myTable->horizontalHeader()->setResizeMode( 1, QHeaderView::ResizeToContents );
myTable->horizontalHeader()->setResizeMode( 2, QHeaderView::ResizeToContents );
myTable->horizontalHeader()->setResizeMode( 3, QHeaderView::Stretch );
+ myTable->horizontalHeader()->setMinimumSectionSize( 15 );
myTable->verticalHeader()->setResizeMode( QHeaderView::ResizeToContents );