Mercurial > sdl-ios-xcode
annotate docs/html/sdlpollevent.html @ 914:bbf8dcc8aed6
Date: Wed, 23 Jun 2004 17:05:33 -0400
From: Chris Nelson
Subject: [SDL] [Patch] WiseGroup MP-8800 / MP-8866 (PS2 Joystick)
In the current cvs version, SDL doesn't handle these Playstation2
controller => USB adapters correctly, in linux.
It will always assume that the maximum number of joysticks (2 in the
case of the MP-8866, 4 in the case of the 8800) are plugged in. This is
bad not only because it allows SDL to exaggerate the number of logical
joysticks, but primarily because the joystick axes are mapped
incorrectly, all over the place, such that the devices are effectively
unusable unless you have the maximum number of joysticks plugged in.
My changes to src/joystick/linux/SDL_sysjoystick.c build on another's
previous work (which was a special case for this very joystick,
actually), and fix both of these problems, as well as making the current
code a little more general, to allow for others to more easily drop in
code for quirky joysticks such as these.
I've tested this code under 2.6.7 as well as 2.4.24... Both work as
advertised (provided you load the JOYDEV linux code as a module,
otherwise they won't work at all, new code or old, but that's another
issue entirely).
Though this sounds horribly formal, you have my permission to distribute
all of my work on this issue under the LGPL. So there.
author | Sam Lantinga <slouken@libsdl.org> |
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date | Sun, 25 Jul 2004 18:31:50 +0000 |
parents | 355632dca928 |
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rev | line source |
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0 | 1 <HTML |
2 ><HEAD | |
3 ><TITLE | |
4 >SDL_PollEvent</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="Event Functions." | |
14 HREF="eventfunctions.html"><LINK | |
15 REL="PREVIOUS" | |
16 TITLE="SDL_PeepEvents" | |
17 HREF="sdlpeepevents.html"><LINK | |
18 REL="NEXT" | |
19 TITLE="SDL_WaitEvent" | |
20 HREF="sdlwaitevent.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="sdlpeepevents.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="sdlwaitevent.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="SDLPOLLEVENT" | |
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74 ></A |
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75 >SDL_PollEvent</H1 |
0 | 76 ><DIV |
77 CLASS="REFNAMEDIV" | |
78 ><A | |
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79 NAME="AEN5472" |
0 | 80 ></A |
81 ><H2 | |
82 >Name</H2 | |
83 >SDL_PollEvent -- Polls for currently pending events.</DIV | |
84 ><DIV | |
85 CLASS="REFSYNOPSISDIV" | |
86 ><A | |
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87 NAME="AEN5475" |
0 | 88 ></A |
89 ><H2 | |
90 >Synopsis</H2 | |
91 ><DIV | |
92 CLASS="FUNCSYNOPSIS" | |
93 ><A | |
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94 NAME="AEN5476" |
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 >int <B | |
106 CLASS="FSFUNC" | |
107 >SDL_PollEvent</B | |
108 ></CODE | |
109 >(SDL_Event *event);</CODE | |
110 ></P | |
111 ><P | |
112 ></P | |
113 ></DIV | |
114 ></DIV | |
115 ><DIV | |
116 CLASS="REFSECT1" | |
117 ><A | |
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118 NAME="AEN5482" |
0 | 119 ></A |
120 ><H2 | |
121 >Description</H2 | |
122 ><P | |
123 >Polls for currently pending events, and returns <SPAN | |
124 CLASS="RETURNVALUE" | |
125 >1</SPAN | |
126 > | |
127 if there are any pending events, or <SPAN | |
128 CLASS="RETURNVALUE" | |
129 >0</SPAN | |
130 > if there | |
131 are none available. </P | |
132 ><P | |
133 >If <TT | |
134 CLASS="PARAMETER" | |
135 ><I | |
136 >event</I | |
137 ></TT | |
138 > is not <TT | |
139 CLASS="LITERAL" | |
140 >NULL</TT | |
141 >, the next | |
142 event is removed from the queue and stored in that area.</P | |
143 ></DIV | |
144 ><DIV | |
145 CLASS="REFSECT1" | |
146 ><A | |
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147 NAME="AEN5490" |
0 | 148 ></A |
149 ><H2 | |
150 >Examples</H2 | |
151 ><P | |
152 ><PRE | |
153 CLASS="PROGRAMLISTING" | |
154 >SDL_Event event; /* Event structure */ | |
155 | |
156 . | |
157 . | |
158 . | |
159 /* Check for events */ | |
160 while(SDL_PollEvent(&event)){ /* Loop until there are no events left on the queue */ | |
161 switch(event.type){ /* Process the appropiate event type */ | |
162 case SDL_KEYDOWN: /* Handle a KEYDOWN event */ | |
163 printf("Oh! Key press\n"); | |
164 break; | |
165 case SDL_MOUSEMOTION: | |
166 . | |
167 . | |
168 . | |
169 default: /* Report an unhandled event */ | |
170 printf("I don't know what this event is!\n"); | |
171 } | |
172 }</PRE | |
173 ></P | |
174 ></DIV | |
175 ><DIV | |
176 CLASS="REFSECT1" | |
177 ><A | |
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178 NAME="AEN5494" |
0 | 179 ></A |
180 ><H2 | |
181 >See Also</H2 | |
182 ><P | |
183 ><A | |
184 HREF="sdlevent.html" | |
185 ><SPAN | |
186 CLASS="STRUCTNAME" | |
187 >SDL_Event</SPAN | |
188 ></A | |
189 >, | |
190 <A | |
191 HREF="sdlwaitevent.html" | |
192 ><TT | |
193 CLASS="FUNCTION" | |
194 >SDL_WaitEvent</TT | |
195 ></A | |
196 >, | |
197 <A | |
198 HREF="sdlpeepevents.html" | |
199 ><TT | |
200 CLASS="FUNCTION" | |
201 >SDL_PeepEvents</TT | |
202 ></A | |
203 ></P | |
204 ></DIV | |
205 ><DIV | |
206 CLASS="NAVFOOTER" | |
207 ><HR | |
208 ALIGN="LEFT" | |
209 WIDTH="100%"><TABLE | |
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210 SUMMARY="Footer navigation table" |
0 | 211 WIDTH="100%" |
212 BORDER="0" | |
213 CELLPADDING="0" | |
214 CELLSPACING="0" | |
215 ><TR | |
216 ><TD | |
217 WIDTH="33%" | |
218 ALIGN="left" | |
219 VALIGN="top" | |
220 ><A | |
221 HREF="sdlpeepevents.html" | |
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222 ACCESSKEY="P" |
0 | 223 >Prev</A |
224 ></TD | |
225 ><TD | |
226 WIDTH="34%" | |
227 ALIGN="center" | |
228 VALIGN="top" | |
229 ><A | |
230 HREF="index.html" | |
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231 ACCESSKEY="H" |
0 | 232 >Home</A |
233 ></TD | |
234 ><TD | |
235 WIDTH="33%" | |
236 ALIGN="right" | |
237 VALIGN="top" | |
238 ><A | |
239 HREF="sdlwaitevent.html" | |
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240 ACCESSKEY="N" |
0 | 241 >Next</A |
242 ></TD | |
243 ></TR | |
244 ><TR | |
245 ><TD | |
246 WIDTH="33%" | |
247 ALIGN="left" | |
248 VALIGN="top" | |
249 >SDL_PeepEvents</TD | |
250 ><TD | |
251 WIDTH="34%" | |
252 ALIGN="center" | |
253 VALIGN="top" | |
254 ><A | |
255 HREF="eventfunctions.html" | |
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256 ACCESSKEY="U" |
0 | 257 >Up</A |
258 ></TD | |
259 ><TD | |
260 WIDTH="33%" | |
261 ALIGN="right" | |
262 VALIGN="top" | |
263 >SDL_WaitEvent</TD | |
264 ></TR | |
265 ></TABLE | |
266 ></DIV | |
267 ></BODY | |
268 ></HTML | |
269 > |