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/* Demo.java -- And example of MIDI support

   Copyright (C) 2005 Free Software Foundation, Inc.

This file is part of GNU Classpath examples.

GNU Classpath 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, or (at your option)

any later version.

GNU Classpath 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 GNU Classpath; see the file COPYING.  If not, write to the

Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA

02110-1301 USA. */

package gnu.classpath.examples.midi;

import java.awt.*;

import java.awt.event.*;

import java.util.*;

import javax.sound.midi.*;

/**

 * An example how javax.sound.midi facilities work.

 */

public class Demo extends Frame implements ItemListener

{

  Choice midiInChoice = new Choice();

  Choice midiOutChoice = new Choice();

  MidiDevice inDevice = null;

  MidiDevice outDevice = null;

  ArrayList inDevices = new ArrayList();

  ArrayList outDevices = new ArrayList();

  public Demo () throws Exception

  {

    MenuBar mb = new MenuBar ();

    Menu menu = new Menu ("File");

    MenuItem quit = new MenuItem("Quit", new MenuShortcut('Q'));

    quit.addActionListener(new ActionListener()

      {

        public void actionPerformed(ActionEvent e)

        {

          System.exit(0);

        }

      });

    menu.add (quit);

    mb.add(menu);

    setTitle("synthcity: the GNU Classpath MIDI Demo");

    setLayout(new FlowLayout());

    MidiDevice.Info[] infos = MidiSystem.getMidiDeviceInfo();

    for (int i = 0; i < infos.length; i++)

      {

        MidiDevice device = MidiSystem.getMidiDevice(infos[i]);

        if (device.getMaxReceivers() > 0)

          {

            midiOutChoice.addItem(infos[i].getDescription());

            outDevices.add(device);

          }

        if (device.getMaxTransmitters() > 0)

          {

            midiInChoice.addItem(infos[i].getDescription());

            inDevices.add(device);

          }

      }

    setMenuBar (mb);

    add(new Label("MIDI IN: "));

    add(midiInChoice);

    add(new Label("   MIDI OUT: "));

    add(midiOutChoice);

    midiInChoice.addItemListener(this);

    midiOutChoice.addItemListener(this);

    pack();

    show();

  }

  public void itemStateChanged (ItemEvent e)

  {

    try

      {

        if (e.getItemSelectable() == midiInChoice)

          {

            if (inDevice != null)

              inDevice.close();

            inDevice =  (MidiDevice)

              inDevices.get(midiInChoice.getSelectedIndex());

          }

        if (e.getItemSelectable() == midiOutChoice)

          {

            if (outDevice != null)

              outDevice.close();

            outDevice = (MidiDevice)

              outDevices.get(midiOutChoice.getSelectedIndex());

          }

        if (inDevice != null && outDevice != null)

          {

            if (! inDevice.isOpen())

              inDevice.open();

            if (! outDevice.isOpen())

              outDevice.open();

            Transmitter t = inDevice.getTransmitter();

            if (t == null)

              System.err.println (inDevice + ".getTransmitter() == null");

            Receiver r = outDevice.getReceiver();

            if (r == null)

              System.err.println (outDevice + ".getReceiver() == null");

            if (t != null && r != null)

              t.setReceiver (r);

          }

      }

    catch (Exception ex)

      {

        ex.printStackTrace();

      }

  }

  public static void main (String args[]) throws Exception

    {

      new Demo();

    }

}