/**************************************************************************
/* This class implements a primitive image-viewer.
/*
/* Copyright (c) 2006 by Bernhard Bablok (mail@bablokb.de)
/*
/* 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; see the file COPYING.  If not, write to
/* the Free Software Foundation Inc., 59 Temple Place - Suite 330,
/* Boston, MA  02111-1307 USA
/**************************************************************************/

import java.io.*;
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;

/**
   This class implements a primitive image-viewer.

   @version $Revision: 1.10 $
   @author  $Author: bablokb $
*/

public class ImageViewer extends JFrame {

  public static final int 
    WIDTH = 600,
    HEIGHT = 400;

  //////////////////////////////////////////////////////////////////////////////

  /**
     Image-files.
  */

  private RRArray iFiles = null;

  /**
     Image-Panel.
  */

  private ImagePanel iImagePanel = null;

  /**
     Scroll-pane.
  */

  private JScrollPane iScrollPane = null;

  //////////////////////////////////////////////////////////////////////////////

  /**
     Constructor.
  */

  public ImageViewer(String title, ImagePanel panel) {
    super(title);
    setJMenuBar(getMenu());
    iImagePanel = panel;
    iScrollPane = new JScrollPane((JPanel) iImagePanel);
    getContentPane().add(iScrollPane);
    setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    setLocation(100, 100);
    setVisible(false);
  }

  //////////////////////////////////////////////////////////////////////////////

  /**
     Create JMenuBar.
  */

  private JMenuBar getMenu() {
    JMenu menu = new JMenu("Image");
    menu.add(new JMenuItem(new AbstractAction("Prev") {
	public void actionPerformed(ActionEvent e) {
	  setPrevImage();
	};
      }));
    menu.add(new JMenuItem(new AbstractAction("Next") {
	public void actionPerformed(ActionEvent e) {
	  setNextImage();
	};
      }));
    menu.addSeparator();
    menu.add(new JMenuItem(new AbstractAction("Exit") {
	public void actionPerformed(ActionEvent e) {
	  System.exit(0);
	};
      }));
    
    JMenuBar menuBar = new JMenuBar();
    menuBar.add(menu);
    return menuBar;
  }

  //////////////////////////////////////////////////////////////////////////////

  /**
     Set images to round-robin array.
  */

  protected void setFiles(Object[] obj) {
    iFiles = new RRArray(obj);
  }

  //////////////////////////////////////////////////////////////////////////////

  /**
     Set image-files.
  */

  protected void setImages(String[] filenames) throws IOException {
    Image[] imgArray = new Image[filenames.length];
    for (int i=0;i<filenames.length;++i) {
      imgArray[i] = Toolkit.getDefaultToolkit().getImage(filenames[i]);
    }
    setFiles(imgArray);
  }

  //////////////////////////////////////////////////////////////////////////////

  /**
     Display image.
  */

  protected void setImage(Image img) {
    iImagePanel.setImage(img);
    iScrollPane.getViewport().setViewPosition(new Point(0,0));
  }

  //////////////////////////////////////////////////////////////////////////////

  /**
     Return current image.
  */

  protected Image getImage() {
    return iImagePanel.getImage();
  }

  //////////////////////////////////////////////////////////////////////////////

  /**
     Display previous image.
  */

  protected void setPrevImage() {
    setImage((Image) iFiles.getPrev());
  }

  //////////////////////////////////////////////////////////////////////////////

  /**
     Set image to display.
  */

  protected void setCurrentImage() {
    setImage((Image) iFiles.getCurrent());
  }

  //////////////////////////////////////////////////////////////////////////////

  /**
     Display next image.
  */

  protected void setNextImage() {
    setImage((Image) iFiles.getNext());
  }

  //////////////////////////////////////////////////////////////////////////////

  public static void main(String[] args) {
    if (args.length < 1) {
      System.out.println("usage: java " +
                                   ImageViewer.class.getName() + " file [...]");
      System.exit(3);
    }

    try {
      ImageViewer viewer = 
        new ImageViewer("Simple Image-Viewer",new ImagePanel1());
      viewer.setImages(args);
      viewer.setCurrentImage();
      viewer.pack();
      viewer.setSize(WIDTH,HEIGHT);
      viewer.show();
    } catch (Exception e) {
      e.printStackTrace();
    }
  }
}