[server] Implement raise/lower in QtExtendedSurfaceInterface

src/wayland/server/qtsurfaceextension_interface.cpp

@@ -151,15 +151,13 @@ const struct qt_extended_surface_interface QtExtendedSurfaceInterface::Private::
 void QtExtendedSurfaceInterface::Private::lowerCallback(wl_client *client, wl_resource *resource)
 {
     Q_UNUSED(client)
-    Q_UNUSED(resource)
-    // ignore
+    emit cast<Private>(resource)->q_func()->lowerRequested();
 }
 
 void QtExtendedSurfaceInterface::Private::raiseCallback(wl_client *client, wl_resource *resource)
 {
     Q_UNUSED(client)
-    Q_UNUSED(resource)
-    // ignore
+    emit cast<Private>(resource)->q_func()->raiseRequested();
 }
 
 void QtExtendedSurfaceInterface::Private::setContentOrientationMaskCallback(wl_client *client, wl_resource *resource, int32_t orientation)

src/wayland/server/qtsurfaceextension_interface.h

@@ -65,6 +65,18 @@ public:
 
     void close();
 
+Q_SIGNALS:
+    /**
+     * Requests that the window be raised to appear above other windows.
+     * @since 5.5
+     **/
+    void raiseRequested();
+    /**
+     * Requests that the window be lowered to appear below other windows.
+     * @since 5.5
+     **/
+    void lowerRequested();
+
 private:
     friend class QtSurfaceExtensionInterface;
     explicit QtExtendedSurfaceInterface(QtSurfaceExtensionInterface *shell, SurfaceInterface *parent, wl_resource *parentResource);