QTreeWidget crash (improver use?)

[csernai.csaba]

First of all, the code you posted is very weird.
Why do you code the implementation in the header? Are you coming from a C# world?

Nope. It's easier to post here. The source and the header is separated in my solution.
And it is a samle code.

I copied your code and tried it for myself. It doesn't crash for me.
Post the error you get please.

I don't know if it matters, i compile it with VS 2008 x64 and run it on a Windows 7 x64 system.

Unhandled exception at 0x65948c50 (QtGuid4.dll) in trash2.exe: 0xC0000005: Access violation reading location 0xffffffffffffffff.

Unhandled exception at 0x65948c50 (QtGuid4.dll) in trash2.exe: 0xC0000005: Access violation reading location 0xffffffffffffffff.

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It's crashes in this part ( should i post the Call Stack? ):

QVariant QTreeModel::data(const QModelIndex &index, int role) const
{
    if (!index.isValid())
        return QVariant();
    QTreeWidgetItem *itm = item(index);
    if (itm)
        return itm->data(index.column(), role);
    return QVariant();
}

QVariant QTreeModel::data(const QModelIndex &index, int role) const
{
    if (!index.isValid())
        return QVariant();
    QTreeWidgetItem *itm = item(index);
    if (itm)
        return itm->data(index.column(), role);
    return QVariant();
}

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The use of ui is a little bit strange to me.
And you should include QTreeWidgetItem

Iit was generated using the default Qt Application project settings in VS2008.
I think the QTreeWidget.h includes QTreeWidgetItem and QTreeWidget is included in the ui's header.