C:/Projekte/I2BPro/src/i2bpro/layer/Panels/CenterPanel.java

package i2bpro.layer.Panels;

import i2bpro.Exceptions.ErrorMsg;
import i2bpro.Exceptions.LayerException;
import i2bpro.layer.Layer;
import i2bpro.playlist.PlayList;
import i2bpro.player.Player;
import i2bpro.layer.Menus.PlayListPopupMenu;
import i2bpro.playlist.PlayListCellRenderer;
import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.GridLayout;
import java.awt.datatransfer.DataFlavor;
import java.awt.datatransfer.Transferable;
import java.awt.datatransfer.UnsupportedFlavorException;
import java.awt.dnd.DnDConstants;
import java.awt.dnd.DropTarget;
import java.awt.dnd.DropTargetDragEvent;
import java.awt.dnd.DropTargetDropEvent;
import java.awt.dnd.DropTargetEvent;
import java.awt.dnd.DropTargetListener;
import java.awt.event.MouseEvent;
import java.awt.event.MouseListener;
import java.awt.event.MouseMotionListener;
import java.io.File;
import java.io.IOException;
import java.net.MalformedURLException;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.Iterator;
import java.util.List;
import javax.media.NoPlayerException;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JTable;
import javax.swing.ListSelectionModel;
import javax.swing.border.EmptyBorder;
import org.jaudiotagger.audio.exceptions.CannotReadException;
import org.jaudiotagger.audio.exceptions.InvalidAudioFrameException;
import org.jaudiotagger.audio.exceptions.ReadOnlyFileException;
import org.jaudiotagger.tag.TagException;



public final class CenterPanel extends JPanel implements DropTargetListener

{
    private JTable table = new JTable(PlayList.getInstance());
    private JScrollPane sp =
            new JScrollPane(table, JScrollPane.VERTICAL_SCROLLBAR_AS_NEEDED,
                JScrollPane.HORIZONTAL_SCROLLBAR_AS_NEEDED);
    private int rolloverID = -1;
    private int pressed_id = -1;
    private int old_change_id = -1;
    private boolean pressed = false;
    private HashMap<Integer, HashMap<String, String>> tmpPlayList;
    private boolean old_save;
    private int count = 0;



    public CenterPanel()
    {
        initTable();
        setLayout(new GridLayout(1,1));
        setBorder(new EmptyBorder(5,5,5,5));
        JPanel p = new JPanel();
        p.setLayout(new BorderLayout());
        p.add(sp, BorderLayout.CENTER);
        add(p);
        addListeners();
    }



    private void initTable()
    {
        table.setSelectionMode(ListSelectionModel.SINGLE_SELECTION);
        table.setCellSelectionEnabled(false);
        table.setColumnSelectionAllowed(false);
        table.setRowSelectionAllowed(true);
        table.setAutoResizeMode(JTable.AUTO_RESIZE_OFF);
        table.getColumnModel().getColumn(0).setMinWidth(20);
        table.getColumnModel().getColumn(0).setMaxWidth(20);
        table.getColumnModel().getColumn(1).setMinWidth(40);
        table.getColumnModel().getColumn(1).setMaxWidth(50);
        table.getColumnModel().getColumn(2).setMinWidth(200);
        table.getColumnModel().getColumn(2).setPreferredWidth(400);
        table.getColumnModel().getColumn(3).setMinWidth(200);
        table.getColumnModel().getColumn(3).setPreferredWidth(400);
        table.getColumnModel().getColumn(4).setMinWidth(200);
        table.getColumnModel().getColumn(4).setPreferredWidth(400);
        table.getColumnModel().getColumn(5).setMinWidth(50);
        table.getColumnModel().getColumn(5).setPreferredWidth(50);
        table.getColumnModel().getColumn(6).setMinWidth(50);
        table.getColumnModel().getColumn(6).setPreferredWidth(50);
        table.setBackground(Color.cyan);
        table.setForeground(Color.black);
        table.setGridColor(Color.black);
        table.setDefaultRenderer(Object.class, new PlayListCellRenderer());
        table.setDragEnabled(false);
        DropTarget dropTarget = new DropTarget (this, this);
    }

    
    
    private void addListeners()
    {
        table.addMouseListener(new MouseListener()
        {
            public void mouseClicked(MouseEvent e) { TableMouseClicked(e);  }

            public void mousePressed(MouseEvent e) { TableMousePressed(e); }

            public void mouseReleased(MouseEvent e)
            {
                //  Wurde die 1. Mousetaste losgelassen, so ist
                //  der Audioplayer aus dem Pressed Modus zu nehmen.
                if (e.getButton() == MouseEvent.BUTTON1) pressed = false;
            }

            public void mouseEntered(MouseEvent e) {}

            public void mouseExited(MouseEvent e) {}
        });

        table.addMouseMotionListener(new MouseMotionListener()
        {
            public void mouseDragged(MouseEvent e) { TableMouseDragged(e); }

            public void mouseMoved(MouseEvent e) { TableMouseMoved(e); }
        });
    }



    private  void TableMouseClicked(MouseEvent e)
    {
        int click_id = (int)(e.getY() / table.getRowHeight());
        table.setRowSelectionInterval(click_id, click_id);
        if(e.getButton() == MouseEvent.BUTTON3)
            showPlayListPopupMenu(e, click_id);
        else if (e.getButton() == MouseEvent.BUTTON2)
        {
            try
            {
                if (Player.getInstance().getState() > 0)
                    Player.getInstance().stop();
                Layer.getInstance().play(click_id);
            }
            catch (LayerException ex) { ErrorMsg.show(ex.getMessage()); }
            catch (MalformedURLException ex) { ErrorMsg.show(ex.getMessage()); }
            catch (IOException ex) { ErrorMsg.show(ex.getMessage()); }
            catch (NoPlayerException ex) { ErrorMsg.show(ex.getMessage()); }
        }
    }



    private void TableMousePressed(MouseEvent e)
    {
        if (e.getButton() == MouseEvent.BUTTON1)
        {
            if (pressed == false)
            {
                pressed_id = (int)(e.getY() / table.getRowHeight());
                old_change_id = pressed_id;
                tmpPlayList = PlayList.getInstance().getPlayList();
                pressed = true;
                old_save = Layer.getInstance().isSave();
            }
        }
    }



    private void TableMouseDragged(MouseEvent e)
    {
        if (pressed)
        {
            int change_id = (int)(e.getY() / table.getRowHeight());
            if (change_id != old_change_id)
            {
                if ((change_id >= 0)
                        && (change_id < PlayList.getInstance().getPlayList().size())
                        && (e.getX() > table.getX())
                        && (e.getX() < (table.getX() + table.getSize().getWidth())))
                {
                    {
                        PlayList.getInstance().changeSequence(pressed_id, change_id);
                        table.updateUI();
                        pressed_id = change_id;
                        Layer.getInstance().setSave(true);
                    }
                } else {
                    PlayList.getInstance().changePlayList(tmpPlayList);
                    Layer.getInstance().setSave(old_save);
                }
            }
            old_change_id = change_id;
        }
    }



    private void TableMouseMoved(MouseEvent e)
    {
        int new_rolloverID = (int)(e.getY() / table.getRowHeight());
        if (new_rolloverID != rolloverID)
        {
            rolloverID = new_rolloverID;
            table.setToolTipText(PlayList.getInstance().getMeta(
                    rolloverID, "media"));
        }
    }



    private void showPlayListPopupMenu(MouseEvent event, int click_id)
    {
        PlayListPopupMenu tpm = new PlayListPopupMenu(click_id);
        tpm.show(table, event.getX(), event.getY());
    }



    public void dragEnter(DropTargetDragEvent dtde) {}



    public void dragOver(DropTargetDragEvent dtde) {}



    public void dropActionChanged(DropTargetDragEvent dtde) {}



    public void dragExit(DropTargetEvent dte) {}



    public void drop(DropTargetDropEvent dtde)
    {
        Transferable tr = dtde.getTransferable();
        if (tr.isDataFlavorSupported (DataFlavor.javaFileListFlavor))
        {
            try
            {
                dtde.acceptDrop(DnDConstants.ACTION_COPY_OR_MOVE);
                java.util.List files = (java.util.List)
                        tr.getTransferData(DataFlavor.javaFileListFlavor);
                InsertMedia(files);
                dtde.getDropTargetContext().dropComplete(true);
            }
            catch (UnsupportedFlavorException ex) { ErrorMsg.show(ex.getMessage()); }
            catch (IOException ex) { ErrorMsg.show(ex.getMessage()); }
            catch (CannotReadException ex) { ErrorMsg.show(ex.getMessage()); }
            catch (TagException ex) { ErrorMsg.show(ex.getMessage()); }
            catch (ReadOnlyFileException ex) { ErrorMsg.show(ex.getMessage()); }
            catch (InvalidAudioFrameException ex) { ErrorMsg.show(ex.getMessage()); }
        } else {
            dtde.rejectDrop();
        }
    }



    public void PlayListChange()
    {
        table.updateUI();
    }




    public int getSelectedRow() { return table.getSelectedRow(); }



    private void InsertMedia(List files) throws CannotReadException, 
            IOException, TagException, ReadOnlyFileException,
            InvalidAudioFrameException
    {
        ArrayList<File> list = new ArrayList<File>();
        Iterator it = files.iterator();
        while(it.hasNext())
        {
            String filename = it.next().toString();
            File file = new File(filename);
            if (file.isFile())
            {
                String extension =
                        filename.substring(filename.length()-4).toLowerCase();
                if (extension.equals(".wav") || extension.equals(".mp3"))
                    list.add(file);
            }
        }
        File[] liste = new File[list.size()];
        it = list.iterator();
        int i = 0;
        while(it.hasNext())
        {
            liste[i] = (File) it.next();
            i++;
        }
        PlayList.getInstance().InsertMedia(liste);
    }



    public void setRowSelection(int selected_id)
    {
        table.setRowSelectionInterval(selected_id, selected_id);
    }
}