Transistor.JFETGraphViewer.java Source code

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Here is the source code for Transistor.JFETGraphViewer.java

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/*
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 * To change this template file, choose Tools | Templates
 * and open the template in the editor.
 */
package Transistor;

import java.awt.Graphics;
import static java.lang.Math.PI;
import static java.lang.Math.sqrt;
import org.jfree.chart.ChartFactory;
import org.jfree.chart.ChartPanel;
import org.jfree.chart.JFreeChart;
import org.jfree.chart.annotations.XYPointerAnnotation;
import org.jfree.chart.plot.PlotOrientation;
import org.jfree.chart.plot.XYPlot;
import org.jfree.data.xy.XYSeries;
import org.jfree.data.xy.XYSeriesCollection;

/**
 *
 * @author Geonmo
 */
public class JFETGraphViewer extends ChartPanel {
    TransistorInfo info;
    JFreeChart chart;
    XYSeries s;
    XYSeriesCollection data;
    XYPointerAnnotation pointer;

    /**
     * Creates new form JFETGraphViewer
     * @param chart
     */
    public JFETGraphViewer(JFreeChart chart) {
        super(chart);
        s = new XYSeries("JFET_Current(I_D)");
        data = new XYSeriesCollection();
        data.addSeries(s);
        info = TransistorInfo.getInstacne();
        this.makeNewSeries();

        initComponents();

        //this.chart = ChartFactory.createXYLineChart("Output characteristic V-I curves","V_ds","I_d",data,PlotOrientation.VERTICAL,true,true,false);        
        //pointer = new XYPointerAnnotation("This point",info.getVds(), getDrainCurrent(info.getVds()), PI/4.0);
        //XYPlot plot = (XYPlot)chart.getPlot();
        //plot.addAnnotation(pointer);                

    }

    public void makeNewSeries() {
        s.clear();
        for (int i = 0; i < 50; i++) {
            s.add(i, getDrainCurrent(i));
            //System.out.printf("%d %f\n",i,getDrainCurrent(i));
        }
    }

    public double getDrainCurrent(double Vds) {
        //int Vds = info.getVds();
        int Vgs = info.getVgs();
        int Vpoff = info.getPinchOff();

        double I_d = 0.0;
        double I_dss = 2000;

        // Channel-Off(or pinch-off) region.  I_drain must be 0,
        if (Vgs < Vpoff) {
            I_d = 0.0;
        } else {
            int Vsat = Vgs - Vpoff;
            // If Vds is ohmic region,
            if (Vds < Vsat) {
                I_d = 2 * I_dss / (Vpoff * Vpoff) * (Vgs - Vpoff - Vds / 2.0) * Vds;
            }
            // If Vds is saturation region,
            else if (Vds >= Vsat) {
                double a_value = 1 - (double) Vgs / (double) Vpoff;
                I_d = I_dss * a_value * a_value;
            }

        }
        return I_d;

    }

    public void printInformation() {
        System.out.printf("This messaage come from 2Dviwer. Vds is %d\n", info.getVds());
        System.out.printf("This messaage come from 2Dviwer. Vgs is %d\n", info.getVgs());
        System.out.printf("This messaage come from 2Dviwer. V_p is %d\n", info.getPinchOff());
        System.out.printf("This messaage come from 2Dviwer. V_th is %d\n", info.getThreshold());
    }

    public JFreeChart getResultChart() {
        this.makeNewSeries();

        this.chart = ChartFactory.createXYLineChart("Output characteristic V-I curves", "V_ds", "I_d", data,
                PlotOrientation.VERTICAL, true, true, false);
        XYPlot plot = (XYPlot) chart.getPlot();
        plot.getRangeAxis().setRange(0, 2100);
        pointer = new XYPointerAnnotation("V_ds", info.getVds(), getDrainCurrent(info.getVds()), PI / 4.0);
        plot.getAnnotations().clear();
        plot.addAnnotation(pointer);

        return this.chart;
    }

    public void paintComponent(Graphics g) {
        super.paintComponent(g);
        System.out.println("Calling!!");
        if (info.isChanged()) {
            this.chart = this.getResultChart();
            this.setChart(this.chart);
            info.appliedChanged();
        }

    }

    /**
     * This method is called from within the constructor to initialize the form.
     * WARNING: Do NOT modify this code. The content of this method is always
     * regenerated by the Form Editor.
     */
    @SuppressWarnings("unchecked")
    // <editor-fold defaultstate="collapsed" desc="Generated Code">//GEN-BEGIN:initComponents
    private void initComponents() {

        javax.swing.GroupLayout layout = new javax.swing.GroupLayout(this);
        this.setLayout(layout);
        layout.setHorizontalGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING).addGap(0,
                400, Short.MAX_VALUE));
        layout.setVerticalGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING).addGap(0, 300,
                Short.MAX_VALUE));
    }// </editor-fold>//GEN-END:initComponents

    // Variables declaration - do not modify//GEN-BEGIN:variables
    // End of variables declaration//GEN-END:variables
}