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

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  • F Offline
    F Offline
    Foufy
    wrote on 30 Apr 2019, 09:05 last edited by
    #1

    Hi everybody,
    I need to use the VirtualKeyboard on a Raspberry Pi 3 running in boot2qt. But my current application is based on widget (not QML). I saw (and read) that virtualKeyboard not working in that configuration. It is necessary to use QtQuick.
    So I need to code my one QLineEdit which integrate a QML code to open virtual keyboard and integrate it using QQuickWidget class. But because I'm a noob in QML I need some help.

    Anyone can help me?.. Thank you

    R 1 Reply Last reply 30 Apr 2019, 09:52
    0
    • F Foufy
      30 Apr 2019, 09:05

      Hi everybody,
      I need to use the VirtualKeyboard on a Raspberry Pi 3 running in boot2qt. But my current application is based on widget (not QML). I saw (and read) that virtualKeyboard not working in that configuration. It is necessary to use QtQuick.
      So I need to code my one QLineEdit which integrate a QML code to open virtual keyboard and integrate it using QQuickWidget class. But because I'm a noob in QML I need some help.

      Anyone can help me?.. Thank you

      R Offline
      R Offline
      raven-worx
      Moderators
      wrote on 30 Apr 2019, 09:52 last edited by
      #2

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

      So I need to code my one QLineEdit which integrate a QML code to open virtual keyboard and integrate it using QQuickWidget class.

      this way you also wont be able to achieve what you want, since the focus scope is not shared between QML and QtWidgets.
      So even if you would be able to show the keyboard. The pressed keys won't be send to the QWidget having the input focus

      --- 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

      1 Reply Last reply
      1
      • F Offline
        F Offline
        Foufy
        wrote on 30 Apr 2019, 18:51 last edited by
        #3

        You say that their is no solution to use virtualkeyboard on widget-based app on boot2qt?!

        R 1 Reply Last reply 30 Apr 2019, 19:18
        0
        • F Foufy
          30 Apr 2019, 18:51

          You say that their is no solution to use virtualkeyboard on widget-based app on boot2qt?!

          R Offline
          R Offline
          raven-worx
          Moderators
          wrote on 30 Apr 2019, 19:18 last edited by
          #4

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

          --- 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

          I 1 Reply Last reply 4 Sept 2019, 13:30
          1
          • F Offline
            F Offline
            Foufy
            wrote on 30 Apr 2019, 21:20 last edited by Foufy
            #5

            Ok. To solve the problem I've coded my own virtualkeyboard.
            Thank you

            0_1556664697399_0d2ae3ea-d1fe-48ea-a493-c81315eb894c-image.png

            1 Reply Last reply
            1
            • R raven-worx
              30 Apr 2019, 19:18

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

              I Offline
              I Offline
              IMAN4K
              wrote on 4 Sept 2019, 13:30 last edited by
              #6

              @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.

              R 1 Reply Last reply 4 Sept 2019, 14:37
              0
              • I IMAN4K
                4 Sept 2019, 13:30

                @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.

                R Offline
                R Offline
                raven-worx
                Moderators
                wrote on 4 Sept 2019, 14:37 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

                I 1 Reply Last reply 4 Sept 2019, 15:21
                2
                • R raven-worx
                  4 Sept 2019, 14:37

                  @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.

                  I Offline
                  I Offline
                  IMAN4K
                  wrote on 4 Sept 2019, 15:21 last edited by IMAN4K 9 Apr 2019, 15:25
                  #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

                  R 1 Reply Last reply 4 Sept 2019, 19:26
                  0
                  • I IMAN4K
                    4 Sept 2019, 15:21

                    @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

                    R Offline
                    R Offline
                    raven-worx
                    Moderators
                    wrote on 4 Sept 2019, 19:26 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

                    I 2 Replies Last reply 4 Sept 2019, 20:26
                    2
                    • R raven-worx
                      4 Sept 2019, 19:26

                      @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?

                      I Offline
                      I Offline
                      IMAN4K
                      wrote on 4 Sept 2019, 20:26 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
                      • R raven-worx
                        4 Sept 2019, 19:26

                        @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?

                        I Offline
                        I Offline
                        IMAN4K
                        wrote on 5 Sept 2019, 06:10 last edited by IMAN4K 9 May 2019, 08:40
                        #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
                        
                        R 1 Reply Last reply 9 Sept 2019, 11:54
                        0
                        • I Offline
                          I Offline
                          IMAN4K
                          wrote on 7 Sept 2019, 05:44 last edited by
                          #12

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

                          1 Reply Last reply
                          0
                          • I IMAN4K
                            5 Sept 2019, 06:10

                            @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
                            
                            R Offline
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                            raven-worx
                            Moderators
                            wrote on 9 Sept 2019, 11:54 last edited by raven-worx 9 Sept 2019, 11:57
                            #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

                            I 1 Reply Last reply 9 Sept 2019, 17:01
                            1
                            • R raven-worx
                              9 Sept 2019, 11:54

                              @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?

                              I Offline
                              I Offline
                              IMAN4K
                              wrote on 9 Sept 2019, 17:01 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 :(

                              R 1 Reply Last reply 9 Sept 2019, 18:12
                              0
                              • I IMAN4K
                                9 Sept 2019, 17:01

                                @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 :(

                                R Offline
                                R Offline
                                raven-worx
                                Moderators
                                wrote on 9 Sept 2019, 18:12 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

                                I 1 Reply Last reply 11 Sept 2019, 09:01
                                1
                                • R raven-worx
                                  9 Sept 2019, 18:12

                                  @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?

                                  I Offline
                                  I Offline
                                  IMAN4K
                                  wrote on 11 Sept 2019, 09:01 last edited by IMAN4K 9 Nov 2019, 09:10
                                  #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
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                                    MarKus12
                                    wrote on 14 Feb 2025, 11:46 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
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