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  4. How to pass String Value in decimal to QlineEdit?

How to pass String Value in decimal to QlineEdit?

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  • WaseeW Offline
    WaseeW Offline
    Wasee
    wrote on last edited by
    #18

    @jsulm Hi;
    Its giving me Values continuous but I need to print these values after 0x in integer form in line-edit.
    (0xb6f44000):0x11EACAC
    (0xb6efe00):0x11EACAC
    (0xb6fd4000):0x11EACAC
    (0xb6fde000):0x11EACAC

    jsulmJ 1 Reply Last reply
    0
    • WaseeW Wasee

      @jsulm Hi;
      Its giving me Values continuous but I need to print these values after 0x in integer form in line-edit.
      (0xb6f44000):0x11EACAC
      (0xb6efe00):0x11EACAC
      (0xb6fd4000):0x11EACAC
      (0xb6fde000):0x11EACAC

      jsulmJ Online
      jsulmJ Online
      jsulm
      Lifetime Qt Champion
      wrote on last edited by
      #19

      @Wasee What's wrong with https://doc.qt.io/qt-5/qstring.html#number-1?

      d = Qstring(list).toInt(&ok, 16); // Since you handle hex numbers you need to tell toInt that it is a hex number - so pass 16 as base
      ui->lineedit->setText(QString::number(d));
      

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

      1 Reply Last reply
      1
      • 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 Online
          jsulmJ Online
          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

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          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.

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            • 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 Online
                        jsulmJ Online
                        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

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                        • 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 Online
                              jsulmJ Online
                              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 Online
                                  jsulmJ Online
                                  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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