열이 Blog : )

public partial class Window1 : Window

    {

        private RotateTransform rotateTransform;

        private double angle;

        private double rotate;

        private Vector position;

        public Window1()

        {

            InitializeComponent();

            Loaded += new RoutedEventHandler(Window1_Loaded);

        }

        private void Window1_Loaded(object sender, RoutedEventArgs e)

        {

            vinyl.MouseLeftButtonDown += new MouseButtonEventHandler(vinyl_MouseLeftButtonDown);

            vinyl.MouseMove += new MouseEventHandler(vinyl_MouseMove);

            vinyl.MouseLeftButtonUp += new MouseButtonEventHandler(vinyl_MouseLeftButtonUp);

            rotateTransform = new RotateTransform();

            vinyl.RenderTransform = rotateTransform;

            vinyl.RenderTransformOrigin = new Point(0.5, 0.5);

            position = VisualTreeHelper.GetOffset(vinyl);

            position.X += vinyl.Width / 2;

            position.Y += vinyl.Height / 2;   

        }

        private void vinyl_MouseLeftButtonUp(object sender, MouseButtonEventArgs e)

        {

            Mouse.Capture(vinyl, CaptureMode.None);

        }

        private void vinyl_MouseMove(object sender, MouseEventArgs e)

        {

            if (e.LeftButton == MouseButtonState.Pressed)

            {

                Point currentPoint = e.GetPosition(this);

                double _angle = Math.Atan2(position.Y - currentPoint.Y, position.X - currentPoint.X) *

(180 / Math.PI);

                rotateTransform.Angle = rotate + _angle - angle;

            }

        }

        private void vinyl_MouseLeftButtonDown(object sender, MouseButtonEventArgs e)

        {

            Mouse.Capture(vinyl, CaptureMode.Element);

            Point point = e.GetPosition(this);

            angle = Math.Atan2(position.Y - point.Y, position.X - point.X) * (180 / Math.PI);

            rotate = rotateTransform.Angle;

        }

    }