/** Copyright by Barry G. Becker, 2000-2011. Licensed under MIT License: http://www.opensource.org/licenses/MIT */
package com.barrybecker4.simulation.common.ui;
import com.barrybecker4.ui.animation.AnimationFrame;
import com.barrybecker4.ui.renderers.HistogramRenderer;
import java.awt.*;
import java.util.Random;
/**
* Simulates the the generation of a histogram based on
* some stochastic process.
*
* @author Barry Becker
*/
public abstract class DistributionSimulator extends Simulator {
private static final double TIME_STEP = 1.0;
private static final int DEFAULT_STEPS_PER_FRAME = 100;
protected HistogramRenderer histogram_;
protected int[] data_;
/** Seeded Random variable so results are reproducible. */
protected Random random_ = new Random(0);
/** Constructor */
public DistributionSimulator(String title) {
super(title);
commonInit();
}
@Override
protected void reset() {
initHistogram();
}
protected abstract void initHistogram();
private void commonInit() {
initCommonUI();
setNumStepsPerFrame(DEFAULT_STEPS_PER_FRAME);
this.setPreferredSize(new Dimension( 600, 500 ));
}
@Override
protected abstract SimulatorOptionsDialog createOptionsDialog();
@Override
protected double getInitialTimeStep() {
return TIME_STEP;
}
@Override
public double timeStep() {
if ( !isPaused() ) {
histogram_.increment(getXPositionToIncrement());
}
return timeStep_;
}
/**
* @return An x value to add to the histogram.
* The histogram itself will convert it to the correct x axis bin location.
*/
protected abstract double getXPositionToIncrement();
@Override
public void paint( Graphics g ) {
histogram_.setSize(getWidth(), getHeight());
histogram_.paint(g);
}
protected static void runSimulation(DistributionSimulator simulator) {
simulator.setPaused(false);
new AnimationFrame( simulator );
}
}