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. Where does role variable for setData() functions get determined? (for debugging)
Forum Updated to NodeBB v4.3 + New Features

Where does role variable for setData() functions get determined? (for debugging)

Scheduled Pinned Locked Moved Solved General and Desktop
3 Posts 2 Posters 328 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.
  • A Offline
    A Offline
    andi456
    wrote on last edited by
    #1

    Please correct me if i'm wrong. From what i've figured out so far, it seems to me that the Qt::ItemFlags returned by the flags() function determine the role for the setData() function. As a result setData() not receiving Qt::CheckStateRole indicates that something's wrong with the flags() function. Is this correct?

    If so, how could i possibly debug this.

    1 Reply Last reply
    0
    • Christian EhrlicherC Online
      Christian EhrlicherC Online
      Christian Ehrlicher
      Lifetime Qt Champion
      wrote on last edited by
      #2

      @andi456 said in Where does role variable for setData() functions get determined? (for debugging):

      result setData() not receiving Qt::CheckStateRole indicates that something's wrong with the flags() function. Is this correct?

      No. Flags don't have something to do with setData().

      When you want to have a user-checkable checkbox in your view, flags() has to return Qt::ItemIsUserCheckable and data() should return something meaningful for Qt::CheckStateRole.

      Qt Online Installer direct download: https://download.qt.io/official_releases/online_installers/
      Visit the Qt Academy at https://academy.qt.io/catalog

      A 1 Reply Last reply
      0
      • Christian EhrlicherC Christian Ehrlicher

        @andi456 said in Where does role variable for setData() functions get determined? (for debugging):

        result setData() not receiving Qt::CheckStateRole indicates that something's wrong with the flags() function. Is this correct?

        No. Flags don't have something to do with setData().

        When you want to have a user-checkable checkbox in your view, flags() has to return Qt::ItemIsUserCheckable and data() should return something meaningful for Qt::CheckStateRole.

        A Offline
        A Offline
        andi456
        wrote on last edited by
        #3

        @Christian-Ehrlicher Well, maybe I expressed myself a little bit clumsily, but it was indeed my implementation of the flags() function which caused the problem - a momentary lapse of reason, so to say. If i understand you correctly, then there's one more step involved: from flags() to data() to setData().

        1 Reply Last reply
        0

        • Login

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