import  java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import java.io.*;
import java.util.*; 
import org.xml.sax.*;
import org.xml.sax.helpers.*;
import Acme.JPM.Encoders.GifEncoder;
import javax.xml.parsers.*;

public class Displayxml extends DefaultHandler implements ActionListener

{
    String nomecomando;
    int nr = 0,nsm=0;
    JPanel border=new JPanel(new BorderLayout());
    JFrame frame = new JFrame ("Bad strips display");
    Display disegno = new Display();
    JScrollPane base;
    JButton tasto = new JButton("salva come gif");
    static Displayxml lx;
    int istrip[]=new int[1000];
    Image o;
    Graphics og;
    public Displayxml(){
       lx = this;
     }
    public static void main(String argv[])
    {
       
        if (argv.length != 1) {
            System.err.println("Usage: cmd filename");
            System.exit(1);
        }
        
        // Use an instance of ourselves as the SAX event handler
        DefaultHandler handler = new Displayxml();
        
        // Use the default (non-validating) parser
        SAXParserFactory factory = SAXParserFactory.newInstance();
        try {
            // Set up output stream
            out = new OutputStreamWriter(System.out, "UTF8");
            lx.border.setPreferredSize( new Dimension(400,400));
            lx.frame.setContentPane(lx.border);
            lx.disegno.setPreferredSize( new Dimension(768,800));


            lx.base=new JScrollPane(lx.disegno, 
                JScrollPane.VERTICAL_SCROLLBAR_ALWAYS,               
                JScrollPane.HORIZONTAL_SCROLLBAR_ALWAYS);
            lx.base.setBackground(Color.white);
            lx.border.add(lx.base, BorderLayout.CENTER);
            lx.border.add(lx.tasto, BorderLayout.NORTH);
            lx.tasto.addActionListener(lx);

            lx.frame.pack();
            lx.frame.show();


            // Parse the input
            SAXParser saxParser = factory.newSAXParser();
            saxParser.parse( new File(argv[0]), handler);

        } catch (Throwable t) {
            t.printStackTrace();
        }
//        System.exit(0);
    }

    static private Writer  out;
     public void  actionPerformed(ActionEvent e){
      File outFile=new File("prova2.gif");
            try{
            DataOutputStream dos=new DataOutputStream(new FileOutputStream(outFile));
             GifEncoder encoder = new GifEncoder(lx.o, dos);
             encoder.encode();
             dos.close();
      } catch (Exception ee){
 
              System.out.println(ee.toString());
      }                              

                }
    public void startDocument()
    throws SAXException
    {
    System.out.println("Start Document");
    }

    public void endDocument()
    throws SAXException
    {
    System.out.println("Numero sensori = "+nr);
    }

    public void startElement(String namespaceURI,
                             String lName, // local name
                             String qName, // qualified name
                             Attributes attrs)
    throws SAXException
    {
    String name = lName;
    if ("".equals(name)) name = qName;
      nomecomando = name;
    if(nomecomando.equals("row")){System.out.print(nr+" ");
      if(nsm==0)System.out.println(nsm+" ");
        else {System.out.print(nsm+" ");
        for (int is=0;is<nsm;is++){
         System.out.print(istrip[is]+" ");
}
      System.out.println(" ");
}
nsm=0;nr++;}
    }

    public void endElement(String namespaceURI,
                           String sName, // simple name
                           String qName  // qualified name
                          )
    throws SAXException
    {
    String name = sName;
    if ("".equals(name)) name = qName;
      nomecomando=" ";
    }

 public void characters(char buf[], int offset, int len)
    throws SAXException
    {
        String s = new String(buf, offset, len);
        if(nomecomando.equals("value")&& !(s.equals("null")||s.equals("NULL")))
          {
            StringTokenizer st = new StringTokenizer(s);
             while(st.hasMoreTokens()){
                int strip= new Integer(st.nextToken()).intValue();
                 istrip[nsm]=strip;
                lx.disegno.disegnastrip(nr,strip);nsm++;}
    }
    }


	class Display extends JPanel{
                int xstrip,ystrip;
                public void disegnastrip(int x,int y){xstrip=x;ystrip=y;repaint();}
		public void paintComponent(Graphics g){
            if(lx.o==null){
            lx.o = lx.frame.createImage(lx.disegno.size().width,lx.disegno.size().height);
            lx.og = lx.o.getGraphics();
                lx.og.setColor(Color.white);
                lx.og.fillRect(0,0,disegno.size().width,disegno.size().height);}
                lx.og.setColor(Color.black);
                lx.og.fillRect(xstrip,ystrip,1,1);
                g.drawImage(lx.o,0,0,this);

}
}
}