/*
* RawGazeHandler.java
*
* Copyright (c) 2010, Ralf Biedert, DFKI. All rights reserved.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
* MA 02110-1301 USA
*
*/
package de.dfki.km.text20.browserplugin.services.mastergazehandler.impl.gazehandler.simple;
import java.awt.Point;
import java.util.List;
import de.dfki.km.text20.browserplugin.services.mastergazehandler.impl.gazehandler.AbstractGazeHandler;
import de.dfki.km.text20.services.evaluators.gaze.GazeEvaluator;
import de.dfki.km.text20.services.evaluators.gaze.listenertypes.raw.RawDataEvent;
import de.dfki.km.text20.services.evaluators.gaze.listenertypes.raw.RawDataListener;
import de.dfki.km.text20.services.pseudorenderer.CoordinatesType;
import de.dfki.km.text20.services.pseudorenderer.PseudorendererStatus;
import de.dfki.km.text20.services.trackingdevices.eyes.EyeTrackingEvent;
/**
*
* @author rb
*/
public class ReducedApplicationGazeHandler extends AbstractGazeHandler {
int i;
@SuppressWarnings("boxing")
protected void handleEvent(final EyeTrackingEvent event) {
if (this.reducedCommunication) return;
final List<String> handler = this.masterGazeHandler.getHandlerForType("reducedApplicationGaze");
if (handler.size() == 0) return;
// If the element is not visible, don't do anything
if (!this.pseudorenderer.getStatus().contains(PseudorendererStatus.VISIBLE))
return;
// Update the filter and use the filters point
final Point p = event.getGazeCenter();
// Find what's below the gaze
final Point dp = this.pseudorenderer.convertPoint(p, CoordinatesType.SCREEN_BASED, CoordinatesType.DOCUMENT_BASED);
if (dp == null) return;
// Call only every 2nd turn (improves performance)
if (this.i++ % 2 == 0) return;
// Execute all handler
for (final String h : handler) {
this.browserPlugin.executeJSFunction(h, dp.x, dp.y);
}
}
/* (non-Javadoc)
* @see de.dfki.km.augmentedtext.browserplugin.services.mastergazehandler.impl.gazehandler.AbstractGazeHandler#registerToEvaluator(de.dfki.km.augmentedtext.services.gazeevaluator.GazeEvaluator)
*/
@Override
protected void registerToEvaluator(final GazeEvaluator evaluator) {
evaluator.addEvaluationListener(new RawDataListener() {
@Override
public void newEvaluationEvent(final RawDataEvent event) {
handleEvent(event.getTrackingEvent());
}
@Override
public boolean requireUnfilteredEvents() {
return false;
}
});
}
}