event.h

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#pragma once
 
#include "defines.h"
 
typedef struct event_context {
    // 128 bytes
    union {
        i64 i64[2];
        u64 u64[2];
 
        f64 f64[2];
 
        i32 i32[4];
        u32 u32[4];
        f32 f32[4];
 
        i16 i16[8];
 
        u16 u16[8];
 
        i8 i8[16];
        u8 u8[16];
 
        char c[16];
    } data;
} event_context;
 
typedef b8 (*PFN_on_event)(u16 code, void* sender, void* listener_inst, event_context data);
 
b8 event_system_initialize(u64* memory_requirement, void* state, void* config);
 
void event_system_shutdown(void* state);
 
KAPI b8 event_register(u16 code, void* listener, PFN_on_event on_event);
 
KAPI b8 event_unregister(u16 code, void* listener, PFN_on_event on_event);
 
KAPI b8 event_fire(u16 code, void* sender, event_context context);
 
typedef enum system_event_code {
    EVENT_CODE_APPLICATION_QUIT = 0x01,
 
    EVENT_CODE_KEY_PRESSED = 0x02,
 
    EVENT_CODE_KEY_RELEASED = 0x03,
 
    EVENT_CODE_BUTTON_PRESSED = 0x04,
 
    EVENT_CODE_BUTTON_RELEASED = 0x05,
 
    EVENT_CODE_MOUSE_MOVED = 0x06,
 
    EVENT_CODE_MOUSE_WHEEL = 0x07,
 
    EVENT_CODE_RESIZED = 0x08,
 
    // Change the render mode for debugging purposes.
    /* Context usage:
     * i32 mode = context.data.i32[0];
     */
    EVENT_CODE_SET_RENDER_MODE = 0x0A,
 
    EVENT_CODE_DEBUG0 = 0x10,
    EVENT_CODE_DEBUG1 = 0x11,
    EVENT_CODE_DEBUG2 = 0x12,
    EVENT_CODE_DEBUG3 = 0x13,
    EVENT_CODE_DEBUG4 = 0x14,
 
    EVENT_CODE_OBJECT_HOVER_ID_CHANGED = 0x15,
 
    EVENT_CODE_DEFAULT_RENDERTARGET_REFRESH_REQUIRED = 0x16,
 
    EVENT_CODE_KVAR_CHANGED = 0x17,
 
    EVENT_CODE_WATCHED_FILE_WRITTEN = 0x18,
 
    EVENT_CODE_WATCHED_FILE_DELETED = 0x19,
 
    EVENT_CODE_MOUSE_DRAGGED = 0x20,
 
    EVENT_CODE_MOUSE_DRAG_BEGIN = 0x21,
 
    EVENT_CODE_MOUSE_DRAG_END = 0x22,
 
    MAX_EVENT_CODE = 0xFF
} system_event_code;