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/*******************************************************************************
* Copyright (c) 2008 IBM Corporation and others.
*
* This program and the accompanying materials
* are made available under the terms of the Eclipse Public License 2.0
* which accompanies this distribution, and is available at
* https://www.eclipse.org/legal/epl-2.0/
*
* SPDX-License-Identifier: EPL-2.0
*
* Contributors:
* IBM Corporation - initial API and implementation
*******************************************************************************/
package org.eclipse.debug.examples.ui.midi.adapters;
import java.util.Timer;
import java.util.TimerTask;
import org.eclipse.debug.core.DebugEvent;
import org.eclipse.debug.examples.core.midi.launcher.ClockControl;
import org.eclipse.debug.examples.core.midi.launcher.MidiLaunch;
import org.eclipse.debug.internal.ui.viewers.model.provisional.IModelDelta;
import org.eclipse.debug.internal.ui.viewers.model.provisional.ModelDelta;
import org.eclipse.debug.internal.ui.viewers.update.DebugEventHandler;
/**
* Listens to events from sequencer controls and fires corresponding
* deltas to update the viewer.
*
* @since 1.0
*/
public class ControlEventHandler extends DebugEventHandler {
/**
* Associated launch
*/
private MidiLaunch fLaunch;
/**
* Timer used to update clock
*/
private Timer fTimer;
/**
* @param proxy
*/
public ControlEventHandler(SequencerControlsModelProxy proxy) {
super(proxy);
fLaunch = proxy.getMidiLaunch();
}
protected void init() {
if (!fLaunch.isSuspended() && !fLaunch.isTerminated() && !fLaunch.isDisconnected()) {
startTimer();
}
}
/* (non-Javadoc)
* @see org.eclipse.debug.internal.ui.viewers.update.DebugEventHandler#handlesEvent(org.eclipse.debug.core.DebugEvent)
*/
@Override
protected boolean handlesEvent(DebugEvent event) {
return true;
}
/* (non-Javadoc)
* @see org.eclipse.debug.internal.ui.viewers.update.DebugEventHandler#dispose()
*/
@Override
public synchronized void dispose() {
super.dispose();
if (fTimer != null) {
fTimer.cancel();
}
}
/* (non-Javadoc)
* @see org.eclipse.debug.internal.ui.viewers.update.DebugEventHandler#refreshRoot(org.eclipse.debug.core.DebugEvent)
*/
@Override
protected void refreshRoot(DebugEvent event) {
ModelDelta delta = new ModelDelta(fLaunch, IModelDelta.CONTENT);
fireDelta(delta);
}
/* (non-Javadoc)
* @see org.eclipse.debug.internal.ui.viewers.update.DebugEventHandler#handleResume(org.eclipse.debug.core.DebugEvent)
*/
@Override
protected void handleResume(DebugEvent event) {
super.handleResume(event);
startTimer();
}
/**
* Starts a timer to update the clock
*/
private void startTimer() {
fTimer = new Timer(true);
fTimer.schedule(new TimerTask() {
@Override
public void run() {
ModelDelta delta = new ModelDelta(fLaunch, IModelDelta.NO_CHANGE);
delta = delta.addNode(new ClockControl(fLaunch), IModelDelta.STATE | IModelDelta.CONTENT);
fireDelta(delta);
}
}, 0, 100);
}
/* (non-Javadoc)
* @see org.eclipse.debug.internal.ui.viewers.update.DebugEventHandler#handleSuspend(org.eclipse.debug.core.DebugEvent)
*/
@Override
protected void handleSuspend(DebugEvent event) {
super.handleSuspend(event);
if (fTimer != null) {
fTimer.cancel();
fTimer = null;
}
}
}
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