/**
* Copyright (c) 2009 Dumontierlab
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
package ca.nanometrics.gflot.client.example;
import ca.nanometrics.gflot.client.DataPoint;
import ca.nanometrics.gflot.client.PlotModelStrategy;
import ca.nanometrics.gflot.client.PlotWidget;
import ca.nanometrics.gflot.client.PlotWithOverview;
import ca.nanometrics.gflot.client.PlotWithOverviewModel;
import ca.nanometrics.gflot.client.SeriesHandler;
import ca.nanometrics.gflot.client.options.LineSeriesOptions;
import ca.nanometrics.gflot.client.options.PlotOptions;
import ca.nanometrics.gflot.client.options.PointsSeriesOptions;
import com.google.gwt.core.client.GWT;
import com.google.gwt.user.client.Random;
import com.google.gwt.user.client.Timer;
import com.google.gwt.user.client.rpc.AsyncCallback;
import com.google.gwt.user.client.ui.Button;
import com.google.gwt.user.client.ui.ClickListener;
import com.google.gwt.user.client.ui.FlowPanel;
import com.google.gwt.user.client.ui.HorizontalPanel;
import com.google.gwt.user.client.ui.Widget;
/**
* @author Alexander De Leon
*/
public class DecimationExample implements GFlotExample {
private double previous = 0;
private int timeCounter = 0;
public Widget createExample() {
PlotWithOverviewModel model = new PlotWithOverviewModel(PlotModelStrategy.downSamplingStrategy(20));
PlotOptions plotOptions = new PlotOptions();
plotOptions.setDefaultLineSeriesOptions(new LineSeriesOptions().setLineWidth(1).setShow(true));
plotOptions.setDefaultPointsOptions(new PointsSeriesOptions().setRadius(2).setShow(true));
plotOptions.setDefaultShadowSize(0);
final SeriesHandler series = model.addSeries("Random Series", "#003366");
// create the plot
final PlotWithOverview plot = new PlotWithOverview(model, plotOptions);
// pull the "fake" RPC service for new data
final Timer updater = new Timer() {
@Override
public void run() {
update(series, plot);
}
};
// put it on a panel
FlowPanel panel = new FlowPanel();
panel.add(plot);
HorizontalPanel buttonsPanel = new HorizontalPanel();
buttonsPanel.setSpacing(5);
buttonsPanel.add(new Button("Start", new ClickListener() {
public void onClick(Widget sender) {
updater.scheduleRepeating(1000);
}
}));
buttonsPanel.add(new Button("Stop", new ClickListener() {
public void onClick(Widget sender) {
updater.cancel();
}
}));
panel.add(buttonsPanel);
return panel;
}
public String getName() {
return "Decimation";
}
private void update(final SeriesHandler series, final PlotWidget plot) {
FakeRpcServiceAsync service = getRpcService();
service.getNewData(new AsyncCallback<DataPoint[]>() {
public void onFailure(Throwable caught) {
GWT.log("Something went wrong", caught);
}
public void onSuccess(DataPoint[] result) {
for (DataPoint dataPoint : result) {
series.add(dataPoint);
}
plot.redraw();
}
});
}
private FakeRpcServiceAsync getRpcService() {
return new FakeRpcServiceAsync() {
public void getNewData(final AsyncCallback<DataPoint[]> callback) {
double up = Random.nextDouble();
double down = Random.nextDouble();
callback.onSuccess(new DataPoint[] { new DataPoint(timeCounter++, previous - down),
new DataPoint(timeCounter++, previous + up) });
previous = previous + up;
}
};
}
/** The Async interface of the service */
interface FakeRpcServiceAsync {
void getNewData(AsyncCallback<DataPoint[]> callback);
}
}