QPushButton *const stack_button =
new QPushButton(tr("Stack Decoder"), parent);
stack_button->setMenu(decoder_menu);
+ stack_button->setToolTip(tr("Stack a higher-level decoder on top of this one"));
QHBoxLayout *stack_button_box = new QHBoxLayout;
stack_button_box->addWidget(stack_button, 0, Qt::AlignRight);