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                         setLayout(null);
  71                         trackLength = 140;
  72                         setPreferredSize(new Dimension(200,140*NOTE_HEIGHT));
  73                         MidiEvent note;
  74                         MooNoteElement elem;
  75                         boolean isOccupied;
  76                         int x, y, height;
  77                         Insets insets = getInsets();
  78                         for (int i = 0; i < track.size(); i++) {
  79                                 note = track.get(i);
  80                                 if (note instanceof MooNote) {
  81                                         // Adds the note element to the note area.
  82                                         MooNote mn = (MooNote)note;
  83                                         elem = new MooNoteElement(mn);
  84                                         add(elem);
  85
  86                                         // Places the note element in the appropriate place.
  87                                         x = insets.left;
  88                                         y = insets.top + (int)(mn.getTick() / 24) * NOTE_HEIGHT;
  89                                         height = NOTE_HEIGHT;
  90                                         // height = (mn.getDuration() / 24) * NOTE_HEIGHT;
  91                                         while(findComponentAt(x, y) instanceof MooNoteElement ||
  92                                               findComponentAt(x, y + height - 1) instanceof MooNoteElement) x += NOTE_WIDTH;
  93                                         elem.setBounds(x, y, NOTE_WIDTH, height);
  94                                         if (viewLength < (y+height)) viewLength = y+height;
  95                                 }
  96                                 setPreferredSize(new Dimension(200,viewLength));
  97                         }
  98                         validate();
  99                 }
 100
 101                 public void paintComponent(Graphics g) {
 102                         super.paintComponent(g);
 103                         Graphics2D g2 = (Graphics2D)g;
 104 //(trackLength*NOTE_HEIGHT)
 105                         for (int c = 0; c < viewLength ; c += NOTE_HEIGHT) {
 106                                 for (int r = 0; r < (10*NOTE_WIDTH); r += NOTE_WIDTH) {
 107                                         box = new Rectangle(r, c, NOTE_WIDTH, NOTE_HEIGHT);
 108                                         g2.setColor(Color.gray);
 109                                         g2.draw(box);
 110                                 }
 111                         }
 112                 }
 113         }
 114
 115         class PopupListener extends MouseAdapter {
 116                 public void mousePressed(MouseEvent e) {
 117                         maybeShowPopup(e);
 118                 }
 119
 120                 public void mouseReleased(MouseEvent e) {
 121                         maybeShowPopup(e);
 122                 }
 123
 124                 private void maybeShowPopup(MouseEvent e) {
 125                         if (e.isPopupTrigger()) {
 126                                 popup.show(e.getComponent(), e.getX(), e.getY());
 127                         }
 128                 }
 129         }
 130 }