Dear pygame-users,

I'm writing some basic pygame programs for use in a research study with 
children in schools and I would like to start using a touchscreen laptop with 
them.  My code works fine with a standard mouse but I'm getting strange errors 
when I try with a touchscreen monitor - I would be grateful for any advice at 
all.

The problem is that the mouse position co-ordinates I get from the touchscreen 
don't bear any relation to what I get with a standard mouse.  Its a USB HID 
touchscreen so I had expected it to act like a mouse with one button.  But, for 
example, the following section of code prints appropriate mouse co-ordinates if 
I click the 'normal' mouse, but strange (meaningless?) co-ordinates if I touch 
the touchscreen, even though the mousemotion and mouse button events are 
identified as the correct type.

for event in pygame.event.get():
            print pygame.event.event_name(event.type)
            if event.type==MOUSEBUTTONDOWN:
                print event.pos

My display is set up simply like this: windowSurface = 
pygame.display.set_mode((0, 0), pygame.RESIZABLE, 32)  ... and I'm working in 
Windows for this project. I've already tried updating my drivers and my version 
of directX, and have calibrated the touchscreen using the software provided 
with the laptop - it works fine for other programs.

I'm not an expert programmer so would be grateful for any advice - is there 
something I have missed about setting the display, or about using two input 
devices?  I'm really stuck!

Any advice gratefully received - many thanks,
Caroline

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