/// <summary>
/// Method to paint the wave
/// </summary>
/// <param name="e"></param>
protected override void OnPaint(PaintEventArgs e)
{
base.OnPaint(e);
scrollBar.Invalidate();
scrollBar.Refresh();
drawHeight = Height - scrollBar.ClientRectangle.Height;
Graphics g = e.Graphics;
drawSelection(g);
drawGrid(g);
drawWave(g);
}
