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Thread: Validating QLineEdit

  1. #1
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    Question Validating QLineEdit

    I'm trying to validate the input of a QLineEdit (here lineEdit_new_nickname) with a regular expression, the problem is it seem to be no validator at all, even if ->validator() returns the right QRegExpValidator. I have no idea what the problem could be. The code:

    Qt Code:
    1. IRCSettings::IRCSettings( QWidget *parent) : QWidget(parent) {
    2. setupUi(this);
    3. lastPreferredNickname = NULL;
    4. //TODO: Actually we should set the "11" part after connecting and getting RAW 005 to NICKLEN-1
    5. //QRegExp nick_regexp("[a-zA-Z][a-zA-Z0-9[]\\\\`^{}-]{0,11}");
    6. QRegExpValidator nick_validator(QRegExp("[a-zA-Z][a-zA-Z0-9[]\\\\`^{}-]{0,11}"),this);
    7. lineEdit_new_nickname->setValidator(&nick_validator);
    8. dbg() << "validator:" << lineEdit_new_nickname->validator();
    9.  
    10. dbg() << "connecting toolButton_add_nickname to listWidget_nicknames remove_nickname" <<
    11. connect(listWidget_nicknames,SIGNAL(itemDoubleClicked(QListWidgetItem*)),this,SLOT(remove_preferred_nickname(QListWidgetItem*)));
    12. dbg() << "connecting listWidget_nicknames::widgetsReordered() to this->nicknamesReordered" <<
    13. connect(listWidget_nicknames,SIGNAL(widgetsReordered(QDropEvent*)),this,SLOT(nicknamesReordered(QDropEvent*)));
    14. /**/
    15. }
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    Edit: it's not working even with the regexp ".", so the mistake is not there
    Last edited by OriginalCopy; 8th November 2007 at 16:48. Reason: little fix

  2. #2
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    Default Re: Validating QLineEdit

    The validator goes out of scope. Try:
    Qt Code:
    1. QRegExpValidator* nick_validator = new QRegExpValidator(QRegExp("[a-zA-Z][a-zA-Z0-9[]\\\\`^{}-]{0,11}"),this);
    2. lineEdit_new_nickname->setValidator(nick_validator);
    To copy to clipboard, switch view to plain text mode 
    J-P Nurmi

  3. #3
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    Default Re: Validating QLineEdit

    Thank you.

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