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. Model item cleanup?
QtWS25 Last Chance

Model item cleanup?

Scheduled Pinned Locked Moved General and Desktop
6 Posts 3 Posters 2.6k 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.
  • J Offline
    J Offline
    jsshapiro
    wrote on last edited by
    #1

    When a model item is added to a model, does the model "own" the item for deletion purposes?

    1 Reply Last reply
    0
    • D Offline
      D Offline
      dangelog
      wrote on last edited by
      #2

      Which model items are you talking about?

      Software Engineer
      KDAB (UK) Ltd., a KDAB Group company

      1 Reply Last reply
      0
      • J Offline
        J Offline
        jsshapiro
        wrote on last edited by
        #3

        For example, when I add a StandardModelItem to a StandardModel. Who is later responsible for deleting the StandardModelItem?

        1 Reply Last reply
        0
        • D Offline
          D Offline
          dangelog
          wrote on last edited by
          #4

          The model you added it into.
          [quote]
          QStandardItemModel::~QStandardItemModel ()

          Destructs the model. The model destroys all its items.
          [/quote]

          Software Engineer
          KDAB (UK) Ltd., a KDAB Group company

          1 Reply Last reply
          0
          • J Offline
            J Offline
            jsshapiro
            wrote on last edited by
            #5

            Thanks. Sorry - I should have read more carefully.

            1 Reply Last reply
            0
            • G Offline
              G Offline
              goetz
              wrote on last edited by
              #6

              Caution! The model does not always delete the items!

              If you use one of the takeXX methods, like "QStandardItemModel::takeItem() ":http://doc.qt.nokia.com/4.7/qstandarditemmodel.html#takeItem, the item is removed from the model, but it is not deleted! You get back a pointer (or a list of pointers) to the item(s) and you can reinsert the item in the same or another model or you must delete it manually to avoid a memory leak.

              http://www.catb.org/~esr/faqs/smart-questions.html

              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