Add a function to watch a particular hint.
Defined in SDL_hints.h
void SDL_AddHintCallback(const char *name,
SDL_HintCallback callback,void *userdata);
name | the hint to watch |
callback | An SDL_HintCallback function that will be called when the hint value changes |
userdata | a pointer to pass to the callback function |
This function is available since SDL 2.0.0.
// Callback function that prints message if new value of hint is 1
void callback(void* f_name, const char* name, const char* oldValue, const char* newValue) {
if (newValue == (const char*)"1") {
"Hi %s\n", (const char *)f_name);
printf(
}
}
/* ... */
"0");
SDL_SetHint(SDL_HINT_XINPUT_ENABLED,
/* ... */
SDL_Init(SDL_INIT_EVERYTHING);
/* ... */
SDL_Event event;while(SDL_PollEvent(&event) != 0)
{// You can change hint here
}
/* ... */
"SDL"); SDL_AddHintCallback(SDL_HINT_XINPUT_ENABLED, callback,
CategoryAPI, CategoryAPIFunction, CategoryHints