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Need help to code VirtualKeyboard using QQuickWidget on Widget-based app

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  • IMAN4KI IMAN4K

    @raven-worx said in Need help to code VirtualKeyboard using QQuickWidget on Widget-based app:

    @Foufy
    No, not with EGLFS (what only allowes 1 window). Which is used by boot2qt AFAIK.

    Hi @raven-worx
    [Just don't want to create a new topic for this!]

    So if we don't configure Qt with EGLFS and instead enable these options on cross-compile:

    • EGL on X11
    • XCB

    And having windowed applications, we're able to use VK in form of Desktop Integration Method?

    Regards.

    raven-worxR Offline
    raven-worxR Offline
    raven-worx
    Moderators
    wrote on last edited by
    #7

    @iman4k said in Need help to code VirtualKeyboard using QQuickWidget on Widget-based app:

    And having windowed applications, we're able to use VK in form of Desktop Integration Method?

    yes, if you want to use it with QtWidgets.
    An InputPanel QML element can also show a virtualkeyboard using EGLFS.

    --- SUPPORT REQUESTS VIA CHAT WILL BE IGNORED ---
    If you have a question please use the forum so others can benefit from the solution in the future

    IMAN4KI 1 Reply Last reply
    2
    • raven-worxR raven-worx

      @iman4k said in Need help to code VirtualKeyboard using QQuickWidget on Widget-based app:

      And having windowed applications, we're able to use VK in form of Desktop Integration Method?

      yes, if you want to use it with QtWidgets.
      An InputPanel QML element can also show a virtualkeyboard using EGLFS.

      IMAN4KI Offline
      IMAN4KI Offline
      IMAN4K
      wrote on last edited by IMAN4K
      #8

      @raven-worx said

      yes, if you want to use it with QtWidgets.
      An InputPanel QML element can also show a virtualkeyboard using EGLFS.

      So far so good!
      I have managed to cross compile Qt v5.12.3 on Raspbian stretch@Raspberry Pi3B+ without EGLFS and with EGL on X11 and all Virtual Keyboard plugins are deployed correctly based on Deployment Guide BUT VK won't run and if we set QT_DEBUG_PLUGINS to true only $$[QT_INSTALL_PLUGINS]/platforminputcontexts/libqtvirtualkeyboardplugin.so is loaded(full log).
      So do you have any clue about what's wrong?
      Regards.

      Hope to get to a solution on this topic for anyone else

      raven-worxR 1 Reply Last reply
      0
      • IMAN4KI IMAN4K

        @raven-worx said

        yes, if you want to use it with QtWidgets.
        An InputPanel QML element can also show a virtualkeyboard using EGLFS.

        So far so good!
        I have managed to cross compile Qt v5.12.3 on Raspbian stretch@Raspberry Pi3B+ without EGLFS and with EGL on X11 and all Virtual Keyboard plugins are deployed correctly based on Deployment Guide BUT VK won't run and if we set QT_DEBUG_PLUGINS to true only $$[QT_INSTALL_PLUGINS]/platforminputcontexts/libqtvirtualkeyboardplugin.so is loaded(full log).
        So do you have any clue about what's wrong?
        Regards.

        Hope to get to a solution on this topic for anyone else

        raven-worxR Offline
        raven-worxR Offline
        raven-worx
        Moderators
        wrote on last edited by
        #9

        @iman4k
        did you set QT_IM_MODULE=qtvirtualkeyboard env variable?
        How do you start your application? With what parameters and or platform plugin?
        Do you see your application in your X11 display?

        --- SUPPORT REQUESTS VIA CHAT WILL BE IGNORED ---
        If you have a question please use the forum so others can benefit from the solution in the future

        IMAN4KI 2 Replies Last reply
        2
        • raven-worxR raven-worx

          @iman4k
          did you set QT_IM_MODULE=qtvirtualkeyboard env variable?
          How do you start your application? With what parameters and or platform plugin?
          Do you see your application in your X11 display?

          IMAN4KI Offline
          IMAN4KI Offline
          IMAN4K
          wrote on last edited by
          #10

          @raven-worx said in Need help to code VirtualKeyboard using QQuickWidget on Widget-based app:

          @iman4k
          did you set QT_IM_MODULE=qtvirtualkeyboard env variable?
          How do you start your application? With what parameters and or platform plugin?
          Do you see your application in your X11 display?

          • Yes, before QApplication creation in the main function:
            • qputenv("QT_IM_MODULE", QByteArray("qtvirtualkeyboard"));
          • ./<my-app> -platform xcb
          • Not sure about seeing application on X11 display but yes my app running normally(windowed) just like the desktop-x86 one.
          1 Reply Last reply
          0
          • raven-worxR raven-worx

            @iman4k
            did you set QT_IM_MODULE=qtvirtualkeyboard env variable?
            How do you start your application? With what parameters and or platform plugin?
            Do you see your application in your X11 display?

            IMAN4KI Offline
            IMAN4KI Offline
            IMAN4K
            wrote on last edited by IMAN4K
            #11

            @raven-worx

            Also for more debugging when I set qputenv("QT_LOGGING_RULES", QByteArray("qt.virtualkeyboard=true"));, the VK's logs
            for raspberry is like this :

            qt.virtualkeyboard: Loading extension "japanese"
            qt.virtualkeyboard: Loading extension "traditional_chinese"
            qt.virtualkeyboard: Loading extension "pinyin"
            qt.virtualkeyboard: Loading extension "thai"
            qt.virtualkeyboard: Loading extension "hangul"
            qt.virtualkeyboard: PlatformInputContext::setFocusObject(): QLineEdit(0x7ec96790)
            qt.virtualkeyboard: PlatformInputContext::update(): QFlags<Qt::InputMethodQuery>(ImQueryAll)
            qt.virtualkeyboard: PlatformInputContext::update(): QFlags<Qt::InputMethodQuery>(ImInputItemClipRectangle)
            qt.virtualkeyboard: PlatformInputContext::setFocusObject(): QLineEdit(0x7ec96790)
            qt.virtualkeyboard: PlatformInputContext::update(): QFlags<Qt::InputMethodQuery>(ImQueryAll)
            qt.virtualkeyboard: PlatformInputContext::update(): QFlags<Qt::InputMethodQuery>(ImQueryAll)
            qt.virtualkeyboard: PlatformInputContext::update(): QFlags<Qt::InputMethodQuery>(ImQueryAll)
            qt.virtualkeyboard: PlatformInputContext::update(): QFlags<Qt::InputMethodQuery>(ImQueryAll)
            qt.virtualkeyboard: PlatformInputContext::showInputPanel()
            qt.virtualkeyboard: PlatformInputContext::commit()
            qt.virtualkeyboard: PlatformInputContext::commit()
            qt.virtualkeyboard: PlatformInputContext::hideInputPanel()
            qt.virtualkeyboard: PlatformInputContext::setFocusObject(): QObject(0x0)
            qt.virtualkeyboard: PlatformInputContext::update(): QFlags<Qt::InputMethodQuery>(ImQueryAll)
            

            So showInputPanel() is called but actually is not shown! and couldn't find the reason.
            And these logs are for running on Desktop:

            qt.virtualkeyboard: PlatformInputContext::update(): QFlags<Qt::InputMethodQuery>(ImInputItemClipRectangle)
            qt.virtualkeyboard: PlatformInputContext::setFocusObject(): QLineEdit(0x7ffe8952fa60)
            qt.virtualkeyboard: PlatformInputContext::update(): QFlags<Qt::InputMethodQuery>(ImQueryAll)
            qt.virtualkeyboard: InputContext::setFocus(): true
            qt.virtualkeyboard: PlatformInputContext::setFocusObject(): QLineEdit(0x7ffe8952fa60)
            qt.virtualkeyboard: PlatformInputContext::update(): QFlags<Qt::InputMethodQuery>(ImQueryAll)
            qt.virtualkeyboard: InputContext::setLocale(): "en_GB"
            qt.virtualkeyboard: PlatformInputContext::setLocale(): QLocale(English, Latin, UnitedKingdom)
            qt.virtualkeyboard: InputEngine::setInputMethod(): QtVirtualKeyboard::PlainInputMethod(0x1110b60)
            qt.virtualkeyboard: InputEngine::setInputMode(): 0
            qt.virtualkeyboard: PlatformInputContext::update(): QFlags<Qt::InputMethodQuery>(ImQueryAll)
            qt.virtualkeyboard: PlatformInputContext::showInputPanel()
            qt.virtualkeyboard: DesktopInputPanel::repositionView(): QRect(55,24 1865x1056)
            qt.virtualkeyboard: PlatformInputContext::hideInputPanel()
            qt.virtualkeyboard: PlatformInputContext::commit()
            qt.virtualkeyboard: PlatformInputContext::commit()
            qt.virtualkeyboard: PlatformInputContext::setFocusObject(): QObject(0x0)
            qt.virtualkeyboard: PlatformInputContext::update(): QFlags<Qt::InputMethodQuery>(ImQueryAll)
            qt.virtualkeyboard: InputContext::setFocus(): false
            qt.virtualkeyboard: PlatformInputContext::update(): QFlags<Qt::InputMethodQuery>(ImInputItemClipRectangle)
            qt.virtualkeyboard: PlatformInputContext::setFocusObject(): QLineEdit(0x7ffe8952fa60)
            qt.virtualkeyboard: PlatformInputContext::update(): QFlags<Qt::InputMethodQuery>(ImQueryAll)
            qt.virtualkeyboard: InputContext::setFocus(): true
            qt.virtualkeyboard: PlatformInputContext::setFocusObject(): QLineEdit(0x7ffe8952fa60)
            qt.virtualkeyboard: PlatformInputContext::update(): QFlags<Qt::InputMethodQuery>(ImQueryAll)
            qt.virtualkeyboard: PlatformInputContext::commit()
            qt.virtualkeyboard: PlatformInputContext::commit()
            qt.virtualkeyboard: InputContext::setFocus(): false
            
            raven-worxR 1 Reply Last reply
            0
            • IMAN4KI Offline
              IMAN4KI Offline
              IMAN4K
              wrote on last edited by
              #12

              @raven-worx
              Any idea or hint would be appreciated.
              Regards.

              1 Reply Last reply
              0
              • IMAN4KI IMAN4K

                @raven-worx

                Also for more debugging when I set qputenv("QT_LOGGING_RULES", QByteArray("qt.virtualkeyboard=true"));, the VK's logs
                for raspberry is like this :

                qt.virtualkeyboard: Loading extension "japanese"
                qt.virtualkeyboard: Loading extension "traditional_chinese"
                qt.virtualkeyboard: Loading extension "pinyin"
                qt.virtualkeyboard: Loading extension "thai"
                qt.virtualkeyboard: Loading extension "hangul"
                qt.virtualkeyboard: PlatformInputContext::setFocusObject(): QLineEdit(0x7ec96790)
                qt.virtualkeyboard: PlatformInputContext::update(): QFlags<Qt::InputMethodQuery>(ImQueryAll)
                qt.virtualkeyboard: PlatformInputContext::update(): QFlags<Qt::InputMethodQuery>(ImInputItemClipRectangle)
                qt.virtualkeyboard: PlatformInputContext::setFocusObject(): QLineEdit(0x7ec96790)
                qt.virtualkeyboard: PlatformInputContext::update(): QFlags<Qt::InputMethodQuery>(ImQueryAll)
                qt.virtualkeyboard: PlatformInputContext::update(): QFlags<Qt::InputMethodQuery>(ImQueryAll)
                qt.virtualkeyboard: PlatformInputContext::update(): QFlags<Qt::InputMethodQuery>(ImQueryAll)
                qt.virtualkeyboard: PlatformInputContext::update(): QFlags<Qt::InputMethodQuery>(ImQueryAll)
                qt.virtualkeyboard: PlatformInputContext::showInputPanel()
                qt.virtualkeyboard: PlatformInputContext::commit()
                qt.virtualkeyboard: PlatformInputContext::commit()
                qt.virtualkeyboard: PlatformInputContext::hideInputPanel()
                qt.virtualkeyboard: PlatformInputContext::setFocusObject(): QObject(0x0)
                qt.virtualkeyboard: PlatformInputContext::update(): QFlags<Qt::InputMethodQuery>(ImQueryAll)
                

                So showInputPanel() is called but actually is not shown! and couldn't find the reason.
                And these logs are for running on Desktop:

                qt.virtualkeyboard: PlatformInputContext::update(): QFlags<Qt::InputMethodQuery>(ImInputItemClipRectangle)
                qt.virtualkeyboard: PlatformInputContext::setFocusObject(): QLineEdit(0x7ffe8952fa60)
                qt.virtualkeyboard: PlatformInputContext::update(): QFlags<Qt::InputMethodQuery>(ImQueryAll)
                qt.virtualkeyboard: InputContext::setFocus(): true
                qt.virtualkeyboard: PlatformInputContext::setFocusObject(): QLineEdit(0x7ffe8952fa60)
                qt.virtualkeyboard: PlatformInputContext::update(): QFlags<Qt::InputMethodQuery>(ImQueryAll)
                qt.virtualkeyboard: InputContext::setLocale(): "en_GB"
                qt.virtualkeyboard: PlatformInputContext::setLocale(): QLocale(English, Latin, UnitedKingdom)
                qt.virtualkeyboard: InputEngine::setInputMethod(): QtVirtualKeyboard::PlainInputMethod(0x1110b60)
                qt.virtualkeyboard: InputEngine::setInputMode(): 0
                qt.virtualkeyboard: PlatformInputContext::update(): QFlags<Qt::InputMethodQuery>(ImQueryAll)
                qt.virtualkeyboard: PlatformInputContext::showInputPanel()
                qt.virtualkeyboard: DesktopInputPanel::repositionView(): QRect(55,24 1865x1056)
                qt.virtualkeyboard: PlatformInputContext::hideInputPanel()
                qt.virtualkeyboard: PlatformInputContext::commit()
                qt.virtualkeyboard: PlatformInputContext::commit()
                qt.virtualkeyboard: PlatformInputContext::setFocusObject(): QObject(0x0)
                qt.virtualkeyboard: PlatformInputContext::update(): QFlags<Qt::InputMethodQuery>(ImQueryAll)
                qt.virtualkeyboard: InputContext::setFocus(): false
                qt.virtualkeyboard: PlatformInputContext::update(): QFlags<Qt::InputMethodQuery>(ImInputItemClipRectangle)
                qt.virtualkeyboard: PlatformInputContext::setFocusObject(): QLineEdit(0x7ffe8952fa60)
                qt.virtualkeyboard: PlatformInputContext::update(): QFlags<Qt::InputMethodQuery>(ImQueryAll)
                qt.virtualkeyboard: InputContext::setFocus(): true
                qt.virtualkeyboard: PlatformInputContext::setFocusObject(): QLineEdit(0x7ffe8952fa60)
                qt.virtualkeyboard: PlatformInputContext::update(): QFlags<Qt::InputMethodQuery>(ImQueryAll)
                qt.virtualkeyboard: PlatformInputContext::commit()
                qt.virtualkeyboard: PlatformInputContext::commit()
                qt.virtualkeyboard: InputContext::setFocus(): false
                
                raven-worxR Offline
                raven-worxR Offline
                raven-worx
                Moderators
                wrote on last edited by raven-worx
                #13

                @iman4k
                seems you somehow loosing input-focus in your non-working case?
                are you running the exact same application on desktop and on your pi?
                any other output in the console?

                --- SUPPORT REQUESTS VIA CHAT WILL BE IGNORED ---
                If you have a question please use the forum so others can benefit from the solution in the future

                IMAN4KI 1 Reply Last reply
                1
                • raven-worxR raven-worx

                  @iman4k
                  seems you somehow loosing input-focus in your non-working case?
                  are you running the exact same application on desktop and on your pi?
                  any other output in the console?

                  IMAN4KI Offline
                  IMAN4KI Offline
                  IMAN4K
                  wrote on last edited by
                  #14

                  @raven-worx said in Need help to code VirtualKeyboard using QQuickWidget on Widget-based app:

                  @iman4k
                  seems you somehow loosing input-focus in your non-working case?
                  are you running the exact same application on desktop and on your pi?
                  any other output in the console?

                  • No, input focus is just fine and the lineedit will get focus as expected(the last 3 line of logs in the non-working case is because I clicked on the outside of widget area at the end)
                  • Yes, the exact same application is running on Desktop and also on Embedded(raspberry) kit
                  • Nothing more than those logs I mentioned!

                  This is somehow strange, it took 1 week struggling on this :(

                  raven-worxR 1 Reply Last reply
                  0
                  • IMAN4KI IMAN4K

                    @raven-worx said in Need help to code VirtualKeyboard using QQuickWidget on Widget-based app:

                    @iman4k
                    seems you somehow loosing input-focus in your non-working case?
                    are you running the exact same application on desktop and on your pi?
                    any other output in the console?

                    • No, input focus is just fine and the lineedit will get focus as expected(the last 3 line of logs in the non-working case is because I clicked on the outside of widget area at the end)
                    • Yes, the exact same application is running on Desktop and also on Embedded(raspberry) kit
                    • Nothing more than those logs I mentioned!

                    This is somehow strange, it took 1 week struggling on this :(

                    raven-worxR Offline
                    raven-worxR Offline
                    raven-worx
                    Moderators
                    wrote on last edited by
                    #15

                    @iman4k
                    then i guess either something in your application or your used Qt installation.
                    Just to amke sure: I assume - becasue of the log output - the qtvirtualkeyboard plugin is available on your Pi?
                    are you also using QML in your application or is it a pure QtWidget application?

                    --- SUPPORT REQUESTS VIA CHAT WILL BE IGNORED ---
                    If you have a question please use the forum so others can benefit from the solution in the future

                    IMAN4KI 1 Reply Last reply
                    1
                    • raven-worxR raven-worx

                      @iman4k
                      then i guess either something in your application or your used Qt installation.
                      Just to amke sure: I assume - becasue of the log output - the qtvirtualkeyboard plugin is available on your Pi?
                      are you also using QML in your application or is it a pure QtWidget application?

                      IMAN4KI Offline
                      IMAN4KI Offline
                      IMAN4K
                      wrote on last edited by IMAN4K
                      #16

                      @raven-worx said in Need help to code VirtualKeyboard using QQuickWidget on Widget-based app:

                      @iman4k
                      then i guess either something in your application or your used Qt installation.
                      Just to amke sure: I assume - becasue of the log output - the qtvirtualkeyboard plugin is available on your Pi?
                      are you also using QML in your application or is it a pure QtWidget application?

                      • Yes, these are deployed on the pi side in install step of cross-compile:

                        • /usr/local/qt5pi/plugins/platforminputcontexts/libqtvirtualkeyboardplugin.so
                        • /usr/local/qt5pi/qml/QtQuick/VirtualKeyboard/libqtquickvirtualkeyboardplugin.so
                        • /usr/local/qt5pi/qml/QtQuick/Layouts/libqquicklayoutsplugin.so
                        • /usr/local/qt5pi/lib/libQt5VirtualKeyboard.so

                        So I assume the plugin is available.

                      • It's a simple QtWidgets application:

                      #include <QtWidgets>
                      
                      int main(int argc, char *argv[]) {
                          qputenv("QT_IM_MODULE", QByteArray("qtvirtualkeyboard"));
                          qputenv("QT_LOGGING_RULES", QByteArray("qt.virtualkeyboard=true"));
                          QApplication a(argc, argv);
                          QMainWindow w;
                          QLineEdit edit(&w);
                          edit.move(50, 50);
                          w.show();
                          return a.exec();
                      }
                      

                      Is this problem related to Openbox WindowManager?
                      I'm also curious to know why DesktopInputPanel::repositionView(): QRect(55,24 1865x1056) is not called after PlatformInputContext::showInputPanel() in raspberry?

                      1 Reply Last reply
                      0
                      • M Offline
                        M Offline
                        MarKus12
                        wrote on last edited by MarKus12
                        #17

                        @IMAN4K

                        Hi,
                        similar problem exists here.
                        Did you eventually found a solution for the problem, that you remember?

                        I run into it on a buildroot issue without desktop manager.
                        Currently I suspect a problem with the interpreting system input events by QApplication.
                        Seems that QGuiApplication does something different.

                        1 Reply Last reply
                        0

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