add child a QTreeWidget

[mattia]

Hello, i have to add a node in QTreeWidget.
My QTreeWidget before this operation is:
voice1
voice2
|__subvoice1

i want to add a child to subvoice1:
voice1
voice2
|__subvoice1
|__ subsubvoice1

this's the code:

// disconnect signal
	ui.twmConfigtreeWidget->blockSignals ( true );	
 
	QList<QTreeWidgetItem *> connectionItemsList;
	QString nodeNameString;
 
	nodeNameString = "voice2";
	connectionItemsList = ui.twmConfigtreeWidget->findItems( nodeNameString , Qt::MatchContains , 0 );
 
	for ( int i = 0; i < connectionItemsList.size(); i++ )
	{
		QList<QTreeWidgetItem *> connectionsChildren = connectionItemsList.at( i )->takeChildren();
 
		for ( int k = 0; k < connectionsChildren.size(); k++ )
		{
 
			if ( connectionsChildren.at( i )->text( 0 ) == "subvoice1" )
			{
				QTreeWidgetItem * twmQTreeWidgetRDPNewConnection = new QTreeWidgetItem ();
				twmQTreeWidgetRDPNewConnection->setText( 0 , "subsubvoice1" );
				connectionsChildren.at( i )->insertChild( 0 , twmQTreeWidgetRDPNewConnection );
 
			}
		}
	}
 
	// connect signal
	ui.twmConfigtreeWidget->blockSignals ( false );

// disconnect signal
	ui.twmConfigtreeWidget->blockSignals ( true );	
	
	QList<QTreeWidgetItem *> connectionItemsList;
	QString nodeNameString;

	nodeNameString = "voice2";
	connectionItemsList = ui.twmConfigtreeWidget->findItems( nodeNameString , Qt::MatchContains , 0 );
	
	for ( int i = 0; i < connectionItemsList.size(); i++ )
	{
		QList<QTreeWidgetItem *> connectionsChildren = connectionItemsList.at( i )->takeChildren();
		
		for ( int k = 0; k < connectionsChildren.size(); k++ )
		{
			
			if ( connectionsChildren.at( i )->text( 0 ) == "subvoice1" )
			{
				QTreeWidgetItem * twmQTreeWidgetRDPNewConnection = new QTreeWidgetItem ();
				twmQTreeWidgetRDPNewConnection->setText( 0 , "subsubvoice1" );
				connectionsChildren.at( i )->insertChild( 0 , twmQTreeWidgetRDPNewConnection );
			
			}
		}
	}
	
	// connect signal
	ui.twmConfigtreeWidget->blockSignals ( false );

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but it does not work...my tree is always the same...any hint?

[jpn]

Notice what QTreeWidgetItem::takeChildren() docs say. It will remove children from the tree. And later you attempt to add more children to items which were just removed...