| // Copyright 2015 Google Inc. All Rights Reserved. |
| // |
| // Licensed under the Apache License, Version 2.0 (the "License"); |
| // you may not use this file except in compliance with the License. |
| // You may obtain a copy of the License at |
| // |
| // http://www.apache.org/licenses/LICENSE-2.0 |
| // |
| // Unless required by applicable law or agreed to in writing, software |
| // distributed under the License is distributed on an "AS IS" BASIS, |
| // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| // See the License for the specific language governing permissions and |
| // limitations under the License. |
| |
| #ifndef COBALT_BASE_EVENT_H_ |
| #define COBALT_BASE_EVENT_H_ |
| |
| #include "cobalt/base/type_id.h" |
| |
| namespace base { |
| |
| // Event is an abstract, generic class representing some system event that |
| // occured. Event producers like a SystemWindow will produce these events |
| // and dispatch them to the registered callbacks. |
| // Derived classes should add the BASE_EVENT_SUBCLASS() macro to their public |
| // attributes. |
| class Event { |
| public: |
| virtual ~Event() {} |
| virtual base::TypeId GetTypeId() const = 0; |
| }; |
| |
| #define BASE_EVENT_SUBCLASS(name) \ |
| static base::TypeId TypeId() { return base::GetTypeId<name>(); } \ |
| base::TypeId GetTypeId() const override { return TypeId(); } |
| |
| } // namespace base |
| |
| #endif // COBALT_BASE_EVENT_H_ |