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// Copyright 2015 The Cobalt Authors. 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_