On Thursday 19 August 2010 05:18:10 Tzeng, Tonny wrote: > I am sure the Qt multitouch function works by using the MTF image posted at > http://repo.meego.com/MeeGo/builds/1.0.80/1.0.80.14.20100810.1/handset/ima > ges/meego-handset-ia32-netbook-mtf/ However, per the Qt source code > qt-everywhere-opensource-src-4.7.0-tp/src/gui/kernel/qapplication_x11.cpp, > it seems the QApplicationprivate::initializeMultitouch_sys() only > recognizes devices /dev/input/eventX which reports absolute coordination > values, so my driver (dual touch panel) registers two device nodes, then > it can work with the provided Qt multitouch sample apps (e.g. > fingerpaint).
The current support for multitouch on X inside Qt is preliminary, prior to the
XInput 2.1 multitouch draft approval. This will change now that the draft
exists.
When we wrote multitouch support 18 months ago, there was no X.org protocol to
depend on, hence the reading off /dev/input and/or dealing with non-standard
X.org drivers.
--
Thiago Macieira - thiago (AT) macieira.info - thiago (AT) kde.org
Senior Product Manager - Nokia, Qt Development Frameworks
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