Migrating to Win8 touch in MFC: virtual BOOL OnTouchInput() --> ???

Question

Hi,

I am migrating an MFC application to Win8 Consumer Preview where I e.g. want to use the new pressure property that should be avilable in some POINTER_TOUCH_INFO struct.

Previous code in Win7 was to first call RegisterTouchWindow(TRUE, 0) and then implement OnTouchInput() something like this:

BOOL CStaticTouch::OnTouchInput(CPoint pt, int nInputNumber, int nInputsCount, PTOUCHINPUT pInput)
{
    if ((pInput->dwFlags & TOUCHEVENTF_DOWN) == TOUCHEVENTF_DOWN) // Touch Down event
    {
        ....

Does anyone know how to do this in Win8 and to get a pointer to a POINTER_TOUCH_INFO struct from where I can get e.g. pressure info.

Best regards

/Andreas

Answer 1

You get the POINTER_TOUCH_INFO by passing the pointer ID you get in your WM_POINTER* messages to GetPointerTouchInfo.

I'm not sure if the TOUCHINPUT's dwID that you are getting will be the same pointer ID or not. You probably should update from handling the WM_TOUCH messages to the WM_POINTER* messages if you need the new functionality anyway.

--Rob