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
  22
  23         public MooTrackView (Track track) {
  24                 this.track = track;
  25                 setPreferredSize(new Dimension(200, 200));
  26                 setLayout(new BorderLayout());
  27                 this.setBorder(BorderFactory.createLineBorder(Color.black));
  28
  29                 title = new MooTrackTitle(track);
  30                 title.setBorder(BorderFactory.createLineBorder(Color.black));
  31                 add(title, BorderLayout.NORTH);
  32
  33                 notes = new NoteArea(track);
  34                 notes.setBackground(Color.white);
  35                 notes.setBorder(BorderFactory.createLineBorder(Color.black));
  36
  37                 popup = new JPopupMenu();
  38                 menuItem = new JMenuItem("Add...");
  39                 menuItem.addActionListener(this);
  40                 popup.add(menuItem);
  41                 menuItem = new JMenuItem("Preferences...");
  42                 menuItem.addActionListener(this);
  43                 popup.add(menuItem);
  44
  45                 notes.addMouseListener(new PopupListener());
  46                 add(notes, BorderLayout.CENTER);
  47         }
  48
  49         public void actionPerformed(ActionEvent e) {}
  50
  51         public Track getTrack() {
  52                 return track;
  53         }
  54
  55
  56         /**
  57          * Updates the track view.
  58          */
  59         public void update() {
  60                 repaint();
  61         }
  62
  63         class NoteArea extends JPanel {
  64                 public static final int NOTE_HEIGHT = 10;
  65                 public static final int NOTE_WIDTH = 40;
  66                 private int trackLength;
  67
  68                 public NoteArea(Track track) {
  69                         System.out.println("Creating track view...");
  70                         setLayout(null);
  71                         trackLength = 140;
  72                         MidiEvent note;
  73                         MooNoteElement elem;
  74                         boolean isOccupied;
  75                         int x, y, height;
  76                         Insets insets = getInsets();
  77                         for (int i = 0; i < track.size(); i++) {
  78                                 note = track.get(i);
  79                                 if (note instanceof MooNote) {
  80                                         // Adds the note element to the note area.
  81                                         MooNote mn = (MooNote)note;
  82                                         elem = new MooNoteElement(mn);
  83                                         add(elem);
  84
  85                                         // Places the note element in the appropriate place.
  86                                         x = insets.left;
  87                                         y = insets.top + (int)(mn.getTick() / 24) * NOTE_HEIGHT;
  88                                         height = NOTE_HEIGHT;
  89                                         // height = (mn.getDuration() / 24) * NOTE_HEIGHT;
  90                                         // System.out.println("Comp at: " + x + ", " + y + " is: " + findComponentAt(x + 10, y + 10));
  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                                 }
  95                         }
  96                         validate();
  97                 }
  98
  99                 public void paintComponent(Graphics g) {
 100                         super.paintComponent(g);
 101                         Graphics2D g2 = (Graphics2D)g;
 102                         for (int c = 0; c < (trackLength*NOTE_HEIGHT); c += NOTE_HEIGHT) {
 103                                 for (int r = 0; r < (10*NOTE_WIDTH); r += NOTE_WIDTH) {
 104                                         box = new Rectangle(r, c, NOTE_WIDTH, NOTE_HEIGHT);
 105                                         g2.setColor(Color.gray);
 106                                         g2.draw(box);
 107                                 }
 108                         }
 109                 }
 110         }
 111
 112         class PopupListener extends MouseAdapter {
 113                 public void mousePressed(MouseEvent e) {
 114                         maybeShowPopup(e);
 115                 }
 116
 117                 public void mouseReleased(MouseEvent e) {
 118                         maybeShowPopup(e);
 119                 }
 120
 121                 private void maybeShowPopup(MouseEvent e) {
 122                         if (e.isPopupTrigger()) {
 123                                 popup.show(e.getComponent(), e.getX(), e.getY());
 124                         }
 125                 }
 126         }
 127 }