Solution for detecting mouse hotplug on QT App area

Reden

I'm finding the solution how to detect the hot-plug event on mouse device on QT application using tslib.

I used below environment variables and it works if I connect the both device touch and mouse before the qt app executed.

export QT_QPA_EGLFS_DISABLE_INPUT="0"
export QT_QPA_EGLFS_TSLIB="1"
export TSLIB_TSDEVICE="/dev/input/event1" // Touch dev
export QT_QPA_EVDEV_MOUSE_PARAMETERS="/dev/input/event4:grab" // Mouse dev

But after then, QT app doesn't recognize the mouse hot plug event.

I figured out the "QEvdevMouseManager" does not add the the call-back for "QDeviceDiscovery::deviceDetected" if I specify the variable "QT_QPA_EVDEV_MOUSE_PARAMETERS".
(qevdevmousemanager.cpp)

I wonder how to make it work without the modification or patch for the qtbase(qevdevmousemanager.cpp).
Someone have any idea?

SGaist

Hi and welcome to devnet,

What version of Qt are you using ?
On what device ?

Reden

@SGaist
Hi,
I'm using QT version 5.10.1 and imx6q yocto bsp.

SGaist

I am not sure whether both TSLIB and EVDEV can be used at the same time. Does it work if you only use EVDEV ?