Mercurial > sdl-ios-xcode
annotate docs/html/sdljoyhatevent.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_JoyHatEvent</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="SDL Event Structures." | |
| 14 HREF="eventstructures.html"><LINK | |
| 15 REL="PREVIOUS" | |
| 16 TITLE="SDL_JoyButtonEvent" | |
| 17 HREF="sdljoybuttonevent.html"><LINK | |
| 18 REL="NEXT" | |
| 19 TITLE="SDL_JoyBallEvent" | |
| 20 HREF="sdljoyballevent.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="sdljoybuttonevent.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="sdljoyballevent.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="SDLJOYHATEVENT" | |
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74 ></A |
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75 >SDL_JoyHatEvent</H1 |
| 0 | 76 ><DIV |
| 77 CLASS="REFNAMEDIV" | |
| 78 ><A | |
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79 NAME="AEN4320" |
| 0 | 80 ></A |
| 81 ><H2 | |
| 82 >Name</H2 | |
| 83 >SDL_JoyHatEvent -- Joystick hat position change event structure</DIV | |
| 84 ><DIV | |
| 85 CLASS="REFSECT1" | |
| 86 ><A | |
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87 NAME="AEN4323" |
| 0 | 88 ></A |
| 89 ><H2 | |
| 90 >Structure Definition</H2 | |
| 91 ><PRE | |
| 92 CLASS="PROGRAMLISTING" | |
| 93 >typedef struct{ | |
| 94 Uint8 type; | |
| 95 Uint8 which; | |
| 96 Uint8 hat; | |
| 97 Uint8 value; | |
| 98 } SDL_JoyHatEvent;</PRE | |
| 99 ></DIV | |
| 100 ><DIV | |
| 101 CLASS="REFSECT1" | |
| 102 ><A | |
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103 NAME="AEN4326" |
| 0 | 104 ></A |
| 105 ><H2 | |
| 106 >Structure Data</H2 | |
| 107 ><DIV | |
| 108 CLASS="INFORMALTABLE" | |
| 109 ><A | |
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110 NAME="AEN4328" |
| 0 | 111 ></A |
| 112 ><P | |
| 113 ></P | |
| 114 ><TABLE | |
| 115 BORDER="0" | |
| 116 CLASS="CALSTABLE" | |
| 117 ><TBODY | |
| 118 ><TR | |
| 119 ><TD | |
| 120 ALIGN="LEFT" | |
| 121 VALIGN="TOP" | |
| 122 ><TT | |
| 123 CLASS="STRUCTFIELD" | |
| 124 ><I | |
| 125 >type</I | |
| 126 ></TT | |
| 127 ></TD | |
| 128 ><TD | |
| 129 ALIGN="LEFT" | |
| 130 VALIGN="TOP" | |
| 131 ><TT | |
| 132 CLASS="LITERAL" | |
| 133 >SDL_JOY</TT | |
| 134 ></TD | |
| 135 ></TR | |
| 136 ><TR | |
| 137 ><TD | |
| 138 ALIGN="LEFT" | |
| 139 VALIGN="TOP" | |
| 140 ><TT | |
| 141 CLASS="STRUCTFIELD" | |
| 142 ><I | |
| 143 >which</I | |
| 144 ></TT | |
| 145 ></TD | |
| 146 ><TD | |
| 147 ALIGN="LEFT" | |
| 148 VALIGN="TOP" | |
| 149 >Joystick device index</TD | |
| 150 ></TR | |
| 151 ><TR | |
| 152 ><TD | |
| 153 ALIGN="LEFT" | |
| 154 VALIGN="TOP" | |
| 155 ><TT | |
| 156 CLASS="STRUCTFIELD" | |
| 157 ><I | |
| 158 >hat</I | |
| 159 ></TT | |
| 160 ></TD | |
| 161 ><TD | |
| 162 ALIGN="LEFT" | |
| 163 VALIGN="TOP" | |
| 164 >Joystick hat index</TD | |
| 165 ></TR | |
| 166 ><TR | |
| 167 ><TD | |
| 168 ALIGN="LEFT" | |
| 169 VALIGN="TOP" | |
| 170 ><TT | |
| 171 CLASS="STRUCTFIELD" | |
| 172 ><I | |
| 173 >value</I | |
| 174 ></TT | |
| 175 ></TD | |
| 176 ><TD | |
| 177 ALIGN="LEFT" | |
| 178 VALIGN="TOP" | |
| 179 >Hat position</TD | |
| 180 ></TR | |
| 181 ></TBODY | |
| 182 ></TABLE | |
| 183 ><P | |
| 184 ></P | |
| 185 ></DIV | |
| 186 ></DIV | |
| 187 ><DIV | |
| 188 CLASS="REFSECT1" | |
| 189 ><A | |
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190 NAME="AEN4348" |
| 0 | 191 ></A |
| 192 ><H2 | |
| 193 >Description</H2 | |
| 194 ><P | |
| 195 ><SPAN | |
| 196 CLASS="STRUCTNAME" | |
| 197 >SDL_JoyHatEvent</SPAN | |
| 198 > is a member of the <A | |
| 199 HREF="sdlevent.html" | |
| 200 ><SPAN | |
| 201 CLASS="STRUCTNAME" | |
| 202 >SDL_Event</SPAN | |
| 203 ></A | |
| 204 > union and is used when an event of type <TT | |
| 205 CLASS="LITERAL" | |
| 206 >SDL_JOYHATMOTION</TT | |
| 207 > is reported.</P | |
| 208 ><P | |
| 209 >A <TT | |
| 210 CLASS="LITERAL" | |
| 211 >SDL_JOYHATMOTION</TT | |
| 212 > event occurs when ever a user moves a hat on the joystick. The field <TT | |
| 213 CLASS="STRUCTFIELD" | |
| 214 ><I | |
| 215 >which</I | |
| 216 ></TT | |
| 217 > is the index of the joystick that reported the event and <TT | |
| 218 CLASS="STRUCTFIELD" | |
| 219 ><I | |
| 220 >hat</I | |
| 221 ></TT | |
| 222 > is the index of the hat (for a more detailed exlaination see the <A | |
| 223 HREF="joystick.html" | |
| 224 >Joystick section</A | |
| 225 >). <TT | |
| 226 CLASS="STRUCTFIELD" | |
| 227 ><I | |
| 228 >value</I | |
| 229 ></TT | |
| 230 > is the current position of the hat. It is a logically OR'd combination of the following values (whose meanings should be pretty obvious:) :</P | |
| 231 ><P | |
| 232 ></P | |
| 233 ><TABLE | |
| 234 BORDER="0" | |
| 235 ><TBODY | |
| 236 ><TR | |
| 237 ><TD | |
| 238 ><TT | |
| 239 CLASS="LITERAL" | |
| 240 >SDL_HAT_CENTERED</TT | |
| 241 ></TD | |
| 242 ></TR | |
| 243 ><TR | |
| 244 ><TD | |
| 245 ><TT | |
| 246 CLASS="LITERAL" | |
| 247 >SDL_HAT_UP</TT | |
| 248 ></TD | |
| 249 ></TR | |
| 250 ><TR | |
| 251 ><TD | |
| 252 ><TT | |
| 253 CLASS="LITERAL" | |
| 254 >SDL_HAT_RIGHT</TT | |
| 255 ></TD | |
| 256 ></TR | |
| 257 ><TR | |
| 258 ><TD | |
| 259 ><TT | |
| 260 CLASS="LITERAL" | |
| 261 >SDL_HAT_DOWN</TT | |
| 262 ></TD | |
| 263 ></TR | |
| 264 ><TR | |
| 265 ><TD | |
| 266 ><TT | |
| 267 CLASS="LITERAL" | |
| 268 >SDL_HAT_LEFT</TT | |
| 269 ></TD | |
| 270 ></TR | |
| 271 ></TBODY | |
| 272 ></TABLE | |
| 273 ><P | |
| 274 ></P | |
| 275 ><P | |
| 276 >The following defines are also provided:</P | |
| 277 ><P | |
| 278 ></P | |
| 279 ><TABLE | |
| 280 BORDER="0" | |
| 281 ><TBODY | |
| 282 ><TR | |
| 283 ><TD | |
| 284 ><TT | |
| 285 CLASS="LITERAL" | |
| 286 >SDL_HAT_RIGHTUP</TT | |
| 287 ></TD | |
| 288 ></TR | |
| 289 ><TR | |
| 290 ><TD | |
| 291 ><TT | |
| 292 CLASS="LITERAL" | |
| 293 >SDL_HAT_RIGHTDOWN</TT | |
| 294 ></TD | |
| 295 ></TR | |
| 296 ><TR | |
| 297 ><TD | |
| 298 ><TT | |
| 299 CLASS="LITERAL" | |
| 300 >SDL_HAT_LEFTUP</TT | |
| 301 ></TD | |
| 302 ></TR | |
| 303 ><TR | |
| 304 ><TD | |
| 305 ><TT | |
| 306 CLASS="LITERAL" | |
| 307 >SDL_HAT_LEFTDOWN</TT | |
| 308 ></TD | |
| 309 ></TR | |
| 310 ></TBODY | |
| 311 ></TABLE | |
| 312 ><P | |
| 313 ></P | |
| 314 ></DIV | |
| 315 ><DIV | |
| 316 CLASS="REFSECT1" | |
| 317 ><A | |
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318 NAME="AEN4382" |
| 0 | 319 ></A |
| 320 ><H2 | |
| 321 >See Also</H2 | |
| 322 ><P | |
| 323 ><A | |
| 324 HREF="sdlevent.html" | |
| 325 ><SPAN | |
| 326 CLASS="STRUCTNAME" | |
| 327 >SDL_Event</SPAN | |
| 328 ></A | |
| 329 >, | |
| 330 <A | |
| 331 HREF="joystick.html" | |
| 332 >Joystick Functions</A | |
| 333 >, | |
| 334 <A | |
| 335 HREF="sdljoystickeventstate.html" | |
| 336 ><TT | |
| 337 CLASS="FUNCTION" | |
| 338 >SDL_JoystickEventState</TT | |
| 339 ></A | |
| 340 >, | |
| 341 <A | |
| 342 HREF="sdljoystickgetball.html" | |
| 343 ><TT | |
| 344 CLASS="FUNCTION" | |
| 345 >SDL_JoystickGetHat</TT | |
| 346 ></A | |
| 347 ></P | |
| 348 ></DIV | |
| 349 ><DIV | |
| 350 CLASS="NAVFOOTER" | |
| 351 ><HR | |
| 352 ALIGN="LEFT" | |
| 353 WIDTH="100%"><TABLE | |
|
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354 SUMMARY="Footer navigation table" |
| 0 | 355 WIDTH="100%" |
| 356 BORDER="0" | |
| 357 CELLPADDING="0" | |
| 358 CELLSPACING="0" | |
| 359 ><TR | |
| 360 ><TD | |
| 361 WIDTH="33%" | |
| 362 ALIGN="left" | |
| 363 VALIGN="top" | |
| 364 ><A | |
| 365 HREF="sdljoybuttonevent.html" | |
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366 ACCESSKEY="P" |
| 0 | 367 >Prev</A |
| 368 ></TD | |
| 369 ><TD | |
| 370 WIDTH="34%" | |
| 371 ALIGN="center" | |
| 372 VALIGN="top" | |
| 373 ><A | |
| 374 HREF="index.html" | |
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375 ACCESSKEY="H" |
| 0 | 376 >Home</A |
| 377 ></TD | |
| 378 ><TD | |
| 379 WIDTH="33%" | |
| 380 ALIGN="right" | |
| 381 VALIGN="top" | |
| 382 ><A | |
| 383 HREF="sdljoyballevent.html" | |
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384 ACCESSKEY="N" |
| 0 | 385 >Next</A |
| 386 ></TD | |
| 387 ></TR | |
| 388 ><TR | |
| 389 ><TD | |
| 390 WIDTH="33%" | |
| 391 ALIGN="left" | |
| 392 VALIGN="top" | |
| 393 >SDL_JoyButtonEvent</TD | |
| 394 ><TD | |
| 395 WIDTH="34%" | |
| 396 ALIGN="center" | |
| 397 VALIGN="top" | |
| 398 ><A | |
| 399 HREF="eventstructures.html" | |
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400 ACCESSKEY="U" |
| 0 | 401 >Up</A |
| 402 ></TD | |
| 403 ><TD | |
| 404 WIDTH="33%" | |
| 405 ALIGN="right" | |
| 406 VALIGN="top" | |
| 407 >SDL_JoyBallEvent</TD | |
| 408 ></TR | |
| 409 ></TABLE | |
| 410 ></DIV | |
| 411 ></BODY | |
| 412 ></HTML | |
| 413 > |