Qt and touch functionality

[rishiraj]

Hi everyone.
got a few questions on touch functionality on Qt.
1)If I want to develop a touch application,do I have to use Qt for embedded linux?I have Qt for linux/x11 in my PC.

From what I have understood(ofcourse,I might be wrong) ,I think that to develop any touch sensitive application for a desktop system,I will have to use Qt for linux/x11 and if I want to develop touch applications for PDAs,Mobiles,I would have to use Qt for embedded Linux.Please correct me if I am wrong or if I am missing out on anything.


2)won't an application built using Qt for linux/x11 function when ported to a touchscreen device (like a touch senstive mobile phone or touch senstive PC )?

I think it should work but am confused about the need for 'tslib'.Please give me some idea on this.I would appreciate some help on this topic.



3)Are APIs for 'Qt on linux/x11' and 'Qt for embedded linux' different?

Trolltech has a download link for Qt on linux/x11 and one for Qt for embedded linux.What's the difference in the APIs and if there's no difference in APIs then,where's the difference?

Looking forward to your answers.
Thanks in advance.

[wysota]

Hi everyone.
got a few questions on touch functionality on Qt.
1)If I want to develop a touch application,do I have to use Qt for embedded linux?I have Qt for linux/x11 in my PC.

No, if your X11 is configured to handle the touch screen, Qt will see it as a regular pointing device.

From what I have understood(ofcourse,I might be wrong) ,I think that to develop any touch sensitive application for a desktop system,I will have to use Qt for linux/x11 and if I want to develop touch applications for PDAs,Mobiles,I would have to use Qt for embedded Linux.Please correct me if I am wrong or if I am missing out on anything.

Yeeees... and nooo...

Qt/Embedded is mainly for systems that can't run X11. If you have a PDA that can handle X11, you can run Qt/X11 on it.

2)won't an application built using Qt for linux/x11 function when ported to a touchscreen device (like a touch senstive mobile phone or touch senstive PC )?

It will work fine, just remember a smaller screen might require a different user interface and use of globalStrut() in case of touch screen based devices.

3)Are APIs for 'Qt on linux/x11' and 'Qt for embedded linux' different?

Qt/Embedded has an additional layer for where Qt/X11 relies on X11 (like the windowing system). Apart from that and few other things it's basically the same.

Trolltech has a download link for Qt on linux/x11 and one for Qt for embedded linux.What's the difference in the APIs and if there's no difference in APIs then,where's the difference?

There is almost no difference in the API. The difference is mostly in the configuration script and build environment.

Sorry for such a late response but maybe it's still helpful