Qt5: fix deprecation warnings of QWheelEvent in Qt 5.15

src/Mod/Drawing/Gui/DrawingView.cpp

@@ -197,7 +197,11 @@ void SvgView::paintEvent(QPaintEvent *event)
 
 void SvgView::wheelEvent(QWheelEvent *event)
 {
+#if QT_VERSION >= QT_VERSION_CHECK(5,0,0)
+    int delta = -event->angleDelta().y();
+#else
     int delta = -event->delta();
+#endif
     if (m_invertZoom)
         delta = -delta;
     qreal factor = std::pow(1.2, delta / 240.0);

src/Mod/Image/Gui/ImageView.cpp

@@ -476,11 +476,21 @@ void ImageView::wheelEvent(QWheelEvent * cEvent)
        // Mouse event coordinates are relative to top-left of image view (including toolbar!)
        // Get current cursor position relative to top-left of image box
        QPoint offset = _pGLImageBox->pos();
+#if QT_VERSION >= QT_VERSION_CHECK(5,15,0)
+       QPoint pos = cEvent->position().toPoint();
+       int box_x = pos.x() - offset.x();
+       int box_y = pos.y() - offset.y();
+#else
        int box_x = cEvent->x() - offset.x();
        int box_y = cEvent->y() - offset.y();
+#endif
 
        // Zoom around centrally displayed image point
+#if QT_VERSION >= QT_VERSION_CHECK(5,0,0)
+       int numTicks = cEvent->angleDelta().y() / 120;
+#else
        int numTicks = cEvent->delta() / 120;
+#endif
        if (_invertZoom)
            numTicks = -numTicks;
 

src/Mod/TechDraw/Gui/QGVPage.cpp

@@ -1026,7 +1026,12 @@ void QGVPage::wheelEvent(QWheelEvent *event)
     }
 
     QPointF center = mapToScene(viewport()->rect().center());
-    qreal factor = std::pow(mouseBase, event->delta() / mouseAdjust);
+#if QT_VERSION >= QT_VERSION_CHECK(5,0,0)
+    int delta = event->angleDelta().y();
+#else
+    int delta = event->delta();
+#endif
+    qreal factor = std::pow(mouseBase, delta / mouseAdjust);
     scale(factor, factor);
 
     QPointF newCenter = mapToScene(viewport()->rect().center());

src/Mod/Web/Gui/BrowserView.cpp

@@ -277,7 +277,11 @@ void WebView::mousePressEvent(QMouseEvent *event)
 void WebView::wheelEvent(QWheelEvent *event)
 {
     if (QApplication::keyboardModifiers() & Qt::ControlModifier) {
+#if QT_VERSION >= QT_VERSION_CHECK(5, 0, 0)
+        qreal factor = zoomFactor() + (-event->angleDelta().y() / 800.0);
+#else
         qreal factor = zoomFactor() + (-event->delta() / 800.0);
+#endif
         setZoomFactor(factor);
         event->accept();
         return;