{
disconnect( myTable->model(), SIGNAL( dataChanged ( const QModelIndex&, const QModelIndex& ) ),
this, SLOT( onDataChanged() ) );
myTable->setRowCount( 0 );
{
disconnect( myTable->model(), SIGNAL( dataChanged ( const QModelIndex&, const QModelIndex& ) ),
this, SLOT( onDataChanged() ) );
myTable->setRowCount( 0 );