myTable->horizontalHeader()->setResizeMode( 1, QHeaderView::ResizeToContents );
myTable->horizontalHeader()->setResizeMode( 2, QHeaderView::ResizeToContents );
myTable->horizontalHeader()->setResizeMode( 3, QHeaderView::Stretch );
myTable->horizontalHeader()->setResizeMode( 1, QHeaderView::ResizeToContents );
myTable->horizontalHeader()->setResizeMode( 2, QHeaderView::ResizeToContents );
myTable->horizontalHeader()->setResizeMode( 3, QHeaderView::Stretch );