Skip to content
  • Categories
  • Recent
  • Tags
  • Popular
  • Users
  • Groups
  • Search
  • Get Qt Extensions
  • Unsolved
Collapse
Brand Logo
  1. Home
  2. Qt Development
  3. General and Desktop
  4. Double not recognized
Qt 6.11 is out! See what's new in the release blog

Double not recognized

Scheduled Pinned Locked Moved Unsolved General and Desktop
3 Posts 3 Posters 1.4k Views
  • Oldest to Newest
  • Newest to Oldest
  • Most Votes
Reply
  • Reply as topic
Log in to reply
This topic has been deleted. Only users with topic management privileges can see it.
  • Roy44R Offline
    Roy44R Offline
    Roy44
    wrote on last edited by
    #1

    Hi,

    I have a strange thing:
    In my country, the decimal separator is 'a comma.

    In a line edit with a QDoubleValidator I enter 1,5
    but if i do
    bool bIsOk = false;
    double dValue = <my lineEdit>->text().toDouble(&bIsOk);

    bIsOk is still false.
    Why ? because QDoubleValidator accepts my string.

    thanks

    J.HilkJ 1 Reply Last reply
    0
    • Roy44R Roy44

      Hi,

      I have a strange thing:
      In my country, the decimal separator is 'a comma.

      In a line edit with a QDoubleValidator I enter 1,5
      but if i do
      bool bIsOk = false;
      double dValue = <my lineEdit>->text().toDouble(&bIsOk);

      bIsOk is still false.
      Why ? because QDoubleValidator accepts my string.

      thanks

      J.HilkJ Offline
      J.HilkJ Offline
      J.Hilk
      Moderators
      wrote on last edited by VRonin
      #2

      @Roy44

      hi,

      have a look at the docu QLocale::toDouble should solve your , seperator problem :)


      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
      4
      • VRoninV Offline
        VRoninV Offline
        VRonin
        wrote on last edited by
        #3

        double dValue =<my lineEdit>->locale().toDouble(<my lineEdit>->text());

        on the other hand, QLineEdit + QDoubleValidator = QDoubleSpinBox + QDoubleSpinBox::setButtonSymbols(QAbstractSpinBox::NoButtons)
        and you can use QDoubleSpinBox::value to get the value directly in decimal

        "La mort n'est rien, mais vivre vaincu et sans gloire, c'est mourir tous les jours"
        ~Napoleon Bonaparte

        On a crusade to banish setIndexWidget() from the holy land of Qt

        1 Reply Last reply
        2

        • Login

        • Login or register to search.
        • First post
          Last post
        0
        • Categories
        • Recent
        • Tags
        • Popular
        • Users
        • Groups
        • Search
        • Get Qt Extensions
        • Unsolved