CODEWITHSUNDEEP
qtqt4qstandarditemmodel
mosg
mosg

Reputation: 12381

HowTo appendRow to QStandardItemModel after setModel() method?

Stupid question, but I can't find the way out of this crap about an hour. I have a QTableView widget, trying to add rows with QStandardItemModel. In ctor, before

tableView->setModel( MyStandardItemModel );

I run this function:

void MyDialog::addItem( const SomeSection& section )
{
     SignalBlocker< QStandardItemModel > blocker( model_ );

     QStandardItem* visibilityItem = new QStandardItem;
     visibilityItem->setCheckable( true );
     visibilityItem->setCheckState( !section.hidden ? Qt::Checked : Qt::Unchecked );
     visibilityItem->setData( QVariant::fromValue( section ), Qt::UserRole + 1 );

     QStandardItem* descriptionItem = new QStandardItem( section.name );

     QStandardItem* signatureItem = new QStandardItem;
     if( section.sign )
     {
          signatureItem->setToolTip( tr( "Требует подписи" ) );
          signatureItem->setIcon( QIcon( ":/signatures/images/signatures/check-sgn.png" ) );
     }

     model_->appendRow( StandardItemList() << visibilityItem << descriptionItem << signatureItem );
}

PS: StandardItemList is just a typedef QList< QStandardItem* > StandardItemList;

So first of all I made some addItem()'s and then setModel() and all rows are visible in a table. BUT when I'm trying to append another row later (at this time from the button clicked), with

addItem( MyNewSection );

I don't see the changes in QTableView widget (no new row and no new MyNewSection data in it)! I think that I have to "update" model content somehow, but I can't find correct methods from model documentation...

Any help?

Thanks!

Upvotes: 0

Views: 5300

Answers (1)

Frank Osterfeld
Frank Osterfeld

Reputation: 25155

The code creating and adding the items to the model looks correct.

If SignalBlocker does what I suspect it to do, I suppose that it causes your troubles. When you're adding items, the model emits signals that the view connects to, updating as you add the item. If you call blockSignals(true) on the model, you prevent any signals from being emitted, and the view isn't notified of the changes.

Upvotes: 2

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