AForge.Controls.ManipulatorControl.ManipulatorControl_Paint C# (CSharp) Метод

        private void ManipulatorControl_Paint( object sender, PaintEventArgs e )
        {
            Graphics g = e.Graphics;

            // calculate size of the manipulator's ares
            areaSize = Math.Min( ClientRectangle.Width, ClientRectangle.Height ) - areaMargin * 2;
            areaRadius = areaSize / 2;

            // draw area
            if ( areaSize > 1 )
            {
                if ( isSquareLook )
                {
                    // square looking control
                    int halfAreaSize = areaSize / 2;

                    g.FillRectangle( ( !this.Enabled ) ? disabledBrash : topLeftBackgroundBrush, areaMargin, areaMargin, halfAreaSize, halfAreaSize );
                    g.FillRectangle( ( !this.Enabled ) ? disabledBrash : topRightBackgroundBrush, areaMargin + halfAreaSize, areaMargin, areaSize - halfAreaSize, halfAreaSize );
                    g.FillRectangle( ( !this.Enabled ) ? disabledBrash : bottomLeftBackgroundBrush, areaMargin, areaMargin + halfAreaSize, halfAreaSize, areaSize - halfAreaSize );
                    g.FillRectangle( ( !this.Enabled ) ? disabledBrash : bottomRightBackgroundBrush, areaMargin + halfAreaSize, areaMargin + halfAreaSize,
                        areaSize - halfAreaSize, areaSize - halfAreaSize );

                    g.DrawRectangle( borderPen, areaMargin, areaMargin, areaSize - 1, areaSize - 1 );
                }
                else
                {
                    // round looking control
                    g.FillPie( ( this.Enabled ) ? topRightBackgroundBrush : disabledBrash, areaMargin, areaMargin, areaSize - 1, areaSize - 1, 0, -90 );
                    g.FillPie( ( this.Enabled ) ? topLeftBackgroundBrush : disabledBrash, areaMargin, areaMargin, areaSize - 1, areaSize - 1, -90, -90 );
                    g.FillPie( ( this.Enabled ) ? bottomRightBackgroundBrush : disabledBrash, areaMargin, areaMargin, areaSize - 1, areaSize - 1, 0, 90 );
                    g.FillPie( ( this.Enabled ) ? bottomLeftBackgroundBrush : disabledBrash, areaMargin, areaMargin, areaSize - 1, areaSize - 1, 90, 90 );
                    g.DrawEllipse( borderPen, areaMargin, areaMargin, areaSize - 1, areaSize - 1 );
                }
            }

            // draw axis or not ?
            if ( drawHorizontalAxis )
            {
                g.DrawLine( borderPen, areaMargin, areaMargin + areaRadius, areaMargin + areaSize - 1, areaMargin + areaRadius );
            }
            if ( drawVerticalAxis )
            {
                g.DrawLine( borderPen, areaMargin + areaRadius, areaMargin, areaMargin + areaRadius, areaMargin + areaSize - 1 );
            }

            // calculate manipulator's center point
            int ctrlManipulatorX = (int) (  manipulatatorX * areaRadius ) + areaMargin + areaRadius;
            int ctrlManipulatorY = (int) ( -manipulatatorY * areaRadius ) + areaMargin + areaRadius;

            // draw manipulator
            g.FillEllipse ( ( this.Enabled ) ? manipulatorBrush : disabledBrash,
                ctrlManipulatorX - manipulatorRadius, ctrlManipulatorY - manipulatorRadius,
                manipulatorSize, manipulatorSize );
            g.DrawEllipse( borderPen,
                ctrlManipulatorX - manipulatorRadius, ctrlManipulatorY - manipulatorRadius,
                manipulatorSize, manipulatorSize );
        }