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Using QInputDialog with custom QValidator

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  • I Offline
    I Offline
    icedecker
    wrote on last edited by
    #1

    Hi,

    I'm trying to use QInputDialog with Validator. The custom Validator I'm using is from "here":http://www.qtforum.org/article/17075/qlineedit-enable-only-number.html?s=2fa8a4c736074599317c1a85d8971710c4a1c479#post67682 . In the docs I saw that one of the arguments of the function QInputDialog::getText can be QLineEdit::setValidator. The problem is how to get the pointer to the lineEdit to pass to the QValidator? The code below is not working:

    @QString text = QInputDialog::getText(NULL, tr("Define price"), tr("Price:"), QLineEdit::setValidator(new MyDoubleValidator( 0, 10, 2, text)), defaultPrice, &ok);@

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

      Hi,

      You can't set any validator when using getText, it's a static function.

      Calling setValidator like that won't compile. You are trying to call a non static function like it was one.

      The simple way is to implement your own dialog to do what you want to achieve

      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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      • I Offline
        I Offline
        icedecker
        wrote on last edited by
        #3

        So I need to make a class from QDialog or from QInputDialog?

        Thanks for the reply!

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

          Go from QDialog, it will be simpler, you just need a QLineEdit and QDialogButtonBox (plus the necessary eye candy like a label etc..)

          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
            andre
            wrote on last edited by
            #5

            Or, you simply use QInputDialog itself, but use the normal, non static API for it. It's not that hard to get a reference to the line edit. findChild<QLineEdit*>() on it should do it.

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

              To add to the suggestion of Andre, you must first call setInputMode, otherwise you won't have the line edit available

              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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