Disable qtquickcontrols context menu on eglfs

Qt Quick Controls 1 always creates "native" windows
for popups, however it does not check if the platform
can support creating "native" windows. As a workaround
disable context menu until Qt Quick Controls 2 are
in place.

Task-number: QTBUG-53467
Change-Id: Iea32e19f256f3d7e81a61e23f7da64dfc7ec660d
Reviewed-by: Allan Sandfeld Jensen <allan.jensen@qt.io>

src/webengine/api/qquickwebengineview.cpp

@@ -115,6 +115,8 @@ QQuickWebEngineViewPrivate::QQuickWebEngineViewPrivate()
     , m_dpiScale(1.0)
     , m_backgroundColor(Qt::white)
     , m_defaultZoomFactor(1.0)
+    // QTBUG-53467
+    , m_menuEnabled(true)
 {
     // The gold standard for mobile web content is 160 dpi, and the devicePixelRatio expected
     // is the (possibly quantized) ratio of device dpi to 160 dpi.
@@ -132,6 +134,8 @@ QQuickWebEngineViewPrivate::QQuickWebEngineViewPrivate()
         // 1x, 2x, 3x etc assets that fit an integral number of pixels.
         setDevicePixelRatio(qMax(1, qRound(webPixelRatio)));
     }
+    if (platform == QLatin1Literal("eglfs"))
+        m_menuEnabled = false;
 #ifndef QT_NO_ACCESSIBILITY
     QAccessible::installFactory(&webAccessibleFactory);
 #endif // QT_NO_ACCESSIBILITY
@@ -182,6 +186,12 @@ bool QQuickWebEngineViewPrivate::contextMenuRequested(const WebEngineContextMenu
 {
     Q_Q(QQuickWebEngineView);
 
+    if (!m_menuEnabled) {
+        qWarning("You are trying to open context menu on eglfs backend, which is not currently supported\n"
+                 "See QTBUG-53467.");
+        return false;
+    }
+
     // Assign the WebEngineView as the parent of the menu, so mouse events are properly propagated
     // on OSX.
     QObject *menu = ui()->addMenu(q, QString(), data.pos);

src/webengine/api/qquickwebengineview_p_p.h

@@ -215,6 +215,8 @@ private:
     qreal m_dpiScale;
     QColor m_backgroundColor;
     qreal m_defaultZoomFactor;
+    // QTBUG-53467
+    bool m_menuEnabled;
 };
 
 #ifndef QT_NO_ACCESSIBILITY