- class NoteArea extends JPanel {
- public static final int NOTE_HEIGHT = 10, NOTE_WIDTH = 40, VIEW_WIDTH = 200;
- private ArrayList rects;
-
- public NoteArea(Track track) {
- // Configuring panel
- super(true);
- setLayout(null);
- setPreferredSize(new Dimension(VIEW_WIDTH, 140 * NOTE_HEIGHT));
-
- // Creating temporary variables
- MidiEvent note;
- MooNoteElement elem;
- int x, y, height;
- rects = new ArrayList(track.size() / 2);
-
- // Placing note elements
- Insets insets = getInsets();
- for (int i = 0; i < track.size(); i++) {
- note = track.get(i);
- if (note instanceof MooNote) {
- // Adds the note element to the note area.
- MooNote mn = (MooNote)note;
- elem = new MooNoteElement(mn);
- add(elem);
-
- // Moves the note element to the appropriate place.
- x = insets.left;
- y = insets.top + (int)(mn.getTick() / 24) * NOTE_HEIGHT;
- height = (mn.getDuration() / 24) * NOTE_HEIGHT;
- if (height == 0) height = NOTE_HEIGHT;
- Rectangle r = new Rectangle(x, y, NOTE_WIDTH, height);
- while(isOccupied(r)) r.translate(NOTE_WIDTH, 0);
- elem.setBounds(r);
- rects.add(r);
- if (viewLength < (y + height)) viewLength = y + height;
- }
- setPreferredSize(new Dimension(VIEW_WIDTH, viewLength));
- }
- validate();
- }
-
- private boolean isOccupied(Rectangle r) {
- Iterator it = rects.iterator();
- while (it.hasNext()) {
- if(r.intersects((Rectangle)it.next())) return true;
- }
- return false;