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



  • Hi...

    I am having a QLineEdit and a QStringList. My String List contains "AJ", "BK", "CL", "DM" strings in it. Now, i need to check for the first character of the String List items, if it Accepts then Allow it to enter in the QLineEdit else it should be Restricted, same way i need to check for the second character if it accepts then Allow it, else Restrict. Using QRegExp how can i make this?? I tried to include my StringList in my QRegExp. But no use... :(

    Thanks & Regards..



  • Read about QRegExpValidator which you can set to QLineEdit.



  • 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..



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



  • 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...



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



  • 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???



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

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

    @



  • [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?



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



  • [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.......



  • [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



  • 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..



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


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