Since Qt 5.14 this signal is named textHighlighted.
spacingCO->addItem(qt_("Visible Space"), "visible");
spacingCO->addItem(qt_("Custom"), "custom");
spacingCO->addItem(qt_("Visible Space"), "visible");
spacingCO->addItem(qt_("Custom"), "custom");
+#if QT_VERSION < 0x050e00
connect(spacingCO, SIGNAL(highlighted(QString)),
this, SLOT(changedSlot()));
connect(spacingCO, SIGNAL(highlighted(QString)),
this, SLOT(changedSlot()));
+#else
+ connect(spacingCO, SIGNAL(textHighlighted(QString)),
+ this, SLOT(changedSlot()));
+#endif
connect(valueLE, SIGNAL(textChanged(QString)),
this, SLOT(changedSlot()));
connect(spacingCO, SIGNAL(activated(int)),
connect(valueLE, SIGNAL(textChanged(QString)),
this, SLOT(changedSlot()));
connect(spacingCO, SIGNAL(activated(int)),