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 MooTrackTitle title;
  18         private NoteArea notes;
  19         private Rectangle box;
  20         private JPopupMenu popup;
  21         private JMenuItem menuItem;
  22         protected static int viewLength = 0;
  23
  24
  25         public MooTrackView (Track track) {
  26                 super(true);
  27                 this.track = track;
  28                 //setPreferredSize(new Dimension(200, 9000));
  29                 setLayout(new BorderLayout());
  30                 this.setBorder(BorderFactory.createLineBorder(Color.black));
  31
  32                 //title = new MooTrackTitle(track);
  33                 //title.setBorder(BorderFactory.createLineBorder(Color.black));
  34                 //add(title, BorderLayout.NORTH);
  35
  36                 notes = new NoteArea(track);
  37                 notes.setBackground(Color.white);
  38                 notes.setBorder(BorderFactory.createLineBorder(Color.black));
  39
  40                 popup = new JPopupMenu();
  41                 menuItem = new JMenuItem("Add...");
  42                 menuItem.addActionListener(this);
  43                 popup.add(menuItem);
  44                 menuItem = new JMenuItem("Preferences...");
  45                 menuItem.addActionListener(this);
  46                 popup.add(menuItem);
  47
  48                 notes.addMouseListener(new PopupListener());
  49                 add(notes, BorderLayout.CENTER);
  50         }
  51
  52         public void actionPerformed(ActionEvent e) {}
  53
  54         public Track getTrack() {
  55                 return track;
  56         }
  57
  58
  59         /**
  60          * Updates the track view.
  61          */
  62         public void update() {
  63                 repaint();
  64         }
  65
  66         class NoteArea extends JPanel {
  67                 public static final int NOTE_HEIGHT = 10;
  68                 public static final int NOTE_WIDTH = 40;
  69                 private int trackLength;
  70                 private ArrayList rects;
  71
  72                 public NoteArea(Track track) {
  73                         // Configuring panel
  74                         super(true);
  75                         setLayout(null);
  76                         trackLength = 140;
  77                         setPreferredSize(new Dimension(200, 140 * NOTE_HEIGHT));
  78
  79                         // Creating temporary variables
  80                         MidiEvent note;
  81                         MooNoteElement elem;
  82                         int x, y, height;
  83                         rects = new ArrayList(track.size() / 2);
  84
  85                         // Placing note elements
  86                         Insets insets = getInsets();
  87                         for (int i = 0; i < track.size(); i++) {
  88                                 note = track.get(i);
  89                                 if (note instanceof MooNote) {
  90                                         // Adds the note element to the note area.
  91                                         MooNote mn = (MooNote)note;
  92                                         elem = new MooNoteElement(mn);
  93                                         add(elem);
  94
  95                                         // Moves the note element to the appropriate place.
  96                                         x = insets.left;
  97                                         y = insets.top + (int)(mn.getTick() / 24) * NOTE_HEIGHT;
  98                                         height = (mn.getDuration() / 24) * NOTE_HEIGHT;
  99                                         if (height == 0) height = NOTE_HEIGHT;
 100                                         Rectangle r = new Rectangle(x, y, NOTE_WIDTH, height);
 101                                         while(isOccupied(r)) r.translate(NOTE_WIDTH, 0);
 102                                         elem.setBounds(r);
 103                                         rects.add(r);
 104                                         if (viewLength < (y + height)) viewLength = y + height;
 105
 106                                         // while(findComponentAt(x, y) instanceof MooNoteElement ||
 107                                         //       findComponentAt(x, y + height - 1) instanceof MooNoteElement) x += NOTE_WIDTH;
 108                                 }
 109                                 setPreferredSize(new Dimension(200, viewLength));
 110                         }
 111                         validate();
 112                 }
 113
 114                 private boolean isOccupied(Rectangle r) {
 115                         Iterator it = rects.iterator();
 116                         while (it.hasNext()) {
 117                                 if(r.intersects((Rectangle)it.next())) return true;
 118                         }
 119                         return false;
 120                 }
 121
 122                 public void paintComponent(Graphics g) {
 123                         super.paintComponent(g);
 124                         Graphics2D g2 = (Graphics2D)g;
 125                         for (int c = 0; c < viewLength ; c += NOTE_HEIGHT) {
 126                                 for (int r = 0; r < (10*NOTE_WIDTH); r += NOTE_WIDTH) {
 127                                         box = new Rectangle(r, c, NOTE_WIDTH, NOTE_HEIGHT);
 128                                         g2.setColor(Color.gray);
 129                                         g2.draw(box);
 130                                 }
 131                         }
 132                 }
 133         }
 134
 135         class PopupListener extends MouseAdapter {
 136                 public void mousePressed(MouseEvent e) {
 137                         maybeShowPopup(e);
 138                 }
 139
 140                 public void mouseReleased(MouseEvent e) {
 141                         maybeShowPopup(e);
 142                 }
 143
 144                 private void maybeShowPopup(MouseEvent e) {
 145                         if (e.isPopupTrigger()) {
 146                                 popup.show(e.getComponent(), e.getX(), e.getY());
 147                         }
 148                 }
 149         }
 150 }