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                 rects = new ArrayList(track.size() / 2);
  39
  40                 // Places note elements
  41                 for (int i = 0; i < track.size(); i++) {
  42                         note = track.get(i);
  43                         if (note instanceof MooNote) {
  44                                 // Adds the note element to the note area.
  45                                 MooNote mn = (MooNote)note;
  46                                 elem = new MooNoteElement(this, mn);
  47                                 add(elem);
  48
  49                                 layoutElement(elem);
  50
  51                                 // Moves the note element to the appropriate place.
  52                         }
  53                 }
  54                 validate();
  55
  56                 // Creates pop-up menu.
  57                 popup = new JPopupMenu();
  58                 menuItem = new JMenuItem("Add...");
  59                 // menuItem.addActionListener();
  60                 popup.add(menuItem);
  61
  62                 addMouseListener(new PopupListener());
  63         }
  64
  65         public void layoutElement(MooNoteElement elem){
  66                 int extraHeight = Toolkit.getDefaultToolkit().getScreenSize().height - 150;
  67                 int beatsPerSixteenth = Moosique.getSequence().getResolution() / 4;
  68                 MooNote mn = elem.getNote();
  69                 Insets insets = getInsets();
  70                 int x, y, height;
  71                 x = insets.left;
  72                 y = insets.top + (int)(mn.getTick() / beatsPerSixteenth) * NOTE_HEIGHT;
  73                 height = (mn.getDuration() / beatsPerSixteenth) * NOTE_HEIGHT;
  74                 if (height == 0) height = NOTE_HEIGHT;
  75                 Rectangle r = new Rectangle(x, y, NOTE_WIDTH, height);
  76                 while(isOccupied(r)) r.translate(NOTE_WIDTH, 0);
  77                 elem.setBounds(r);
  78                 rects.add(r);
  79                 if (viewLength < (y + height)){
  80                         viewLength = y + height;
  81                         setPreferredSize(new Dimension(VIEW_WIDTH, viewLength + extraHeight));
  82                 }
  83
  84         }
  85
  86         public Track getTrack() {
  87                 return track;
  88         }
  89
  90
  91         /**
  92          * Updates the track view.
  93          */
  94         public void update(long tickPosition) {
  95                 repaint();
  96         }
  97
  98         private boolean isOccupied(Rectangle r) {
  99                 Iterator it = rects.iterator();
 100                 while (it.hasNext()) {
 101                         if(r.intersects((Rectangle)it.next())) return true;
 102                 }
 103                 return false;
 104         }
 105
 106         public void remove(MooNoteElement elem) {
 107                 remove((Component)elem);
 108                 elem.getNote().removeFrom(track);
 109                 validate();
 110                 repaint();
 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         class PopupListener extends MouseAdapter {
 126                 public void mousePressed(MouseEvent e) {
 127                         if (e.isPopupTrigger()) {
 128                                 popup.show(e.getComponent(), e.getX(), e.getY());
 129                         }
 130                 }
 131         }
 132 }