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 {
  15
  16         private Track track;
  17         private Rectangle box;
  18         private JPopupMenu popup;
  19         private JMenuItem menuItem;
  20         private ArrayList rects;
  21         protected static int viewLength = 0;
  22         public static final int NOTE_HEIGHT = 10, NOTE_WIDTH = 40, VIEW_WIDTH = 200;
  23
  24         public MooTrackView (Track track) {
  25                 super(true);
  26                 this.track = track;
  27
  28                 // Configures panel
  29                 setBackground(Color.white);
  30                 setBorder(BorderFactory.createLineBorder(Color.black));
  31                 setLayout(null);
  32                 setPreferredSize(new Dimension(VIEW_WIDTH, 140 * NOTE_HEIGHT));
  33
  34                 // Creates temporary variables
  35                 MidiEvent note;
  36                 MooNoteElement elem;
  37                 int extraHeight = Toolkit.getDefaultToolkit().getScreenSize().height - 150;
  38                 int x, y, height;
  39                 int beatsPerSixteenth = Moosique.getSequence().getResolution() / 4;
  40                 rects = new ArrayList(track.size() / 2);
  41
  42                 // Places note elements
  43                 Insets insets = getInsets();
  44                 for (int i = 0; i < track.size(); i++) {
  45                         note = track.get(i);
  46                         if (note instanceof MooNote) {
  47                                 // Adds the note element to the note area.
  48                                 MooNote mn = (MooNote)note;
  49                                 elem = new MooNoteElement(this, mn);
  50                                 add(elem);
  51
  52                                 // Moves the note element to the appropriate place.
  53                                 x = insets.left;
  54                                 y = insets.top + (int)(mn.getTick() / beatsPerSixteenth) * NOTE_HEIGHT;
  55                                 height = (mn.getDuration() / beatsPerSixteenth) * NOTE_HEIGHT;
  56                                 if (height == 0) height = NOTE_HEIGHT;
  57                                 Rectangle r = new Rectangle(x, y, NOTE_WIDTH, height);
  58                                 while(isOccupied(r)) r.translate(NOTE_WIDTH, 0);
  59                                 elem.setBounds(r);
  60                                 rects.add(r);
  61                                 if (viewLength < (y + height)) viewLength = y + height;
  62                         }
  63                         setPreferredSize(new Dimension(VIEW_WIDTH, viewLength + extraHeight));
  64                 }
  65                 validate();
  66
  67                 // Creates pop-up menu.
  68                 popup = new JPopupMenu();
  69                 menuItem = new JMenuItem("Add...");
  70                 // menuItem.addActionListener();
  71                 popup.add(menuItem);
  72
  73                 addMouseListener(new PopupListener());
  74         }
  75
  76         public Track getTrack() {
  77                 return track;
  78         }
  79
  80         private boolean isOccupied(Rectangle r) {
  81                 Iterator it = rects.iterator();
  82                 while (it.hasNext()) {
  83                         if(r.intersects((Rectangle)it.next())) return true;
  84                 }
  85                 return false;
  86         }
  87
  88         public void remove(MooNoteElement elem) {
  89                 remove((Component)elem);
  90                 validate();
  91         }
  92
  93         public void paintComponent(Graphics g) {
  94                 super.paintComponent(g);
  95                 Graphics2D g2 = (Graphics2D)g;
  96                 for (int c = 0; c < viewLength || c < getHeight(); c += NOTE_HEIGHT) {
  97                         for (int r = 0; r < (10 * NOTE_WIDTH); r += NOTE_WIDTH) {
  98                                 box = new Rectangle(r, c, NOTE_WIDTH, NOTE_HEIGHT);
  99                                 g2.setColor(Color.gray);
 100                                 g2.draw(box);
 101                         }
 102                 }
 103         }
 104
 105         /**
 106          * Updates the track view.
 107          */
 108         public void update(long tickPosition) {
 109                 repaint();
 110         }
 111
 112         class PopupListener extends MouseAdapter {
 113                 public void mousePressed(MouseEvent e) {
 114                         if (e.isPopupTrigger()) {
 115                                 popup.show(e.getComponent(), e.getX(), e.getY());
 116                         }
 117                 }
 118         }
 119 }