Fix compat with Qt <5.14

Author: timschneeb

src/subprojects/GraphicEQWidget/widgets/FrequencyPlotHRuler.cpp

@@ -128,7 +128,11 @@ void FrequencyPlotHRuler::paintEvent(QPaintEvent*)
 void FrequencyPlotHRuler::wheelEvent(QWheelEvent* event)
 {
 	FrequencyPlotView* view = qobject_cast<FrequencyPlotView*>(parentWidget());
+#if QT_VERSION < QT_VERSION_CHECK(5, 14, 0)
+    view->zoom(event->angleDelta().y(), 0, event->x() - view->viewportMargins().left(), 0);
+#else
     view->zoom(event->angleDelta().y(), 0, event->position().x() - view->viewportMargins().left(), 0);
+#endif
 }
 
 void FrequencyPlotHRuler::mouseMoveEvent(QMouseEvent* event)

src/subprojects/GraphicEQWidget/widgets/FrequencyPlotVRuler.cpp

@@ -100,6 +100,11 @@ void FrequencyPlotVRuler::wheelEvent(QWheelEvent* event)
 {
 	FrequencyPlotView* view = qobject_cast<FrequencyPlotView*>(parentWidget());
     view->zoom(0, event->angleDelta().y(), 0, event->position().y());
+#if QT_VERSION < QT_VERSION_CHECK(5, 14, 0)
+    view->zoom(0, event->angleDelta().y(), 0, event->y());
+#else
+    view->zoom(0, event->angleDelta().y(), 0, event->position().y());
+#endif
 }
 
 void FrequencyPlotVRuler::mouseMoveEvent(QMouseEvent* event)

src/subprojects/GraphicEQWidget/widgets/FrequencyPlotView.cpp

@@ -180,7 +180,11 @@ void FrequencyPlotView::wheelEvent(QWheelEvent* event)
 {
 	event->accept();
 	int delta = event->angleDelta().y();
+#if QT_VERSION < QT_VERSION_CHECK(5, 14, 0)
+    zoom(delta, delta, event->x(), event->y());
+#else
     zoom(delta, delta, event->position().x(), event->position().y());
+#endif
 }
 
 void FrequencyPlotView::scrollContentsBy(int dx, int dy)