Hi

I will like to add pinch zoom to the content of textblock in my app for users to increase and decrease the font size as they wish. I have written some code for it but to my amazement it's not working, this is the code below kindly guide me

Xaml



            

           
               
                    The life of Enoch Adejare Adeboye is a fulfillment of the scriptures in Zechariah 4: 10 which declare, "despise not the days of small beginnings.
                    

                   
                       
                   
                   
                       
                   
                    
               
           

       

Xaml.cs

private void OnPinchStarted(object sender, PinchStartedGestureEventArgs e)
        {
            var text = sender as TextBlock;
            var transform = text.RenderTransform as CompositeTransform;
            angle = transform.Rotation;
            scale = transform.ScaleX;
        }

        private void OnPinchDelta(object sender, PinchGestureEventArgs e)
        {
            var text = sender as TextBlock;
            var transform = text.RenderTransform as CompositeTransform;
            transform.Rotation = angle + e.TotalAngleDelta;
            transform.ScaleX = scale * e.DistanceRatio;
            transform.ScaleY = scale * e.DistanceRatio;
        }

        private void GestureListener_DoubleTap(object sender, GestureEventArgs e)
        {
            var text = sender as TextBlock;
            var transform = text.RenderTransform as CompositeTransform;
            transform.ScaleX = transform.ScaleY = 1;
        }

        private void GestureListener_DragDelta(object sender, DragDeltaGestureEventArgs e)
        {
            var text = sender as TextBlock;
            var transform = text.RenderTransform as CompositeTransform;
            transform.TranslateX += e.HorizontalChange;
            transform.TranslateY += e.VerticalChange;
        }

        public double angle { get; set; }

        public double scale { get; set; }

Thank you in advance and reply soon