EventHandler.h

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#pragma once
 
#include <array>
#include <functional>
#include <list>
#include <unordered_map>
 
namespace bWidgets {
 
class bwEvent;
class bwMouseButtonEvent;
class bwMouseButtonDragEvent;
class bwMouseWheelEvent;
 
namespace bwScreenGraph {
 
class Node;
 
// TODO bwHandlingContext
using EventListener = std::function<void(Node&)>;
 
class EventHandler {
 public:
  enum EventType {
    MOUSE_ENTER,
    MOUSE_LEAVE,
 
    TOT_EVENT_TYPES,
  };
 
  EventHandler() = default;
  virtual ~EventHandler() = default;
 
  void addEventListener(EventType event_type, EventListener listener);
 
  virtual void onMouseMove(bwEvent&);
  virtual void onMouseEnter(bwEvent&);
  virtual void onMouseLeave(bwEvent&);
  virtual void onMousePress(bwMouseButtonEvent&);
  virtual void onMouseRelease(bwMouseButtonEvent&);
  virtual void onMouseClick(bwMouseButtonEvent&);
  virtual void onMouseDrag(bwMouseButtonDragEvent&);
  virtual void onMouseWheel(bwMouseWheelEvent&);
 
 private:
  std::array<std::list<EventListener>, TOT_EVENT_TYPES> listeners;
  //    std::unordered_map<EventType, std::list<EventListener>> listener_map;
};
 
}  // namespace bwScreenGraph
}  // namespace bWidgets