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Just the sysjoystick file for the iPhone accelerometer. It doesn't re…

…veal anything under NDA, but I just wanted to make sure that adding files to the repository is working under XCode right now.
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Holmes Futrell committed Jul 11, 2008
1 parent 64fb25e commit b7a5e730b161f9bef8e996bf07e72042d250b805
Showing with 125 additions and 0 deletions.
  1. +125 −0 src/joystick/iphoneos/SDL_sysjoystick.m
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SDL - Simple DirectMedia Layer
Copyright (C) 1997-2006 Sam Lantinga
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with this library; if not, write to the Free Software
Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
Sam Lantinga
#include "SDL_config.h"

/* This is the system specific header for the SDL joystick API */

#include "SDL_joystick.h"
#include "../SDL_sysjoystick.h"
#include "../SDL_joystick_c.h"
#import "SDLUIAccelerationDelegate.h"

const char *accelerometerName = "iPhone accelerometer";

/* Function to scan the system for joysticks.
* This function should set SDL_numjoysticks to the number of available
* joysticks. Joystick 0 should be the system default joystick.
* It should return 0, or -1 on an unrecoverable fatal error.
SDL_numjoysticks = 1;
return (1);

/* Function to get the device-dependent name of a joystick */
const char *
SDL_SYS_JoystickName(int index)
switch(index) {
case 0:
return accelerometerName;
SDL_SetError("No joystick available with that index");
return NULL;

/* Function to open a joystick for use.
The joystick to open is specified by the index field of the joystick.
This should fill the nbuttons and naxes fields of the joystick structure.
It returns 0, or -1 if there is an error.
SDL_SYS_JoystickOpen(SDL_Joystick * joystick)
if (joystick->index == 0) {
joystick->naxes = 3;
joystick->nhats = 0;
joystick->nballs = 0;
joystick->nbuttons = 0;
joystick->name = accelerometerName;
[[SDLUIAccelerationDelegate sharedDelegate] startup];
return 0;
else {
SDL_SetError("No joystick available with that index");
return (-1);


/* Function to update the state of a joystick - called as a device poll.
* This function shouldn't update the joystick structure directly,
* but instead should call SDL_PrivateJoystick*() to deliver events
* and update joystick device state.
SDL_SYS_JoystickUpdate(SDL_Joystick * joystick)

Sint16 orientation[3];
[[SDLUIAccelerationDelegate sharedDelegate] getLastOrientation: orientation];

if ([[SDLUIAccelerationDelegate sharedDelegate] hasNewData]) {

[[SDLUIAccelerationDelegate sharedDelegate] setHasNewData: NO];

SDL_PrivateJoystickAxis(joystick, 0, orientation[0]);
SDL_PrivateJoystickAxis(joystick, 1, orientation[1]);
SDL_PrivateJoystickAxis(joystick, 2, orientation[2]);



/* Function to close a joystick after use */
SDL_SYS_JoystickClose(SDL_Joystick * joystick)
if (joystick->index == 0 && [[SDLUIAccelerationDelegate sharedDelegate] isRunning]) {
[[SDLUIAccelerationDelegate sharedDelegate] shutdown];
SDL_SetError("No joystick open with that index");


/* Function to perform any system-specific joystick related cleanup */
/* vi: set ts=4 sw=4 expandtab: */

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