public void mouseDragged(MouseEvent e) {
// System.out.println("Dragged");
double beatWidth = sp.beatWidth;
beatWidth += (double) ((double) e.getX() - (double) startX) / 5.0;
if (beatWidth < 1.0) beatWidth = 1.0;
if (beatWidth > 256.0) beatWidth = 256.0;
// System.out.println("beatWidth = "+beatWidth);
sp.beatWidth = beatWidth;
startX = e.getX();
// sp.update();
this.repaint();
}