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