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 popupAdd;
  21         private ArrayList rects;
  22         protected static int viewLength = 0;
  23         protected static int extraHeight = 0;
  24         public static final int NOTE_HEIGHT = 10, NOTE_WIDTH = 40, VIEW_WIDTH = 200;
  25
  26         public MooTrackView (Track track) {
  27                 super(true);
  28                 this.track = track;
  29
  30                 // Configures panel
  31                 setBackground(Color.white);
  32                 setBorder(BorderFactory.createLineBorder(Color.black));
  33                 setLayout(null);
  34                 setPreferredSize(new Dimension(VIEW_WIDTH, 140 * NOTE_HEIGHT));
  35
  36                 // Creates temporary variables
  37                 MidiEvent note;
  38                 MooNoteElement elem;
  39                 rects = new ArrayList(track.size() / 2);
  40                 extraHeight = Toolkit.getDefaultToolkit().getScreenSize().height - 150;
  41
  42                 // Places note elements
  43                 for (int i = 0; i < track.size(); i++) {
  44                         note = track.get(i);
  45                         if (note instanceof MooNote) {
  46                                 // Adds the note element to the note area and moves it to the appropriate place.
  47                                 MooNote mn = (MooNote)note;
  48                                 elem = new MooNoteElement(this, mn);
  49                                 add(elem);
  50                                 layoutElement(elem, false);
  51                         }
  52                         setPreferredSize(new Dimension(VIEW_WIDTH, viewLength + extraHeight));
  53
  54                 }
  55                 validate();
  56
  57                 // Creates pop-up menu.
  58                 popup = new JPopupMenu();
  59                 PopupListener pList = new PopupListener();
  60                 popupAdd = new JMenuItem("Add note...");
  61                 popupAdd.addActionListener(pList);
  62                 popup.add(popupAdd);
  63
  64                 // Adds listeners for popup menu and keyboard synthesizer.
  65                 addMouseListener(new MAdapter());
  66                 addKeyListener(new MooKeyboard());
  67         }
  68
  69         public void layoutElementMooNoteElement elem, boolean old){
  70                 // If the element is currently in the view, removes its coordinates from the list.
  71                 Rectangle r = new Rectangle();
  72                 if (old){
  73                         r = elem.getBounds(r);
  74                         for (Iterator i = rects.iterator(); i.hasNext();){
  75                                 Object ob = i.next();
  76                                 if (r.equals(ob)){
  77                                         rects.remove(ob);
  78                                         break;
  79                                 }
  80                         }
  81                 }
  82
  83                 // Creates temporary variables.
  84                 int ticksPerSixteenth = Moosique.getSequence().getResolution() / 4;
  85                 MooNote mn = elem.getNote();
  86                 Insets insets = getInsets();
  87                 int x, y, height;
  88
  89                 // Calculates coordinates.
  90                 x = insets.left;
  91                 y = insets.top + (int)(mn.getTick() / ticksPerSixteenth) * NOTE_HEIGHT;
  92                 height = (mn.getDuration() / ticksPerSixteenth) * NOTE_HEIGHT;
  93                 if (height == 0) height = NOTE_HEIGHT;
  94                 r = new Rectangle(x, y, NOTE_WIDTH, height);
  95
  96                 // Places the element in the appropriate place.
  97                 while(isOccupied(r)) r.translate(NOTE_WIDTH, 0);
  98                 elem.setBounds(r);
  99                 rects.add(r);
 100                 if (viewLength < (y + height)){
 101                         viewLength = y + height;
 102                         if(old)setPreferredSize(new Dimension(VIEW_WIDTH, viewLength + extraHeight));
 103                 }
 104
 105         }
 106
 107         public Track getTrack() {
 108                 return track;
 109         }
 110
 111
 112         /**
 113          * Updates the track view.
 114          */
 115         public void update(long tickPosition) {
 116                 repaint();
 117         }
 118
 119         private boolean isOccupied(Rectangle r) {
 120                 Iterator it = rects.iterator();
 121                 while (it.hasNext()) {
 122                         if(r.intersects((Rectangle)it.next())) return true;
 123                 }
 124                 return false;
 125         }
 126
 127         public void addNote(MooNote mn) {
 128                 mn.addTo(track);
 129                 MooNoteElement elem = new MooNoteElement(this, mn);
 130                 add(elem);
 131                 layoutElement(elem, false);
 132                 setPreferredSize(new Dimension(VIEW_WIDTH, viewLength + extraHeight));
 133         }
 134
 135         public void removeNote(MooNoteElement elem, MooNote mn) {
 136                 mn.removeFrom(track);
 137                 remove(elem);
 138                 elem.getNote().removeFrom(track);
 139                 validate();
 140                 repaint();
 141         }
 142
 143         public void paintComponent(Graphics g) {
 144                 super.paintComponent(g);
 145                 Graphics2D g2 = (Graphics2D)g;
 146                 for (int c = 0; c < viewLength || c < getHeight(); c += NOTE_HEIGHT) {
 147                         for (int r = 0; r < (10 * NOTE_WIDTH); r += NOTE_WIDTH) {
 148                                 box = new Rectangle(r, c, NOTE_WIDTH, NOTE_HEIGHT);
 149                                 g2.setColor(Color.gray);
 150                                 g2.draw(box);
 151                         }
 152                 }
 153         }
 154
 155         class MAdapter extends MouseAdapter {
 156                 public void mousePressed(MouseEvent e) {
 157                         if (e.isPopupTrigger()) {
 158                                 popup.show(e.getComponent(), e.getX(), e.getY());
 159                         }
 160                 }
 161
 162                 public void mouseEntered(MouseEvent e) {
 163                         // Moosique.setActiveChannel(track.getChannel());
 164                         grabFocus();
 165                 }
 166         }
 167
 168         class PopupListener implements ActionListener {
 169                 public void actionPerformed(ActionEvent e) {
 170                         Object source = e.getSource();
 171                         if  (source == popupAdd) {
 172                                 addNote(new MooNote());
 173                                 // int channel, int pitch, int velocity, long timestamp, int duration
 174                 }
 175         }
 176 }