Mercurial > sdl-ios-xcode
annotate docs/html/sdljoyballevent.html @ 2328:91e601d9df8b
re: bug#563. checking in some commented out trace code and a fix so that the in testalpha.c the background only flashes when alpha == 255. The problem that is being
fixed is caused by clearing SDL_COPY_RLE_COLORKEY without setting SDL_COPY_RLE_DESIRED in SDL_UnRELSurface.
| author | Bob Pendleton <bob@pendleton.com> |
|---|---|
| date | Fri, 14 Mar 2008 18:17:49 +0000 |
| parents | 355632dca928 |
| children |
| rev | line source |
|---|---|
| 0 | 1 <HTML |
| 2 ><HEAD | |
| 3 ><TITLE | |
| 4 >SDL_JoyBallEvent</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_JoyHatEvent" | |
| 17 HREF="sdljoyhatevent.html"><LINK | |
| 18 REL="NEXT" | |
| 19 TITLE="SDL_ResizeEvent" | |
| 20 HREF="sdlresizeevent.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="sdljoyhatevent.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="sdlresizeevent.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="SDLJOYBALLEVENT" | |
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74 ></A |
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75 >SDL_JoyBallEvent</H1 |
| 0 | 76 ><DIV |
| 77 CLASS="REFNAMEDIV" | |
| 78 ><A | |
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79 NAME="AEN4396" |
| 0 | 80 ></A |
| 81 ><H2 | |
| 82 >Name</H2 | |
| 83 >SDL_JoyBallEvent -- Joystick trackball motion event structure</DIV | |
| 84 ><DIV | |
| 85 CLASS="REFSECT1" | |
| 86 ><A | |
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87 NAME="AEN4399" |
| 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 ball; | |
| 97 Sint16 xrel, yrel; | |
| 98 } SDL_JoyBallEvent;</PRE | |
| 99 ></DIV | |
| 100 ><DIV | |
| 101 CLASS="REFSECT1" | |
| 102 ><A | |
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103 NAME="AEN4402" |
| 0 | 104 ></A |
| 105 ><H2 | |
| 106 >Structure Data</H2 | |
| 107 ><DIV | |
| 108 CLASS="INFORMALTABLE" | |
| 109 ><A | |
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110 NAME="AEN4404" |
| 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_JOYBALLMOTION</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 >ball</I | |
| 159 ></TT | |
| 160 ></TD | |
| 161 ><TD | |
| 162 ALIGN="LEFT" | |
| 163 VALIGN="TOP" | |
| 164 >Joystick trackball index</TD | |
| 165 ></TR | |
| 166 ><TR | |
| 167 ><TD | |
| 168 ALIGN="LEFT" | |
| 169 VALIGN="TOP" | |
| 170 ><TT | |
| 171 CLASS="STRUCTFIELD" | |
| 172 ><I | |
| 173 >xrel</I | |
| 174 ></TT | |
| 175 >, <TT | |
| 176 CLASS="STRUCTFIELD" | |
| 177 ><I | |
| 178 >yrel</I | |
| 179 ></TT | |
| 180 ></TD | |
| 181 ><TD | |
| 182 ALIGN="LEFT" | |
| 183 VALIGN="TOP" | |
| 184 >The relative motion in the X/Y direction</TD | |
| 185 ></TR | |
| 186 ></TBODY | |
| 187 ></TABLE | |
| 188 ><P | |
| 189 ></P | |
| 190 ></DIV | |
| 191 ></DIV | |
| 192 ><DIV | |
| 193 CLASS="REFSECT1" | |
| 194 ><A | |
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195 NAME="AEN4425" |
| 0 | 196 ></A |
| 197 ><H2 | |
| 198 >Description</H2 | |
| 199 ><P | |
| 200 ><SPAN | |
| 201 CLASS="STRUCTNAME" | |
| 202 >SDL_JoyBallEvent</SPAN | |
| 203 > is a member of the <A | |
| 204 HREF="sdlevent.html" | |
| 205 ><SPAN | |
| 206 CLASS="STRUCTNAME" | |
| 207 >SDL_Event</SPAN | |
| 208 ></A | |
| 209 > union and is used when an event of type <TT | |
| 210 CLASS="LITERAL" | |
| 211 >SDL_JOYBALLMOTION</TT | |
| 212 > is reported.</P | |
| 213 ><P | |
| 214 >A <TT | |
| 215 CLASS="LITERAL" | |
| 216 >SDL_JOYBALLMOTION</TT | |
| 217 > event occurs when a user moves a trackball on the joystick. The field <TT | |
| 218 CLASS="STRUCTFIELD" | |
| 219 ><I | |
| 220 >which</I | |
| 221 ></TT | |
| 222 > is the index of the joystick that reported the event and <TT | |
| 223 CLASS="STRUCTFIELD" | |
| 224 ><I | |
| 225 >ball</I | |
| 226 ></TT | |
| 227 > is the index of the trackball (for a more detailed explaination see the <A | |
| 228 HREF="joystick.html" | |
| 229 >Joystick section</A | |
| 230 >). Trackballs only return relative motion, this is the change in position on the ball since it was last polled (last cycle of the event loop) and it is stored in <TT | |
| 231 CLASS="STRUCTFIELD" | |
| 232 ><I | |
| 233 >xrel</I | |
| 234 ></TT | |
| 235 > and <TT | |
| 236 CLASS="STRUCTFIELD" | |
| 237 ><I | |
| 238 >yrel</I | |
| 239 ></TT | |
| 240 >.</P | |
| 241 ></DIV | |
| 242 ><DIV | |
| 243 CLASS="REFSECT1" | |
| 244 ><A | |
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245 NAME="AEN4439" |
| 0 | 246 ></A |
| 247 ><H2 | |
| 248 >See Also</H2 | |
| 249 ><P | |
| 250 ><A | |
| 251 HREF="sdlevent.html" | |
| 252 ><SPAN | |
| 253 CLASS="STRUCTNAME" | |
| 254 >SDL_Event</SPAN | |
| 255 ></A | |
| 256 >, | |
| 257 <A | |
| 258 HREF="joystick.html" | |
| 259 >Joystick Functions</A | |
| 260 >, | |
| 261 <A | |
| 262 HREF="sdljoystickeventstate.html" | |
| 263 ><TT | |
| 264 CLASS="FUNCTION" | |
| 265 >SDL_JoystickEventState</TT | |
| 266 ></A | |
| 267 >, | |
| 268 <A | |
| 269 HREF="sdljoystickgetball.html" | |
| 270 ><TT | |
| 271 CLASS="FUNCTION" | |
| 272 >SDL_JoystickGetBall</TT | |
| 273 ></A | |
| 274 ></P | |
| 275 ></DIV | |
| 276 ><DIV | |
| 277 CLASS="NAVFOOTER" | |
| 278 ><HR | |
| 279 ALIGN="LEFT" | |
| 280 WIDTH="100%"><TABLE | |
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281 SUMMARY="Footer navigation table" |
| 0 | 282 WIDTH="100%" |
| 283 BORDER="0" | |
| 284 CELLPADDING="0" | |
| 285 CELLSPACING="0" | |
| 286 ><TR | |
| 287 ><TD | |
| 288 WIDTH="33%" | |
| 289 ALIGN="left" | |
| 290 VALIGN="top" | |
| 291 ><A | |
| 292 HREF="sdljoyhatevent.html" | |
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293 ACCESSKEY="P" |
| 0 | 294 >Prev</A |
| 295 ></TD | |
| 296 ><TD | |
| 297 WIDTH="34%" | |
| 298 ALIGN="center" | |
| 299 VALIGN="top" | |
| 300 ><A | |
| 301 HREF="index.html" | |
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302 ACCESSKEY="H" |
| 0 | 303 >Home</A |
| 304 ></TD | |
| 305 ><TD | |
| 306 WIDTH="33%" | |
| 307 ALIGN="right" | |
| 308 VALIGN="top" | |
| 309 ><A | |
| 310 HREF="sdlresizeevent.html" | |
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311 ACCESSKEY="N" |
| 0 | 312 >Next</A |
| 313 ></TD | |
| 314 ></TR | |
| 315 ><TR | |
| 316 ><TD | |
| 317 WIDTH="33%" | |
| 318 ALIGN="left" | |
| 319 VALIGN="top" | |
| 320 >SDL_JoyHatEvent</TD | |
| 321 ><TD | |
| 322 WIDTH="34%" | |
| 323 ALIGN="center" | |
| 324 VALIGN="top" | |
| 325 ><A | |
| 326 HREF="eventstructures.html" | |
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327 ACCESSKEY="U" |
| 0 | 328 >Up</A |
| 329 ></TD | |
| 330 ><TD | |
| 331 WIDTH="33%" | |
| 332 ALIGN="right" | |
| 333 VALIGN="top" | |
| 334 >SDL_ResizeEvent</TD | |
| 335 ></TR | |
| 336 ></TABLE | |
| 337 ></DIV | |
| 338 ></BODY | |
| 339 ></HTML | |
| 340 > |