event.h

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#ifndef BJ_EVENT_H
#define BJ_EVENT_H
 
#include <banjo/api.h>
 
struct bj_window;

#define BJ_BUTTON_1      1
#define BJ_BUTTON_2      2
#define BJ_BUTTON_3      3
#define BJ_BUTTON_4      4
#define BJ_BUTTON_5      5
#define BJ_BUTTON_LEFT   BJ_BUTTON_1
#define BJ_BUTTON_RIGHT  BJ_BUTTON_3
#define BJ_BUTTON_MIDDLE BJ_BUTTON_2
#define BJ_BUTTON_UP     BJ_BUTTON_4
#define BJ_BUTTON_DOWN   BJ_BUTTON_5

enum bj_key {
    BJ_KEY_UNKNOWN             = 0x00,  
    BJ_KEY_LBUTTON             = 0x01,  
    BJ_KEY_RBUTTON             = 0x02,  
    BJ_KEY_CANCEL              = 0x03,  
    BJ_KEY_MBUTTON             = 0x04,  
    BJ_KEY_XBUTTON1            = 0x05,  
    BJ_KEY_XBUTTON2            = 0x06,  
    // 0x07     Reserved
    BJ_KEY_BACK                = 0x08,  
    BJ_KEY_TAB                 = 0x09,  
    // 0x0A-0B  Reserved
    BJ_KEY_CLEAR               = 0x0C,  
    BJ_KEY_RETURN              = 0x0D,  
    // 0x0E-0F  Unassigned
    BJ_KEY_SHIFT               = 0x10,  
    BJ_KEY_CONTROL             = 0x11,  
    BJ_KEY_MENU                = 0x12,  
    BJ_KEY_PAUSE               = 0x13,  
    BJ_KEY_CAPITAL             = 0x14,  
    BJ_KEY_KANA                = 0x15,  
    BJ_KEY_IME_ON              = 0x16,  
    BJ_KEY_JUNJA               = 0x17,  
    BJ_KEY_FINAL               = 0x18,  
    BJ_KEY_KANJI               = 0x19,  
    BJ_KEY_IME_OFF             = 0x1A,  
    BJ_KEY_ESCAPE              = 0x1B,  
    BJ_KEY_CONVERT             = 0x1C,  
    BJ_KEY_NONCONVERT          = 0x1D,  
    BJ_KEY_ACCEPT              = 0x1E,  
    BJ_KEY_MODECHANGE          = 0x1F,  
    BJ_KEY_SPACE               = 0x20,  
    BJ_KEY_PRIOR               = 0x21,  
    BJ_KEY_NEXT                = 0x22,  
    BJ_KEY_END                 = 0x23,  
    BJ_KEY_HOME                = 0x24,  
    BJ_KEY_LEFT                = 0x25,  
    BJ_KEY_UP                  = 0x26,  
    BJ_KEY_RIGHT               = 0x27,  
    BJ_KEY_DOWN                = 0x28,  
    BJ_KEY_SELECT              = 0x29,  
    BJ_KEY_PRINT               = 0x2A,  
    BJ_KEY_EXECUTE             = 0x2B,  
    BJ_KEY_SNAPSHOT            = 0x2C,  
    BJ_KEY_INSERT              = 0x2D,  
    BJ_KEY_DELETE              = 0x2E,  
    BJ_KEY_HELP                = 0x2F,  
    BJ_KEY_0                   = 0x30,  
    BJ_KEY_1                   = 0x31,  
    BJ_KEY_2                   = 0x32,  
    BJ_KEY_3                   = 0x33,  
    BJ_KEY_4                   = 0x34,  
    BJ_KEY_5                   = 0x35,  
    BJ_KEY_6                   = 0x36,  
    BJ_KEY_7                   = 0x37,  
    BJ_KEY_8                   = 0x38,  
    BJ_KEY_9                   = 0x39,  
    // 0x3A-40  Undefined
    BJ_KEY_A                   = 0x41,  
    BJ_KEY_B                   = 0x42,  
    BJ_KEY_C                   = 0x43,  
    BJ_KEY_D                   = 0x44,  
    BJ_KEY_E                   = 0x45,  
    BJ_KEY_F                   = 0x46,  
    BJ_KEY_G                   = 0x47,  
    BJ_KEY_H                   = 0x48,  
    BJ_KEY_I                   = 0x49,  
    BJ_KEY_J                   = 0x4A,  
    BJ_KEY_K                   = 0x4B,  
    BJ_KEY_L                   = 0x4C,  
    BJ_KEY_M                   = 0x4D,  
    BJ_KEY_N                   = 0x4E,  
    BJ_KEY_O                   = 0x4F,  
    BJ_KEY_P                   = 0x50,  
    BJ_KEY_Q                   = 0x51,  
    BJ_KEY_R                   = 0x52,  
    BJ_KEY_S                   = 0x53,  
    BJ_KEY_T                   = 0x54,  
    BJ_KEY_U                   = 0x55,  
    BJ_KEY_V                   = 0x56,  
    BJ_KEY_W                   = 0x57,  
    BJ_KEY_X                   = 0x58,  
    BJ_KEY_Y                   = 0x59,  
    BJ_KEY_Z                   = 0x5A,  
    BJ_KEY_LWIN                = 0x5B,  
    BJ_KEY_RWIN                = 0x5C,  
    BJ_KEY_APPS                = 0x5D,  
    // 0x5E     Reserved
    BJ_KEY_SLEEP               = 0x5F,  
    BJ_KEY_NUMPAD0             = 0x60,  
    BJ_KEY_NUMPAD1             = 0x61,  
    BJ_KEY_NUMPAD2             = 0x62,  
    BJ_KEY_NUMPAD3             = 0x63,  
    BJ_KEY_NUMPAD4             = 0x64,  
    BJ_KEY_NUMPAD5             = 0x65,  
    BJ_KEY_NUMPAD6             = 0x66,  
    BJ_KEY_NUMPAD7             = 0x67,  
    BJ_KEY_NUMPAD8             = 0x68,  
    BJ_KEY_NUMPAD9             = 0x69,  
    BJ_KEY_MULTIPLY            = 0x6A,  
    BJ_KEY_ADD                 = 0x6B,  
    BJ_KEY_SEPARATOR           = 0x6C,  
    BJ_KEY_SUBTRACT            = 0x6D,  
    BJ_KEY_DECIMAL             = 0x6E,  
    BJ_KEY_DIVIDE              = 0x6F,  
    BJ_KEY_F1                  = 0x70,  
    BJ_KEY_F2                  = 0x71,  
    BJ_KEY_F3                  = 0x72,  
    BJ_KEY_F4                  = 0x73,  
    BJ_KEY_F5                  = 0x74,  
    BJ_KEY_F6                  = 0x75,  
    BJ_KEY_F7                  = 0x76,  
    BJ_KEY_F8                  = 0x77,  
    BJ_KEY_F9                  = 0x78,  
    BJ_KEY_F10                 = 0x79,  
    BJ_KEY_F11                 = 0x7A,  
    BJ_KEY_F12                 = 0x7B,  
    BJ_KEY_F13                 = 0x7C,  
    BJ_KEY_F14                 = 0x7D,  
    BJ_KEY_F15                 = 0x7E,  
    BJ_KEY_F16                 = 0x7F,  
    BJ_KEY_F17                 = 0x80,  
    BJ_KEY_F18                 = 0x81,  
    BJ_KEY_F19                 = 0x82,  
    BJ_KEY_F20                 = 0x83,  
    BJ_KEY_F21                 = 0x84,  
    BJ_KEY_F22                 = 0x85,  
    BJ_KEY_F23                 = 0x86,  
    BJ_KEY_F24                 = 0x87,  
    // 0x88-8F  Reserved
    BJ_KEY_NUMLOCK             = 0x90,  
    BJ_KEY_SCROLL              = 0x91,  
    // 0x92-96  OEM specific
    // 0x97-9F  Unassigned
    BJ_KEY_LSHIFT              = 0xA0,  
    BJ_KEY_RSHIFT              = 0xA1,  
    BJ_KEY_LCONTROL            = 0xA2,  
    BJ_KEY_RCONTROL            = 0xA3,  
    BJ_KEY_LMENU               = 0xA4,  
    BJ_KEY_RMENU               = 0xA5,  
    BJ_KEY_BROWSER_BACK        = 0xA6,  
    BJ_KEY_BROWSER_FORWARD     = 0xA7,  
    BJ_KEY_BROWSER_REFRESH     = 0xA8,  
    BJ_KEY_BROWSER_STOP        = 0xA9,  
    BJ_KEY_BROWSER_SEARCH      = 0xAA,  
    BJ_KEY_BROWSER_FAVORITES   = 0xAB,  
    BJ_KEY_BROWSER_HOME        = 0xAC,  
    BJ_KEY_VOLUME_MUTE         = 0xAD,  
    BJ_KEY_VOLUME_DOWN         = 0xAE,  
    BJ_KEY_VOLUME_UP           = 0xAF,  
    BJ_KEY_MEDIA_NEXT_TRACK    = 0xB0,  
    BJ_KEY_MEDIA_PREV_TRACK    = 0xB1,  
    BJ_KEY_MEDIA_STOP          = 0xB2,  
    BJ_KEY_MEDIA_PLAY_PAUSE    = 0xB3,  
    BJ_KEY_LAUNCH_MAIL         = 0xB4,  
    BJ_KEY_LAUNCH_MEDIA_SELECT = 0xB5,  
    BJ_KEY_LAUNCH_APP1         = 0xB6,  
    BJ_KEY_LAUNCH_APP2         = 0xB7,  
    // 0xB8-B9  Reserved
    BJ_KEY_OEM_1               = 0xBA,  
    BJ_KEY_OEM_PLUS            = 0xBB,  
    BJ_KEY_OEM_COMMA           = 0xBC,  
    BJ_KEY_OEM_MINUS           = 0xBD,  
    BJ_KEY_OEM_PERIOD          = 0xBE,  
    BJ_KEY_OEM_2               = 0xBF,  
    BJ_KEY_OEM_3               = 0xC0,  
    // 0xC1-DA  Reserved
    BJ_KEY_OEM_4               = 0xDB,  
    BJ_KEY_OEM_5               = 0xDC,  
    BJ_KEY_OEM_6               = 0xDD,  
    BJ_KEY_OEM_7               = 0xDE,  
    BJ_KEY_OEM_8               = 0xDF,  
    // 0xE0     Reserved
    // 0xE1     OEM specific
    BJ_KEY_OEM_102             = 0xE2,  
    // 0xE3-E4  OEM specific
    BJ_KEY_PROCESSKEY          = 0xE5,  
    // 0xE6     OEM specific
    BJ_KEY_PACKET              = 0xE7,  
    // 0xE8     Unassigned
    // 0xE9-F5  OEM specific
    BJ_KEY_ATTN                = 0xF6,  
    BJ_KEY_CRSEL               = 0xF7,  
    BJ_KEY_EXSEL               = 0xF8,  
    BJ_KEY_EREOF               = 0xF9,  
    BJ_KEY_PLAY                = 0xFA,  
    BJ_KEY_ZOOM                = 0xFB,  
    BJ_KEY_NONAME              = 0xFC,  
    BJ_KEY_PA1                 = 0xFD,  
    BJ_KEY_OEM_CLEAR           = 0xFE,  
};
#ifndef BJ_NO_TYPEDEF
typedef enum bj_key bj_key;
#endif
 
// Some Keycode aliases
#define BJ_KEY_APOSTROPHE    BJ_KEY_OEM_7      
#define BJ_KEY_BACKSLASH     BJ_KEY_OEM_5      
#define BJ_KEY_BACKSPACE     BJ_KEY_BACK       
#define BJ_KEY_CAPSLOCK      BJ_KEY_CAPITAL    
#define BJ_KEY_COMMA         BJ_KEY_OEM_COMMA  
#define BJ_KEY_ENTER         BJ_KEY_RETURN     
#define BJ_KEY_GRAVE_ACCENT  BJ_KEY_OEM_3      
#define BJ_KEY_HANGUL        BJ_KEY_KANA       
#define BJ_KEY_HANJA         BJ_KEY_KANJI      
#define BJ_KEY_LEFT_ALT      BJ_KEY_LMENU      
#define BJ_KEY_LEFT_BRACKET  BJ_KEY_OEM_4      
#define BJ_KEY_LEFT_CONTROL  BJ_KEY_LCONTROL   
#define BJ_KEY_LEFT_OS       BJ_KEY_LWIN       
#define BJ_KEY_LEFT_SHIT     BJ_KEY_LSHIFT     
#define BJ_KEY_MINUS         BJ_KEY_OEM_MINUS  
#define BJ_KEY_PAGE_DOWN     BJ_KEY_NEXT       
#define BJ_KEY_PAGE_UP       BJ_KEY_PRIOR      
#define BJ_KEY_PERIOD        BJ_KEY_OEM_PERIOD 
#define BJ_KEY_PLUS          BJ_KEY_OEM_PLUS   
#define BJ_KEY_PRINT_SCREEN  BJ_KEY_SNAPSHOT   
#define BJ_KEY_RIGHT_ALT     BJ_KEY_RMENU      
#define BJ_KEY_RIGHT_BRACKET BJ_KEY_OEM_6      
#define BJ_KEY_RIGHT_CONTROL BJ_KEY_RCONTROL   
#define BJ_KEY_RIGHT_OS      BJ_KEY_RWIN       
#define BJ_KEY_RIGHT_SHIFT   BJ_KEY_RSHIFT     
#define BJ_KEY_SEMICOLON     BJ_KEY_OEM_1      
#define BJ_KEY_SLASH         BJ_KEY_OEM_2      

BANJO_EXPORT const char* bj_key_name(int key);

enum bj_event_action {
    BJ_RELEASE, 
    BJ_PRESS,   
    BJ_REPEAT,  
};
#ifndef BJ_NO_TYPEDEF
typedef enum bj_event_action bj_event_action;
#endif

struct bj_enter_event {
    int     x;     
    int     y;     
    bj_bool enter; 
};

struct bj_cursor_event {
    int x; 
    int y; 
};

struct bj_button_event {
    int             x;       
    int             y;       
    enum bj_event_action action; 
    int             button; 
};

struct bj_key_event {
    enum bj_key          key;      
    int             scancode; 
    enum bj_event_action action;   
};

enum bj_event_type {
    BJ_EVENT_ENTER,  
    BJ_EVENT_CURSOR, 
    BJ_EVENT_KEY,    
    BJ_EVENT_BUTTON, 
};
#ifndef BJ_NO_TYPEDEF
typedef enum bj_event_type bj_event_type;
#endif

struct bj_event {
    struct bj_window*     window; 
    enum bj_event_type  type;   
    union {
        struct bj_key_event    key;    
        struct bj_button_event button; 
        struct bj_cursor_event cursor; 
        struct bj_enter_event  enter;  
    } as;
};

typedef void(* bj_enter_callback_fn)(struct bj_window* window, const struct bj_enter_event* event, void* user_data);

typedef void(* bj_cursor_callback_fn)(struct bj_window* window, const struct bj_cursor_event* event, void* user_data);

typedef void(* bj_button_callback_fn)(struct bj_window* window, const struct bj_button_event* event, void* user_data);

typedef void(* bj_key_callback_fn)(struct bj_window* window, const struct bj_key_event* event, void* user_data);

BANJO_EXPORT bj_cursor_callback_fn bj_set_cursor_callback(
    bj_cursor_callback_fn callback,
    void*                   user_data
);

BANJO_EXPORT bj_button_callback_fn bj_set_button_callback(
    bj_button_callback_fn callback,
    void*                   user_data
);

BANJO_EXPORT bj_key_callback_fn bj_set_key_callback(
    bj_key_callback_fn callback,
    void*                user_data
);

BANJO_EXPORT bj_enter_callback_fn bj_set_enter_callback(
    bj_enter_callback_fn callback,
    void*                  user_data
);

BANJO_EXPORT void bj_close_on_escape(
    struct bj_window*           window,
    const struct bj_key_event*  event,
    void*                user_data
);

void bj_push_event(const struct bj_event* e);

void bj_push_key_event(struct bj_window* window, enum bj_event_action action, enum bj_key key, int scancode);

void bj_push_cursor_event(struct bj_window* window, int x, int y);

void bj_push_button_event(struct bj_window* window, int button, enum bj_event_action action, int x, int y);

void bj_push_enter_event(struct bj_window* window, bj_bool enter, int x, int y);

BANJO_EXPORT void bj_dispatch_events(void);

BANJO_EXPORT bj_bool bj_poll_events(
    struct bj_event* event
);

BANJO_EXPORT void bj_dispatch_event(
    const struct bj_event* event
);
 
 
#endif