?? plotpanel.java
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import java.awt.*;
import java.awt.event.*;
import java.util.*;
//swing classes
import com.sun.java.swing.text.*;
import com.sun.java.swing.*;
import com.sun.java.swing.event.*;
//--------------------------------------------
public class PlotPanel extends JPanel
{
float xfactor, yfactor;
int xpmin, ypmin, xpmax, ypmax;
float minX, maxX, minY, maxY;
float x[], y[];
Color color;
//--------------------------------------------
public void setBounds(float minx, float miny, float maxx, float maxy)
{
minX=minx;
maxX= maxx;
minY=miny;
maxY = maxy;
}
//--------------------------------------------
public void plot(float[] xp, float[] yp, Color c)
{
x = xp; //copy in the arrays
y = yp;
color = c; //and color
//compute bounds and sclaing factors
int w = getWidth() - getInsets().left - getInsets().right;
int h = getHeight() - getInsets().top - getInsets().bottom;
xfactor = (0.9f * w) / (maxX - minX);
yfactor = (0.9f * h)/ (maxY - minY);
xpmin = (int)(0.05f * w);
ypmin = (int)(0.05f * h);
xpmax = w - xpmin;
ypmax = h - ypmin;
repaint(); //this causes the actual plot
}
//--------------------------------------
protected int calcx(float xp)
{
return (int)((xp-minX) * xfactor + xpmin);
}
//--------------------------------------
protected int calcy(float yp)
{
int ypnt = (int)((yp-minY) * yfactor);
return ypmax - ypnt;
}
}
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