Problems with qTouchEvent with different use of qmake

[Crashz83]

Hello
i try to use the QTouchevent to do a pinchzoom on a simple application. (With an touch screen)

In order to understand how does it work i take the sample mouse code :
http://doc.qt.io/qt-4.8/qt-touch-pinchzoom-example.html

But i have two differents results... If i compile my program with :
qmake
make
./mouse

the pinch zoom is working fine.
In the second case, if i compile my program with :

/usr/local/TrollTech/QT4.8.6/bin/qmake
make
./mouse

the pinch zoom doesn't works !
Does anyone can explain to me what is the difference between the use of the native system qmake and the specific Trolltech qmake ?

Thanks you in advance, and sorry for my bad english.

[anda_skoa]

There is likely no difference of qmake itself, but using a different qmake means linking against a different Qt.

I.e. when qmake generates the Makefiles, it will use the include and library paths of "its" Qt.

The Qt you have in /usr/local/TrollTech/QT4.8.6/ might have been built differently, e.g. without touch support.

Cheers,
_

[Crashz83]

Thanks you for your response.

So in this case,
is it possible to recompile my Qt ( /usr/local/TrollTech/QT4.8.6/ ) with touchscreen option?

[anda_skoa]

If touch support had been explciitly disabled then you just don't do that.
If it is disable due to some missing dependency, then you need to find which dependency that is and provide it.

Which version of Qt is being used by the other qmake?

Cheers,
_

[Crashz83]

Both qmakes uses Qt 4.8.6... But what dependencies there needs?

Cheers,