Scene: add a setStatus method

Will allow to set the status in the backend and update the frontend with it.

Change-Id: Iac47e9960b8ef56c4e45ea31c616c4bc2a8f3444
Task-number: QTBUG-54889
Reviewed-by: Sean Harmer <sean.harmer@kdab.com>

3 files changed, 34 insertions, 0 deletions

diff --git a/src/render/io/scene.cpp b/src/render/io/scene.cpp
index bfb5e4571..cf1ca4736 100644
--- a/src/render/io/scene.cpp
+++ b/src/render/io/scene.cpp
@@ -65,6 +65,16 @@ void Scene::cleanup()
     m_source.clear();
 }
 
+void Scene::setStatus(QSceneLoader::Status status)
+{
+    // Send the new subtree to the frontend or notify failure
+    auto e = Qt3DCore::QPropertyUpdatedChangePtr::create(peerId());
+    e->setDeliveryFlags(Qt3DCore::QSceneChange::DeliverToAll);
+    e->setPropertyName("status");
+    e->setValue(QVariant::fromValue(status));
+    notifyObservers(e);
+}
+
 void Scene::initializeFromPeer(const Qt3DCore::QNodeCreatedChangeBasePtr &change)
 {
     const auto typedChange = qSharedPointerCast<Qt3DCore::QNodeCreatedChange<QSceneLoaderData>>(change);
diff --git a/src/render/io/scene_p.h b/src/render/io/scene_p.h
index fc3494489..42e3121c9 100644
--- a/src/render/io/scene_p.h
+++ b/src/render/io/scene_p.h
@@ -52,6 +52,7 @@
 //
 
 #include <Qt3DRender/private/backendnode_p.h>
+#include <Qt3DRender/qsceneloader.h>
 #include <QtGlobal>
 #include <QUrl>
 
@@ -77,6 +78,7 @@ public:
     void setSceneManager(SceneManager *manager);
 
     void cleanup();
+    void setStatus(QSceneLoader::Status status);
 
 private:
     void initializeFromPeer(const Qt3DCore::QNodeCreatedChangeBasePtr &change) Q_DECL_FINAL;
diff --git a/tests/auto/render/sceneloader/tst_sceneloader.cpp b/tests/auto/render/sceneloader/tst_sceneloader.cpp
index 7d31590d9..05f4f08b6 100644
--- a/tests/auto/render/sceneloader/tst_sceneloader.cpp
+++ b/tests/auto/render/sceneloader/tst_sceneloader.cpp
@@ -149,6 +149,28 @@ private Q_SLOTS:
 
         arbiter.events.clear();
     }
+
+    void checkStatusTransmission()
+    {
+        // GIVEN
+        TestRenderer renderer;
+        TestArbiter arbiter;
+        Qt3DRender::Render::Scene sceneLoader;
+
+        Qt3DCore::QBackendNodePrivate::get(&sceneLoader)->setArbiter(&arbiter);
+        sceneLoader.setRenderer(&renderer);
+
+        // WHEN
+        sceneLoader.setStatus(Qt3DRender::QSceneLoader::Ready);
+
+        // THEN
+        Qt3DCore::QPropertyUpdatedChangePtr change = arbiter.events.first().staticCast<Qt3DCore::QPropertyUpdatedChange>();
+        QCOMPARE(arbiter.events.count(), 1);
+        QCOMPARE(change->propertyName(), "status");
+        QCOMPARE(change->value().value<Qt3DRender::QSceneLoader::Status>(), Qt3DRender::QSceneLoader::Ready);
+
+        arbiter.events.clear();
+    }
 };
 
 // Note: setSceneSubtree needs a QCoreApplication