import java.applet.Applet;
import java.awt.*;
import java.awt.event.*;
//****************************************************************
//html Interface;
//<APPLET CODE="Album.class" WIDTH=200" HEIGHT="250">
//  <PARAM NAME="no" VALUE="ファイル数">
//  <PARAM NAME="file" VALUE="タイトル,ファイル名">
//</APPLET>
//****************************************************************/
public class album4 extends Applet implements ActionListener,
                                   Runnable,AdjustmentListener {
    Thread myth;
    Button btnAon = new Button("自動");
    Button btnAoff = new Button("停止");
    Scrollbar sb    = new Scrollbar(Scrollbar.HORIZONTAL,1,1,0,14);
    Scrollbar sb1   = new Scrollbar(Scrollbar.HORIZONTAL,1,1,1,10);
    Label lblTitle;
    Panel myPanel;
    GridBagLayout gb = new GridBagLayout();
    GridBagConstraints gbc = new GridBagConstraints();

    Image[] myImg;
    String[] myComment;
    double w,h;
    String s;
    int crntNo;
    int maxNo;
    int t = 1;
    int f = 0;
    public void init(){
      maxNo = Integer.parseInt(getParameter("no"));
      myImg = new Image[maxNo];
      myComment = new String[maxNo];
      crntNo = 0;
      MediaTracker mt = new MediaTracker(this);
      for (int count =0; count < maxNo; count++){
        s = getParameter("file"+count);
        myComment[count] = s.substring(0,s.indexOf(','));
        myImg[count] = getImage(getDocumentBase(),s.substring(s.indexOf(',')+1,s.length()));
        mt.addImage(myImg[count], 0);
        try{mt.waitForAll();}
        catch (InterruptedException e1){}
      }
      sb = new Scrollbar(Scrollbar.HORIZONTAL,0,1,0,maxNo);
      lblTitle = new Label("",Label.CENTER);
      setLayout(gb);
      gbc.fill = GridBagConstraints.HORIZONTAL;
      gbc.weightx = 20;
      gb.setConstraints(sb,gbc);
      gbc.weightx = 1;
      gb.setConstraints(btnAon,gbc);
      gbc.weightx = 1;
      gb.setConstraints(btnAoff,gbc);
      gbc.weightx = 1;
      gb.setConstraints(sb1,gbc);
      myPanel = new Panel();
      myPanel.setLayout(gb);
      myPanel.add(sb);
      myPanel.add(btnAon);
      myPanel.add(btnAoff);
      myPanel.add(sb1);
      setLayout(new BorderLayout());
      add ("North",lblTitle);
      add ("South",myPanel);
      sb.setUnitIncrement(1);
      sb.setBlockIncrement(3);
      sb1.setUnitIncrement(1);
      sb1.setBlockIncrement(1);
      sb.addAdjustmentListener(this);
      sb1.addAdjustmentListener(this);
      btnAon.addActionListener(this);
      btnAoff.addActionListener(this);
    }
    public void adjustmentValueChanged(AdjustmentEvent r){
      if(r.getSource()==sb){
        crntNo = sb.getValue();
        repaint();
      }
      if(r.getSource()==sb1){
        t = sb1.getValue();
      }
    }
    public void actionPerformed(ActionEvent e) {
      if(e.getSource() == btnAon  ){f=1;}
      if(e.getSource() == btnAoff ){f=0;}
    }
    public void start(){
      if (myth == null){
        myth = new Thread(this);
        myth.start();
      }
    }
    public void stop() {
      if (myth != null){
//      myth.stop();
        myth = null;
      }
    }
    public void destroy() {}
    public void run(){
      while (true) {
        try{myth.sleep(1000*t);}
        catch(InterruptedException q){}
        if (f !=0) {   
          if (crntNo <maxNo - 1) {crntNo = crntNo + 1;}
            else {crntNo = 0;}
          sb.setValue(crntNo);
          repaint();
        }
      }
    }
    public void paint(Graphics g) {
      Dimension d = getSize();
      w=myImg[crntNo].getWidth(this);
      h=myImg[crntNo].getHeight(this);
      g.drawImage(myImg[crntNo],(int)(d.width-w)/2,(int)(d.height-h)/2,this) ; 
      lblTitle.setText("No."+(crntNo+1) + ":"+ myComment[crntNo]);
    }
}