Replace deprecated QWheelEvent.delta by angleDelta

sdrgui/gui/graphicsviewzoom.cpp

@@ -70,7 +70,7 @@ bool GraphicsViewZoom::eventFilter(QObject *object, QEvent *event)
         QWheelEvent* wheelEvent = static_cast<QWheelEvent*>(event);
         if (QApplication::keyboardModifiers() == m_modifiers)
         {
-            if (wheelEvent->orientation() == Qt::Vertical)
+            if (wheelEvent->angleDelta().y() != 0)
             {
                 double angle = wheelEvent->angleDelta().y();
                 double factor = qPow(m_zoomFactorBase, angle);

sdrgui/gui/valuedial.cpp

@@ -386,7 +386,7 @@ void ValueDial::wheelEvent(QWheelEvent *event)
 
     if (m_animationState == 0)
     {
-        if (event->delta() < 0)
+        if (event->angleDelta().y() < 0)
         {
             if (event->modifiers() & Qt::ShiftModifier) {
                 e *= 5;

sdrgui/gui/valuedialz.cpp

@@ -439,7 +439,7 @@ void ValueDialZ::wheelEvent(QWheelEvent* event)
         {
             qint64 e = findExponent(m_hightlightedDigit);
 
-            if(event->delta() < 0)
+            if(event->angleDelta().y() < 0)
             {
                 if (event->modifiers() & Qt::ShiftModifier) {
                     e *= 5;