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 album extends Applet{
    Button btnPrev;
    Button btnNext;
    Button btnFirst;
    Button btnLast;
    Label lblTitle;
    Panel myPanel;

    Image[] myImg;
    String[] myComment;
    double w,h;
    String s;
    int crntNo;
    int maxNo;

    public void init(){
      int count;
      maxNo = Integer.parseInt(getParameter("no"));
      myImg = new Image[maxNo];
      myComment = new String[maxNo];
      crntNo = 0;
//    画像を取得する//
      MediaTracker mt = new MediaTracker(this);
      for (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){}
      }
//    頭出しボタンの作成//
      btnFirst = new Button("＜＜");
      btnFirst.addActionListener(new ActionListener(){
        public void actionPerformed(ActionEvent e){
        crntNo = 0;
        repaint();
        }
      });
//    巻き戻しボタンの作成//
      btnPrev = new Button("＜");
      btnPrev.addActionListener(new ActionListener(){
        public void actionPerformed(ActionEvent e){
          if (crntNo > 0) crntNo = crntNo - 1;
          repaint();
        }
      });
//    早送りボタンの作成//
      btnNext = new Button("＞");
      btnNext.addActionListener(new ActionListener(){
        public void actionPerformed(ActionEvent e){
          if (crntNo <maxNo - 1) crntNo = crntNo + 1;
          repaint();
        }
      });
//    尻尾出しボタンの作成//
      btnLast = new Button("＞＞");
      btnLast.addActionListener(new ActionListener(){
        public void actionPerformed(ActionEvent e){
        crntNo = maxNo-1;
        repaint();
        }
      });
//    ボタンの定義//
      lblTitle = new Label("",Label.CENTER);
      myPanel = new Panel();
      myPanel.setLayout(new GridLayout(1,4));

      myPanel.add(btnFirst);
      myPanel.add(btnPrev);
      myPanel.add(btnNext);
      myPanel.add(btnLast);
      setLayout(new BorderLayout());
      add ("North",lblTitle);
      add ("South",myPanel);
    }
 
//  画像の表示//
    public void paint(Graphics g) {
      Dimension d = getSize(); // アプレットサイズの取得
      w=myImg[crntNo].getWidth(this); // 画像の幅を取得
      h=myImg[crntNo].getHeight(this); // 画像の高さを取得
      g.drawImage(myImg[crntNo],(int)(d.width-w)/2,(int)(d.height-h)/2,this) ; 
      lblTitle.setText("No."+(crntNo+1) + ":"+ myComment[crntNo]);
    }
}