How to change the color of stylus ink dynamically on inkcanvas

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C#

WPF

ink

Hi everyone

I need to change the ink color dynamically based on pressure value.

I was able to change the color, but if I apply more pressure on the stylus pen, the color remains constant and does not change as coded. Also if I lift the stylus and apply different amount of pressure the change is seen

I have written this code in the stylus move event

My code:

private void StylusMoving(object sender, StylusEventArgs e)
        {
            StylusPointCollection stylusPoints = null;
            stylusPoints = e.GetStylusPoints(inkCanv);
            float currentPressure = stylusPoints[0].PressureFactor;
            txtPressure.Text = currentPressure.ToString();
           System.Windows.Ink.DrawingAttributes inkDA = new System.Windows.Ink.DrawingAttributes();
            inkDA.Height = 4;
            inkDA.Width = 4;
            inkDA.FitToCurve = false;
            int press = Convert.ToInt32(currentPressure * 100);
            if (press >= 0 && press <= 20)
            { inkDA.Color = Colors.Green; }
            else if (press >= 21 && press <= 40)
            { inkDA.Color = Colors.Orange; }
            else if (press >= 41 && press <= 60)
            { inkDA.Color = Colors.Blue; }
            else if (press >= 61 && press <= 80)
            { inkDA.Color = Colors.Red; }
            else if (press >= 81 && press <= 100)
            { inkDA.Color = Colors.Black; }
            else { inkDA.Color = Colors.Green; }

           inkCanv.DefaultDrawingAttributes = inkDA;

        }

Please help

Thanks in advance