QTreeWidget: widgets in header

[Jonny174]

Hi All!
How can I set some widget in QTreeWidget header? I need to place in header QLineEdit and QDoubleSpinBox. I tried this code, but this not work.

QTreeWidget *tree = new QTreeWidget( this );
tree->setColumnCount( 5 );
 
QLineEdit *edit = new QLineEdit( tree->header() );
QDoubleSpinBox *spin = new QDoubleSpinBox( tree->header() );
 
tree->header()->setIndexWidget( tree->model()->index( 0, 0 ), edit );
tree->header()->setIndexWidget( tree->model()->index( 0, 1 ), spin );

QTreeWidget *tree = new QTreeWidget( this );
tree->setColumnCount( 5 );

QLineEdit *edit = new QLineEdit( tree->header() );
QDoubleSpinBox *spin = new QDoubleSpinBox( tree->header() );

tree->header()->setIndexWidget( tree->model()->index( 0, 0 ), edit );
tree->header()->setIndexWidget( tree->model()->index( 0, 1 ), spin );

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