Вопрос снят. Можно отстатусбарить кутабле посредство общего родительского виджета!
добавлено спустя 47 минут: QVBoxLayout * mainFormLayout;
// QSplitter * splitter;
QWidget * canvLayoutWidget1, * canvLayoutWidget2;
QVBoxLayout * layout1, * layout2;
QTable * tbl1, * tbl2;
QStatusBar * bar1, * bar2;
QButton *btn;
mainFormLayout = new QVBoxLayout( this, 0, 0, "mainFormLayout");
splitter = new QSplitter( this, "splitter" );
splitter->setOrientation( QSplitter::Vertical );
canvLayoutWidget1 = new QWidget( splitter, "layout1widg" );
canvLayoutWidget2 = new QWidget( splitter, "layout2widg" );
layout1 = new QVBoxLayout( canvLayoutWidget1, 0, 0, "layout1");
layout2 = new QVBoxLayout( canvLayoutWidget2, 0, 0, "layout2");
tbl1 = new QTable( canvLayoutWidget1, "tbl1" );
tbl2 = new QTable( canvLayoutWidget2, "tbl2" );
bar1 = new QStatusBar (canvLayoutWidget1);
bar2 = new QStatusBar (canvLayoutWidget2);
btn = new QPushButton (this);
layout1->addWidget( tbl1 );
layout2->addWidget( tbl2 );
layout1->addWidget (bar1);
layout2->addWidget (bar2);
mainFormLayout->addWidget( splitter );
mainFormLayout->addWidget (btn);
languageChange();
resize( QSize(563, 455).expandedTo(minimumSizeHint()) );
clearWState( WState_Polished );
//ТЕСТОВОЕ
tbl1->setNumRows( 3 );
tbl1->setNumCols( 3 );
tbl2->setNumRows( 3 );
tbl2->setNumCols( 3 );
connect (btn, SIGNAL(clicked()), this, SLOT(myClick()));