axmol/cocos/2d/CCEventListener.h

84 lines
2.9 KiB
C++

/****************************************************************************
Copyright (c) 2013 cocos2d-x.org
http://www.cocos2d-x.org
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.
****************************************************************************/
#ifndef cocos2d_libs_EventListener_h
#define cocos2d_libs_EventListener_h
#include "CCPlatformMacros.h"
#include "CCObject.h"
#include <functional>
#include <string>
#include <memory>
#include <set>
NS_CC_BEGIN
class Event;
class Node;
/**
* The base class of event listener.
* If you need custom listener which with different callback, you need to inherit this class.
* For instance, you could refer to EventListenerAcceleration, EventListenerKeyboard, EventListenerTouchOneByOne, EventListenerCustom.
*/
class EventListener : public Object
{
protected:
/** Constructor */
EventListener();
/** Initializes event with type and callback function */
bool init(const std::string& t, std::function<void(Event*)>callback);
public:
/** Destructor */
virtual ~EventListener();
/** Checks whether the listener is available. */
virtual bool checkAvailable() = 0;
/** Clones the listener, its subclasses have to override this method. */
virtual EventListener* clone() = 0;
inline bool isPaused() const { return _paused; };
inline bool isRegistered() const { return _isRegistered; };
protected:
std::function<void(Event*)> _onEvent; /// Event callback function
std::string _type; /// Event type
bool _isRegistered; /// Whether the listener has been added to dispatcher.
// The priority of event listener
int _fixedPriority; // The higher the number, the higher the priority, 0 is for scene graph base priority.
Node* _node; // scene graph based priority
bool _paused;
private:
friend class EventDispatcher;
};
NS_CC_END
#endif