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Added a new hint SDL_HINT_APPLE_TV_REMOTE_ALLOW_ROTATION. 

When set to "1", the orientation of the Apple TV remote affects the axes of the corresponding SDL joystick. It is "0" (disabled) by default.
This commit is contained in:
Alex Szpakowski 2016-09-17 01:31:07 -03:00
parent 4bcce330d1
commit a96b6f2104
2 changed files with 40 additions and 0 deletions
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10
include/SDL_hints.h
View File

@ -295,6 +295,16 @@ extern "C" {
*/
#define SDL_HINT_APPLE_TV_CONTROLLER_UI_EVENTS "SDL_APPLE_TV_CONTROLLER_UI_EVENTS"
/**
* \brief A variable controlling whether the Apple TV remote's joystick axes
* will automatically match the rotation of the remote.
*
* This variable can be set to the following values:
* "0" - Remote orientation does not affect joystick axes (the default).
* "1" - Joystick axes are based on the orientation of the remote.
*/
#define SDL_HINT_APPLE_TV_REMOTE_ALLOW_ROTATION "SDL_APPLE_TV_REMOTE_ALLOW_ROTATION"
/**
* \brief A variable controlling whether the Android / iOS built-in
* accelerometer should be listed as a joystick device, rather than listing

30
src/joystick/iphoneos/SDL_sysjoystick.m
View File

@ -127,9 +127,13 @@ SDL_SYS_AddMFIJoystickDevice(SDL_JoystickDeviceItem *device, GCController *contr
}
#if TARGET_OS_TV
else if (controller.microGamepad) {
const char *hint = SDL_GetHint(SDL_HINT_APPLE_TV_REMOTE_ALLOW_ROTATION);
device->naxes = 2; /* treat the touch surface as two axes */
device->nhats = 0; /* apparently the touch surface-as-dpad is buggy */
device->nbuttons = 3; /* AX, pause button */
controller.microGamepad.allowsRotation = (hint != NULL && *hint != '0');
}
#endif /* TARGET_OS_TV */
@ -248,6 +252,22 @@ SDL_SYS_RemoveJoystickDevice(SDL_JoystickDeviceItem *device)
return next;
}
#if TARGET_OS_TV
static void
SDL_AppleTVRemoteRotationHintChanged(void *udata, const char *name, const char *oldValue, const char *newValue)
{
BOOL allowRotation = newValue != NULL && *newValue != '0';
@autoreleasepool {
for (GCController *controller in [GCController controllers]) {
if (controller.microGamepad) {
controller.microGamepad.allowsRotation = allowRotation;
}
}
}
}
#endif /* TARGET_OS_TV */
/* Function to scan the system for joysticks.
* Joystick 0 should be the system default joystick.
* It should return 0, or -1 on an unrecoverable fatal error.
@ -276,6 +296,11 @@ SDL_SYS_JoystickInit(void)
SDL_SYS_AddJoystickDevice(controller, SDL_FALSE);
}
#if TARGET_OS_TV
SDL_AddHintCallback(SDL_HINT_APPLE_TV_REMOTE_ALLOW_ROTATION,
SDL_AppleTVRemoteRotationHintChanged, NULL);
#endif /* TARGET_OS_TV */
connectObserver = [center addObserverForName:GCControllerDidConnectNotification
object:nil
queue:nil
@ -656,6 +681,11 @@ SDL_SYS_JoystickQuit(void)
[center removeObserver:disconnectObserver name:GCControllerDidDisconnectNotification object:nil];
disconnectObserver = nil;
}
#if TARGET_OS_TV
SDL_DelHintCallback(SDL_HINT_APPLE_TV_REMOTE_ALLOW_ROTATION,
SDL_AppleTVRemoteRotationHintChanged, NULL);
#endif /* TARGET_OS_TV */
#endif /* SDL_JOYSTICK_MFI */
while (deviceList != NULL) {