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How to pass String Value in decimal to QlineEdit?

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  • WaseeW Offline
    WaseeW Offline
    Wasee
    wrote on last edited by
    #20

    @jsulm Hi;
    Its giving me value 0 in my lineedit.

    jsulmJ 1 Reply Last reply
    0
    • WaseeW Wasee

      @jsulm Hi;
      Its giving me value 0 in my lineedit.

      jsulmJ Offline
      jsulmJ Offline
      jsulm
      Lifetime Qt Champion
      wrote on last edited by
      #21

      @Wasee That means that the conversion from string to int failed. I'm now out of this thread. Debug your code to see what happens and fix the issues...

      https://forum.qt.io/topic/113070/qt-code-of-conduct

      1 Reply Last reply
      0
      • J.HilkJ Offline
        J.HilkJ Offline
        J.Hilk
        Moderators
        wrote on last edited by
        #22
        Temp_reading.start("sudo devmem2 0x80000000");
        Temp_reading.waitForFinished();
        QString output(Temp_reading.readAllStandardOutput());
        output = output.replace("(", "").replace(")", "").replace(":", "");
        auto split = output.split("0x");
        QString str("%1:%2");
        str= str.arg(split.at(1).toLongLong(nullptr, 16)).arg(split.at(2).toLongLong(nullptr, 16));
        ui->lineedit->setText(str);
        

        alt text


        Be aware of the Qt Code of Conduct, when posting : https://forum.qt.io/topic/113070/qt-code-of-conduct


        Q: What's that?
        A: It's blue light.
        Q: What does it do?
        A: It turns blue.

        1 Reply Last reply
        2
        • WaseeW Offline
          WaseeW Offline
          Wasee
          wrote on last edited by
          #23

          @J-Hilk Hi;
          I am still getting error "split does not name a type" and "split is not declare in this scope" and "nullptr was not declared in this scope"
          thanks

          J.HilkJ 1 Reply Last reply
          0
          • WaseeW Wasee

            @J-Hilk Hi;
            I am still getting error "split does not name a type" and "split is not declare in this scope" and "nullptr was not declared in this scope"
            thanks

            J.HilkJ Offline
            J.HilkJ Offline
            J.Hilk
            Moderators
            wrote on last edited by
            #24

            @Wasee said in How to pass String Value in decimal to QlineEdit?:

            "nullptr was not declared in this scope"

            impossible if you're using c++11 or later !

            split does not name a type

            either you forgot auto or you're really not using c++11. Split it is of type QStringList


            Be aware of the Qt Code of Conduct, when posting : https://forum.qt.io/topic/113070/qt-code-of-conduct


            Q: What's that?
            A: It's blue light.
            Q: What does it do?
            A: It turns blue.

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            • WaseeW Offline
              WaseeW Offline
              Wasee
              wrote on last edited by
              #25

              @J-Hilk Hi;
              how I can solve this issue?

              J.HilkJ 1 Reply Last reply
              0
              • WaseeW Wasee

                @J-Hilk Hi;
                how I can solve this issue?

                J.HilkJ Offline
                J.HilkJ Offline
                J.Hilk
                Moderators
                wrote on last edited by
                #26

                @Wasee add c++11 to your compiler call


                Be aware of the Qt Code of Conduct, when posting : https://forum.qt.io/topic/113070/qt-code-of-conduct


                Q: What's that?
                A: It's blue light.
                Q: What does it do?
                A: It turns blue.

                1 Reply Last reply
                0
                • WaseeW Offline
                  WaseeW Offline
                  Wasee
                  wrote on last edited by
                  #27

                  @J-Hilk Hi;
                  Problem solved but I need little bit change its giving me value 0:108280000, I didn't need 0: in this value how I can remove it.

                  jsulmJ J.HilkJ 2 Replies Last reply
                  0
                  • WaseeW Wasee

                    @J-Hilk Hi;
                    Problem solved but I need little bit change its giving me value 0:108280000, I didn't need 0: in this value how I can remove it.

                    jsulmJ Offline
                    jsulmJ Offline
                    jsulm
                    Lifetime Qt Champion
                    wrote on last edited by
                    #28

                    @Wasee said in How to pass String Value in decimal to QlineEdit?:

                    how I can remove it

                    How about doing what you already did in this thread: use split() method and ':' as split character.

                    https://forum.qt.io/topic/113070/qt-code-of-conduct

                    1 Reply Last reply
                    0
                    • WaseeW Wasee

                      @J-Hilk Hi;
                      Problem solved but I need little bit change its giving me value 0:108280000, I didn't need 0: in this value how I can remove it.

                      J.HilkJ Offline
                      J.HilkJ Offline
                      J.Hilk
                      Moderators
                      wrote on last edited by J.Hilk
                      #29

                      @Wasee
                      the magic happens here

                      QString str("%1:%2");
                      str= str.arg(split.at(1).toLongLong(nullptr, 16)).arg(split.at(2).toLongLong(nullptr, 16));
                      

                      do you see, what is happening?

                      assuming your result from the external process is of the format
                      (0xb6f44000):0x11EACAC

                      like you wrote earlier.
                      than splitwill contain

                      output = output.replace("(", "").replace(")", "").replace(":", "");
                      auto split = output.split("0x");
                      // index 0 = ""
                      //index 1 = "b6f44000"
                      //index 2 = "11EACAC"
                      

                      so depending on what value you want, you want index 1 or 2 therefore

                      ui->lineedit->setText(QString::number(split.at(index1or2),16);
                      

                      Be aware of the Qt Code of Conduct, when posting : https://forum.qt.io/topic/113070/qt-code-of-conduct


                      Q: What's that?
                      A: It's blue light.
                      Q: What does it do?
                      A: It turns blue.

                      1 Reply Last reply
                      2
                      • WaseeW Offline
                        WaseeW Offline
                        Wasee
                        wrote on last edited by
                        #30

                        @J-Hilk Hi;
                        Its giving me index1or2 declaration error here.
                        thanks

                        jsulmJ 1 Reply Last reply
                        0
                        • WaseeW Wasee

                          @J-Hilk Hi;
                          Its giving me index1or2 declaration error here.
                          thanks

                          jsulmJ Offline
                          jsulmJ Offline
                          jsulm
                          Lifetime Qt Champion
                          wrote on last edited by
                          #31

                          @Wasee said in How to pass String Value in decimal to QlineEdit?:

                          index1or2

                          Come on - this is just a placeholder. You need to replace it with either index1 or index2...

                          https://forum.qt.io/topic/113070/qt-code-of-conduct

                          1 Reply Last reply
                          2
                          • WaseeW Offline
                            WaseeW Offline
                            Wasee
                            wrote on last edited by
                            #32

                            @jsulm Hi;
                            When I placed this code:
                            /@
                            ui->lineedit->setText(QString::number(split.at(index1or2),16);
                            @/

                            Its giving me error again of invalid conversion.
                            Simply tell me how I can convert it into integer of following external value.
                            /@jsulm
                            Temp_reading.start("sudo devmem2 0x80000000");
                            Temp_reading.waitForFinished();
                            QString output(Temp_reading.readAllStandardOutput());
                            output = output.replace("(", "").replace(")", "").replace(":", "");
                            auto split = output.split("0x");
                            QString str("%1:%2");
                            str= str.arg(split.at(1).toLongLong(nullptr, 16)).arg(split.at(2).toLongLong(nullptr, 16));

                            @/
                            just convert it into integer value.

                            jsulmJ 1 Reply Last reply
                            0
                            • WaseeW Wasee

                              @jsulm Hi;
                              When I placed this code:
                              /@
                              ui->lineedit->setText(QString::number(split.at(index1or2),16);
                              @/

                              Its giving me error again of invalid conversion.
                              Simply tell me how I can convert it into integer of following external value.
                              /@jsulm
                              Temp_reading.start("sudo devmem2 0x80000000");
                              Temp_reading.waitForFinished();
                              QString output(Temp_reading.readAllStandardOutput());
                              output = output.replace("(", "").replace(")", "").replace(":", "");
                              auto split = output.split("0x");
                              QString str("%1:%2");
                              str= str.arg(split.at(1).toLongLong(nullptr, 16)).arg(split.at(2).toLongLong(nullptr, 16));

                              @/
                              just convert it into integer value.

                              jsulmJ Offline
                              jsulmJ Offline
                              jsulm
                              Lifetime Qt Champion
                              wrote on last edited by
                              #33

                              @Wasee said in How to pass String Value in decimal to QlineEdit?:

                              Simply tell me how I can convert it into integer of following external value

                              You already was told how and @J-Hilk even gave you code.
                              If it does not work then please be so kind and analyse what happens. This is what a developer should do in such a situation.
                              What does split.at(index1) or split.at(index2) return? Does it return a string containing a valid hex number?

                              https://forum.qt.io/topic/113070/qt-code-of-conduct

                              1 Reply Last reply
                              2

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