How to use virtual keyboard on STM32MP257

[lihuaibin]

Hello,
I want to use a virtual keyboard on STM32MP257 now. Due to the possibility of porting some non Qt applications in the future, it is advisable to avoid using Qt's built-in virtual keyboard as much as possible. Do you have any ideas.
My main application requires the use of Wayland
2. We plan to port non Qt applications in the future
3. What virtual keyboard scheme is used in the facerecognition example?

https://wiki.stmicroelectronics.cn/stm32mpu/nsfr_img_auth.php/0/06/Cpp_ovx_face_recognition_application_enrollment.png