Re: How to get pen pressure under Opie?

> PetitePainture uses a patched kernel that has a duplicate touchscreen
> device. I wanted to add a portable way of getting pen pressure for
> inclusion in the OE version of PetitePainture...

Qt/E simulates a mouse based on data of the touchscreen. For it's 
Event-Handling, it uses QMouseEvent. If you look at the documentation of 
this, you won't see a field for pressure.

http://doc.trolltech.com/2.3/qmouseevent.html


So you need to find out if your Paint application can open your touchscreen a 
second time, either via tslib (preferred) or if this doesn't work, then do it 
directly.

So inside your paint program open ts_open() the file getenv("TSLIB_TSDEVICE") 
or /dev/ts. Then connect a QSocketNotifier to this thingy in the activated() 
slot you can ts_read() a "struct ts_sample". Basically, you do something 
similar as in the OE' patched Qt/E, file src/kernel/qwsmouse_qws.cpp, near 
the QT_QWS_TSLIB defines.

This way you get the touch screen data in a raw format. You just won't emit a 
mouseChanged()-Signal with the X/Y-coordinates, but use them on your own, 
together with the pressure.
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