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Thread: crash on QTreeWidgetItem::data

  1. #1
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    Default crash on QTreeWidgetItem::data

    TreewidgetForCheckbox::TreewidgetForCheckbox(QWidg et *parent) :
    QTreeWidget(parent)
    {
    self_ = false;

    connect(this,SIGNAL(itemChanged(QTreeWidgetItem*,i nt)),
    this,SLOT(OnItemChanged(QTreeWidgetItem*,int)));

    }

    void TreewidgetForCheckbox::OnItemChanged(QTreeWidgetIt em *Aitem, int )
    {

    if(self_ == true)
    return;
    QTreeWidgetItem *parentItem = Aitem->parent();
    int itemstat = Aitem->data(0,Qt::CheckStateRole).toInt();
    if(itemstat ==Qt::PartiallyChecked)
    {}
    }

    why it crash int itemstat = Aitem->data(0,Qt::CheckStateRole).toInt() ???
    }

  2. #2
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    Default Re: crash on QTreeWidgetItem::data

    Are you sure?
    When you know how to do it then you may do it wrong.
    When you don't know how to do it then it is not that you may do it wrong but you may not do it right.

  3. #3
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    Default Re: crash on QTreeWidgetItem::data

    AItem is null or invalid and it is possibly crashing on the line before.
    The item has no column 0, i.e. it was constructed with an empty QStringList.

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