Ошибка setmodel is a private member of qtablewidget

static QList<QSqlRecord> selected_records( const QTableView * tv ) {
    // make sure we're really dealing with what we think we're dealing with:
    assert( static_cast<QSqlTableModel*>( tv->model() )
            == qobject_cast<QSqlTableModel*>( tv->model() );
    const QSqlTableModel * const tm = static_cast<QSqlTableModel*>( tv->model() );
    const QModelIndexList mil = tv->selectionModel()->selectedRows();
    QList<QSqlRecord> result;
    Q_FOREACH( const QModelIndex & mi, mil )
        if ( mi.isValid() )
            result.push_back( tm->record( mi.row() ) );
    return result;
}

void slotClicked( const QModelIndex & mi ) {
    // make sure we're really dealing with what we think we're dealing with:
    assert( static_cast<QSqlTableModel*>( tableView->model() )
            == qobject_cast<QSqlTableModel*>( tableView->model() );
    const QSqlRecord rec = static_cast<QSqlTableModel*>( tableView->model() )
               ->record( mi.row() );
    // use 'rec'
} 

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• Forum
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• Qt Programming
• Is an error in doc whith QTableWidget::setModel?

1. 1st January 2009, 22:38

   #1

   Is an error in doc whith QTableWidget::setModel?
   

   I wonder is the method QTableWidget::setModel reimplemented as a private? In Qt Reference Documentation it seems to be public?

   ---

2. 2nd January 2009, 06:38

   #2

   Re: Is an error in doc whith QTableWidget::setModel?
   

   wha is version of Qt? I didn’t find setModel as public in docs in 4.4.3.

   Qt Assistant — rocks!
   please, use tags [CODE] & [/CODE].

   ---

3. 2nd January 2009, 06:39

   #3

   Re: Is an error in doc whith QTableWidget::setModel?
   

   what is version of Qt? I didn’t find setModel as public in 4.4.3 docs.

   Qt Assistant — rocks!
   please, use tags [CODE] & [/CODE].

   ---

4. 2nd January 2009, 07:54

   #4

   Re: Is an error in doc whith QTableWidget::setModel?
   

   I wonder is the method QTableWidget::setModel reimplemented as a private?

   YES !
   In docs, you are seeing QAbstractItemView::setModel .

   QTableWidget manages its own internal model. If you want to use model, use it with QTableView

   ---

5. 2nd January 2009, 08:18

   #5

   Re: Is an error in doc whith QTableWidget::setModel?
   

   yup, setModel() can be used only with item view classes like QListView, QTableView, QTreeView etc. For QTableWidget, you can’t play with the model directly.

   ---

6. 3rd January 2009, 15:00

   #6

   Re: Is an error in doc whith QTableWidget::setModel?
   

   QTableWidget manages its own internal model. If you want to use model, use it with QTableView

   But it not result from docs. This method exists in list of inherited method.

   Thanks!

   ---

7. 5th January 2009, 06:41

   #7

   Re: Is an error in doc whith QTableWidget::setModel?
   

   Well, you can refer in source code for QTableWidget.
   And you are right, setModel shows in list of all methods for QTableWidget. May be its a mistake.

   ---

8. 5th January 2009, 08:51

   #8

   Re: Is an error in doc whith QTableWidget::setModel?
   

   It is a method of the base class of QTableWidget so why shouldn’t it be listed there? The documentation clearly says it’s a list of all methods including inherited ones. It’s just reimplemented as private so that you don’t have a stupid idea of calling it and segfaulting your application on the first reference to the widget.

   ---

9. 5th January 2009, 16:53

   #9

   Re: Is an error in doc whith QTableWidget::setModel?
   

   The documentation clearly says it’s a list of all methods including inherited ones.

   Yes, but documentation shows only public method, and also should show inherited public method.

   It’s just reimplemented as private so

   Where it is written?

   you don’t have a stupid idea of calling it and segfaulting your application on the first reference to the widget.

   For you knowledge, you can’t compile program where you use virtual method reimplemented as private!
   And I have a favour to ask of you Can you be more polite?

   ---

10. 5th January 2009, 20:07

    #10

    Re: Is an error in doc whith QTableWidget::setModel?
    

    Originally Posted by mikolaj
    

    Yes, but documentation shows only public method, and also should show inherited public method.

    When you access the «all method» page, all methods are shown. When you access the base documentation page, only those declared in this particular class are mentioned. SetModel() is declared in the base class and specifically hidden in the subclass. As you see no private methods are mentioned in any docs.Here:
    «If you want a table that uses your own data model you should use QTableView rather than this class.»

    For you knowledge, you can’t compile program where you use virtual method reimplemented as private!

    That’s the whole idea of it being redeclared as private. If it remained public you could have compiled it and thus wrecked the application without any possiblility of knowing why and you would have blamed Qt code for it as the debugger would clearly indicate the crash was caused by Qt code and not yours.

    And I have a favour to ask of you Can you be more polite?

    Where have I been impolite? By using the word «stupid»? I don’t think there is anything impolite there, I do stupid things as well, there is nothing wrong in making mistakes and calling ones actions such, especially if you learn from them. Please note I didn’t call you stupid, I said the method is private to stop stupid ideas of using it where it is not appropriate. You can’t imagine what people are trying to do with Qt code If your ideas felt offended by my words, I appologize to them.

    ---

11. 6th January 2009, 21:44

    #11

    Re: Is an error in doc whith QTableWidget::setModel?
    

    But I think, it would be more comfortable if the method public in parent not available in children was mentioned in docs.

    ---

12. 8th January 2009, 20:31

    #12

    Re: Is an error in doc whith QTableWidget::setModel?
    

    From QTableWidget docs, right from the beginning of the detailed description:

    The QTableWidget class provides an item-based table view

    with a default model

    .

    …

    If you want a table that uses your own data model you should use QTableView rather than this class.

    …

    J-P Nurmi

    ---

Comments

• I want to write an application that can access a table in the database. I took QSqlTableModel as model component for the table.

  The problem with the QTableView is that it seems to have no method that returns the currently selected record in the table so i took the QTableWidget class which interhits QTableView.

  But when i try to set the model to this table widget with ->setModel() i get

  the following error message:

  c:/Qt/qt/include/QtGui/../../src/gui/itemviews/qtablewidget.h:337:
  error: `virtual void QTableWidget::setModel(QAbstractItemModel*)’ is
  private.

  The message says that the method «setModel» is private. Looking into the
  documentation tells me that it is public.

  What can I do?

• I need to use QTableView because of public setModel() function, but QTableView hasnt selectedItems() function. P.S. Sorry for my English.

• As I understand, I have to use it with clicked() signal.But when i’m checking if the QList is empty I get that it’s empty.=/

• If you use QAbstractItemView::clicked(QModelIndex), the QModelIndex is passed as a signal argument. The above code is for the case that you want to see what the selected records are. In the clicked() case, you just need the two lines inside the Q_FOREACH, with mi being the QModelIndex coming from the signal.

• There is a typo above: It should say that QTableWidget has a built-in model, not QTableView.

• Careful. You don’t want selectionModel here: that’s the type used to handle selecting items in the view by, e.g. using Shift-click. The internal data model is simply the model property of a view.

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