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Handling multitouch in Windows (like for Surface Pro)


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#1 JohnnyLightwave   Members   -  Reputation: 142

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Posted 08 April 2013 - 05:12 PM

Hi all, I have what I hope is a quick and easy question!

 

On iOS, multitouch is handled by giving each finger touch an ID... it's real simple, as you receive the touch callback, you just query for the ID too.

 

How is this done in Windows 8, for touch devices?  When I intercept WM_MOUSEMOVE or WM_LBUTTONDOWN, how can I determine the ID of the touch so I can properly handle them without confusing the two?

 

Thanks!

John


Edited by JohnnyLightwave, 08 April 2013 - 05:13 PM.


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#2 Nypyren   Crossbones+   -  Reputation: 3412

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Posted 08 April 2013 - 07:38 PM

I haven't used it, but it looks like there is a new message type with this information:

http://msdn.microsoft.com/en-us/library/windows/desktop/dd371406(v=vs.85).aspx

#3 JohnnyLightwave   Members   -  Reputation: 142

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Posted 11 April 2013 - 07:40 PM

Thank you very much... I wasn't able to find this information anywhere else.  I'm infuriated that they made this into a whole new input stream, though... it's going to be a lot of crazy work to fold this into my habits.






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