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                 extraHeight = Toolkit.getDefaultToolkit().getScreenSize().height - 150;
  31                 // Configures panel
  32                 setBackground(Color.white);
  33                 setBorder(BorderFactory.createLineBorder(Color.black));
  34                 setLayout(null);
  35                 setPreferredSize(new Dimension(VIEW_WIDTH, 140 * NOTE_HEIGHT));
  36
  37                 // Creates temporary variables
  38                 MidiEvent note;
  39                 MooNoteElement elem;
  40                 rects = new ArrayList(track.size() / 2);
  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...");
  60                 // menuItem.addActionListener();
  61                 popup.add(menuItem);
  62
  63                 addMouseListener(new PopupListener());
  64         }
  65
  66         public void layoutElement(MooNoteElement elem, boolean old){
  67                 // If the element is currently in the view, removes its coordinates from the list.
  68                 Rectangle r = new Rectangle();
  69                 if (old){
  70                         r = elem.getBounds(r);
  71                         for (Iterator i = rects.iterator(); i.hasNext();){
  72                                 Object ob = i.next();
  73                                 if (r.equals(ob)){
  74                                         rects.remove(ob);
  75                                         break;
  76                                 }
  77                         }
  78                 }
  79
  80                 // Creates temporary variables.
  81                 int ticksPerSixteenth = Moosique.getSequence().getResolution() / 4;
  82                 MooNote mn = elem.getNote();
  83                 Insets insets = getInsets();
  84                 int x, y, height;
  85
  86                 // Calculates coordinates.
  87                 x = insets.left;
  88                 y = insets.top + (int)(mn.getTick() / ticksPerSixteenth) * NOTE_HEIGHT;
  89                 height = (mn.getDuration() / ticksPerSixteenth) * NOTE_HEIGHT;
  90                 if (height == 0) height = NOTE_HEIGHT;
  91                 r = new Rectangle(x, y, NOTE_WIDTH, height);
  92
  93                 // Places the element in the appropriate place.
  94                 while(isOccupied(r)) r.translate(NOTE_WIDTH, 0);
  95                 elem.setBounds(r);
  96                 rects.add(r);
  97                 if (viewLength < (y + height)){
  98                         viewLength = y + height;
  99                         if(old)setPreferredSize(new Dimension(VIEW_WIDTH, viewLength + extraHeight));
 100                 }
 101
 102         }
 103
 104         public Track getTrack() {
 105                 return track;
 106         }
 107
 108
 109         /**
 110          * Updates the track view.
 111          */
 112         public void update(long tickPosition) {
 113                 repaint();
 114         }
 115
 116         private boolean isOccupied(Rectangle r) {
 117                 Iterator it = rects.iterator();
 118                 while (it.hasNext()) {
 119                         if(r.intersects((Rectangle)it.next())) return true;
 120                 }
 121                 return false;
 122         }
 123
 124         public void remove(MooNoteElement elem) {
 125                 remove((Component)elem);
 126                 elem.getNote().removeFrom(track);
 127                 validate();
 128                 repaint();
 129         }
 130
 131         public void paintComponent(Graphics g) {
 132                 super.paintComponent(g);
 133                 Graphics2D g2 = (Graphics2D)g;
 134                 for (int c = 0; c < viewLength || c < getHeight(); c += NOTE_HEIGHT) {
 135                         for (int r = 0; r < (10 * NOTE_WIDTH); r += NOTE_WIDTH) {
 136                                 box = new Rectangle(r, c, NOTE_WIDTH, NOTE_HEIGHT);
 137                                 g2.setColor(Color.gray);
 138                                 g2.draw(box);
 139                         }
 140                 }
 141         }
 142
 143         class PopupListener extends MouseAdapter {
 144                 public void mousePressed(MouseEvent e) {
 145                         if (e.isPopupTrigger()) {
 146                                 popup.show(e.getComponent(), e.getX(), e.getY());
 147                         }
 148                 }
 149         }
 150 }