MouseEventFilter: handle HoverMove events

When using Scene3D, there are no MouseMove events. Instead there are HoverMove
events being generated. For that reason we intercept these to allow the
MouseHandlers to receive positionChanged events when used with Scene3D

Change-Id: I638a86a1b574e3f99163e0b1b13cb47c83acdc1e
Reviewed-by: Sean Harmer <sean.harmer@kdab.com>

src/input/backend/mouseeventfilter.cpp

@@ -64,6 +64,14 @@ bool MouseEventFilter::eventFilter(QObject *obj, QEvent *e)
 {
     Q_UNUSED(obj);
     switch (e->type()) {
+    // When dealing with QtQuick events, there are nove MouseMove events
+    // only hover events which are transmitted if hoverEnabled was set to true on the Scene3D
+    case QEvent::HoverMove:
+    {
+        const QHoverEvent *event = static_cast<QHoverEvent *>(e);
+        m_inputHandler->appendMouseEvent(QMouseEvent(QEvent::MouseMove, event->posF(), Qt::NoButton,  Qt::NoButton, event->modifiers()));
+        break;
+    }
     case QEvent::MouseButtonPress:
     case QEvent::MouseButtonRelease:
     case QEvent::MouseMove: