Mercurial > sdl-ios-xcode
annotate docs/html/sdlpollevent.html @ 456:b4e14b15af3c
Fixed crash with invalid bpp in SDL_SetVideoMode()
| author | Sam Lantinga <slouken@libsdl.org> |
|---|---|
| date | Tue, 20 Aug 2002 04:44:36 +0000 |
| parents | e5bc29de3f0a |
| children | 355632dca928 |
| rev | line source |
|---|---|
| 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 1.64 |
| 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 | |
| 31 WIDTH="100%" | |
| 32 BORDER="0" | |
| 33 CELLPADDING="0" | |
| 34 CELLSPACING="0" | |
| 35 ><TR | |
| 36 ><TH | |
| 37 COLSPAN="3" | |
| 38 ALIGN="center" | |
| 39 >SDL Library Documentation</TH | |
| 40 ></TR | |
| 41 ><TR | |
| 42 ><TD | |
| 43 WIDTH="10%" | |
| 44 ALIGN="left" | |
| 45 VALIGN="bottom" | |
| 46 ><A | |
| 47 HREF="sdlpeepevents.html" | |
| 48 >Prev</A | |
| 49 ></TD | |
| 50 ><TD | |
| 51 WIDTH="80%" | |
| 52 ALIGN="center" | |
| 53 VALIGN="bottom" | |
| 54 ></TD | |
| 55 ><TD | |
| 56 WIDTH="10%" | |
| 57 ALIGN="right" | |
| 58 VALIGN="bottom" | |
| 59 ><A | |
| 60 HREF="sdlwaitevent.html" | |
| 61 >Next</A | |
| 62 ></TD | |
| 63 ></TR | |
| 64 ></TABLE | |
| 65 ><HR | |
| 66 ALIGN="LEFT" | |
| 67 WIDTH="100%"></DIV | |
| 68 ><H1 | |
| 69 ><A | |
| 70 NAME="SDLPOLLEVENT" | |
| 71 >SDL_PollEvent</A | |
| 72 ></H1 | |
| 73 ><DIV | |
| 74 CLASS="REFNAMEDIV" | |
| 75 ><A | |
|
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76 NAME="AEN5084" |
| 0 | 77 ></A |
| 78 ><H2 | |
| 79 >Name</H2 | |
| 80 >SDL_PollEvent -- Polls for currently pending events.</DIV | |
| 81 ><DIV | |
| 82 CLASS="REFSYNOPSISDIV" | |
| 83 ><A | |
|
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84 NAME="AEN5087" |
| 0 | 85 ></A |
| 86 ><H2 | |
| 87 >Synopsis</H2 | |
| 88 ><DIV | |
| 89 CLASS="FUNCSYNOPSIS" | |
| 90 ><A | |
|
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91 NAME="AEN5088" |
| 0 | 92 ></A |
| 93 ><P | |
| 94 ></P | |
| 95 ><PRE | |
| 96 CLASS="FUNCSYNOPSISINFO" | |
| 97 >#include "SDL.h"</PRE | |
| 98 ><P | |
| 99 ><CODE | |
| 100 ><CODE | |
| 101 CLASS="FUNCDEF" | |
| 102 >int <B | |
| 103 CLASS="FSFUNC" | |
| 104 >SDL_PollEvent</B | |
| 105 ></CODE | |
| 106 >(SDL_Event *event);</CODE | |
| 107 ></P | |
| 108 ><P | |
| 109 ></P | |
| 110 ></DIV | |
| 111 ></DIV | |
| 112 ><DIV | |
| 113 CLASS="REFSECT1" | |
| 114 ><A | |
|
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115 NAME="AEN5094" |
| 0 | 116 ></A |
| 117 ><H2 | |
| 118 >Description</H2 | |
| 119 ><P | |
| 120 >Polls for currently pending events, and returns <SPAN | |
| 121 CLASS="RETURNVALUE" | |
| 122 >1</SPAN | |
| 123 > | |
| 124 if there are any pending events, or <SPAN | |
| 125 CLASS="RETURNVALUE" | |
| 126 >0</SPAN | |
| 127 > if there | |
| 128 are none available. </P | |
| 129 ><P | |
| 130 >If <TT | |
| 131 CLASS="PARAMETER" | |
| 132 ><I | |
| 133 >event</I | |
| 134 ></TT | |
| 135 > is not <TT | |
| 136 CLASS="LITERAL" | |
| 137 >NULL</TT | |
| 138 >, the next | |
| 139 event is removed from the queue and stored in that area.</P | |
| 140 ></DIV | |
| 141 ><DIV | |
| 142 CLASS="REFSECT1" | |
| 143 ><A | |
|
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144 NAME="AEN5102" |
| 0 | 145 ></A |
| 146 ><H2 | |
| 147 >Examples</H2 | |
| 148 ><P | |
| 149 ><PRE | |
| 150 CLASS="PROGRAMLISTING" | |
| 151 >SDL_Event event; /* Event structure */ | |
| 152 | |
| 153 . | |
| 154 . | |
| 155 . | |
| 156 /* Check for events */ | |
| 157 while(SDL_PollEvent(&event)){ /* Loop until there are no events left on the queue */ | |
| 158 switch(event.type){ /* Process the appropiate event type */ | |
| 159 case SDL_KEYDOWN: /* Handle a KEYDOWN event */ | |
| 160 printf("Oh! Key press\n"); | |
| 161 break; | |
| 162 case SDL_MOUSEMOTION: | |
| 163 . | |
| 164 . | |
| 165 . | |
| 166 default: /* Report an unhandled event */ | |
| 167 printf("I don't know what this event is!\n"); | |
| 168 } | |
| 169 }</PRE | |
| 170 ></P | |
| 171 ></DIV | |
| 172 ><DIV | |
| 173 CLASS="REFSECT1" | |
| 174 ><A | |
|
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175 NAME="AEN5106" |
| 0 | 176 ></A |
| 177 ><H2 | |
| 178 >See Also</H2 | |
| 179 ><P | |
| 180 ><A | |
| 181 HREF="sdlevent.html" | |
| 182 ><SPAN | |
| 183 CLASS="STRUCTNAME" | |
| 184 >SDL_Event</SPAN | |
| 185 ></A | |
| 186 >, | |
| 187 <A | |
| 188 HREF="sdlwaitevent.html" | |
| 189 ><TT | |
| 190 CLASS="FUNCTION" | |
| 191 >SDL_WaitEvent</TT | |
| 192 ></A | |
| 193 >, | |
| 194 <A | |
| 195 HREF="sdlpeepevents.html" | |
| 196 ><TT | |
| 197 CLASS="FUNCTION" | |
| 198 >SDL_PeepEvents</TT | |
| 199 ></A | |
| 200 ></P | |
| 201 ></DIV | |
| 202 ><DIV | |
| 203 CLASS="NAVFOOTER" | |
| 204 ><HR | |
| 205 ALIGN="LEFT" | |
| 206 WIDTH="100%"><TABLE | |
| 207 WIDTH="100%" | |
| 208 BORDER="0" | |
| 209 CELLPADDING="0" | |
| 210 CELLSPACING="0" | |
| 211 ><TR | |
| 212 ><TD | |
| 213 WIDTH="33%" | |
| 214 ALIGN="left" | |
| 215 VALIGN="top" | |
| 216 ><A | |
| 217 HREF="sdlpeepevents.html" | |
| 218 >Prev</A | |
| 219 ></TD | |
| 220 ><TD | |
| 221 WIDTH="34%" | |
| 222 ALIGN="center" | |
| 223 VALIGN="top" | |
| 224 ><A | |
| 225 HREF="index.html" | |
| 226 >Home</A | |
| 227 ></TD | |
| 228 ><TD | |
| 229 WIDTH="33%" | |
| 230 ALIGN="right" | |
| 231 VALIGN="top" | |
| 232 ><A | |
| 233 HREF="sdlwaitevent.html" | |
| 234 >Next</A | |
| 235 ></TD | |
| 236 ></TR | |
| 237 ><TR | |
| 238 ><TD | |
| 239 WIDTH="33%" | |
| 240 ALIGN="left" | |
| 241 VALIGN="top" | |
| 242 >SDL_PeepEvents</TD | |
| 243 ><TD | |
| 244 WIDTH="34%" | |
| 245 ALIGN="center" | |
| 246 VALIGN="top" | |
| 247 ><A | |
| 248 HREF="eventfunctions.html" | |
| 249 >Up</A | |
| 250 ></TD | |
| 251 ><TD | |
| 252 WIDTH="33%" | |
| 253 ALIGN="right" | |
| 254 VALIGN="top" | |
| 255 >SDL_WaitEvent</TD | |
| 256 ></TR | |
| 257 ></TABLE | |
| 258 ></DIV | |
| 259 ></BODY | |
| 260 ></HTML | |
| 261 > |