MooTrackView.java

   1 import javax.swing.*;
   2 import java.awt.*;
   3 import java.awt.event.*;
   4 import javax.sound.midi.*;
   5
   6 /**
   7  * Graphical representation of a MIDI track.
   8  *
   9  * @author  Andersson , Andreen, Lanneskog, Pehrson
  10  * @version 1
  11  */
  12
  13 public class MooTrackView extends JPanel implements ActionListener {
  14
  15         private Track track;
  16         private MooTrackTitle title;
  17         private NoteArea notes;
  18         private Rectangle box;
  19         private JPopupMenu popup;
  20         private JMenuItem menuItem;
  21         protected static int viewLength = 0;
  22
  23
  24         public MooTrackView (Track track) {
  25                 this.track = track;
  26                 //setPreferredSize(new Dimension(200, 9000));
  27                 setLayout(new BorderLayout());
  28                 this.setBorder(BorderFactory.createLineBorder(Color.black));
  29
  30                 title = new MooTrackTitle(track);
  31                 title.setBorder(BorderFactory.createLineBorder(Color.black));
  32                 add(title, BorderLayout.NORTH);
  33
  34                 notes = new NoteArea(track);
  35                 notes.setBackground(Color.white);
  36                 notes.setBorder(BorderFactory.createLineBorder(Color.black));
  37
  38                 popup = new JPopupMenu();
  39                 menuItem = new JMenuItem("Add...");
  40                 menuItem.addActionListener(this);
  41                 popup.add(menuItem);
  42                 menuItem = new JMenuItem("Preferences...");
  43                 menuItem.addActionListener(this);
  44                 popup.add(menuItem);
  45
  46                 notes.addMouseListener(new PopupListener());
  47                 add(notes, BorderLayout.CENTER);
  48         }
  49
  50         public void actionPerformed(ActionEvent e) {}
  51
  52         public Track getTrack() {
  53                 return track;
  54         }
  55
  56
  57         /**
  58          * Updates the track view.
  59          */
  60         public void update() {
  61                 repaint();
  62         }
  63
  64         class NoteArea extends JPanel {
  65                 public static final int NOTE_HEIGHT = 10;
  66                 public static final int NOTE_WIDTH = 40;
  67                 private int trackLength;
  68
  69                 public NoteArea(Track track) {
  70                         // Configuring panel
  71                         setLayout(null);
  72                         trackLength = 140;
  73                         setPreferredSize(new Dimension(200, 140 * NOTE_HEIGHT));
  74
  75                         // Temporary variables
  76                         MidiEvent note;
  77                         MooNoteElement elem;
  78                         int x, y, height;
  79
  80                         // Placing note elements
  81                         Insets insets = getInsets();
  82                         for (int i = 0; i < track.size(); i++) {
  83                                 note = track.get(i);
  84                                 if (note instanceof MooNote) {
  85                                         // Adds the note element to the note area.
  86                                         MooNote mn = (MooNote)note;
  87                                         elem = new MooNoteElement(mn);
  88                                         add(elem);
  89
  90                                         // Moves the note element to the appropriate place.
  91                                         x = insets.left;
  92                                         y = insets.top + (int)(mn.getTick() / 24) * NOTE_HEIGHT;
  93                                         height = (mn.getDuration() / 24) * NOTE_HEIGHT;
  94                                         if (height == 0) height = NOTE_HEIGHT;
  95                                         while(findComponentAt(x, y) instanceof MooNoteElement ||
  96                                               findComponentAt(x, y + height - 1) instanceof MooNoteElement) x += NOTE_WIDTH;
  97                                         elem.setBounds(x, y, NOTE_WIDTH, height);
  98                                         if (viewLength < (y + height)) viewLength = y + height;
  99                                 }
 100                                 setPreferredSize(new Dimension(200,viewLength));
 101                         }
 102                         validate();
 103                 }
 104
 105                 public void paintComponent(Graphics g) {
 106                         super.paintComponent(g);
 107                         Graphics2D g2 = (Graphics2D)g;
 108                         for (int c = 0; c < viewLength ; c += NOTE_HEIGHT) {
 109                                 for (int r = 0; r < (10*NOTE_WIDTH); r += NOTE_WIDTH) {
 110                                         box = new Rectangle(r, c, NOTE_WIDTH, NOTE_HEIGHT);
 111                                         g2.setColor(Color.gray);
 112                                         g2.draw(box);
 113                                 }
 114                         }
 115                 }
 116         }
 117
 118         class PopupListener extends MouseAdapter {
 119                 public void mousePressed(MouseEvent e) {
 120                         maybeShowPopup(e);
 121                 }
 122
 123                 public void mouseReleased(MouseEvent e) {
 124                         maybeShowPopup(e);
 125                 }
 126
 127                 private void maybeShowPopup(MouseEvent e) {
 128                         if (e.isPopupTrigger()) {
 129                                 popup.show(e.getComponent(), e.getX(), e.getY());
 130                         }
 131                 }
 132         }
 133 }