AForge.Controls.HuePicker.HSLPicker_MouseMove C# (CSharp) Метод

        private void HSLPicker_MouseMove( object sender, System.Windows.Forms.MouseEventArgs e )
        {
            Cursor cursor = Cursors.Default;

            if ( trackMode != 0 )
            {
                cursor = Cursors.Hand;

                int dy = e.Y - ptCenter.Y;
                int dx = e.X - ptCenter.X;

                if ( trackMode == 1 )
                {
                    // MIN pointer tracking
                    min = (int) ( Math.Atan2( -dy, dx ) * 180 / Math.PI );
                    if ( min < 0 )
                    {
                        min = 360 + min;
                    }
                }
                else
                {
                    // MAX pointer tracking
                    max = (int) ( Math.Atan2( -dy, dx ) * 180 / Math.PI );
                    if ( max < 0 )
                    {
                        max = 360 + max;
                    }
                }

                // repaint control
                Invalidate( );
            }
            else
            {
                // check coordinates of MIN pointer
                if ( ( e.X >= ptMin.X - 4 ) && ( e.Y >= ptMin.Y - 4 ) &&
                     ( e.X <  ptMin.X + 4 ) && ( e.Y <  ptMin.Y + 4 ) )
                {
                    cursor = Cursors.Hand;
                }
                if ( type == HuePickerType.Range )
                {
                    // check coordinates of MAX pointer
                    if ( ( e.X >= ptMax.X - 4 ) && ( e.Y >= ptMax.Y - 4 ) &&
                         ( e.X <  ptMax.X + 4 ) && ( e.Y <  ptMax.Y + 4 ) )
                    {
                        cursor = Cursors.Hand;
                    }
                }

            }

            this.Cursor = cursor;
        }
    }