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
  19         private JPopupMenu popup;
  20         private JMenuItem menuItem;
  21         private ArrayList rects;
  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
  29                 // Configures panel
  30                 setBackground(Color.white);
  31                 setBorder(BorderFactory.createLineBorder(Color.black));
  32                 setLayout(null);
  33                 setPreferredSize(new Dimension(VIEW_WIDTH, 140 * NOTE_HEIGHT));
  34
  35                 // Creates temporary variables
  36                 MidiEvent note;
  37                 MooNoteElement elem;
  38                 int extraHeight = Toolkit.getDefaultToolkit().getScreenSize().height - 150;
  39                 int x, y, height;
  40                 int beatsPerSixteenth = Moosique.getSequence().getResolution() / 4;
  41                 rects = new ArrayList(track.size() / 2);
  42
  43                 // Places note elements
  44                 Insets insets = getInsets();
  45                 for (int i = 0; i < track.size(); i++) {
  46                         note = track.get(i);
  47                         if (note instanceof MooNote) {
  48                                 // Adds the note element to the note area.
  49                                 MooNote mn = (MooNote)note;
  50                                 elem = new MooNoteElement(this, mn);
  51                                 add(elem);
  52
  53                                 // Moves the note element to the appropriate place.
  54                                 x = insets.left;
  55                                 y = insets.top + (int)(mn.getTick() / beatsPerSixteenth) * NOTE_HEIGHT;
  56                                 height = (mn.getDuration() / beatsPerSixteenth) * NOTE_HEIGHT;
  57                                 if (height == 0) height = NOTE_HEIGHT;
  58                                 Rectangle r = new Rectangle(x, y, NOTE_WIDTH, height);
  59                                 while(isOccupied(r)) r.translate(NOTE_WIDTH, 0);
  60                                 elem.setBounds(r);
  61                                 rects.add(r);
  62                                 if (viewLength < (y + height)) viewLength = y + height;
  63                         }
  64                         setPreferredSize(new Dimension(VIEW_WIDTH, viewLength + extraHeight));
  65                 }
  66                 validate();
  67
  68                 // Creates pop-up menu.
  69                 popup = new JPopupMenu();
  70                 menuItem = new JMenuItem("Add...");
  71                 // menuItem.addActionListener();
  72                 popup.add(menuItem);
  73
  74                 addMouseListener(new PopupListener());
  75         }
  76
  77         public Track getTrack() {
  78                 return track;
  79         }
  80
  81
  82         /**
  83          * Updates the track view.
  84          */
  85         public void update(long tickPosition) {
  86                 repaint();
  87         }
  88
  89         private boolean isOccupied(Rectangle r) {
  90                 Iterator it = rects.iterator();
  91                 while (it.hasNext()) {
  92                         if(r.intersects((Rectangle)it.next())) return true;
  93                 }
  94                 return false;
  95         }
  96
  97         public void remove(MooNoteElement elem) {
  98                 remove((Component)elem);
  99                 elem.getNote().removeFrom(track);
 100                 validate();
 101                 repaint();
 102         }
 103
 104         public void paintComponent(Graphics g) {
 105                 super.paintComponent(g);
 106                 Graphics2D g2 = (Graphics2D)g;
 107                 for (int c = 0; c < viewLength || c < getHeight(); c += NOTE_HEIGHT) {
 108                         for (int r = 0; r < (10 * NOTE_WIDTH); r += NOTE_WIDTH) {
 109                                 box = new Rectangle(r, c, NOTE_WIDTH, NOTE_HEIGHT);
 110                                 g2.setColor(Color.gray);
 111                                 g2.draw(box);
 112                         }
 113                 }
 114         }
 115
 116         class PopupListener extends MouseAdapter {
 117                 public void mousePressed(MouseEvent e) {
 118                         if (e.isPopupTrigger()) {
 119                                 popup.show(e.getComponent(), e.getX(), e.getY());
 120                         }
 121                 }
 122         }
 123 }