implementing zoom on an image wp7

Question

I am trying to enable zoom capabilities on an image in my wp7 app using either tap or pinch like other app features,ie,map. Most of the posts i've seen relating to this are a it old and am wondering if there is a more recent way to achieve this??

Answer 1

You need to use scale transform.. I can do a blogpost later on if you are interested.for pinch zoom drag flick etc you need to use gesture service from toolkit

private void GestureListener_DragDelta(object sender, DragDeltaGestureEventArgs e)
    {
        scaleTrans.CenterX = (scaleTrans.CenterX - e.HorizontalChange);
        scaleTrans.CenterY = (scaleTrans.CenterY - e.VerticalChange);

        if (scaleTrans.CenterX < 0)
            scaleTrans.CenterX = 0;
        else if (scaleTrans.CenterX > (imgViewer.Height * scaleTrans.ScaleX))
            scaleTrans.CenterX = imgViewer.Height * scaleTrans.ScaleX;

        if(scaleTrans.CenterY < 0)
            scaleTrans.CenterY = 0;
        else if (scaleTrans.CenterY > (imgViewer.Height * scaleTrans.ScaleY))
            scaleTrans.CenterY = imgViewer.Height * scaleTrans.ScaleY;
    }