org.fhcrc.cpl.toolbox.gui.chart.CrosshairChangeListener.java Source code

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Here is the source code for org.fhcrc.cpl.toolbox.gui.chart.CrosshairChangeListener.java

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/*
 * Copyright (c) 2003-2012 Fred Hutchinson Cancer Research Center
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.fhcrc.cpl.toolbox.gui.chart;

import org.apache.log4j.Logger;
import org.jfree.chart.event.ChartProgressListener;
import org.jfree.chart.event.ChartProgressEvent;

/**
 * Convenience class for only getting updates when Crosshair values change.  Add this as a ChartProgressListener
 */
public abstract class CrosshairChangeListener implements ChartProgressListener {
    protected static Logger _log = Logger.getLogger(CrosshairChangeListener.class);

    protected double domainValue = Double.NaN;
    protected double rangeValue = Double.NaN;

    public void chartProgress(ChartProgressEvent event) {
        if (event.getType() != ChartProgressEvent.DRAWING_FINISHED)
            return;
        double newDomainValue = event.getChart().getXYPlot().getDomainCrosshairValue();
        double newRangeValue = event.getChart().getXYPlot().getRangeCrosshairValue();

        if (domainValue != newDomainValue || rangeValue != newRangeValue) {
            domainValue = newDomainValue;
            rangeValue = newRangeValue;
            crosshairValueChanged(event);
        }
    }

    public abstract void crosshairValueChanged(ChartProgressEvent event);
}