diff --git a/ArchitectureColoredPainting/src/Editor/LayerWrapper.cpp b/ArchitectureColoredPainting/src/Editor/LayerWrapper.cpp
index 770c45d..bf0222b 100644
--- a/ArchitectureColoredPainting/src/Editor/LayerWrapper.cpp
+++ b/ArchitectureColoredPainting/src/Editor/LayerWrapper.cpp
@@ -413,4 +413,19 @@ bool FolderLayerWrapper::deleteable(bool excludeSubTree) const
         return this->getReferencedBy() == -1;
 	else
 		return this->referencedCount() == 0;
+}
+
+bool LayerWrapper::referencingGroupElement() const
+{
+	return false;
+}
+
+bool LeafLayerWrapper::referencingGroupElement() const
+{
+	return typeid(*wrappedElement) == typeid(GroupElement);
+}
+
+bool LayerWrapper::canApplyStyles() const
+{
+	return typeid(*this) == typeid(LeafLayerWrapper) && !referencingGroupElement();
 }
\ No newline at end of file
diff --git a/ArchitectureColoredPainting/src/Editor/LayerWrapper.h b/ArchitectureColoredPainting/src/Editor/LayerWrapper.h
index b62d685..947d90c 100644
--- a/ArchitectureColoredPainting/src/Editor/LayerWrapper.h
+++ b/ArchitectureColoredPainting/src/Editor/LayerWrapper.h
@@ -73,6 +73,8 @@ class LayerWrapper
     virtual void refreshTreeItem();
 	virtual size_t referencedCount(bool excludeSelf = false) const;
     virtual bool deleteable(bool excludeSubTree = false) const;
+    virtual bool referencingGroupElement() const;
+    bool canApplyStyles() const;
 };
 
 class FolderLayerWrapper : public LayerWrapper
@@ -117,6 +119,7 @@ class LeafLayerWrapper : public LayerWrapper
     void collectDownReachable(std::set<LayerWrapper*>& reachable) override;
     QTreeWidgetItem* getQTreeItem() override;
     void refreshTreeItem() override;
+    bool referencingGroupElement() const override;
 };
 
 Q_DECLARE_METATYPE(LayerWrapper *)