Add a function to watch a particular hint.
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") {
printf("Hi %s\n", static_cast<char*>(f_name));
}
}
...
SDL_SetHint(SDL_HINT_XINPUT_ENABLED, "0");
...
SDL_Init(SDL_INIT_EVERYTHING);
...
while(SDL_PollEvent(&event) != 0)
{
// You can change hint here
}
...
SDL_AddHintCallback(SDL_HINT_XINPUT_ENABLED, callback, const_cast<char*>("SDL"));