The Button ID of mouse during MouseMove

[aska]

Hi,

I got a multi-touch screen which reports first touch point as BTN_LFET and second as BTN_EXTRA.
For touch point position, ABS_X, ABX_Y is for the position of first point and ABS_RX, ABS_RY is for the position of second point.

For now, I modified qmouse_linuxinput.cpp for using this device, and I convert QMouseEvent into Qtouchevent
in my application.

My question is when I get the QEvent::MouseMove event, the button always returns zero (QT's document confirms it)
So I can't know the move position is for which finger touch point.

How can I modify kernel of QT to return the button ID during mouse moving?
Or there is a better way to get button ID during mouse moving?

Sorry for my English and thanks for your kindly reply :)