GUI.h

#ifndef _GUI_H
#define _GUI_H

#include "GFX.h"

// Assign human-readable names to some common 16-bit color values:
#define BLACK   0x0000
#define BLUE    0x001F
#define RED     0xF800
#define GREEN   0x07E0
#define CYAN    0x07FF
#define MAGENTA 0xF81F
#define YELLOW  0xFFE0
#define WHITE   0xFFFF


namespace GUI {
  
  void InitGFX(GFX *gfx);

  GFX *getGFX();

   class Scale {
        private:
          float a;
          float b;
  
        public:
          Scale(float x1, float y1, float x2, float y2);
          float convert(float x);
    };
    
  

  ////////////////////////////////////////////
  // messages

  // base message
  class Message {
     public:
        Message(uint8_t _msg, void *_sender);
        uint8_t msg;
        void *sender;
  };

  // touch message
  #define TOUCH_MSG 1
  class TouchMessage : public Message {
      public:
        TouchMessage(void *_sender, uint16_t _x, uint16_t _y);
        uint16_t x;
        uint16_t y;
  };

  #define TIMER_MSG 2
  class TimerMessage : public Message {
     public:
        TimerMessage(long _ticks);
        long ticks;
    
  };


  ///////////////////////////////////////////////////
  // Widget

  struct Rect {
    public:
      uint16_t x;
      uint16_t y;
      uint16_t width;
      uint16_t height;

     //  Rect(uint16_t _x, uint16_t _y, uint16_t _width, uint16_t _height);

      
     
  };

  bool rect_intersect(const Rect *another);
  bool rect_contains(const Rect *,uint16_t x,uint16_t y); 
    

  ////////////////////////////////////////////////////////////////////////////////////
  // Components

  class BaseUI {

      public:
        // dispatch the message and return if the message is consumed
        virtual bool dispatchMessage(Message *msg) = 0;

        // send a new message
        virtual void sendMessage(Message *msg) = 0;

  };


  // every widget has a dispatchMessage
  class BaseWidget : public BaseUI {
     public:
      BaseWidget(BaseUI *_parent);
      // startup phase
      virtual void startup() = 0;
      // draw the button
      virtual void draw() = 0;
      // dispatch the message and return if the message is consumed
      virtual bool dispatchMessage(Message *msg) = 0;
      virtual void sendMessage(Message *msg);
    
    protected:
      // every widgets has a parent, for dispatching
      BaseUI *parent;
      
  };

  #define BUTTON_PRESSED 10
  // wrapper
  class Button : public BaseWidget {

      public:
          Button(BaseUI *_parent,const GUI::Rect *_r,char *_str, uint8_t _text_size);
          virtual void startup();
          virtual void draw();
          virtual bool dispatchMessage(Message *msg);

      private:
      
          const GUI::Rect *rect;
          uint8_t text_size;
          char *str;
          void _draw(bool inverted = false);
  };


}

#endif