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<div class="title">SDL_joystick.h File Reference</div> </div>
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<div class="textblock"><code>#include "<a class="el" href="SDL__stdinc_8h_source.html">SDL_stdinc.h</a>"</code><br />
<code>#include "<a class="el" href="SDL__error_8h_source.html">SDL_error.h</a>"</code><br />
<code>#include "<a class="el" href="begin__code_8h_source.html">begin_code.h</a>"</code><br />
<code>#include "<a class="el" href="close__code_8h_source.html">close_code.h</a>"</code><br />
</div>
<p><a href="SDL__joystick_8h_source.html">Go to the source code of this file.</a></p>
<table class="memberdecls">
<tr class="heading"><td colspan="2"><h2 class="groupheader"><a name="nested-classes"></a>
Classes</h2></td></tr>
<tr class="memitem:"><td class="memItemLeft" align="right" valign="top">struct  </td><td class="memItemRight" valign="bottom"><a class="el" href="structSDL__JoystickGUID.html">SDL_JoystickGUID</a></td></tr>
<tr class="separator:"><td class="memSeparator" colspan="2"> </td></tr>
</table><table class="memberdecls">
<tr class="heading"><td colspan="2"><h2 class="groupheader"><a name="define-members"></a>
Macros</h2></td></tr>
<tr><td colspan="2"><div class="groupHeader">Hat positions</div></td></tr>
<tr class="memitem:adbfd6f0bad25cd1bb79f8c0a065f3833"><td class="memItemLeft" align="right" valign="top"><a class="anchor" id="adbfd6f0bad25cd1bb79f8c0a065f3833"></a>
#define </td><td class="memItemRight" valign="bottom"><b>SDL_HAT_CENTERED</b>   0x00</td></tr>
<tr class="separator:adbfd6f0bad25cd1bb79f8c0a065f3833"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:ac916fe96c0740790e5496e12c67d8889"><td class="memItemLeft" align="right" valign="top"><a class="anchor" id="ac916fe96c0740790e5496e12c67d8889"></a>
#define </td><td class="memItemRight" valign="bottom"><b>SDL_HAT_UP</b>   0x01</td></tr>
<tr class="separator:ac916fe96c0740790e5496e12c67d8889"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:a5d1844afaf2ceaf58c689a8bd480a543"><td class="memItemLeft" align="right" valign="top"><a class="anchor" id="a5d1844afaf2ceaf58c689a8bd480a543"></a>
#define </td><td class="memItemRight" valign="bottom"><b>SDL_HAT_RIGHT</b>   0x02</td></tr>
<tr class="separator:a5d1844afaf2ceaf58c689a8bd480a543"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:aa87f7a91d6bae8b420b133559d983338"><td class="memItemLeft" align="right" valign="top"><a class="anchor" id="aa87f7a91d6bae8b420b133559d983338"></a>
#define </td><td class="memItemRight" valign="bottom"><b>SDL_HAT_DOWN</b>   0x04</td></tr>
<tr class="separator:aa87f7a91d6bae8b420b133559d983338"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:a4666c12cae25d8bab053d8569396cd77"><td class="memItemLeft" align="right" valign="top"><a class="anchor" id="a4666c12cae25d8bab053d8569396cd77"></a>
#define </td><td class="memItemRight" valign="bottom"><b>SDL_HAT_LEFT</b>   0x08</td></tr>
<tr class="separator:a4666c12cae25d8bab053d8569396cd77"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:a65fde978b4ab9c269c215d1922ae7755"><td class="memItemLeft" align="right" valign="top"><a class="anchor" id="a65fde978b4ab9c269c215d1922ae7755"></a>
#define </td><td class="memItemRight" valign="bottom"><b>SDL_HAT_RIGHTUP</b>   (SDL_HAT_RIGHT|SDL_HAT_UP)</td></tr>
<tr class="separator:a65fde978b4ab9c269c215d1922ae7755"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:abf50339da11ca12699ee2199607d275f"><td class="memItemLeft" align="right" valign="top"><a class="anchor" id="abf50339da11ca12699ee2199607d275f"></a>
#define </td><td class="memItemRight" valign="bottom"><b>SDL_HAT_RIGHTDOWN</b>   (SDL_HAT_RIGHT|SDL_HAT_DOWN)</td></tr>
<tr class="separator:abf50339da11ca12699ee2199607d275f"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:a6d7988b43c09ced08ec318a2556f1858"><td class="memItemLeft" align="right" valign="top"><a class="anchor" id="a6d7988b43c09ced08ec318a2556f1858"></a>
#define </td><td class="memItemRight" valign="bottom"><b>SDL_HAT_LEFTUP</b>   (SDL_HAT_LEFT|SDL_HAT_UP)</td></tr>
<tr class="separator:a6d7988b43c09ced08ec318a2556f1858"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:a3fa8609d382a0f74507890491033c784"><td class="memItemLeft" align="right" valign="top"><a class="anchor" id="a3fa8609d382a0f74507890491033c784"></a>
#define </td><td class="memItemRight" valign="bottom"><b>SDL_HAT_LEFTDOWN</b>   (SDL_HAT_LEFT|SDL_HAT_DOWN)</td></tr>
<tr class="separator:a3fa8609d382a0f74507890491033c784"><td class="memSeparator" colspan="2"> </td></tr>
</table><table class="memberdecls">
<tr class="heading"><td colspan="2"><h2 class="groupheader"><a name="typedef-members"></a>
Typedefs</h2></td></tr>
<tr class="memitem:a1246a982e91df301042a77e65c694987"><td class="memItemLeft" align="right" valign="top"><a class="anchor" id="a1246a982e91df301042a77e65c694987"></a>
typedef struct _SDL_Joystick </td><td class="memItemRight" valign="bottom"><b>SDL_Joystick</b></td></tr>
<tr class="separator:a1246a982e91df301042a77e65c694987"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:a3c3d32500cb08f76ee8077983912c0bd"><td class="memItemLeft" align="right" valign="top"><a class="anchor" id="a3c3d32500cb08f76ee8077983912c0bd"></a>
typedef <a class="el" href="SDL__stdinc_8h.html#a7a90b941db9d4582e9ad7abb9940ff7e">Sint32</a> </td><td class="memItemRight" valign="bottom"><b>SDL_JoystickID</b></td></tr>
<tr class="separator:a3c3d32500cb08f76ee8077983912c0bd"><td class="memSeparator" colspan="2"> </td></tr>
</table><table class="memberdecls">
<tr class="heading"><td colspan="2"><h2 class="groupheader"><a name="func-members"></a>
Functions</h2></td></tr>
<tr class="memitem:a2ab130eaa28f8e3bd544a5432041a311"><td class="memItemLeft" align="right" valign="top">DECLSPEC <a class="el" href="SDL__thread_8h.html#a6a64f9be4433e4de6e2f2f548cf3c08e">int</a> SDLCALL </td><td class="memItemRight" valign="bottom"><a class="el" href="SDL__joystick_8h.html#a2ab130eaa28f8e3bd544a5432041a311">SDL_NumJoysticks</a> (<a class="el" href="SDL__audio_8h.html#a52835ae37c4bb905b903cbaf5d04b05f">void</a>)</td></tr>
<tr class="separator:a2ab130eaa28f8e3bd544a5432041a311"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:ad36c04c086f834fe09a97e4cf86a5a59"><td class="memItemLeft" align="right" valign="top">DECLSPEC const char *SDLCALL </td><td class="memItemRight" valign="bottom"><a class="el" href="SDL__joystick_8h.html#ad36c04c086f834fe09a97e4cf86a5a59">SDL_JoystickNameForIndex</a> (<a class="el" href="SDL__thread_8h.html#a6a64f9be4433e4de6e2f2f548cf3c08e">int</a> device_index)</td></tr>
<tr class="separator:ad36c04c086f834fe09a97e4cf86a5a59"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:a5b6f6554bca2659e149b5bc0fa538899"><td class="memItemLeft" align="right" valign="top">DECLSPEC SDL_Joystick *SDLCALL </td><td class="memItemRight" valign="bottom"><a class="el" href="SDL__joystick_8h.html#a5b6f6554bca2659e149b5bc0fa538899">SDL_JoystickOpen</a> (<a class="el" href="SDL__thread_8h.html#a6a64f9be4433e4de6e2f2f548cf3c08e">int</a> device_index)</td></tr>
<tr class="separator:a5b6f6554bca2659e149b5bc0fa538899"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:ad3ab02961bc45606e8f5f937c934160c"><td class="memItemLeft" align="right" valign="top">DECLSPEC const char *SDLCALL </td><td class="memItemRight" valign="bottom"><a class="el" href="SDL__joystick_8h.html#ad3ab02961bc45606e8f5f937c934160c">SDL_JoystickName</a> (SDL_Joystick *joystick)</td></tr>
<tr class="separator:ad3ab02961bc45606e8f5f937c934160c"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:afdbf5289ff5452afb1bd869ffcf250b5"><td class="memItemLeft" align="right" valign="top">DECLSPEC <a class="el" href="structSDL__JoystickGUID.html">SDL_JoystickGUID</a> SDLCALL </td><td class="memItemRight" valign="bottom"><a class="el" href="SDL__joystick_8h.html#afdbf5289ff5452afb1bd869ffcf250b5">SDL_JoystickGetDeviceGUID</a> (<a class="el" href="SDL__thread_8h.html#a6a64f9be4433e4de6e2f2f548cf3c08e">int</a> device_index)</td></tr>
<tr class="separator:afdbf5289ff5452afb1bd869ffcf250b5"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:acc85c770af41eae76948e11c678f92ca"><td class="memItemLeft" align="right" valign="top">DECLSPEC <a class="el" href="structSDL__JoystickGUID.html">SDL_JoystickGUID</a> SDLCALL </td><td class="memItemRight" valign="bottom"><a class="el" href="SDL__joystick_8h.html#acc85c770af41eae76948e11c678f92ca">SDL_JoystickGetGUID</a> (SDL_Joystick *joystick)</td></tr>
<tr class="separator:acc85c770af41eae76948e11c678f92ca"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:a7f615ef8040e7e9de3af6482d8d9908c"><td class="memItemLeft" align="right" valign="top">DECLSPEC <a class="el" href="SDL__audio_8h.html#a52835ae37c4bb905b903cbaf5d04b05f">void</a> SDLCALL </td><td class="memItemRight" valign="bottom"><a class="el" href="SDL__joystick_8h.html#a7f615ef8040e7e9de3af6482d8d9908c">SDL_JoystickGetGUIDString</a> (<a class="el" href="structSDL__JoystickGUID.html">SDL_JoystickGUID</a> guid, char *pszGUID, <a class="el" href="SDL__thread_8h.html#a6a64f9be4433e4de6e2f2f548cf3c08e">int</a> cbGUID)</td></tr>
<tr class="separator:a7f615ef8040e7e9de3af6482d8d9908c"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:aef9d131a6a6838847731cf8094944b46"><td class="memItemLeft" align="right" valign="top">DECLSPEC <a class="el" href="structSDL__JoystickGUID.html">SDL_JoystickGUID</a> SDLCALL </td><td class="memItemRight" valign="bottom"><a class="el" href="SDL__joystick_8h.html#aef9d131a6a6838847731cf8094944b46">SDL_JoystickGetGUIDFromString</a> (const char *pchGUID)</td></tr>
<tr class="separator:aef9d131a6a6838847731cf8094944b46"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:a222cd2d664acbea2dad78b891df4b89a"><td class="memItemLeft" align="right" valign="top">DECLSPEC SDL_bool SDLCALL </td><td class="memItemRight" valign="bottom"><a class="el" href="SDL__joystick_8h.html#a222cd2d664acbea2dad78b891df4b89a">SDL_JoystickGetAttached</a> (SDL_Joystick *joystick)</td></tr>
<tr class="separator:a222cd2d664acbea2dad78b891df4b89a"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:ab38dfc6428e15c2476478418075d4c83"><td class="memItemLeft" align="right" valign="top">DECLSPEC SDL_JoystickID SDLCALL </td><td class="memItemRight" valign="bottom"><a class="el" href="SDL__joystick_8h.html#ab38dfc6428e15c2476478418075d4c83">SDL_JoystickInstanceID</a> (SDL_Joystick *joystick)</td></tr>
<tr class="separator:ab38dfc6428e15c2476478418075d4c83"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:a865c2e087fe69a3a30c87243729ecdea"><td class="memItemLeft" align="right" valign="top">DECLSPEC <a class="el" href="SDL__thread_8h.html#a6a64f9be4433e4de6e2f2f548cf3c08e">int</a> SDLCALL </td><td class="memItemRight" valign="bottom"><a class="el" href="SDL__joystick_8h.html#a865c2e087fe69a3a30c87243729ecdea">SDL_JoystickNumAxes</a> (SDL_Joystick *joystick)</td></tr>
<tr class="separator:a865c2e087fe69a3a30c87243729ecdea"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:a755d087bb16270087bfced7501656a6d"><td class="memItemLeft" align="right" valign="top">DECLSPEC <a class="el" href="SDL__thread_8h.html#a6a64f9be4433e4de6e2f2f548cf3c08e">int</a> SDLCALL </td><td class="memItemRight" valign="bottom"><a class="el" href="SDL__joystick_8h.html#a755d087bb16270087bfced7501656a6d">SDL_JoystickNumBalls</a> (SDL_Joystick *joystick)</td></tr>
<tr class="separator:a755d087bb16270087bfced7501656a6d"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:aa62ea91c7c4ca2d12804a9fb3760e448"><td class="memItemLeft" align="right" valign="top">DECLSPEC <a class="el" href="SDL__thread_8h.html#a6a64f9be4433e4de6e2f2f548cf3c08e">int</a> SDLCALL </td><td class="memItemRight" valign="bottom"><a class="el" href="SDL__joystick_8h.html#aa62ea91c7c4ca2d12804a9fb3760e448">SDL_JoystickNumHats</a> (SDL_Joystick *joystick)</td></tr>
<tr class="separator:aa62ea91c7c4ca2d12804a9fb3760e448"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:adfc662e571011ae7ec303101ab34e53a"><td class="memItemLeft" align="right" valign="top">DECLSPEC <a class="el" href="SDL__thread_8h.html#a6a64f9be4433e4de6e2f2f548cf3c08e">int</a> SDLCALL </td><td class="memItemRight" valign="bottom"><a class="el" href="SDL__joystick_8h.html#adfc662e571011ae7ec303101ab34e53a">SDL_JoystickNumButtons</a> (SDL_Joystick *joystick)</td></tr>
<tr class="separator:adfc662e571011ae7ec303101ab34e53a"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:a3ea23a9504ea56f2778147dbf39a029f"><td class="memItemLeft" align="right" valign="top">DECLSPEC <a class="el" href="SDL__audio_8h.html#a52835ae37c4bb905b903cbaf5d04b05f">void</a> SDLCALL </td><td class="memItemRight" valign="bottom"><a class="el" href="SDL__joystick_8h.html#a3ea23a9504ea56f2778147dbf39a029f">SDL_JoystickUpdate</a> (<a class="el" href="SDL__audio_8h.html#a52835ae37c4bb905b903cbaf5d04b05f">void</a>)</td></tr>
<tr class="separator:a3ea23a9504ea56f2778147dbf39a029f"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:a51ba353843fd4477f6a485ac4ef35d00"><td class="memItemLeft" align="right" valign="top">DECLSPEC <a class="el" href="SDL__thread_8h.html#a6a64f9be4433e4de6e2f2f548cf3c08e">int</a> SDLCALL </td><td class="memItemRight" valign="bottom"><a class="el" href="SDL__joystick_8h.html#a51ba353843fd4477f6a485ac4ef35d00">SDL_JoystickEventState</a> (<a class="el" href="SDL__thread_8h.html#a6a64f9be4433e4de6e2f2f548cf3c08e">int</a> state)</td></tr>
<tr class="separator:a51ba353843fd4477f6a485ac4ef35d00"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:ac6fbda13b93679bedfc34733d4b2e748"><td class="memItemLeft" align="right" valign="top">DECLSPEC <a class="el" href="SDL__stdinc_8h.html#a9d0257032c0e146ab6121bf0122712f5">Sint16</a> SDLCALL </td><td class="memItemRight" valign="bottom"><a class="el" href="SDL__joystick_8h.html#ac6fbda13b93679bedfc34733d4b2e748">SDL_JoystickGetAxis</a> (SDL_Joystick *joystick, <a class="el" href="SDL__thread_8h.html#a6a64f9be4433e4de6e2f2f548cf3c08e">int</a> axis)</td></tr>
<tr class="separator:ac6fbda13b93679bedfc34733d4b2e748"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:a2215030cf283295569fee41fd0251e01"><td class="memItemLeft" align="right" valign="top">DECLSPEC <a class="el" href="SDL__stdinc_8h.html#a2944638813a090aa23e62f4da842c3e2">Uint8</a> SDLCALL </td><td class="memItemRight" valign="bottom"><a class="el" href="SDL__joystick_8h.html#a2215030cf283295569fee41fd0251e01">SDL_JoystickGetHat</a> (SDL_Joystick *joystick, <a class="el" href="SDL__thread_8h.html#a6a64f9be4433e4de6e2f2f548cf3c08e">int</a> hat)</td></tr>
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<tr class="memitem:ac7a5a4c17f6a5a4ef9f5bc78e50913df"><td class="memItemLeft" align="right" valign="top">DECLSPEC <a class="el" href="SDL__thread_8h.html#a6a64f9be4433e4de6e2f2f548cf3c08e">int</a> SDLCALL </td><td class="memItemRight" valign="bottom"><a class="el" href="SDL__joystick_8h.html#ac7a5a4c17f6a5a4ef9f5bc78e50913df">SDL_JoystickGetBall</a> (SDL_Joystick *joystick, <a class="el" href="SDL__thread_8h.html#a6a64f9be4433e4de6e2f2f548cf3c08e">int</a> ball, <a class="el" href="SDL__thread_8h.html#a6a64f9be4433e4de6e2f2f548cf3c08e">int</a> *dx, <a class="el" href="SDL__thread_8h.html#a6a64f9be4433e4de6e2f2f548cf3c08e">int</a> *dy)</td></tr>
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<tr class="memitem:aaf7789eb03bc42525691e075e2a36131"><td class="memItemLeft" align="right" valign="top">DECLSPEC <a class="el" href="SDL__stdinc_8h.html#a2944638813a090aa23e62f4da842c3e2">Uint8</a> SDLCALL </td><td class="memItemRight" valign="bottom"><a class="el" href="SDL__joystick_8h.html#aaf7789eb03bc42525691e075e2a36131">SDL_JoystickGetButton</a> (SDL_Joystick *joystick, <a class="el" href="SDL__thread_8h.html#a6a64f9be4433e4de6e2f2f548cf3c08e">int</a> button)</td></tr>
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<a name="details" id="details"></a><h2 class="groupheader">Detailed Description</h2>
<div class="textblock"><p>Include file for SDL joystick event handling</p>
<p>The term "device_index" identifies currently plugged in joystick devices between 0 and SDL_NumJoysticks, with the exact joystick behind a device_index changing as joysticks are plugged and unplugged.</p>
<p>The term "instance_id" is the current instantiation of a joystick device in the system, if the joystick is removed and then re-inserted then it will get a new instance_id, instance_id's are monotonically increasing identifiers of a joystick plugged in.</p>
<p>The term JoystickGUID is a stable 128-bit identifier for a joystick device that does not change over time, it identifies class of the device (a X360 wired controller for example). This identifier is platform dependent.</p>
<p>In order to use these functions, <a class="el" href="SDL_8h.html#a8fc8d35348d7c74bad8392d776c937b8">SDL_Init()</a> must have been called with the <a class="el" href="SDL_8h.html#ad6b47d785eaa00d9c48e6c1cff4aef4b">SDL_INIT_JOYSTICK</a> flag. This causes SDL to scan the system for joysticks, and load appropriate drivers.</p>
<p>If you would like to receive joystick updates while the application is in the background, you should set the following hint before calling <a class="el" href="SDL_8h.html#a8fc8d35348d7c74bad8392d776c937b8">SDL_Init()</a>: SDL_HINT_JOYSTICK_ALLOW_BACKGROUND_EVENTS </p>
</div><h2 class="groupheader">Function Documentation</h2>
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<td class="memname">DECLSPEC <a class="el" href="SDL__audio_8h.html#a52835ae37c4bb905b903cbaf5d04b05f">void</a> SDLCALL SDL_JoystickClose </td>
<td>(</td>
<td class="paramtype">SDL_Joystick * </td>
<td class="paramname"><em>joystick</em></td><td>)</td>
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<p>Close a joystick previously opened with <a class="el" href="SDL__joystick_8h.html#a5b6f6554bca2659e149b5bc0fa538899">SDL_JoystickOpen()</a>. </p>
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<td class="memname">DECLSPEC <a class="el" href="SDL__thread_8h.html#a6a64f9be4433e4de6e2f2f548cf3c08e">int</a> SDLCALL SDL_JoystickEventState </td>
<td>(</td>
<td class="paramtype"><a class="el" href="SDL__thread_8h.html#a6a64f9be4433e4de6e2f2f548cf3c08e">int</a> </td>
<td class="paramname"><em>state</em></td><td>)</td>
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<p>Enable/disable joystick event polling.</p>
<p>If joystick events are disabled, you must call <a class="el" href="SDL__joystick_8h.html#a3ea23a9504ea56f2778147dbf39a029f">SDL_JoystickUpdate()</a> yourself and check the state of the joystick when you want joystick information.</p>
<p>The state can be one of ::SDL_QUERY, ::SDL_ENABLE or ::SDL_IGNORE. </p>
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<td class="memname">DECLSPEC SDL_bool SDLCALL SDL_JoystickGetAttached </td>
<td>(</td>
<td class="paramtype">SDL_Joystick * </td>
<td class="paramname"><em>joystick</em></td><td>)</td>
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<p>Returns SDL_TRUE if the joystick has been opened and currently connected, or SDL_FALSE if it has not. </p>
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<td class="memname">DECLSPEC <a class="el" href="SDL__stdinc_8h.html#a9d0257032c0e146ab6121bf0122712f5">Sint16</a> SDLCALL SDL_JoystickGetAxis </td>
<td>(</td>
<td class="paramtype">SDL_Joystick * </td>
<td class="paramname"><em>joystick</em>, </td>
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<td class="paramtype"><a class="el" href="SDL__thread_8h.html#a6a64f9be4433e4de6e2f2f548cf3c08e">int</a> </td>
<td class="paramname"><em>axis</em> </td>
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<p>Get the current state of an axis control on a joystick.</p>
<p>The state is a value ranging from -32768 to 32767.</p>
<p>The axis indices start at index 0. </p>
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<td class="memname">DECLSPEC <a class="el" href="SDL__thread_8h.html#a6a64f9be4433e4de6e2f2f548cf3c08e">int</a> SDLCALL SDL_JoystickGetBall </td>
<td>(</td>
<td class="paramtype">SDL_Joystick * </td>
<td class="paramname"><em>joystick</em>, </td>
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<td class="paramtype"><a class="el" href="SDL__thread_8h.html#a6a64f9be4433e4de6e2f2f548cf3c08e">int</a> </td>
<td class="paramname"><em>ball</em>, </td>
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<td class="paramtype"><a class="el" href="SDL__thread_8h.html#a6a64f9be4433e4de6e2f2f548cf3c08e">int</a> * </td>
<td class="paramname"><em>dx</em>, </td>
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<td class="paramname"><em>dy</em> </td>
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<p>Get the ball axis change since the last poll.</p>
<dl class="section return"><dt>Returns</dt><dd>0, or -1 if you passed it invalid parameters.</dd></dl>
<p>The ball indices start at index 0. </p>
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<td class="memname">DECLSPEC <a class="el" href="SDL__stdinc_8h.html#a2944638813a090aa23e62f4da842c3e2">Uint8</a> SDLCALL SDL_JoystickGetButton </td>
<td>(</td>
<td class="paramtype">SDL_Joystick * </td>
<td class="paramname"><em>joystick</em>, </td>
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<td class="paramname"><em>button</em> </td>
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<p>Get the current state of a button on a joystick.</p>
<p>The button indices start at index 0. </p>
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<td class="memname">DECLSPEC <a class="el" href="structSDL__JoystickGUID.html">SDL_JoystickGUID</a> SDLCALL SDL_JoystickGetDeviceGUID </td>
<td>(</td>
<td class="paramtype"><a class="el" href="SDL__thread_8h.html#a6a64f9be4433e4de6e2f2f548cf3c08e">int</a> </td>
<td class="paramname"><em>device_index</em></td><td>)</td>
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<p>Return the GUID for the joystick at this index </p>
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<td class="memname">DECLSPEC <a class="el" href="structSDL__JoystickGUID.html">SDL_JoystickGUID</a> SDLCALL SDL_JoystickGetGUID </td>
<td>(</td>
<td class="paramtype">SDL_Joystick * </td>
<td class="paramname"><em>joystick</em></td><td>)</td>
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<p>Return the GUID for this opened joystick </p>
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<td class="memname">DECLSPEC <a class="el" href="structSDL__JoystickGUID.html">SDL_JoystickGUID</a> SDLCALL SDL_JoystickGetGUIDFromString </td>
<td>(</td>
<td class="paramtype">const char * </td>
<td class="paramname"><em>pchGUID</em></td><td>)</td>
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<p>convert a string into a joystick formatted guid </p>
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<td class="memname">DECLSPEC <a class="el" href="SDL__audio_8h.html#a52835ae37c4bb905b903cbaf5d04b05f">void</a> SDLCALL SDL_JoystickGetGUIDString </td>
<td>(</td>
<td class="paramtype"><a class="el" href="structSDL__JoystickGUID.html">SDL_JoystickGUID</a> </td>
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<td class="paramtype">char * </td>
<td class="paramname"><em>pszGUID</em>, </td>
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<td class="paramname"><em>cbGUID</em> </td>
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<p>Return a string representation for this guid. pszGUID must point to at least 33 bytes (32 for the string plus a NULL terminator). </p>
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<td class="memname">DECLSPEC <a class="el" href="SDL__stdinc_8h.html#a2944638813a090aa23e62f4da842c3e2">Uint8</a> SDLCALL SDL_JoystickGetHat </td>
<td>(</td>
<td class="paramtype">SDL_Joystick * </td>
<td class="paramname"><em>joystick</em>, </td>
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<td class="paramtype"><a class="el" href="SDL__thread_8h.html#a6a64f9be4433e4de6e2f2f548cf3c08e">int</a> </td>
<td class="paramname"><em>hat</em> </td>
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<p>Get the current state of a POV hat on a joystick.</p>
<p>The hat indices start at index 0.</p>
<dl class="section return"><dt>Returns</dt><dd>The return value is one of the following positions:<ul>
<li>::SDL_HAT_CENTERED</li>
<li>::SDL_HAT_UP</li>
<li>::SDL_HAT_RIGHT</li>
<li>::SDL_HAT_DOWN</li>
<li>::SDL_HAT_LEFT</li>
<li>::SDL_HAT_RIGHTUP</li>
<li>::SDL_HAT_RIGHTDOWN</li>
<li>::SDL_HAT_LEFTUP</li>
<li>::SDL_HAT_LEFTDOWN </li>
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<td class="memname">DECLSPEC SDL_JoystickID SDLCALL SDL_JoystickInstanceID </td>
<td>(</td>
<td class="paramtype">SDL_Joystick * </td>
<td class="paramname"><em>joystick</em></td><td>)</td>
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<p>Get the instance ID of an opened joystick or -1 if the joystick is invalid. </p>
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<td class="memname">DECLSPEC const char* SDLCALL SDL_JoystickName </td>
<td>(</td>
<td class="paramtype">SDL_Joystick * </td>
<td class="paramname"><em>joystick</em></td><td>)</td>
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<p>Return the name for this currently opened joystick. If no name can be found, this function returns NULL. </p>
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<td class="memname">DECLSPEC const char* SDLCALL SDL_JoystickNameForIndex </td>
<td>(</td>
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<td class="paramname"><em>device_index</em></td><td>)</td>
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<p>Get the implementation dependent name of a joystick. This can be called before any joysticks are opened. If no name can be found, this function returns NULL. </p>
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<td class="memname">DECLSPEC <a class="el" href="SDL__thread_8h.html#a6a64f9be4433e4de6e2f2f548cf3c08e">int</a> SDLCALL SDL_JoystickNumAxes </td>
<td>(</td>
<td class="paramtype">SDL_Joystick * </td>
<td class="paramname"><em>joystick</em></td><td>)</td>
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<p>Get the number of general axis controls on a joystick. </p>
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<td class="memname">DECLSPEC <a class="el" href="SDL__thread_8h.html#a6a64f9be4433e4de6e2f2f548cf3c08e">int</a> SDLCALL SDL_JoystickNumBalls </td>
<td>(</td>
<td class="paramtype">SDL_Joystick * </td>
<td class="paramname"><em>joystick</em></td><td>)</td>
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<p>Get the number of trackballs on a joystick.</p>
<p>Joystick trackballs have only relative motion events associated with them and their state cannot be polled. </p>
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<td class="memname">DECLSPEC <a class="el" href="SDL__thread_8h.html#a6a64f9be4433e4de6e2f2f548cf3c08e">int</a> SDLCALL SDL_JoystickNumButtons </td>
<td>(</td>
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<td class="paramname"><em>joystick</em></td><td>)</td>
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<p>Get the number of buttons on a joystick. </p>
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<td class="memname">DECLSPEC <a class="el" href="SDL__thread_8h.html#a6a64f9be4433e4de6e2f2f548cf3c08e">int</a> SDLCALL SDL_JoystickNumHats </td>
<td>(</td>
<td class="paramtype">SDL_Joystick * </td>
<td class="paramname"><em>joystick</em></td><td>)</td>
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<p>Get the number of POV hats on a joystick. </p>
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<td class="memname">DECLSPEC SDL_Joystick* SDLCALL SDL_JoystickOpen </td>
<td>(</td>
<td class="paramtype"><a class="el" href="SDL__thread_8h.html#a6a64f9be4433e4de6e2f2f548cf3c08e">int</a> </td>
<td class="paramname"><em>device_index</em></td><td>)</td>
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<p>Open a joystick for use. The index passed as an argument refers tothe N'th joystick on the system. This index is the value which will identify this joystick in future joystick events.</p>
<dl class="section return"><dt>Returns</dt><dd>A joystick identifier, or NULL if an error occurred. </dd></dl>
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<td class="memname">DECLSPEC <a class="el" href="SDL__audio_8h.html#a52835ae37c4bb905b903cbaf5d04b05f">void</a> SDLCALL SDL_JoystickUpdate </td>
<td>(</td>
<td class="paramtype"><a class="el" href="SDL__audio_8h.html#a52835ae37c4bb905b903cbaf5d04b05f">void</a> </td>
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<p>Update the current state of the open joysticks.</p>
<p>This is called automatically by the event loop if any joystick events are enabled. </p>
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<td class="memname">DECLSPEC <a class="el" href="SDL__thread_8h.html#a6a64f9be4433e4de6e2f2f548cf3c08e">int</a> SDLCALL SDL_NumJoysticks </td>
<td>(</td>
<td class="paramtype"><a class="el" href="SDL__audio_8h.html#a52835ae37c4bb905b903cbaf5d04b05f">void</a> </td>
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<p>Count the number of joysticks attached to the system right now </p>
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