QmlDesigner: Fix propertyGroups.json warning for 2D projects

Load property groups file only if Quick3D import exists

Change-Id: Idf7b95cb4efa34dde6196964e5e2cbad54341193
Reviewed-by: Miikka Heikkinen <miikka.heikkinen@qt.io>

src/plugins/qmldesigner/components/materialbrowser/materialbrowsermodel.cpp

@@ -95,8 +95,9 @@ bool MaterialBrowserModel::isValidIndex(int idx) const
  * propertyGroups.json contains lists of QtQuick3D objects' properties grouped by sections
  *
  * @param path path to propertyGroups.json file
+ * @return load successful
  */
-void MaterialBrowserModel::loadPropertyGroups(const QString &path)
+bool MaterialBrowserModel::loadPropertyGroups(const QString &path)
 {
     bool ok = true;
 
@@ -131,6 +132,8 @@ void MaterialBrowserModel::loadPropertyGroups(const QString &path)
             m_customMaterialSections.append(customMatSections);
     }
     emit materialSectionsChanged();
+
+    return ok;
 }
 
 QHash<int, QByteArray> MaterialBrowserModel::roleNames() const

src/plugins/qmldesigner/components/materialbrowser/materialbrowsermodel.h

@@ -79,7 +79,7 @@ public:
     void updateSelectedMaterial();
     int materialIndex(const ModelNode &material) const;
     ModelNode materialAt(int idx) const;
-    void loadPropertyGroups(const QString &path);
+    bool loadPropertyGroups(const QString &path);
 
     void resetModel();
 

src/plugins/qmldesigner/components/materialbrowser/materialbrowserview.cpp

@@ -128,14 +128,12 @@ void MaterialBrowserView::modelAttached(Model *model)
 {
     AbstractView::modelAttached(model);
 
-    QString matPropsPath = model->metaInfo("QtQuick3D.Material").importDirectoryPath()
-                           + "/designer/propertyGroups.json";
-    m_widget->materialBrowserModel()->loadPropertyGroups(matPropsPath);
-
     m_widget->clearSearchFilter();
     m_widget->materialBrowserModel()->setHasMaterialRoot(rootModelNode().isSubclassOf("QtQuick3D.Material"));
     m_hasQuick3DImport = model->hasImport("QtQuick3D");
 
+    loadPropertyGroups();
+
     // Project load is already very busy and may even trigger puppet reset, so let's wait a moment
     // before refreshing the model
     QTimer::singleShot(1000, this, [this]() {
@@ -295,6 +293,16 @@ void MaterialBrowserView::nodeRemoved(const ModelNode &removedNode,
     m_widget->materialBrowserModel()->updateSelectedMaterial();
 }
 
+void QmlDesigner::MaterialBrowserView::loadPropertyGroups()
+{
+    if (!m_hasQuick3DImport || m_propertyGroupsLoaded)
+        return;
+
+    QString matPropsPath = model()->metaInfo("QtQuick3D.Material").importDirectoryPath()
+                               + "/designer/propertyGroups.json";
+    m_propertyGroupsLoaded = m_widget->materialBrowserModel()->loadPropertyGroups(matPropsPath);
+}
+
 void MaterialBrowserView::importsChanged(const QList<Import> &addedImports, const QList<Import> &removedImports)
 {
     Q_UNUSED(addedImports)
@@ -307,6 +315,8 @@ void MaterialBrowserView::importsChanged(const QList<Import> &addedImports, cons
 
     m_hasQuick3DImport = hasQuick3DImport;
 
+    loadPropertyGroups();
+
     // Import change will trigger puppet reset, so we don't want to update previews immediately
     refreshModel(false);
 }

src/plugins/qmldesigner/components/materialbrowser/materialbrowserview.h

@@ -70,6 +70,8 @@ private:
     bool m_hasQuick3DImport = false;
     bool m_autoSelectModelMaterial = false; // TODO: wire this to some action
     bool m_puppetResetPending = false;
+    bool m_propertyGroupsLoaded = false;
+    void loadPropertyGroups();
 };
 
 } // namespace QmlDesigner