Zooming To Mouse Point With ScrollView and ViewBox in Wpf

Question

I have some paths drawn to the screen in wpf. The coordinates being used are quite small so they have been made to fill the screen with a view box. I am now trying to implem

Answer 1

Solved it changed the back code for zooming the View to:

if (e.Delta > 0)
        {
            if (CustomDrawingElement != null)
            {
                //zoom

                _zoomScale++; //increase it now that we have zoomed
                VisualisationBox.Width = _originalDimensions.X * (_zoomScale);
                VisualisationBox.Height = _originalDimensions.Y * (_zoomScale);

                ScrollerDimensions.Content = VisualisationScroller.ActualWidth + "x" + VisualisationScroller.ActualHeight;
                BoxDimensions.Content = VisualisationBox.ActualWidth + "x" + VisualisationBox.ActualHeight;

                var mousePosition = e.GetPosition(MasterGrid);
                mousePosition = MasterGrid.TransformToVisual(VisualisationBox).Transform(mousePosition);

                ScrolledPoint.Content = mousePosition.X + "," + mousePosition.Y;
                VisualisationScroller.ScrollToHorizontalOffset(mousePosition.X);
                VisualisationScroller.ScrollToVerticalOffset(mousePosition.Y);

            }
        }
        if (e.Delta < 0)
        {
            if (_zoomScale > 1) //stops you from zooming out too much
            {
                if (CustomDrawingElement != null)
                {
                    var mousePosition = e.GetPosition(MasterGrid);

                    _zoomScale -= 1; //decrease the zoom
                    VisualisationBox.Width = VisualisationBox.Width - _originalDimensions.X;
                    VisualisationBox.Height = VisualisationBox.Height - _originalDimensions.Y;
                    mousePosition = MasterGrid.TransformToVisual(VisualisationBox).Transform(mousePosition);
                    mousePosition = new Point(mousePosition.X - _originalDimensions.X, mousePosition.Y - _originalDimensions.Y);

                    VisualisationScroller.ScrollToHorizontalOffset(mousePosition.X);
                    VisualisationScroller.ScrollToVerticalOffset(mousePosition.Y);
                }
            }
        }

        e.Handled = true;

If anyone is interested HERE is the finished solution file with panning implemented too.