Qt 5.15.2 - QtVirtualKeyboard doesn't work with Wayland-egl

fbelloni

Hi All,
I would like to integrate the QtVirtualKeyboard in the "simplebrowser" example available in QtWebEngine (Qt 5.15.2).
My embedded platform is wayland-egl (Linux).

I added the following line in the main.cpp file:

int main(int argc, char **argv)
{
    QCoreApplication::setOrganizationName("QtExamples");
    QCoreApplication::setAttribute(Qt::AA_EnableHighDpiScaling);
    QCoreApplication::setAttribute(Qt::AA_UseHighDpiPixmaps);

    qputenv("QT_IM_MODULE", QByteArray("qtvirtualkeyboard"));

    QApplication app(argc, argv);
    app.setWindowIcon(QIcon(QStringLiteral(":AppLogoColor.png")));

The issue:
when I run the application "simplebrowser" with the following command:

./simplebrowser -platform wayland-egl

I receive the following error:

qt.qpa.wayland: qtvirtualkeyboard currently is not supported at client-side, use QT_IM_MODULE=qtvirtualkeyboard at compositor-side.

When I click on the browser url to enter a new url, the virtual keyboard appears for a while and dissappears immediately.

Any trick to solve this issue?

Ronel_qtmaster

I think you should try it with another plugin.Is it working with a simple Qt quick app? I have it working well on my rpi with yocto

fbelloni

@Ronel_qtmaster Thank you very much for your feedback. No, I haven't tried with Qt Quick. I will try it. Thank you for the advice.

is your RPI a wayland platform?
which Qt version are you using?

Could you provide me some more details on how you have integrate the Qt Virtual Keyboard?

Thank you a lot for your help!

Ronel_qtmaster

@fbelloni OKay you should try with a simple exemple first
i am using Qt 5.12 , my raspberry image is mainly running on EGLFS with Yocto.

Also i did not need this line qputenv("QT_IM_MODULE", QByteArray("qtvirtualkeyboard")); when testing virtual Keyboard on my side

fbelloni

@Ronel_qtmaster Ok, I understand. I think the problem is strictly connected to Wayland (not Eglfs).

The command to run my application is:

./simplebrowser -platform wayland-egl

Not sure I will be able to find a solution. I searched on the web and read several forums. I think no-body is able to run qtvirtualkeyboard on wayland.

Ronel_qtmaster

@fbelloni i was talking about EGLFS because QML apps should run normally with EGLFS only.That is what is officially stated.Anyway did you try with a simple app?

fbelloni

@Ronel_qtmaster just tried. unfortunately I have the same issue. The virtual keyboard appears for a while and disappears immediately.

Ronel_qtmaster

@fbelloni then the problem is how you built qtvirtualkeyboard and not absolutely webengine

fbelloni

@Ronel_qtmaster ok. in your opinion, what could I try? I saw this bug report about the virtual keyboard and weston:
https://bugreports.qt.io/browse/QTBUG-94994