EventDispatcher.h

// Copyright (c) 2016-2018 Kiwano - Nomango
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
// THE SOFTWARE.
 
#pragma once
#include <kiwano/event/listener/EventListener.h>
 
namespace kiwano
{
 
typedef IntrusiveList<RefPtr<EventListener>> ListenerList;
 
class KGE_API EventDispatcher : protected IntrusiveListValue<EventDispatcher*>
{
    friend IntrusiveList<EventDispatcher*>;
 
public:
    EventListener* AddListener(RefPtr<EventListener> listener);
 
    EventListener* AddListener(EventType type, EventListener::Callback callback);
 
    EventListener* AddListener(StringView name, EventType type, EventListener::Callback callback);
 
    template <typename _EventTy>
    EventListener* AddListener(EventListener::Callback callback)
    {
        static_assert(std::is_base_of<Event, _EventTy>::value, "_EventTy is not an event type.");
        return AddListener(KGE_EVENT(_EventTy), callback);
    }
 
    template <typename _EventTy>
    EventListener* AddListener(StringView name, EventListener::Callback callback)
    {
        static_assert(std::is_base_of<Event, _EventTy>::value, "_EventTy is not an event type.");
        return AddListener(name, KGE_EVENT(_EventTy), callback);
    }
 
    void StartListeners(StringView name);
 
    void StopListeners(StringView name);
 
    void RemoveListeners(StringView name);
 
    void StartAllListeners();
 
    void StopAllListeners();
 
    void RemoveAllListeners();
 
    const ListenerList& GetAllListeners() const;
 
    virtual bool DispatchEvent(Event* evt);
 
private:
    ListenerList listeners_;
};
}  // namespace kiwano