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         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                 menuItem = new JMenuItem("Add note...");
  60                 // menuItem.addActionListener();
  61                 popup.add(menuItem);
  62
  63                 // Adds listeners for popup menu and keyboard synthesizer.
  64                 addMouseListener(new MAdapter());
  65                 addKeyListener(new MooKeyboard());
  66         }
  67
  68         public void layoutElement(MooNoteElement elem, boolean old){
  69                 // If the element is currently in the view, removes its coordinates from the list.
  70                 Rectangle r = new Rectangle();
  71                 if (old){
  72                         r = elem.getBounds(r);
  73                         for (Iterator i = rects.iterator(); i.hasNext();){
  74                                 Object ob = i.next();
  75                                 if (r.equals(ob)){
  76                                         rects.remove(ob);
  77                                         break;
  78                                 }
  79                         }
  80                 }
  81
  82                 // Creates temporary variables.
  83                 int ticksPerSixteenth = Moosique.getSequence().getResolution() / 4;
  84                 MooNote mn = elem.getNote();
  85                 Insets insets = getInsets();
  86                 int x, y, height;
  87
  88                 // Calculates coordinates.
  89                 x = insets.left;
  90                 y = insets.top + (int)(mn.getTick() / ticksPerSixteenth) * NOTE_HEIGHT;
  91                 height = (mn.getDuration() / ticksPerSixteenth) * NOTE_HEIGHT;
  92                 if (height == 0) height = NOTE_HEIGHT;
  93                 r = new Rectangle(x, y, NOTE_WIDTH, height);
  94
  95                 // Places the element in the appropriate place.
  96                 while(isOccupied(r)) r.translate(NOTE_WIDTH, 0);
  97                 elem.setBounds(r);
  98                 rects.add(r);
  99                 if (viewLength < (y + height)){
 100                         viewLength = y + height;
 101                         if(old)setPreferredSize(new Dimension(VIEW_WIDTH, viewLength + extraHeight));
 102                 }
 103
 104         }
 105
 106         public Track getTrack() {
 107                 return track;
 108         }
 109
 110
 111         /**
 112          * Updates the track view.
 113          */
 114         public void update(long tickPosition) {
 115                 repaint();
 116         }
 117
 118         private boolean isOccupied(Rectangle r) {
 119                 Iterator it = rects.iterator();
 120                 while (it.hasNext()) {
 121                         if(r.intersects((Rectangle)it.next())) return true;
 122                 }
 123                 return false;
 124         }
 125
 126         public void remove(MooNoteElement elem) {
 127                 remove((Component)elem);
 128                 elem.getNote().removeFrom(track);
 129                 validate();
 130                 repaint();
 131         }
 132
 133         public void paintComponent(Graphics g) {
 134                 super.paintComponent(g);
 135                 Graphics2D g2 = (Graphics2D)g;
 136                 for (int c = 0; c < viewLength || c < getHeight(); c += NOTE_HEIGHT) {
 137                         for (int r = 0; r < (10 * NOTE_WIDTH); r += NOTE_WIDTH) {
 138                                 box = new Rectangle(r, c, NOTE_WIDTH, NOTE_HEIGHT);
 139                                 g2.setColor(Color.gray);
 140                                 g2.draw(box);
 141                         }
 142                 }
 143         }
 144
 145         class MAdapter extends MouseAdapter {
 146                 public void mousePressed(MouseEvent e) {
 147                         if (e.isPopupTrigger()) {
 148                                 popup.show(e.getComponent(), e.getX(), e.getY());
 149                         }
 150                 }
 151
 152                 public void mouseEntered(MouseEvent e) {
 153                         // Moosique.setActiveChannel(track.getChannel());
 154                 }
 155         }
 156 }