Updated schema

comdel/display/schema_display.cpp

@@ -9,11 +9,11 @@ Schema::Schema()
 }
 
 
-void Schema::setSchema(std::optional<domain::Schema> schema)
+void Schema::setSchema(domain::Schema* schema)
 {
     scene.clear();
     this->schema = schema;
-    if(schema.has_value()) {
+    if(schema != nullptr) {
         for(auto &instance: schema->instances) {
             ComponentWrapper *group = nullptr;
             auto component = dynamic_cast<domain::ComponentInstance*>(instance);

comdel/display/schema_display.h

@@ -14,12 +14,12 @@ class Schema: public QGraphicsView
 public:
     Schema();
 
-    void setSchema(std::optional<domain::Schema> schema);
+    void setSchema(domain::Schema* schema);
 
 private:
     QGraphicsScene scene;
 
-    std::optional<domain::Schema> schema;
+    domain::Schema* schema;
 
 };