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

        private void HSLPicker_MouseDown( object sender, System.Windows.Forms.MouseEventArgs e )
        {
            // 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 ) )
            {
                trackMode = 1;
            }
            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 ) )
                {
                    trackMode = 2;
                }
            }

            if ( trackMode != 0 )
                this.Capture = true;
        }