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  4. [SOLVED] How to Restrict Unwanted Characters from String List Using QRegExp ?
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[SOLVED] How to Restrict Unwanted Characters from String List Using QRegExp ?

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  • H Offline
    H Offline
    Hostel
    wrote on 17 Feb 2013, 15:52 last edited by
    #2

    Read about QRegExpValidator which you can set to QLineEdit.

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    • M Offline
      M Offline
      Macro
      wrote on 17 Feb 2013, 16:26 last edited by
      #3

      I know abt QRegExpValidator and i know how to set it.... But for this case, i don't know how to set the validator for this.... Anyways, thanks for your suggestion...

      Thanks & Regards..

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      • H Offline
        H Offline
        Hostel
        wrote on 17 Feb 2013, 17:57 last edited by
        #4

        So you want to allow user to input in QLineEdit only values like: “AJ”, “BK”, “CL”, “DM”?

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        • M Offline
          M Offline
          Macro
          wrote on 17 Feb 2013, 18:10 last edited by
          #5

          Yes.. For the First Time the Line Edit should Accept only A, B, C & D.. it should Reject J, K, L & M and other Alphabets Like E, F, G, H, I, O, P, Q, R, S....Z

          Thanks & Regards...

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          • H Offline
            H Offline
            Hostel
            wrote on 17 Feb 2013, 18:19 last edited by
            #6

            @
            QRegExpValidator* validator = new QRegExpValidator( QRegExp( "AJ|BK|CL|DM" ) );
            lineEdit->setValidator( validator );
            @

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            • M Offline
              M Offline
              Macro
              wrote on 17 Feb 2013, 22:00 last edited by
              #7

              Thanks for your Suggestion... but this will not work in my case... The string list values may contain different set of items.. First it may contain like which i had mentioned above. the next time it may contain a different set of string items... so what should i do in that case???

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              • H Offline
                H Offline
                Hostel
                wrote on 17 Feb 2013, 22:42 last edited by
                #8

                You should read a QStringList doc ;)
                @
                QStringList sl;
                sl << "AJ" << "BK" << "CL" << "DM";

                QRegExpValidator* validator = new QRegExpValidator( QRegExp( sl.join( "|" ) ) );
                lineEdit->setValidator( validator );
                

                @

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                • S Offline
                  S Offline
                  slinavipuz
                  wrote on 17 Feb 2013, 22:45 last edited by
                  #9

                  [quote author="Rochi" date="1361138440"]Thanks for your Suggestion... but this will not work in my case... The string list values may contain different set of items.. First it may contain like which i had mentioned above. the next time it may contain a different set of string items... so what should i do in that case??? [/quote]

                  Is there any rule that will tell you how that set will change?

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                  • C Offline
                    C Offline
                    ChrisW67
                    wrote on 17 Feb 2013, 22:53 last edited by
                    #10

                    Sounds like a job for a restricted QComboBox rather than a free text editor.

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                    • M Offline
                      M Offline
                      Macro
                      wrote on 18 Feb 2013, 05:08 last edited by
                      #11

                      [quote author="slinavipuz" date="1361141106"]
                      Is there any rule that will tell you how that set will change?[/quote]

                      Yes..... I have a method called stringListType() in that if i pass any of the StringList then it will take will take the corresponding StringList items......

                      EDIT : Then i have to restrict the characters which are not in the StringList Items.......

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                      • M Offline
                        M Offline
                        Macro
                        wrote on 18 Feb 2013, 05:12 last edited by
                        #12

                        [quote author="ChrisW67" date="1361141581"]Sounds like a job for a restricted QComboBox rather than a free text editor.
                        [/quote]

                        Yup, but not completely... for a free text editior we can use a QCompleter for getting the Suggestions of the StringList Items. But in this case, i have to restrict the other characters except the characters of the StringList

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                        • M Offline
                          M Offline
                          Macro
                          wrote on 18 Feb 2013, 08:50 last edited by
                          #13

                          Whooooo..... Finally i had solved it by myself..... I had pasted the code below.....

                          @QString regExpression = "(";
                          for (int i = 0; i < getStringList()->size(); ++i)
                          {
                          regExpression.append(getStringList()->at(i) + "|");
                          }

                          QRegExp rE(regExpression);
                          q_LineEdit->setValidator(new QRegExpValidator(rE, this));@

                          Thank you all for your suggestions........

                          Thanks & Regards..

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                          • H Offline
                            H Offline
                            Hostel
                            wrote on 18 Feb 2013, 09:14 last edited by
                            #14

                            Your for loop is equal to my suggestion:
                            @
                            sl.join( "|" );
                            @

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