#ifndef __event_h__
#define __event_h__



// all gui events

typedef struct {
  int key; 
  float x; // relative x coordinate
  float y; // relative y coordinate
} keyboard_event_t;

typedef struct {
  int button;
  float x; // relative x coordinate
  float y; // relative y coordinate
} mouse_event_t;

typedef struct {
  float *vec;
  int elements;
} array_event_t;

typedef struct {
  int key;
  int start;
  int length;
} range_event_t;



typedef struct {
    void *receiver;   // receiving object (null -> gui)
    void *sender;     // sending object
    int type;         // selector

    union {
	int i;
	float f;
	keyboard_event_t keyboard;
	mouse_event_t mouse;
	array_event_t array;
	range_event_t range;
    } e;

} event_t;

// events : protocol between gui and core thread

#define NONE 0         // null
#define MOTION 1       // mouse_event_t
#define PRESS 2        
#define RELEASE 3
#define KEY_PRESS 4    // key_event_t
#define KEY_RELEASE 5
#define ARRAY 6        // array_event_t
#define SELECTION 7    // range_event_t
#define VIEW 8
#define POINT 9        // point_event_t
#define SUICIDE 10     // null
#define REDRAW 11
#define REQ_ARRAY 12   // nul
#define OUTLET_RANGE 13 // range_event_t
#define CENTER 14      // center view

typedef void (*event_handler_t)(void *object, event_t *e);

#endif