MooTrackView.java

   1 import javax.swing.*;
   2 import java.awt.*;
   3 import java.awt.event.*;
   4 import javax.sound.midi.*;
   5 import java.util.*;
   6
   7 /**
   8  * Graphical representation of a MIDI track.
   9  *
  10  * @author  Andersson , Andreen, Lanneskog, Pehrson
  11  * @version 1
  12  */
  13
  14 public class MooTrackView extends JPanel implements ActionListener {
  15
  16         private Track track;
  17         private NoteArea notes;
  18         private Rectangle box;
  19         private JPopupMenu popup;
  20         private JPopupMenu notePopup;
  21         private JMenuItem menuItem;
  22         protected static int viewLength = 0;
  23         public static final int NOTE_HEIGHT = 10, NOTE_WIDTH = 40, VIEW_WIDTH = 200;
  24
  25         public MooTrackView (Track track) {
  26                 super(true);
  27                 this.track = track;
  28                 setLayout(new BorderLayout());
  29
  30                 notes = new NoteArea(track);
  31                 notes.setBackground(Color.white);
  32                 notes.setBorder(BorderFactory.createLineBorder(Color.black));
  33
  34                 popup = new JPopupMenu();
  35                 menuItem = new JMenuItem("Add...");
  36                 menuItem.addActionListener(this);
  37                 popup.add(menuItem);
  38
  39                 notePopup = new JPopupMenu();
  40                 menuItem = new JMenuItem("Preferences...");
  41                 menuItem.addActionListener(this);
  42                 notePopup.add(menuItem);
  43
  44 //              notes.addMouseListener(new PopupListener());
  45                 add(notes, BorderLayout.CENTER);
  46         }
  47
  48         public void actionPerformed(ActionEvent e) {}
  49
  50         public Track getTrack() {
  51                 return track;
  52         }
  53
  54
  55         /**
  56          * Updates the track view.
  57          */
  58         public void update(long tickPosition) {
  59                 repaint();
  60         }
  61
  62         class NoteArea extends JPanel {
  63                 public static final int NOTE_HEIGHT = 10, NOTE_WIDTH = 40, VIEW_WIDTH = 200;
  64                 private ArrayList rects;
  65
  66                 public NoteArea(Track track) {
  67                         // Configuring panel
  68                         super(true);
  69                         setLayout(null);
  70                         setPreferredSize(new Dimension(VIEW_WIDTH, 140 * NOTE_HEIGHT));
  71
  72                         // Creating temporary variables
  73                         MidiEvent note;
  74                         MooNoteElement elem;
  75                         int x, y, height;
  76                         int beatsPerSixteenth = Moosique.getSequence().getResolution() / 4;
  77                         rects = new ArrayList(track.size() / 2);
  78
  79                         // Placing note elements
  80                         Insets insets = getInsets();
  81                         for (int i = 0; i < track.size(); i++) {
  82                                 note = track.get(i);
  83                                 if (note instanceof MooNote) {
  84                                         // Adds the note element to the note area.
  85                                         MooNote mn = (MooNote)note;
  86                                         elem = new MooNoteElement(mn);
  87                                         add(elem);
  88
  89                                         // Moves the note element to the appropriate place.
  90                                         x = insets.left;
  91                                         y = insets.top + (int)(mn.getTick() / beatsPerSixteenth) * NOTE_HEIGHT;
  92                                         height = (mn.getDuration() / beatsPerSixteenth) * NOTE_HEIGHT;
  93                                         if (height == 0) height = NOTE_HEIGHT;
  94                                         Rectangle r = new Rectangle(x, y, NOTE_WIDTH, height);
  95                                         while(isOccupied(r)) r.translate(NOTE_WIDTH, 0);
  96                                         elem.setBounds(r);
  97                                         rects.add(r);
  98                                         if (viewLength < (y + height)) viewLength = y + height;
  99                                 }
 100                                 setPreferredSize(new Dimension(VIEW_WIDTH, viewLength));
 101                         }
 102                         validate();
 103                 }
 104
 105                 private boolean isOccupied(Rectangle r) {
 106                         Iterator it = rects.iterator();
 107                         while (it.hasNext()) {
 108                                 if(r.intersects((Rectangle)it.next())) return true;
 109                         }
 110                         return false;
 111                 }
 112
 113                 public void paintComponent(Graphics g) {
 114                         super.paintComponent(g);
 115                         Graphics2D g2 = (Graphics2D)g;
 116                         for (int c = 0; c < viewLength || c < getHeight(); c += NOTE_HEIGHT) {
 117                                 for (int r = 0; r < (10 * NOTE_WIDTH); r += NOTE_WIDTH) {
 118                                         box = new Rectangle(r, c, NOTE_WIDTH, NOTE_HEIGHT);
 119                                         g2.setColor(Color.gray);
 120                                         g2.draw(box);
 121                                 }
 122                         }
 123                 }
 124         }
 125
 126         class PopupListener extends MouseAdapter {
 127                 public void mousePressed(MouseEvent e) {
 128                         maybeShowPopup(e);
 129                 }
 130
 131                 public void mouseReleased(MouseEvent e) {
 132                         maybeShowPopup(e);
 133                 }
 134
 135                 private void maybeShowPopup(MouseEvent e) {
 136                         if (e.isPopupTrigger()) {
 137                                 if (findComponentAt(e.getX(), e.getY()) instanceof MooNoteElement)
 138                                         notePopup.show(e.getComponent(), e.getX(), e.getY());
 139                                 else
 140                                         popup.show(e.getComponent(), e.getX(), e.getY());
 141                         }
 142                 }
 143         }
 144 }