I am going to mark this topic as Solved. I used a lot of the methodologies from this topic. I used 4 lineedits because I'm building a plugin and I want the user to be able to enter each input mask individually.

Hi,

What driver are you using ? Did you check if there where any need to calibrate anything ?

I solve it I use the same thing

ui->comboBox->view()->setVerticalScrollMode(QAbstractItemView::ScrollPerPixel);

if there is a better solution please post it
Thanks

Replying to myself as I've found the solution. If other people face the same issue they may find this to be the fix.

under /etc/environment I had the line: QWS_MOUSE_PROTO="Tslib:/dev/input/event1"

However, this didn't seem to work. I'm not entirely sure why, I'll probably look into it.

If, however, I use: export QWS_MOUSE_PROTO="Tslib:/dev/input/event1" , and then run the application, it functions correctly.

no the same one.
first i run my program . it doesn't work. then run ts_calibrate but it works. then run demo in mini2440 but the touch was worked, but when i run the example of the Qt4.6.3 in example folder (/opt/qt....4.6.3/example/...) the touch doesn't work. all of them in one console.
these are my system info:
[root@FriendlyARM /udisk]# cd /dev/input/
[root@FriendlyARM input]# ls
event0 mice

[root@FriendlyARM input]# cat event0
7�G7H
�7!H7��7&am
p;#65533;�
�7��7.�

after each touch show me characters like these(my touch work)

===============================================

i change this to:
export QWS_MOUSE_PROTO="tslib:/dev/input/event0
IntelliMouse:/dev/input/mice"
but nothing happen.