平移videoSourcePlayer Aforge

Question

我正在使用Aforge的videoSourcePlayer。我有可以放大和缩小的代码，但是现在我想在缩放后进行平移。因此，我想发生的是，放大后，您可以单击一个位置，然后平移将您单击的位置放在屏幕中央。 这是我的代码：

  private void VideoSourcePlayer_Paint( object sender, PaintEventArgs e )
    {
        if ( !Visible )
        {
            return;
        }

        // is it required to update control's size/position
        if ( ( needSizeUpdate ) || ( firstFrameNotProcessed ) )
        {
            UpdatePosition( );
            needSizeUpdate = false;
        }

        lock ( sync )
        {
            Graphics  g = e.Graphics;
            Rectangle rect = this.ClientRectangle;
            Pen       borderPen = new Pen( borderColor, 1 );

            // draw rectangle
            g.DrawRectangle( borderPen, rect.X, rect.Y, rect.Width - 1, rect.Height - 1 );

            if ( videoSource != null )
            {
                if ( ( currentFrame != null ) && ( lastMessage == null ) )
                {
                    int width = (int)(this.Width * this.zoomFactor);
                    int height = (int)(this.Height * this.zoomFactor);
                    float x = (rect.Width < width) ? (this.zoomPosition.X * (-1) * (this.zoomFactor - 1)) : (rect.Width - width) / 2;
                    float y = (rect.Height < height) ? (this.zoomPosition.Y * (-1) * (this.zoomFactor - 1)) : (rect.Height - height) / 2;

                    if (Panflag == true && zoomFactor >1)
                    {
                        width = (int)(this.Width* this.zoomFactor);
                        height = (int)(this.Height * this.zoomFactor);
                        x = (rect.Width < width) ? this.PanPosition.X * (-1) * (this.PanFactor - 1) : (rect.Width - width) / 2;
                        y = (rect.Height < height) ? this.PanPosition.Y * (-1) * (this.PanFactor - 1) : (rect.Height - height) / 2;
                    }
                    else
                    {
                        this.PanPosition.X =(int) x;
                        this.PanPosition.Y =(int) y;
                        this.PanFactor = this.zoomFactor;
                    }

                    Bitmap frame = ( convertedFrame != null ) ? convertedFrame : currentFrame;

                    if ( keepRatio )
                    {
                        double ratio = (double) frame.Width / frame.Height;
                        Rectangle newRect = rect;

                        if ( rect.Width < rect.Height * ratio )
                        {
                            newRect.Height = (int) ( rect.Width / ratio );
                        }
                        else
                        {
                            newRect.Width = (int) ( rect.Height * ratio );
                        }

                        newRect.X = ( rect.Width - newRect.Width ) / 2;
                        newRect.Y = ( rect.Height - newRect.Height ) / 2;



                            g.DrawImage(currentFrame, x, y, width, height);


                       // g.DrawImage( frame, newRect.X + 1, newRect.Y + 1, newRect.Width - 2, newRect.Height - 2);
                    }
                    else
                    {
                        // draw current frame

                            g.DrawImage(currentFrame, x, y, width, height);

                        // draw current frame
                       // g.DrawImage( frame, rect.X + 1, rect.Y + 1, rect.Width - 2, rect.Height - 2);
                    }

                    firstFrameNotProcessed = false;
                }
                else
                {
                    // create font and brush
                    SolidBrush drawBrush = new SolidBrush( this.ForeColor );

                    g.DrawString( ( lastMessage == null ) ? "Connecting ..." : lastMessage,
                        this.Font, drawBrush, new PointF( 5, 5 ) );

                    drawBrush.Dispose( );
                }
            }

            borderPen.Dispose( );
        }
    }
       public void Pan(Point PanPoint)
    {
        this.PanPosition = PanPoint;
        this.PanFactor = 1;
    }

我遇到的问题是放大并尝试平移后，它没有将我单击的位置放在videoSourcePlayer的中央。