make update_state pure virtual, use Object instead of gate

2 files changed, 7 insertions, 5 deletions

diff --git a/MainWindow.cpp b/MainWindow.cpp
index 19012ec..9de495a 100644
--- a/MainWindow.cpp
+++ b/MainWindow.cpp
@@ -507,11 +507,12 @@ void
 MainWindow::update_object_state(Object *object)
 {
 	object->update_state();
-	/* update all gates that are using this gate as an input */
-	Gate *object2;
-	for(auto o = object->get_output_objects()->begin(); o != object->get_output_objects()->end(); ++o)
+	/* update all objects that are using this object as an input */
+	Object *object2;
+	auto output_objects = object->get_output_objects();
+	for(auto o = output_objects->begin(); o != output_objects->end(); ++o)
 	{
-		object2 = (Gate*)find_object_by_id((*o));
+		object2 = find_object_by_id((*o));
 		if (object2)
 		{
 			update_object_state(object2);
@@ -519,6 +520,7 @@ MainWindow::update_object_state(Object *object)
 	}
 }
 
+
 void
 MainWindow::find_selected_input(int x, int y)
 {
diff --git a/Object.h b/Object.h
index e4e504b..f295491 100644
--- a/Object.h
+++ b/Object.h
@@ -55,7 +55,7 @@ class Object
 		
 		void add_output_object_id(int id_) { this->output_object_ids.push_back(id_); };
 
-		virtual void update_state() {}; // subclasses must implement
+		virtual void update_state() = 0; // subclasses must implement
 
 		static void set_object_id_counter(int id_) { object_id_counter = id_; };
 		static int get_object_id_counter() { return object_id_counter; };