author | azvegint |
Thu, 31 Aug 2017 09:28:21 +0530 | |
changeset 47192 | d46b91465a81 |
parent 37550 | c8252b8fea3d |
permissions | -rw-r--r-- |
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/* |
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* Copyright (c) 1996, 2015, Oracle and/or its affiliates. All rights reserved. |
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
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* |
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* This code is free software; you can redistribute it and/or modify it |
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* under the terms of the GNU General Public License version 2 only, as |
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* published by the Free Software Foundation. Oracle designates this |
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* particular file as subject to the "Classpath" exception as provided |
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* by Oracle in the LICENSE file that accompanied this code. |
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* |
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* This code is distributed in the hope that it will be useful, but WITHOUT |
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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* version 2 for more details (a copy is included in the LICENSE file that |
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* accompanied this code). |
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* |
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* You should have received a copy of the GNU General Public License version |
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* 2 along with this work; if not, write to the Free Software Foundation, |
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
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* |
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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* or visit www.oracle.com if you need additional information or have any |
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* questions. |
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*/ |
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package java.awt; |
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import java.awt.event.MouseEvent; |
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import java.awt.event.ActionEvent; |
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import java.awt.event.WindowEvent; |
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import java.util.ArrayList; |
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import sun.util.logging.PlatformLogger; |
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import sun.awt.dnd.SunDragSourceContextPeer; |
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/** |
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* EventDispatchThread is a package-private AWT class which takes |
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* events off the EventQueue and dispatches them to the appropriate |
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* AWT components. |
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* |
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* The Thread starts a "permanent" event pump with a call to |
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* pumpEvents(Conditional) in its run() method. Event handlers can choose to |
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* block this event pump at any time, but should start a new pump (<b>not</b> |
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* a new EventDispatchThread) by again calling pumpEvents(Conditional). This |
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* secondary event pump will exit automatically as soon as the Conditional |
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* evaluate()s to false and an additional Event is pumped and dispatched. |
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* |
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* @author Tom Ball |
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* @author Amy Fowler |
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* @author Fred Ecks |
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* @author David Mendenhall |
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* |
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* @since 1.1 |
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*/ |
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class EventDispatchThread extends Thread { |
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private static final PlatformLogger eventLog = PlatformLogger.getLogger("java.awt.event.EventDispatchThread"); |
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private EventQueue theQueue; |
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private volatile boolean doDispatch = true; |
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private static final int ANY_EVENT = -1; |
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private ArrayList<EventFilter> eventFilters = new ArrayList<EventFilter>(); |
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/** |
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* Must always call 5 args super-class constructor passing false |
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* to indicate not to inherit locals. |
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*/ |
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private EventDispatchThread() { |
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throw new UnsupportedOperationException("Must erase locals"); |
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} |
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EventDispatchThread(ThreadGroup group, String name, EventQueue queue) { |
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super(group, null, name, 0, false); |
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setEventQueue(queue); |
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} |
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/* |
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* Must be called on EDT only, that's why no synchronization |
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*/ |
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public void stopDispatching() { |
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doDispatch = false; |
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} |
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public void run() { |
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try { |
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pumpEvents(new Conditional() { |
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public boolean evaluate() { |
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return true; |
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} |
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}); |
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} finally { |
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getEventQueue().detachDispatchThread(this); |
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} |
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} |
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void pumpEvents(Conditional cond) { |
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pumpEvents(ANY_EVENT, cond); |
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} |
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void pumpEventsForHierarchy(Conditional cond, Component modalComponent) { |
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pumpEventsForHierarchy(ANY_EVENT, cond, modalComponent); |
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} |
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void pumpEvents(int id, Conditional cond) { |
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pumpEventsForHierarchy(id, cond, null); |
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} |
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void pumpEventsForHierarchy(int id, Conditional cond, Component modalComponent) { |
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pumpEventsForFilter(id, cond, new HierarchyEventFilter(modalComponent)); |
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} |
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void pumpEventsForFilter(Conditional cond, EventFilter filter) { |
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pumpEventsForFilter(ANY_EVENT, cond, filter); |
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} |
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void pumpEventsForFilter(int id, Conditional cond, EventFilter filter) { |
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addEventFilter(filter); |
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doDispatch = true; |
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while (doDispatch && !isInterrupted() && cond.evaluate()) { |
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pumpOneEventForFilters(id); |
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} |
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removeEventFilter(filter); |
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} |
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void addEventFilter(EventFilter filter) { |
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if (eventLog.isLoggable(PlatformLogger.Level.FINEST)) { |
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eventLog.finest("adding the event filter: " + filter); |
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} |
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synchronized (eventFilters) { |
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if (!eventFilters.contains(filter)) { |
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if (filter instanceof ModalEventFilter) { |
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ModalEventFilter newFilter = (ModalEventFilter)filter; |
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int k = 0; |
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for (k = 0; k < eventFilters.size(); k++) { |
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EventFilter f = eventFilters.get(k); |
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if (f instanceof ModalEventFilter) { |
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ModalEventFilter cf = (ModalEventFilter)f; |
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if (cf.compareTo(newFilter) > 0) { |
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break; |
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} |
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} |
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} |
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eventFilters.add(k, filter); |
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} else { |
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eventFilters.add(filter); |
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} |
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} |
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} |
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} |
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void removeEventFilter(EventFilter filter) { |
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if (eventLog.isLoggable(PlatformLogger.Level.FINEST)) { |
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eventLog.finest("removing the event filter: " + filter); |
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} |
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synchronized (eventFilters) { |
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eventFilters.remove(filter); |
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} |
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} |
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boolean filterAndCheckEvent(AWTEvent event) { |
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boolean eventOK = true; |
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synchronized (eventFilters) { |
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for (int i = eventFilters.size() - 1; i >= 0; i--) { |
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EventFilter f = eventFilters.get(i); |
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EventFilter.FilterAction accept = f.acceptEvent(event); |
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if (accept == EventFilter.FilterAction.REJECT) { |
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eventOK = false; |
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break; |
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} else if (accept == EventFilter.FilterAction.ACCEPT_IMMEDIATELY) { |
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break; |
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} |
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} |
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} |
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return eventOK && SunDragSourceContextPeer.checkEvent(event); |
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} |
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void pumpOneEventForFilters(int id) { |
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AWTEvent event = null; |
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boolean eventOK = false; |
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try { |
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EventQueue eq = null; |
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do { |
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// EventQueue may change during the dispatching |
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eq = getEventQueue(); |
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event = (id == ANY_EVENT) ? eq.getNextEvent() : eq.getNextEvent(id); |
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eventOK = filterAndCheckEvent(event); |
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if (!eventOK) { |
194 |
event.consume(); |
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} |
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196 |
} |
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197 |
while (eventOK == false); |
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if (eventLog.isLoggable(PlatformLogger.Level.FINEST)) { |
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eventLog.finest("Dispatching: " + event); |
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} |
202 |
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eq.dispatchEvent(event); |
2 | 204 |
} |
205 |
catch (ThreadDeath death) { |
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doDispatch = false; |
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throw death; |
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} |
209 |
catch (InterruptedException interruptedException) { |
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doDispatch = false; // AppContext.dispose() interrupts all |
211 |
// Threads in the AppContext |
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2 | 212 |
} |
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catch (Throwable e) { |
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processException(e); |
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} |
216 |
} |
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private void processException(Throwable e) { |
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if (eventLog.isLoggable(PlatformLogger.Level.FINE)) { |
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eventLog.fine("Processing exception: " + e); |
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} |
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getUncaughtExceptionHandler().uncaughtException(this, e); |
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} |
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public synchronized EventQueue getEventQueue() { |
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return theQueue; |
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} |
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public synchronized void setEventQueue(EventQueue eq) { |
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theQueue = eq; |
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} |
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232 |
private static class HierarchyEventFilter implements EventFilter { |
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233 |
private Component modalComponent; |
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234 |
public HierarchyEventFilter(Component modalComponent) { |
|
235 |
this.modalComponent = modalComponent; |
|
236 |
} |
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237 |
public FilterAction acceptEvent(AWTEvent event) { |
|
238 |
if (modalComponent != null) { |
|
239 |
int eventID = event.getID(); |
|
240 |
boolean mouseEvent = (eventID >= MouseEvent.MOUSE_FIRST) && |
|
241 |
(eventID <= MouseEvent.MOUSE_LAST); |
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242 |
boolean actionEvent = (eventID >= ActionEvent.ACTION_FIRST) && |
|
243 |
(eventID <= ActionEvent.ACTION_LAST); |
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244 |
boolean windowClosingEvent = (eventID == WindowEvent.WINDOW_CLOSING); |
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245 |
/* |
|
246 |
* filter out MouseEvent and ActionEvent that's outside |
|
247 |
* the modalComponent hierarchy. |
|
248 |
* KeyEvent is handled by using enqueueKeyEvent |
|
249 |
* in Dialog.show |
|
250 |
*/ |
|
251 |
if (Component.isInstanceOf(modalComponent, "javax.swing.JInternalFrame")) { |
|
252 |
/* |
|
253 |
* Modal internal frames are handled separately. If event is |
|
254 |
* for some component from another heavyweight than modalComp, |
|
255 |
* it is accepted. If heavyweight is the same - we still accept |
|
256 |
* event and perform further filtering in LightweightDispatcher |
|
257 |
*/ |
|
258 |
return windowClosingEvent ? FilterAction.REJECT : FilterAction.ACCEPT; |
|
259 |
} |
|
260 |
if (mouseEvent || actionEvent || windowClosingEvent) { |
|
261 |
Object o = event.getSource(); |
|
262 |
if (o instanceof sun.awt.ModalExclude) { |
|
263 |
// Exclude this object from modality and |
|
264 |
// continue to pump it's events. |
|
265 |
return FilterAction.ACCEPT; |
|
266 |
} else if (o instanceof Component) { |
|
267 |
Component c = (Component) o; |
|
268 |
// 5.0u3 modal exclusion |
|
269 |
boolean modalExcluded = false; |
|
270 |
if (modalComponent instanceof Container) { |
|
271 |
while (c != modalComponent && c != null) { |
|
272 |
if ((c instanceof Window) && |
|
273 |
(sun.awt.SunToolkit.isModalExcluded((Window)c))) { |
|
274 |
// Exclude this window and all its children from |
|
275 |
// modality and continue to pump it's events. |
|
276 |
modalExcluded = true; |
|
277 |
break; |
|
278 |
} |
|
279 |
c = c.getParent(); |
|
280 |
} |
|
281 |
} |
|
282 |
if (!modalExcluded && (c != modalComponent)) { |
|
283 |
return FilterAction.REJECT; |
|
284 |
} |
|
285 |
} |
|
286 |
} |
|
287 |
} |
|
288 |
return FilterAction.ACCEPT; |
|
289 |
} |
|
290 |
} |
|
291 |
} |