/*******************************************************************************
* Copyright (c) 2006, 2009 Wind River Systems 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:
* Wind River Systems - initial API and implementation
*******************************************************************************/
package org.eclipse.cdt.examples.dsf.timers;
import java.util.concurrent.RejectedExecutionException;
import org.eclipse.cdt.dsf.service.DsfServiceEventHandler;
import org.eclipse.cdt.dsf.service.DsfSession;
import org.eclipse.cdt.dsf.ui.viewmodel.AbstractVMAdapter;
import org.eclipse.cdt.dsf.ui.viewmodel.IRootVMNode;
import org.eclipse.cdt.dsf.ui.viewmodel.IVMNode;
import org.eclipse.cdt.dsf.ui.viewmodel.datamodel.AbstractDMVMProvider;
import org.eclipse.cdt.examples.dsf.timers.AlarmService.TriggersChangedEvent;
import org.eclipse.cdt.examples.dsf.timers.TimerService.TimersChangedEvent;
import org.eclipse.debug.internal.ui.viewers.model.provisional.IColumnPresentation;
import org.eclipse.debug.internal.ui.viewers.model.provisional.IPresentationContext;
/**
* The View Model provider for the Timers view. This provider allows for
* switching between two different view layouts:
* <ol>
* <li>Timers -> Triggers -> Alarms</li>
* <li>Triggers -> Timers -> Alarms</li>
* </ol>
* A special event is sent when the layout is changed in order to generate
* a proper delta to refresh the view.
*/
@SuppressWarnings("restriction")
public class TimersVMProvider extends AbstractDMVMProvider {
/** Event indicating that the timers view layout has changed */
public static class TimersViewLayoutChanged {}
/** Enumeration of possible layouts for the timers view model */
public enum ViewLayout { TRIGGERS_AT_TOP, TIMERS_AT_TOP }
/** Have we registered ourselves as a listener for DM events? */
private boolean fRegisteredEventListener;
public TimersVMProvider(AbstractVMAdapter adapter, IPresentationContext presentationContext, DsfSession session) {
super(adapter, presentationContext, session);
// Add ourselves as listener for DM events events.
try {
session.getExecutor().execute(new Runnable() {
public void run() {
if (DsfSession.isSessionActive(getSession().getId())) {
getSession().addServiceEventListener(TimersVMProvider.this, null);
fRegisteredEventListener = true;
}
}
});
} catch (RejectedExecutionException e) {
// Session shut down, not much we can do but wait to be disposed.
}
// Set the initial view layout.
setViewLayout(ViewLayout.TIMERS_AT_TOP);
}
/* (non-Javadoc)
* @see org.eclipse.cdt.dsf.ui.viewmodel.AbstractVMProvider#dispose()
*/
@Override
public void dispose() {
// Remove ourselves as listener for DM events events. In practice, we
// get called after the session has shut down, so we'll end up with a
// RejectedExecutionException. We put this here all the same for
// completeness sake.
try {
getSession().getExecutor().execute(new Runnable() {
public void run() {
if (fRegisteredEventListener && DsfSession.isSessionActive(getSession().getId())) {
getSession().removeServiceEventListener(TimersVMProvider.this);
fRegisteredEventListener = false;
}
}
});
} catch (RejectedExecutionException e) {
// Session shut down, not much we can do but wait to be disposed.
}
super.dispose();
}
/**
* Configures a new layout for the timers view model.
* @param layout New layout to use.
*/
public void setViewLayout(ViewLayout layout) {
clearNodes();
if (layout == ViewLayout.TRIGGERS_AT_TOP) {
IRootVMNode root = new TimersRootVMNode(this);
IVMNode triggersNode = new TriggersVMNode(this, getSession());
addChildNodes(root, new IVMNode[] { triggersNode });
IVMNode timersNode = new TimersVMNode(this, getSession());
addChildNodes(triggersNode, new IVMNode[] { timersNode });
IVMNode alarmNode = new AlarmsVMNode(this, getSession());
addChildNodes(timersNode, new IVMNode[] { alarmNode });
setRootNode(root);
} else if (layout == ViewLayout.TIMERS_AT_TOP) {
IRootVMNode root = new TimersRootVMNode(this);
IVMNode timersNode = new TimersVMNode(this, getSession());
addChildNodes(root, new IVMNode[] { timersNode });
IVMNode triggersNode = new TriggersVMNode(this, getSession());
addChildNodes(timersNode, new IVMNode[] { triggersNode });
IVMNode alarmNode = new AlarmsVMNode(this, getSession());
addChildNodes(triggersNode, new IVMNode[] { alarmNode });
setRootNode(root);
}
handleEvent(new TimersViewLayoutChanged());
}
@Override
public IColumnPresentation createColumnPresentation(IPresentationContext context, Object element) {
return new TimersViewColumnPresentation();
}
@Override
public String getColumnPresentationId(IPresentationContext context, Object element) {
return TimersViewColumnPresentation.ID;
}
// Add a handler for the triggers and timers changed events. The
// AbstractDMVMProvider superclass automatically registers this provider
// for all IDMEvent events, however these two events do not implement
// IDMEvent
@DsfServiceEventHandler
public void eventDispatched(final TriggersChangedEvent event) {
if (isDisposed()) return;
try {
getExecutor().execute(new Runnable() {
public void run() {
if (isDisposed()) return;
handleEvent(event);
}
});
} catch (RejectedExecutionException e) {}
}
@DsfServiceEventHandler
public void eventDispatched(final TimersChangedEvent event) {
if (isDisposed()) return;
try {
getExecutor().execute(new Runnable() {
public void run() {
if (isDisposed()) return;
handleEvent(event);
}
});
} catch (RejectedExecutionException e) {}
}
}