import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
import java.applet.Applet;
import javax.sound.midi.*;
public class Akordion4 extends JApplet implements MouseListener{
   int algtoon=68; //Ab, akordioni nuppude vasak serv
   int kogus=12;
   int nupuvahe=50;
   int vasak=10;
   int yla=10;
   int nupudiameeter=30;
   final int kvint=7;
   JButton[] nupud=new JButton[kogus];
   Synthesizer synt;
   MidiChannel kanal;
   int valjus=100;
   public Akordion4(){
    try{
     synt=MidiSystem.getSynthesizer();
	 synt.open();
	 kanal=synt.getChannels()[0];
	 getContentPane().setLayout(null);	 
	 for(int i=0; i<kogus; i++){
	    int toon=algtoon+i*kvint;
		while(toon>72){toon-=12;}
	    nupud[i]=new AkordioniNupp(toon);
		nupud[i].setBounds(vasak+i*nupuvahe, yla, 
		   nupudiameeter, nupudiameeter);
		getContentPane().add(nupud[i]);
		nupud[i].addMouseListener(this);
	 }
	} catch(Exception ex){ex.printStackTrace();}
   }

   public void mangiKolmkola(int algnoot){
     kanal.noteOn(algnoot   ,valjus);
     kanal.noteOn(algnoot+4 ,valjus);
     kanal.noteOn(algnoot+7 ,valjus);
   }
   public void mousePressed(MouseEvent e){
      AkordioniNupp nupp=(AkordioniNupp)e.getSource();
	  mangiKolmkola(nupp.kysiPohitoon());
   }
   public void mouseReleased(MouseEvent e){
      kanal.allNotesOff();
   }
   public void mouseClicked(MouseEvent e){}
   public void mouseEntered(MouseEvent e){}
   public void mouseExited(MouseEvent e){}
   public static void main(String[] arg){
     JFrame f=new JFrame();
	 f.add(new Akordion4());
	 f.setSize(300, 300);
	 f.setVisible(true);
   }
}