#ifndef zori_H_INCLUDED
#define zori_H_INCLUDED

#include "eruta.h"
#include "rebox.h"
#include "miao.h"

/* Typedefs for possible later portability. */
typedef ALLEGRO_COLOR zori_color ;
typedef ALLEGRO_BITMAP zori_bitmap ;
typedef ALLEGRO_FONT zori_font ;

typedef ALLEGRO_EVENT zori_system_event;
typedef ALLEGRO_EVENT_TYPE zori_event_type;
typedef ALLEGRO_DISPLAY zori_display;

typedef Point zori_point;
typedef Rebox zori_rebox;
typedef int zori_id;

#define ZORI_ID_OK_P(ID)  ((ID) > -1)
#define ZORI_ID_OK        ((zori_id)(0))
#define ZORI_ID_ERROR     ((zori_id)(-1))
#define ZORI_ID_ENOMEM    ((zori_id)(-2))
#define ZORI_ID_EINVAL    ((zori_id)(-3))


struct zori_widget;

struct zori_event {
  zori_system_event    sysev;
  struct zori_widget * widget;
  void               * data; 
};


struct zori_stylepart {
  zori_color       color;
  zori_bitmap    * image;
  zori_font      * font;
};

struct zori_style {
  struct zori_stylepart fore;
  struct zori_stylepart back;
  struct zori_stylepart text;
};

struct zori_widget;

typedef int zori_handler_func(struct zori_event * event);

struct zori_handler {
  zori_event_type type;
  zori_handler_func * handler;
  void * data;
};


/* System event handlers. */
struct zori_handlers miao_of_type(struct zori_handler);

/*
struct zori_handlers {
  size_t size;  
  struct zori_handler * handlers;
};
*/


/* Mouse or keyboard/joystick cursor. */
struct zori_cursor { 
  zori_point           p; 
  struct zori_widget * hover;
  struct zori_widget * focus;
  zori_bitmap        * bitmap;
};


/* Support multiple cursors...  */
struct zori_cursors { 
  struct zori_cursor mouse;
  struct zori_cursor keyjoy;
};


/*
on_enter
on_enter(data = {})
on_event(*args)
on_event(*data)
on_key_down(*args)
on_leave(name=nil)
on_mouse_axes(t, x, y, z, w, dx, dy, dz, dw)
on_mouse_button_down(t, x, y, z, w, b)
on_mouse_button_up(t, x, y, z, w, b)
on_mouse_in(x, y, from)
on_mouse_out(x, y, to)
on_resize
*/

struct zori_widget {
  /* ID of the widget, used in most external API's. */
  zori_id id;
  
  /* Root level widget under which this widget is active. */
  struct zori_widget  * root;
  
  /* Position and size of the widget. */
  zori_rebox box;
  /* Z ordering. */
  int z;
  
  /* Style. */
  struct zori_style    style;
  
  /* Handlers. */
  struct zori_handlers handlers;
  
  /* Related widgets. */
  struct zori_widget * parent;
  struct zori_widget * child;
  struct zori_widget * sibling;
};


/* An array of widget pointers. */
struct zori_widget_array {
  struct zori_widget * array;
  size_t size;
};

/* Root level widget. */
struct zori_root {  
  /* A root is a widget. */ 
  struct zori_widget widget;
  /* It also manages the cursors*/
  struct zori_cursors cursors;
  /* It has an array of all widgets it manages. */
  struct zori_widget_array * widgets;
  /* It is linked to a particular display. */
  zori_display * display;  
};



zori_id zori_set_background_color(zori_id id, zori_color color);
zori_id zori_set_foreground_color(zori_id id, zori_color color);
zori_id zori_new_root_widget(const struct zori_style * style);
zori_id zori_new_frame_widget(zori_id parent);


zori_id zori_register(zori_id id,  zori_event_type type, zori_handler_func handler, void * extra);





#endif