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ignore shift to move between edit text

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  • JonBJ JonB

    @rest
    At some level I think you're telling us that your bar code scanner generates key events for the characters it meets?...

    I guess SHIFT itself raises a CWidget::keyPressEvent? So (given what you're doing), you better make your keyPressEvent code look to see if its the SHIFT key and not do the focus swap in that case. Your focus swap code is what is causing it to act like TAB.

    I suspect apart from that that your approach is wrong, but the above is to answer your question as to why it behaves as it does..

    R Offline
    R Offline
    rest
    wrote on last edited by
    #7

    @JonB so how you think i should approach this? i still think i need the keypressevent .. i don't have so much experience with working with qt and events

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    • mrjjM Offline
      mrjjM Offline
      mrjj
      Lifetime Qt Champion
      wrote on last edited by
      #8

      Hi
      Did you use debugger and check what key combination that makes it
      "tab" to next edit ?
      I wondering if the jump happens when u pass the key to
      ui->leInformation->KeyPressEvent(event);
      (then we can maybe do different, like remove shift)

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      • mrjjM mrjj

        Hi
        Did you use debugger and check what key combination that makes it
        "tab" to next edit ?
        I wondering if the jump happens when u pass the key to
        ui->leInformation->KeyPressEvent(event);
        (then we can maybe do different, like remove shift)

        R Offline
        R Offline
        rest
        wrote on last edited by
        #9

        @mrjj i will make some debugging now, but is not about that cause i commented ui->leInformation->KeyPressEvent(event); and is the same

        mrjjM 1 Reply Last reply
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        • R rest

          @mrjj i will make some debugging now, but is not about that cause i commented ui->leInformation->KeyPressEvent(event); and is the same

          mrjjM Offline
          mrjjM Offline
          mrjj
          Lifetime Qt Champion
          wrote on last edited by
          #10

          @rest
          if you dont forward the keys at all , it still jumps ?
          Ok, it sounds like the input trigger key navigation.

          I assume you are using an USB scanner in hid keyboard mode.

          You might want to install event filter on Application to find out what is going on.
          http://doc.qt.io/qt-5/qobject.html#installEventFilter

          https://stackoverflow.com/questions/26368659/qwidget-how-to-receive-keypressevent-inside-child-widgets

          Its hard to suggest what to do when we dont really know why input makes it focus next control.

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          • R Offline
            R Offline
            rest
            wrote on last edited by
            #11

            so i made some debugging and when shift is pressed he gets inside my if and changes focus
            alt text
            0_1523557300643_dsdsdsdsds.PNG

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            • R Offline
              R Offline
              rest
              wrote on last edited by
              #12

              but witch one of the variables gets me the key pressed? i tried something like this !event->key() == Qt::ShiftModifier and doesnt work, there is another way to check?

              mrjjM 1 Reply Last reply
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              • R rest

                but witch one of the variables gets me the key pressed? i tried something like this !event->key() == Qt::ShiftModifier and doesnt work, there is another way to check?

                mrjjM Offline
                mrjjM Offline
                mrjj
                Lifetime Qt Champion
                wrote on last edited by
                #13

                @rest said in ignore shift to move between edit text:

                Qt::ShiftModifier

                if(event->modifiers() & Qt::ShiftModifier){...}

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                • R Offline
                  R Offline
                  rest
                  wrote on last edited by
                  #14

                  @mrjj thank you so much, i will try everything and see what works

                  JonBJ 1 Reply Last reply
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                  • R rest

                    @mrjj thank you so much, i will try everything and see what works

                    JonBJ Online
                    JonBJ Online
                    JonB
                    wrote on last edited by
                    #15

                    @rest
                    Be careful: I'm thinking you will get one event for just the SHIFT press, and then Qt::ShiftModifier will also still be true for the event which arrives for the B.

                    I don't get the whole intention of what you're trying to achieve with your code. You decide where input is to go based on:

                    if(focusWidget() == ui->lePath && !ui->lePath->text().isEmpty())
                    

                    Why? What's the logic here? What's the idea of switching focus here?

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                    • JonBJ JonB

                      @rest
                      Be careful: I'm thinking you will get one event for just the SHIFT press, and then Qt::ShiftModifier will also still be true for the event which arrives for the B.

                      I don't get the whole intention of what you're trying to achieve with your code. You decide where input is to go based on:

                      if(focusWidget() == ui->lePath && !ui->lePath->text().isEmpty())
                      

                      Why? What's the logic here? What's the idea of switching focus here?

                      R Offline
                      R Offline
                      rest
                      wrote on last edited by
                      #16

                      @JonB if i scanned a barcode means that focus is on first edit and he is not empty means i should change focus on second edit for scanning there, this is what i thought i don t have so much experience on this i don t really know how i can make this work

                      mrjjM JonBJ 2 Replies Last reply
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                      • R rest

                        @JonB if i scanned a barcode means that focus is on first edit and he is not empty means i should change focus on second edit for scanning there, this is what i thought i don t have so much experience on this i don t really know how i can make this work

                        mrjjM Offline
                        mrjjM Offline
                        mrjj
                        Lifetime Qt Champion
                        wrote on last edited by
                        #17

                        @rest
                        How do you know first barcode data is 100% received ?
                        Since it comes key pr key. Is there an end of input char ?

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                        • R rest

                          @JonB if i scanned a barcode means that focus is on first edit and he is not empty means i should change focus on second edit for scanning there, this is what i thought i don t have so much experience on this i don t really know how i can make this work

                          JonBJ Online
                          JonBJ Online
                          JonB
                          wrote on last edited by
                          #18

                          @rest
                          But aren't you saying the "key presses for the barcode" are for each letter? When the second key arrives in lePath (it has the focus, and it's no longer empty), won't your code send it to leInformation?

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                          • R Offline
                            R Offline
                            rest
                            wrote on last edited by
                            #19

                            No, i dont have something like that .. i don t know how to check this.. gets so difficult. first i had just one edit text and everything worked fine..

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                            • JonBJ JonB

                              @rest
                              But aren't you saying the "key presses for the barcode" are for each letter? When the second key arrives in lePath (it has the focus, and it's no longer empty), won't your code send it to leInformation?

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                              rest
                              wrote on last edited by
                              #20

                              @JonB what you mean with second key? everything is well until the uppercase gets in, if i scan only digits everything is fine for both edits

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                              • mrjjM Offline
                                mrjjM Offline
                                mrjj
                                Lifetime Qt Champion
                                wrote on last edited by
                                #21

                                You can try to use only click focus and not strong focus.

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                                • R Offline
                                  R Offline
                                  rest
                                  wrote on last edited by
                                  #22

                                  I realised i was doing something not necessary and my key event exactly checking that shift so i put my setfocus for first edit text in constructor and verified in key pressed event if event->text is empty to ignore it.

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