1 <HTML 2 ><HEAD 3 ><TITLE 4 >SDL_GetKeyState</TITLE 5 ><META 6 NAME="GENERATOR" 7 CONTENT="Modular DocBook HTML Stylesheet Version 1.76b+ 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_EventState" 17 HREF="sdleventstate.html"><LINK 18 REL="NEXT" 19 TITLE="SDL_GetModState" 20 HREF="sdlgetmodstate.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 SUMMARY="Header navigation table" 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="sdleventstate.html" 49 ACCESSKEY="P" 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="sdlgetmodstate.html" 63 ACCESSKEY="N" 64 >Next</A 65 ></TD 66 ></TR 67 ></TABLE 68 ><HR 69 ALIGN="LEFT" 70 WIDTH="100%"></DIV 71 ><H1 72 ><A 73 NAME="SDLGETKEYSTATE" 74 ></A 75 >SDL_GetKeyState</H1 76 ><DIV 77 CLASS="REFNAMEDIV" 78 ><A 79 NAME="AEN5686" 80 ></A 81 ><H2 82 >Name</H2 83 >SDL_GetKeyState -- Get a snapshot of the current keyboard state</DIV 84 ><DIV 85 CLASS="REFSYNOPSISDIV" 86 ><A 87 NAME="AEN5689" 88 ></A 89 ><H2 90 >Synopsis</H2 91 ><DIV 92 CLASS="FUNCSYNOPSIS" 93 ><A 94 NAME="AEN5690" 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_GetKeyState</B 108 ></CODE 109 >(int *numkeys);</CODE 110 ></P 111 ><P 112 ></P 113 ></DIV 114 ></DIV 115 ><DIV 116 CLASS="REFSECT1" 117 ><A 118 NAME="AEN5696" 119 ></A 120 ><H2 121 >Description</H2 122 ><P 123 >Gets a snapshot of the current keyboard state. The current state is return as a pointer to an array, the size of this array is stored in <TT 124 CLASS="PARAMETER" 125 ><I 126 >numkeys</I 127 ></TT 128 >. The array is indexed by the <A 129 HREF="sdlkey.html" 130 ><TT 131 CLASS="LITERAL" 132 >SDLK_*</TT 133 ></A 134 > symbols. A value of 1 means the key is pressed and a value of 0 means its not. The pointer returned is a pointer to an internal SDL array and should not be freed by the caller.</P 135 ><DIV 136 CLASS="NOTE" 137 ><BLOCKQUOTE 138 CLASS="NOTE" 139 ><P 140 ><B 141 >Note: </B 142 >Use <A 143 HREF="sdlpumpevents.html" 144 ><TT 145 CLASS="FUNCTION" 146 >SDL_PumpEvents</TT 147 ></A 148 > to update the state array.</P 149 ></BLOCKQUOTE 150 ></DIV 151 ></DIV 152 ><DIV 153 CLASS="REFSECT1" 154 ><A 155 NAME="AEN5706" 156 ></A 157 ><H2 158 >Example</H2 159 ><P 160 ><PRE 161 CLASS="PROGRAMLISTING" 162 >Uint8 *keystate = SDL_GetKeyState(NULL); 163 if ( keystate[SDLK_RETURN] ) printf("Return Key Pressed.\n");</PRE 164 ></P 165 ></DIV 166 ><DIV 167 CLASS="REFSECT1" 168 ><A 169 NAME="AEN5710" 170 ></A 171 ><H2 172 >See Also</H2 173 ><P 174 ><A 175 HREF="sdlkey.html" 176 ><TT 177 CLASS="LITERAL" 178 >SDL Key Symbols</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 194 SUMMARY="Footer navigation table" 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="sdleventstate.html" 206 ACCESSKEY="P" 207 >Prev</A 208 ></TD 209 ><TD 210 WIDTH="34%" 211 ALIGN="center" 212 VALIGN="top" 213 ><A 214 HREF="index.html" 215 ACCESSKEY="H" 216 >Home</A 217 ></TD 218 ><TD 219 WIDTH="33%" 220 ALIGN="right" 221 VALIGN="top" 222 ><A 223 HREF="sdlgetmodstate.html" 224 ACCESSKEY="N" 225 >Next</A 226 ></TD 227 ></TR 228 ><TR 229 ><TD 230 WIDTH="33%" 231 ALIGN="left" 232 VALIGN="top" 233 >SDL_EventState</TD 234 ><TD 235 WIDTH="34%" 236 ALIGN="center" 237 VALIGN="top" 238 ><A 239 HREF="eventfunctions.html" 240 ACCESSKEY="U" 241 >Up</A 242 ></TD 243 ><TD 244 WIDTH="33%" 245 ALIGN="right" 246 VALIGN="top" 247 >SDL_GetModState</TD 248 ></TR 249 ></TABLE 250 ></DIV 251 ></BODY 252 ></HTML 253 >