import java.awt.*;
import java.util.*;
import java.applet.*;
import graph.*;
/*************************************************************************
**
**    Applet datainc
**    T. W. Shattuck Colby College              Version 1.0   July 2003
**
**************************************************************************
**    Based on example1.java and the 2D graph
**     Java classes by Leigh Brookshaw (1996)
**
**    This program is free software; you can redistribute it and/or modify
**    it under the terms of the GNU General Public License as published by
**    the Free Software Foundation; either version 2 of the License, or
**    (at your option) any later version.
**
**    This program is distributed in the hope that it will be useful,
**    but WITHOUT ANY WARRANTY; without even the implied warranty of
**    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
**    GNU General Public License for more details.
**
**    You should have received a copy of the GNU General Public License
**    along with this program; if not, write to the Free Software
**    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
**************************************************************************
**
**    The first data set is loaded from the PARAM tag DATA of the calling html,
**    the second data set is loaded form the PARAM tag FUNCTION with the
**    starting x value = minimum and then in equal increments.
**    The first data set is given as a comma delimited string of x and y
**    data pairs. The second data set, the "function", is given as a
**    comma delimited string of y values only.
**
*************************************************************************/

public class datainc extends Applet {

      Graph2D graph;
      DataSet data1;
      DataSet data2;
      Axis    xaxis;
      Axis    yaxis;
      Markers markers;
      double data[];
      int np = 500;
      int npd ;


      public void init() {
	double xf ;
        int count = 0;
        boolean error = false;
        double data[] = new double[2*np];
/*
**      Get the passed parameters
*/

         String datastr = getParameter("data") ;
         String fcnstr = getParameter("function") ; 
         double minimum = Float.parseFloat(getParameter("minimum")); 
         double increment = Float.parseFloat(getParameter("increment")); 
         String xlabel = getParameter("xlabel") ;
         String ylabel = getParameter("ylabel") ;

/*
**      Create the Graph instance and modify the default behaviour
*/
        graph = new Graph2D();
        graph.drawzero = false;
        graph.drawgrid = false;
        graph.setGraphBackground(new Color(255,255,255));
/*
**      Marker definitions
*/
           markers = new Markers();
	   /*
	   ** add square marker to the marker list
           */
           int x[] = new int[5];
           int y[] = new int[5];
           boolean d[] = new boolean[5];
           x[0]=-2;  y[0]= 2;  d[0]=false;
           x[1]= 2;  y[1]= 2;  d[1]=true;
           x[2]= 2;  y[2]= -2; d[2]=true;
           x[3]= -2; y[3]=-2;  d[3]=true;
           x[4]=-2;  y[4]= 2;  d[4]=true;

           markers.AddMarker(1,5,d,x,y);
        graph.setMarkers(markers);

        setLayout( new BorderLayout() );
        add("Center", graph);
/*
**      Get the first data Set.
*/
      StringTokenizer en_str =  new StringTokenizer(datastr, ",") ;
           npd = en_str.countTokens() ;
        for(int j=0; j<npd; j+=2) {
            data[j] = Float.parseFloat(en_str.nextToken()) ;
            data[j+1] = Float.parseFloat(en_str.nextToken()) ;
        }
          npd = npd/2 ;
        data1 = graph.loadDataSet(data,npd);
        data1.linestyle = 0;
        data1.marker    = 1;
        data1.markerscale = 1.5;
        data1.markercolor = new Color(0,0,255);
/*
**      Get the second data Set.
*/
      StringTokenizer en_str2 =  new StringTokenizer(fcnstr, ",") ;
           npd = en_str2.countTokens() ;
        for(int j=0; j<npd*2; j+=2) {
            data[j] = minimum + j*increment/2 ;
            data[j+1] = Float.parseFloat(en_str2.nextToken()) ;
        }
 
         if(npd <= 1) {
             this.showStatus("Error NO POINTS to PLOT!"); 
             System.out.println("Error NO POINTS to PLOT!");
             return;
         }

        data2 = graph.loadDataSet(data,npd);
        data2.linecolor   =  new Color(0,255,0);
/*
**      Attach both data sets to the Xaxis
*/
        xaxis = graph.createAxis(Axis.BOTTOM);
        xaxis.attachDataSet(data1);
        xaxis.attachDataSet(data2);
        graph.attachDataSet(data2);
        xaxis.setTitleText(xlabel);
        xaxis.setTitleFont(new Font("TimesRoman",Font.PLAIN,20));
        xaxis.setLabelFont(new Font("Helvetica",Font.PLAIN,15));
/*
**      Attach both data sets
*/
        yaxis = graph.createAxis(Axis.LEFT);
        yaxis.attachDataSet(data1);
        yaxis.attachDataSet(data2);
        yaxis.setTitleText(ylabel);
        yaxis.setTitleFont(new Font("TimesRoman",Font.PLAIN,20));
        yaxis.setLabelFont(new Font("Helvetica",Font.PLAIN,15));
      }

}