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Button.h

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#ifndef __Button_H__
#define __Button_H__

// Includes
#include "StringId.h"
#include "Sprite.h"
#include "Array.h"
#include "Resource_BitmapStrip.h"

// Forward declares
class SpriteManager;

// Button
class Button:public Sprite
   {
   public:
      Button();
      Button(SpriteManager* spriteManager);
      virtual ~Button();

      enum State
         {
         State_Normal,
         State_Highlighted,
         State_Pressed,
         State_Disabled,
         
         States_Count,
         };

      virtual const Resource_BitmapStrip& GetBitmap() const;
      virtual const Resource_BitmapStrip& GetBitmap(State state) const;
      virtual void SetBitmap(State state, const Resource_BitmapStrip& bitmapStrip);

      virtual State GetState() const;
      virtual void SetState(State state);

      virtual bool IsEnabled() const;
      virtual void SetEnabled(bool enabled); 

      virtual StringId GetEventId() const;
      virtual void SetEventId(StringId eventId);

      virtual void* GetEventUserData() const;
      virtual void SetEventUserData(void* userData);

      virtual float GetCrossFadeTime() const;
      virtual void SetCrossFadeTime(float time = 0.0f );

   protected:
      friend class SpriteAction_ButtonStateCrossFade;

      virtual void SetStateCrossFadeAlpha(unsigned char fromAlpha, unsigned char toAlpha);

      virtual void Render(Bitmap& bitmap);
      virtual bool OnMouseOver(int x, int y, bool button, StringId& eventId, void*& userData);
      

   private:
      State state_;
      Resource_BitmapStrip bitmapStrips_[States_Count];
      bool enabled_;
      bool highlighted_;
      StringId eventId_;
      void* eventUserData_;
      float stateCrossFadeTime_;
      State stateCrossFadeFromState_;
      unsigned char stateCrossFadeFromAlpha_;
      unsigned char stateCrossFadeToAlpha_;
   };


#endif /* __Button_H__ */

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