What I use is,

Qt Code:
  1. QAction *enDusukAlis = new QAction(QString::fromUtf8("En DüşÃ¼k Alış Fiyatı"), w->toolButton());
  2. connect(enDusukAlis, SIGNAL(activated()), this, SLOT(slotenDusukAlis()));
  3. w->toolButton()->addAction(enDusukAlis);
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But the signal doesnt work