Mercurial > sdl-ios-xcode
annotate docs/html/sdljoystickgethat.html @ 896:b56dc586a5ef
Date: Tue, 16 Mar 2004 12:40:33 +0000
From: Alan Swanson
Subject: [SDL] [PATCH] Linux joystick evdev axis count fix
The event device configuration under Linux does not check the returned
ioctl value when reading the axis information. This means extra
undefined axes are returned.
Note, in EV_HandleEvents, the default for case EV_ABS is to return any
axis information which is fine as we have already checked for all valid
absolute axes. No new axes should be returned after opening the device.
(Unless, of course, the evdev allows closing and reassigning a new
device while in use and I can't believe that happens.)
| author | Sam Lantinga <slouken@libsdl.org> |
|---|---|
| date | Sun, 16 May 2004 22:48:06 +0000 |
| parents | 355632dca928 |
| children |
| rev | line source |
|---|---|
| 0 | 1 <HTML |
| 2 ><HEAD | |
| 3 ><TITLE | |
| 4 >SDL_JoystickGetHat</TITLE | |
| 5 ><META | |
| 6 NAME="GENERATOR" | |
|
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7 CONTENT="Modular DocBook HTML Stylesheet Version 1.76b+ |
| 0 | 8 "><LINK |
| 9 REL="HOME" | |
| 10 TITLE="SDL Library Documentation" | |
| 11 HREF="index.html"><LINK | |
| 12 REL="UP" | |
| 13 TITLE="Joystick" | |
| 14 HREF="joystick.html"><LINK | |
| 15 REL="PREVIOUS" | |
| 16 TITLE="SDL_JoystickGetAxis" | |
| 17 HREF="sdljoystickgetaxis.html"><LINK | |
| 18 REL="NEXT" | |
| 19 TITLE="SDL_JoystickGetButton" | |
| 20 HREF="sdljoystickgetbutton.html"></HEAD | |
| 21 ><BODY | |
| 22 CLASS="REFENTRY" | |
| 23 BGCOLOR="#FFF8DC" | |
| 24 TEXT="#000000" | |
| 25 LINK="#0000ee" | |
| 26 VLINK="#551a8b" | |
| 27 ALINK="#ff0000" | |
| 28 ><DIV | |
| 29 CLASS="NAVHEADER" | |
| 30 ><TABLE | |
|
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31 SUMMARY="Header navigation table" |
| 0 | 32 WIDTH="100%" |
| 33 BORDER="0" | |
| 34 CELLPADDING="0" | |
| 35 CELLSPACING="0" | |
| 36 ><TR | |
| 37 ><TH | |
| 38 COLSPAN="3" | |
| 39 ALIGN="center" | |
| 40 >SDL Library Documentation</TH | |
| 41 ></TR | |
| 42 ><TR | |
| 43 ><TD | |
| 44 WIDTH="10%" | |
| 45 ALIGN="left" | |
| 46 VALIGN="bottom" | |
| 47 ><A | |
| 48 HREF="sdljoystickgetaxis.html" | |
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49 ACCESSKEY="P" |
| 0 | 50 >Prev</A |
| 51 ></TD | |
| 52 ><TD | |
| 53 WIDTH="80%" | |
| 54 ALIGN="center" | |
| 55 VALIGN="bottom" | |
| 56 ></TD | |
| 57 ><TD | |
| 58 WIDTH="10%" | |
| 59 ALIGN="right" | |
| 60 VALIGN="bottom" | |
| 61 ><A | |
| 62 HREF="sdljoystickgetbutton.html" | |
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63 ACCESSKEY="N" |
| 0 | 64 >Next</A |
| 65 ></TD | |
| 66 ></TR | |
| 67 ></TABLE | |
| 68 ><HR | |
| 69 ALIGN="LEFT" | |
| 70 WIDTH="100%"></DIV | |
| 71 ><H1 | |
| 72 ><A | |
| 73 NAME="SDLJOYSTICKGETHAT" | |
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74 ></A |
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75 >SDL_JoystickGetHat</H1 |
| 0 | 76 ><DIV |
| 77 CLASS="REFNAMEDIV" | |
| 78 ><A | |
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79 NAME="AEN6358" |
| 0 | 80 ></A |
| 81 ><H2 | |
| 82 >Name</H2 | |
| 83 >SDL_JoystickGetHat -- Get the current state of a joystick hat</DIV | |
| 84 ><DIV | |
| 85 CLASS="REFSYNOPSISDIV" | |
| 86 ><A | |
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87 NAME="AEN6361" |
| 0 | 88 ></A |
| 89 ><H2 | |
| 90 >Synopsis</H2 | |
| 91 ><DIV | |
| 92 CLASS="FUNCSYNOPSIS" | |
| 93 ><A | |
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94 NAME="AEN6362" |
| 0 | 95 ></A |
| 96 ><P | |
| 97 ></P | |
| 98 ><PRE | |
| 99 CLASS="FUNCSYNOPSISINFO" | |
| 100 >#include "SDL.h"</PRE | |
| 101 ><P | |
| 102 ><CODE | |
| 103 ><CODE | |
| 104 CLASS="FUNCDEF" | |
| 105 >Uint8 <B | |
| 106 CLASS="FSFUNC" | |
| 107 >SDL_JoystickGetHat</B | |
| 108 ></CODE | |
| 109 >(SDL_Joystick *joystick, int hat);</CODE | |
| 110 ></P | |
| 111 ><P | |
| 112 ></P | |
| 113 ></DIV | |
| 114 ></DIV | |
| 115 ><DIV | |
| 116 CLASS="REFSECT1" | |
| 117 ><A | |
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118 NAME="AEN6368" |
| 0 | 119 ></A |
| 120 ><H2 | |
| 121 >Description</H2 | |
| 122 ><P | |
| 123 >SDL_JoystickGetHat returns the current state of the given <TT | |
| 124 CLASS="PARAMETER" | |
| 125 ><I | |
| 126 >hat</I | |
| 127 ></TT | |
| 128 > on the given <TT | |
| 129 CLASS="PARAMETER" | |
| 130 ><I | |
| 131 >joystick</I | |
| 132 ></TT | |
| 133 >.</P | |
| 134 ></DIV | |
| 135 ><DIV | |
| 136 CLASS="REFSECT1" | |
| 137 ><A | |
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138 NAME="AEN6373" |
| 0 | 139 ></A |
| 140 ><H2 | |
| 141 >Return Value</H2 | |
| 142 ><P | |
| 143 >The current state is returned as a Uint8 which is defined as an OR'd combination of one or more of the following</P | |
| 144 ><P | |
| 145 ></P | |
| 146 ><TABLE | |
| 147 BORDER="0" | |
| 148 ><TBODY | |
| 149 ><TR | |
| 150 ><TD | |
| 151 ><TT | |
| 152 CLASS="LITERAL" | |
| 153 >SDL_HAT_CENTERED</TT | |
| 154 ></TD | |
| 155 ></TR | |
| 156 ><TR | |
| 157 ><TD | |
| 158 ><TT | |
| 159 CLASS="LITERAL" | |
| 160 >SDL_HAT_UP</TT | |
| 161 ></TD | |
| 162 ></TR | |
| 163 ><TR | |
| 164 ><TD | |
| 165 ><TT | |
| 166 CLASS="LITERAL" | |
| 167 >SDL_HAT_RIGHT</TT | |
| 168 ></TD | |
| 169 ></TR | |
| 170 ><TR | |
| 171 ><TD | |
| 172 ><TT | |
| 173 CLASS="LITERAL" | |
| 174 >SDL_HAT_DOWN</TT | |
| 175 ></TD | |
| 176 ></TR | |
| 177 ><TR | |
| 178 ><TD | |
| 179 ><TT | |
| 180 CLASS="LITERAL" | |
| 181 >SDL_HAT_LEFT</TT | |
| 182 ></TD | |
| 183 ></TR | |
| 184 ><TR | |
| 185 ><TD | |
| 186 ><TT | |
| 187 CLASS="LITERAL" | |
| 188 >SDL_HAT_RIGHTUP</TT | |
| 189 ></TD | |
| 190 ></TR | |
| 191 ><TR | |
| 192 ><TD | |
| 193 ><TT | |
| 194 CLASS="LITERAL" | |
| 195 >SDL_HAT_RIGHTDOWN</TT | |
| 196 ></TD | |
| 197 ></TR | |
| 198 ><TR | |
| 199 ><TD | |
| 200 ><TT | |
| 201 CLASS="LITERAL" | |
| 202 >SDL_HAT_LEFTUP</TT | |
| 203 ></TD | |
| 204 ></TR | |
| 205 ><TR | |
| 206 ><TD | |
| 207 ><TT | |
| 208 CLASS="LITERAL" | |
| 209 >SDL_HAT_LEFTDOWN</TT | |
| 210 ></TD | |
| 211 ></TR | |
| 212 ></TBODY | |
| 213 ></TABLE | |
| 214 ><P | |
| 215 ></P | |
| 216 ></DIV | |
| 217 ><DIV | |
| 218 CLASS="REFSECT1" | |
| 219 ><A | |
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220 NAME="AEN6395" |
| 0 | 221 ></A |
| 222 ><H2 | |
| 223 >See Also</H2 | |
| 224 ><P | |
| 225 ><A | |
| 226 HREF="sdljoysticknumhats.html" | |
| 227 ><TT | |
| 228 CLASS="FUNCTION" | |
| 229 >SDL_JoystickNumHats</TT | |
| 230 ></A | |
| 231 ></P | |
| 232 ></DIV | |
| 233 ><DIV | |
| 234 CLASS="NAVFOOTER" | |
| 235 ><HR | |
| 236 ALIGN="LEFT" | |
| 237 WIDTH="100%"><TABLE | |
|
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parents:
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238 SUMMARY="Footer navigation table" |
| 0 | 239 WIDTH="100%" |
| 240 BORDER="0" | |
| 241 CELLPADDING="0" | |
| 242 CELLSPACING="0" | |
| 243 ><TR | |
| 244 ><TD | |
| 245 WIDTH="33%" | |
| 246 ALIGN="left" | |
| 247 VALIGN="top" | |
| 248 ><A | |
| 249 HREF="sdljoystickgetaxis.html" | |
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803
355632dca928
Updated SDL HTML documentation
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parents:
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diff
changeset
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250 ACCESSKEY="P" |
| 0 | 251 >Prev</A |
| 252 ></TD | |
| 253 ><TD | |
| 254 WIDTH="34%" | |
| 255 ALIGN="center" | |
| 256 VALIGN="top" | |
| 257 ><A | |
| 258 HREF="index.html" | |
|
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parents:
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259 ACCESSKEY="H" |
| 0 | 260 >Home</A |
| 261 ></TD | |
| 262 ><TD | |
| 263 WIDTH="33%" | |
| 264 ALIGN="right" | |
| 265 VALIGN="top" | |
| 266 ><A | |
| 267 HREF="sdljoystickgetbutton.html" | |
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803
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268 ACCESSKEY="N" |
| 0 | 269 >Next</A |
| 270 ></TD | |
| 271 ></TR | |
| 272 ><TR | |
| 273 ><TD | |
| 274 WIDTH="33%" | |
| 275 ALIGN="left" | |
| 276 VALIGN="top" | |
| 277 >SDL_JoystickGetAxis</TD | |
| 278 ><TD | |
| 279 WIDTH="34%" | |
| 280 ALIGN="center" | |
| 281 VALIGN="top" | |
| 282 ><A | |
| 283 HREF="joystick.html" | |
|
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284 ACCESSKEY="U" |
| 0 | 285 >Up</A |
| 286 ></TD | |
| 287 ><TD | |
| 288 WIDTH="33%" | |
| 289 ALIGN="right" | |
| 290 VALIGN="top" | |
| 291 >SDL_JoystickGetButton</TD | |
| 292 ></TR | |
| 293 ></TABLE | |
| 294 ></DIV | |
| 295 ></BODY | |
| 296 ></HTML | |
| 297 > |