Mercurial > sdl-ios-xcode
annotate docs/html/sdlquitevent.html @ 2866:e532417a6977
Fixed SDL 1.2 compatibility problem.
The API specifies that SDL_OpenAudio() will fill out the 'desired' audio spec
with the correct samples and size set by the driver. This value is important
since it may be used by applications that size audio buffers, etc.
However, we want to allow advanced applications to call SDL_OpenAudioDevice()
which gets passed a const 'desired' parameter, and have the correct data filled
into the 'obtained' parameter, possibly allowing or not allowing format changes.
So... 'obtained' becomes the audio format the user callback is expected to use,
and we add flags to allow the application to specify which format changes are
allowed.
Note: We really need to add a way to query the 'obtained' audio spec.
| author | Sam Lantinga <slouken@libsdl.org> |
|---|---|
| date | Sat, 13 Dec 2008 06:36:47 +0000 |
| parents | 355632dca928 |
| children |
| rev | line source |
|---|---|
| 0 | 1 <HTML |
| 2 ><HEAD | |
| 3 ><TITLE | |
| 4 >SDL_QuitEvent</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_UserEvent" | |
| 17 HREF="sdluserevent.html"><LINK | |
| 18 REL="NEXT" | |
| 19 TITLE="SDL_keysym" | |
| 20 HREF="sdlkeysym.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="sdluserevent.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="sdlkeysym.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="SDLQUITEVENT" | |
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74 ></A |
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75 >SDL_QuitEvent</H1 |
| 0 | 76 ><DIV |
| 77 CLASS="REFNAMEDIV" | |
| 78 ><A | |
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79 NAME="AEN4621" |
| 0 | 80 ></A |
| 81 ><H2 | |
| 82 >Name</H2 | |
| 83 >SDL_QuitEvent -- Quit requested event</DIV | |
| 84 ><DIV | |
| 85 CLASS="REFSECT1" | |
| 86 ><A | |
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87 NAME="AEN4624" |
| 0 | 88 ></A |
| 89 ><H2 | |
| 90 >Structure Definition</H2 | |
| 91 ><PRE | |
| 92 CLASS="PROGRAMLISTING" | |
| 93 >typedef struct{ | |
| 94 Uint8 type | |
| 95 } SDL_QuitEvent;</PRE | |
| 96 ></DIV | |
| 97 ><DIV | |
| 98 CLASS="REFSECT1" | |
| 99 ><A | |
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100 NAME="AEN4627" |
| 0 | 101 ></A |
| 102 ><H2 | |
| 103 >Structure Data</H2 | |
| 104 ><DIV | |
| 105 CLASS="INFORMALTABLE" | |
| 106 ><A | |
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107 NAME="AEN4629" |
| 0 | 108 ></A |
| 109 ><P | |
| 110 ></P | |
| 111 ><TABLE | |
| 112 BORDER="0" | |
| 113 CLASS="CALSTABLE" | |
| 114 ><TBODY | |
| 115 ><TR | |
| 116 ><TD | |
| 117 ALIGN="LEFT" | |
| 118 VALIGN="TOP" | |
| 119 ><TT | |
| 120 CLASS="STRUCTFIELD" | |
| 121 ><I | |
| 122 >type</I | |
| 123 ></TT | |
| 124 ></TD | |
| 125 ><TD | |
| 126 ALIGN="LEFT" | |
| 127 VALIGN="TOP" | |
| 128 ><TT | |
| 129 CLASS="LITERAL" | |
| 130 >SDL_QUIT</TT | |
| 131 ></TD | |
| 132 ></TR | |
| 133 ></TBODY | |
| 134 ></TABLE | |
| 135 ><P | |
| 136 ></P | |
| 137 ></DIV | |
| 138 ></DIV | |
| 139 ><DIV | |
| 140 CLASS="REFSECT1" | |
| 141 ><A | |
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142 NAME="AEN4637" |
| 0 | 143 ></A |
| 144 ><H2 | |
| 145 >Description</H2 | |
| 146 ><P | |
| 147 ><SPAN | |
| 148 CLASS="STRUCTNAME" | |
| 149 >SDL_QuitEvent</SPAN | |
| 150 > is a member of the <A | |
| 151 HREF="sdlevent.html" | |
| 152 ><SPAN | |
| 153 CLASS="STRUCTNAME" | |
| 154 >SDL_Event</SPAN | |
| 155 ></A | |
| 156 > union and is used whan an event of type <TT | |
| 157 CLASS="LITERAL" | |
| 158 >SDL_QUIT</TT | |
| 159 > is reported.</P | |
| 160 ><P | |
| 161 >As can be seen, the SDL_QuitEvent structure serves no useful purpose. The event itself, on the other hand, is very important. If you filter out or ignore a quit event then it is impossible for the user to close the window. On the other hand, if you do accept a quit event then the application window will be closed, and screen updates will still report success event though the application will no longer be visible.</P | |
| 162 ><DIV | |
| 163 CLASS="NOTE" | |
| 164 ><BLOCKQUOTE | |
| 165 CLASS="NOTE" | |
| 166 ><P | |
| 167 ><B | |
| 168 >Note: </B | |
| 169 >The macro <TT | |
| 170 CLASS="FUNCTION" | |
| 171 >SDL_QuitRequested</TT | |
| 172 > will return non-zero if a quit event is pending</P | |
| 173 ></BLOCKQUOTE | |
| 174 ></DIV | |
| 175 ></DIV | |
| 176 ><DIV | |
| 177 CLASS="REFSECT1" | |
| 178 ><A | |
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179 NAME="AEN4648" |
| 0 | 180 ></A |
| 181 ><H2 | |
| 182 >See Also</H2 | |
| 183 ><P | |
| 184 ><A | |
| 185 HREF="sdlevent.html" | |
| 186 ><SPAN | |
| 187 CLASS="STRUCTNAME" | |
| 188 >SDL_Event</SPAN | |
| 189 ></A | |
| 190 >, | |
| 191 <A | |
| 192 HREF="sdlseteventfilter.html" | |
| 193 ><TT | |
| 194 CLASS="FUNCTION" | |
| 195 >SDL_SetEventFilter</TT | |
| 196 ></A | |
| 197 ></P | |
| 198 ></DIV | |
| 199 ><DIV | |
| 200 CLASS="NAVFOOTER" | |
| 201 ><HR | |
| 202 ALIGN="LEFT" | |
| 203 WIDTH="100%"><TABLE | |
|
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204 SUMMARY="Footer navigation table" |
| 0 | 205 WIDTH="100%" |
| 206 BORDER="0" | |
| 207 CELLPADDING="0" | |
| 208 CELLSPACING="0" | |
| 209 ><TR | |
| 210 ><TD | |
| 211 WIDTH="33%" | |
| 212 ALIGN="left" | |
| 213 VALIGN="top" | |
| 214 ><A | |
| 215 HREF="sdluserevent.html" | |
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355632dca928
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parents:
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changeset
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216 ACCESSKEY="P" |
| 0 | 217 >Prev</A |
| 218 ></TD | |
| 219 ><TD | |
| 220 WIDTH="34%" | |
| 221 ALIGN="center" | |
| 222 VALIGN="top" | |
| 223 ><A | |
| 224 HREF="index.html" | |
|
803
355632dca928
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parents:
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225 ACCESSKEY="H" |
| 0 | 226 >Home</A |
| 227 ></TD | |
| 228 ><TD | |
| 229 WIDTH="33%" | |
| 230 ALIGN="right" | |
| 231 VALIGN="top" | |
| 232 ><A | |
| 233 HREF="sdlkeysym.html" | |
|
803
355632dca928
Updated SDL HTML documentation
Sam Lantinga <slouken@libsdl.org>
parents:
181
diff
changeset
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234 ACCESSKEY="N" |
| 0 | 235 >Next</A |
| 236 ></TD | |
| 237 ></TR | |
| 238 ><TR | |
| 239 ><TD | |
| 240 WIDTH="33%" | |
| 241 ALIGN="left" | |
| 242 VALIGN="top" | |
| 243 >SDL_UserEvent</TD | |
| 244 ><TD | |
| 245 WIDTH="34%" | |
| 246 ALIGN="center" | |
| 247 VALIGN="top" | |
| 248 ><A | |
| 249 HREF="eventstructures.html" | |
|
803
355632dca928
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parents:
181
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250 ACCESSKEY="U" |
| 0 | 251 >Up</A |
| 252 ></TD | |
| 253 ><TD | |
| 254 WIDTH="33%" | |
| 255 ALIGN="right" | |
| 256 VALIGN="top" | |
| 257 >SDL_keysym</TD | |
| 258 ></TR | |
| 259 ></TABLE | |
| 260 ></DIV | |
| 261 ></BODY | |
| 262 ></HTML | |
| 263 > |