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Qt 4.8.6 touch is not working

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  • A Offline
    A Offline
    AMOL
    wrote on last edited by
    #1

    Hi developers,
    Need your help to understand qt touch process

    My events are occurring in cat /dev/input/dev whenever I touch on screen
    But when I run ts_calibrate it is not recognise my touch on screen also I have exported required environment variables still it is same

    Can one help with this, thank you in advance....

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    0
    • SGaistS Offline
      SGaistS Offline
      SGaist
      Lifetime Qt Champion
      wrote on last edited by
      #2

      Hi,

      If ts-calibrate does not recognize it as touch screen, it's possible that your device is seen as a mouse.

      Interested in AI ? www.idiap.ch
      Please read the Qt Code of Conduct - https://forum.qt.io/topic/113070/qt-code-of-conduct

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      • A Offline
        A Offline
        AMOL
        wrote on last edited by
        #3

        Hi,

        If ts-calibrate does not recognize it as touch screen, it's possible that your device is seen as a mouse
        Thank you for replying @SGaist ,
        How to check if my device is seen as mouse?
        Coz in ts_calibrate I tried to click points using mouse but none of them get clicked...

        then how to change to recognise as touch only?
        Any suggestions?

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        • SGaistS Offline
          SGaistS Offline
          SGaist
          Lifetime Qt Champion
          wrote on last edited by
          #4

          That's something you should first check with the screen model you are using.

          Interested in AI ? www.idiap.ch
          Please read the Qt Code of Conduct - https://forum.qt.io/topic/113070/qt-code-of-conduct

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          • A Offline
            A Offline
            AMOL
            wrote on last edited by
            #5

            Not getting your point @SGaist
            I am using goodix gt911 touchpad driver which recognises my touch on evetest

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            • SGaistS Offline
              SGaistS Offline
              SGaist
              Lifetime Qt Champion
              wrote on last edited by
              #6

              My point is: at no point did you mention what device you were using nor how it was supposed to be recognized by your system as a touch screen.

              You just added now that it was recognized by evdev.

              What if you disable evdev ?

              By the way, are you locked to that old version of Qt ?
              It has reached end of life a long time ago and you are not even using the latest of the Qt 4 series.

              Interested in AI ? www.idiap.ch
              Please read the Qt Code of Conduct - https://forum.qt.io/topic/113070/qt-code-of-conduct

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              • A Offline
                A Offline
                AMOL
                wrote on last edited by
                #7

                Ohh sorry, I am using friendlyarm arm linux based device
                And that os using qt 4 only that's why we are stuck at qt version 4

                And event are occurring on evdev as well as on cat I put device for touch meaning at kernel level it is working fine
                But at user level it not recognise at all in qt app and in ts_calibrate

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                • A Offline
                  A Offline
                  AMOL
                  wrote on last edited by AMOL
                  #8

                  Is anyone there who can guide me on this?

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                  • SGaistS Offline
                    SGaistS Offline
                    SGaist
                    Lifetime Qt Champion
                    wrote on last edited by
                    #9

                    Did you try to use it like a mouse ?

                    Interested in AI ? www.idiap.ch
                    Please read the Qt Code of Conduct - https://forum.qt.io/topic/113070/qt-code-of-conduct

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                    • A Offline
                      A Offline
                      AMOL
                      wrote on last edited by
                      #10

                      Hi @SGaist ,
                      Somehow I am able to resolve touch issue I am able to touch on my app now only issue is touch is inverted like when I move touch at right pointer move towards left......
                      Can you help me with this ......

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                      • SGaistS Offline
                        SGaistS Offline
                        SGaist
                        Lifetime Qt Champion
                        wrote on last edited by
                        #11

                        What are you using to manage the input ?

                        Interested in AI ? www.idiap.ch
                        Please read the Qt Code of Conduct - https://forum.qt.io/topic/113070/qt-code-of-conduct

                        A 1 Reply Last reply
                        0
                        • SGaistS SGaist

                          What are you using to manage the input ?

                          A Offline
                          A Offline
                          AMOL
                          wrote on last edited by
                          #12

                          @SGaist tslib

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                          • SGaistS Offline
                            SGaistS Offline
                            SGaist
                            Lifetime Qt Champion
                            wrote on last edited by
                            #13

                            There's the invert module explained in tslib's readme.

                            Interested in AI ? www.idiap.ch
                            Please read the Qt Code of Conduct - https://forum.qt.io/topic/113070/qt-code-of-conduct

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                            • A Offline
                              A Offline
                              AMOL
                              wrote on last edited by
                              #14

                              HI @SGaist , thank you for your help I have solved the issue

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                              • SGaistS Offline
                                SGaistS Offline
                                SGaist
                                Lifetime Qt Champion
                                wrote on last edited by
                                #15

                                Good

                                Then please make the thread as solved using the "Topic Tools" button or the three doted menu beside the answer you deem correct so that other forum users may know a solution has been found.

                                Interested in AI ? www.idiap.ch
                                Please read the Qt Code of Conduct - https://forum.qt.io/topic/113070/qt-code-of-conduct

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