i.MX ProcessorsのトピックRe: How to set full display for QT project?

How to set full display for QT project?

linux_downey — Thu, 07 Nov 2019 02:24:40 GMT

I'm developing a application with QT5, on my development PC(X86,ubuntu 18.04), The QT application runs OK, it can display for full-screen with the QT API: showFullScreen()

But, after I run the same project on imx8mq-evk, which is the same source code,compiled by cross-compile-tool-chain, It can not display full screen, there always a system title bar which locates on top of screen( Please refer to the picture with attachment).

The evironment is below:

platform : imx8mq-evk

instructions: export GRAPHICS=wayland-egl

./exe -platform ${GRAPHICS} -plugin evdevtouch:/dev/input/event1

I'm sure that it runs ok on my ubuntu, So I think that my QT project is OK.

Could you please tell me how to hide the system bar?

Best regards

downey

Re: How to set full display for QT project?

karangajjar — Thu, 07 Nov 2019 05:03:12 GMT

Hi downey downey ,

Can you let us know which yocto image are you building?

Regards,

Karan Gajjar

Re: How to set full display for QT project?

linux_downey — Thu, 07 Nov 2019 07:53:32 GMT

sorry for providing uncompleted information.
This is image name:

fsl-image-qt5-validation-imx-imx8mqevk-20190923102914.rootfs.sdcard

MACHINE = 'imx8mqevk'
DISTRO = 'fsl-imx-wayland'

Looking forward to your replay again.

Re: How to set full display for QT project?

karangajjar — Mon, 11 Nov 2019 13:22:14 GMT

Hi downey downey,

Did you use wayland or xcb as your QT_QPA_PLATFORM?

Regards,

Karan Gajjar

Re: How to set full display for QT project?

linux_downey — Tue, 12 Nov 2019 01:14:10 GMT

Hi karan gajjar,

Actually I don't understand what does "use wayland or xcb as your QT_QPA_PLATFORM" mean.

In QT development I only used some standard widgets and a few repaint events, not the other extensions of QT, and the compiled executable was executed with instruction:

./exe -platform wayland-egl -plugin evdevtouch:/dev/input/event1

For display I use QGraphicsView *view frame,and call view->showFullScreen() to display the whole UI part.

As you can see above, It works good on ubuntu18.04, but can not display full screen on i.mx8 evk.

Regrads

downey.

Re: How to set full display for QT project?

karangajjar — Tue, 12 Nov 2019 10:06:17 GMT

Hi downey downey,

This seems to be related to Qt.

Please refer to the below thread for more reference:
[QTBUG-68554] QPA wayland-egl: Window full-screen operation stop working - Qt Bug Tracker

Regards,

Karan Gajjar

Re: How to set full display for QT project?

linux_downey — Wed, 13 Nov 2019 09:02:00 GMT

Hi igorpadykov:

It does works with instructions below:

export QT_WAYLAND_SHELL_INTEGRATION=wl-shell

./exe -platform wayland-egl -plugin evdevtouch:/dev/input/event1

Sooooooo appreciate for your nice advice.

Best regards

downey