MetroFramework.Controls.MetroScrollBar.OnMouseDown C# (CSharp) Method

        protected override void OnMouseDown(MouseEventArgs e)
        {
            if (e.Button == MouseButtons.Left)
            {
                isPressed = true;
                Invalidate();
            }

            base.OnMouseDown(e);

            Focus();

            if (e.Button == MouseButtons.Left) {

                var mouseLocation = e.Location;

                if (thumbRectangle.Contains(mouseLocation))
                {
                    thumbClicked = true;
                    thumbPosition = metroOrientation == MetroScrollOrientation.Vertical ? mouseLocation.Y - thumbRectangle.Y : mouseLocation.X - thumbRectangle.X;

                    Invalidate(thumbRectangle);
                }
                else
                {
                    trackPosition = metroOrientation == MetroScrollOrientation.Vertical ? mouseLocation.Y : mouseLocation.X;

                    if (trackPosition < (metroOrientation == MetroScrollOrientation.Vertical ? thumbRectangle.Y : thumbRectangle.X))
                    {
                        topBarClicked = true;
                    }
                    else
                    {
                        bottomBarClicked = true;
                    }

                    ProgressThumb(true);
                }
            }
            else if (e.Button == MouseButtons.Right)
            {
                trackPosition = metroOrientation == MetroScrollOrientation.Vertical ? e.Y : e.X;
            }
        }