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QLineEdit Find child crashes

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

    Hi,

    Since you are using designer, all the widgets are accessible through the ui object so why do you want to use findChild ?

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    Please read the Qt Code of Conduct - https://forum.qt.io/topic/113070/qt-code-of-conduct

    U 1 Reply Last reply
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    • SGaistS SGaist

      Hi,

      Since you are using designer, all the widgets are accessible through the ui object so why do you want to use findChild ?

      U Offline
      U Offline
      Ucn_
      wrote on last edited by
      #3

      @SGaist I would like to send the names of lineEdits on button click, I have a function to process many qlineEdits and I wouldn't like to type each ui->lineEdit. My solution was to only send the name and based on the name apply something to that specific lineEdit.

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

        Send the names of linedits ? Can you give a bit more details about your goal ?

        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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        • SGaistS SGaist

          Send the names of linedits ? Can you give a bit more details about your goal ?

          U Offline
          U Offline
          Ucn_
          wrote on last edited by
          #5
          This post is deleted!
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          • SGaistS SGaist

            Send the names of linedits ? Can you give a bit more details about your goal ?

            U Offline
            U Offline
            Ucn_
            wrote on last edited by
            #6

            @SGaist for example:

            I have a function processLineEdits(QString lineEditname) and a private slot on_pushButton_3_clicked()

            void someClass::on_pushButton_3_clicked(){
            
               processLineEdits(lineEdit->objectName())
            }
            
            
            void someClass::processLineEdits(QString lineEditname){
            
            QLineEdit *buttonx =  this ->findChild<QLineEdit *>(lineEditname, Qt::FindDirectChildrenOnly);
            
            buttonx ->setText("Some Text");
            
            }
            
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            • Christian EhrlicherC Offline
              Christian EhrlicherC Offline
              Christian Ehrlicher
              Lifetime Qt Champion
              wrote on last edited by
              #7

              And why not simply pass the QLineEdit pointer here?

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              • Christian EhrlicherC Christian Ehrlicher

                And why not simply pass the QLineEdit pointer here?

                U Offline
                U Offline
                Ucn_
                wrote on last edited by
                #8

                @Christian-Ehrlicher I have many lineEdits and many slots each slot sends one lineEdit name to the processLineEdits(). This function receives any lineEdit name checks the echoMode if is normal then sets to password and if is password then it sets to normal. It shows and hides text. With something like this I don't need to do it one lineEdit by one, I want the function to handle for all qLineEdit by name.

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                • Christian EhrlicherC Offline
                  Christian EhrlicherC Offline
                  Christian Ehrlicher
                  Lifetime Qt Champion
                  wrote on last edited by
                  #9

                  The put all your QLineEdit pointer into a QVector and iterate over them.

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                  • SGaistS Offline
                    SGaistS Offline
                    SGaist
                    Lifetime Qt Champion
                    wrote on last edited by
                    #10

                    Wouldn't it better to create a custom widget containing your lined edits and buttons and give it a proper interface to do what you want to do ?

                    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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                    • Christian EhrlicherC Christian Ehrlicher

                      The put all your QLineEdit pointer into a QVector and iterate over them.

                      U Offline
                      U Offline
                      Ucn_
                      wrote on last edited by
                      #11

                      @Christian-Ehrlicher Thanks, it worked.

                      1 Reply Last reply
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