Mercurial > sdl-ios-xcode
annotate docs/html/sdlgetmousestate.html @ 1157:baf35853ad54
Date: Mon, 10 Oct 2005 13:09:32 +0300
From: Tommi Kyntola <tommi.kyntola@ray.fi>
To: sdl@libsdl.org
Subject: [SDL] [RFC] get_ticks broken on linux
It uses gettimeofday to calculate the timedifference.
Gettimeofday returns current time which is seldom monotonous.
This breaks SDL timer subsystem. (time callbacks and all that
get borked when the time difference ms is suddenly ~ 2^32)
I posted a message about this earlier but got no response.
Some thoughts on this matter would be appreciated.
(Or even an explanation for the lack of interest.)
A patch below would use the posix timers that have been around
since posix 93 and do provide a good source of monotonous time
on linux boxes (and on few others too).
The following patch is also availabe at:
http://www.hut.fi/u/tkyntola/SDL-1.2.9-clockfix.patch
It's against 1.2.9, but I can easily rediffit against
the cvs branch is needed.
cheers,
Tommi Kyntola tommi.kyntola@ray.fi
| author | Ryan C. Gordon <icculus@icculus.org> |
|---|---|
| date | Tue, 11 Oct 2005 18:16:12 +0000 |
| parents | 355632dca928 |
| children |
| rev | line source |
|---|---|
| 0 | 1 <HTML |
| 2 ><HEAD | |
| 3 ><TITLE | |
| 4 >SDL_GetMouseState</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_EnableKeyRepeat" | |
| 17 HREF="sdlenablekeyrepeat.html"><LINK | |
| 18 REL="NEXT" | |
| 19 TITLE="SDL_GetRelativeMouseState" | |
| 20 HREF="sdlgetrelativemousestate.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="sdlenablekeyrepeat.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="sdlgetrelativemousestate.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="SDLGETMOUSESTATE" | |
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74 ></A |
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75 >SDL_GetMouseState</H1 |
| 0 | 76 ><DIV |
| 77 CLASS="REFNAMEDIV" | |
| 78 ><A | |
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79 NAME="AEN5869" |
| 0 | 80 ></A |
| 81 ><H2 | |
| 82 >Name</H2 | |
| 83 >SDL_GetMouseState -- Retrieve the current state of the mouse</DIV | |
| 84 ><DIV | |
| 85 CLASS="REFSYNOPSISDIV" | |
| 86 ><A | |
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87 NAME="AEN5872" |
| 0 | 88 ></A |
| 89 ><H2 | |
| 90 >Synopsis</H2 | |
| 91 ><DIV | |
| 92 CLASS="FUNCSYNOPSIS" | |
| 93 ><A | |
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94 NAME="AEN5873" |
| 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 >Uint8 <B | |
| 106 CLASS="FSFUNC" | |
| 107 >SDL_GetMouseState</B | |
| 108 ></CODE | |
| 109 >(int *x, int *y);</CODE | |
| 110 ></P | |
| 111 ><P | |
| 112 ></P | |
| 113 ></DIV | |
| 114 ></DIV | |
| 115 ><DIV | |
| 116 CLASS="REFSECT1" | |
| 117 ><A | |
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118 NAME="AEN5879" |
| 0 | 119 ></A |
| 120 ><H2 | |
| 121 >Description</H2 | |
| 122 ><P | |
| 123 >The current button state is returned as a button bitmask, which can | |
| 124 be tested using the <TT | |
| 125 CLASS="LITERAL" | |
| 126 >SDL_BUTTON(X)</TT | |
| 127 > macros, and <TT | |
| 128 CLASS="PARAMETER" | |
| 129 ><I | |
| 130 >x</I | |
| 131 ></TT | |
| 132 > and <TT | |
| 133 CLASS="PARAMETER" | |
| 134 ><I | |
| 135 >y</I | |
| 136 ></TT | |
| 137 > are set to the | |
| 138 current mouse cursor position. You can pass <TT | |
| 139 CLASS="LITERAL" | |
| 140 >NULL</TT | |
| 141 > for either <TT | |
| 142 CLASS="PARAMETER" | |
| 143 ><I | |
| 144 >x</I | |
| 145 ></TT | |
| 146 > or <TT | |
| 147 CLASS="PARAMETER" | |
| 148 ><I | |
| 149 >y</I | |
| 150 ></TT | |
| 151 >.</P | |
| 152 ></DIV | |
| 153 ><DIV | |
| 154 CLASS="REFSECT1" | |
| 155 ><A | |
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156 NAME="AEN5888" |
| 0 | 157 ></A |
| 158 ><H2 | |
| 159 >Example</H2 | |
| 160 ><PRE | |
| 161 CLASS="PROGRAMLISTING" | |
| 162 >SDL_PumpEvents(); | |
| 163 if(SDL_GetMouseState(NULL, NULL)&SDL_BUTTON(1)) | |
| 164 printf("Mouse Button 1(left) is pressed.\n");</PRE | |
| 165 ></DIV | |
| 166 ><DIV | |
| 167 CLASS="REFSECT1" | |
| 168 ><A | |
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169 NAME="AEN5891" |
| 0 | 170 ></A |
| 171 ><H2 | |
| 172 >See Also</H2 | |
| 173 ><P | |
| 174 ><A | |
| 175 HREF="sdlgetrelativemousestate.html" | |
| 176 ><TT | |
| 177 CLASS="FUNCTION" | |
| 178 >SDL_GetRelativeMouseState</TT | |
| 179 ></A | |
| 180 >, | |
| 181 <A | |
| 182 HREF="sdlpumpevents.html" | |
| 183 ><TT | |
| 184 CLASS="FUNCTION" | |
| 185 >SDL_PumpEvents</TT | |
| 186 ></A | |
| 187 ></P | |
| 188 ></DIV | |
| 189 ><DIV | |
| 190 CLASS="NAVFOOTER" | |
| 191 ><HR | |
| 192 ALIGN="LEFT" | |
| 193 WIDTH="100%"><TABLE | |
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194 SUMMARY="Footer navigation table" |
| 0 | 195 WIDTH="100%" |
| 196 BORDER="0" | |
| 197 CELLPADDING="0" | |
| 198 CELLSPACING="0" | |
| 199 ><TR | |
| 200 ><TD | |
| 201 WIDTH="33%" | |
| 202 ALIGN="left" | |
| 203 VALIGN="top" | |
| 204 ><A | |
| 205 HREF="sdlenablekeyrepeat.html" | |
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206 ACCESSKEY="P" |
| 0 | 207 >Prev</A |
| 208 ></TD | |
| 209 ><TD | |
| 210 WIDTH="34%" | |
| 211 ALIGN="center" | |
| 212 VALIGN="top" | |
| 213 ><A | |
| 214 HREF="index.html" | |
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215 ACCESSKEY="H" |
| 0 | 216 >Home</A |
| 217 ></TD | |
| 218 ><TD | |
| 219 WIDTH="33%" | |
| 220 ALIGN="right" | |
| 221 VALIGN="top" | |
| 222 ><A | |
| 223 HREF="sdlgetrelativemousestate.html" | |
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803
355632dca928
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224 ACCESSKEY="N" |
| 0 | 225 >Next</A |
| 226 ></TD | |
| 227 ></TR | |
| 228 ><TR | |
| 229 ><TD | |
| 230 WIDTH="33%" | |
| 231 ALIGN="left" | |
| 232 VALIGN="top" | |
| 233 >SDL_EnableKeyRepeat</TD | |
| 234 ><TD | |
| 235 WIDTH="34%" | |
| 236 ALIGN="center" | |
| 237 VALIGN="top" | |
| 238 ><A | |
| 239 HREF="eventfunctions.html" | |
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240 ACCESSKEY="U" |
| 0 | 241 >Up</A |
| 242 ></TD | |
| 243 ><TD | |
| 244 WIDTH="33%" | |
| 245 ALIGN="right" | |
| 246 VALIGN="top" | |
| 247 >SDL_GetRelativeMouseState</TD | |
| 248 ></TR | |
| 249 ></TABLE | |
| 250 ></DIV | |
| 251 ></BODY | |
| 252 ></HTML | |
| 253 > |