQueueImpl();
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if (!eventQueue.isEmpty() || !nativeQueue.isEmpty()) {
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return;
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}
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Object eventMonitor = nativeQueue.getEventMonitor();
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synchronized(eventMonitor) {
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try {
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eventMonitor.wait();
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} catch (InterruptedException e) {}
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}
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}
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void shutdown() {
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shutdownPending = true;
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}
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EventDispatchThread(Toolkit toolkit, Dispatcher dispatcher ) {
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this.toolkit = toolkit;
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this.dispatcher = dispatcher;
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setName("AWT-EventDispatchThread"); //$NON-NLS-1$
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setDaemon(true);
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}
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}
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