Mercurial > sdl-ios-xcode
view docs/html/sdlpollevent.html @ 211:0cc95f442f3a
If we're looking at the /dev/input event devices, and we found
at least one, then we don't want to look at the input joystick
devices, since they're built on top of devices that we've already
seen, so we're done.
author | Sam Lantinga <slouken@libsdl.org> |
---|---|
date | Mon, 22 Oct 2001 21:34:50 +0000 |
parents | e5bc29de3f0a |
children | 355632dca928 |
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<HTML ><HEAD ><TITLE >SDL_PollEvent</TITLE ><META NAME="GENERATOR" CONTENT="Modular DocBook HTML Stylesheet Version 1.64 "><LINK REL="HOME" TITLE="SDL Library Documentation" HREF="index.html"><LINK REL="UP" TITLE="Event Functions." HREF="eventfunctions.html"><LINK REL="PREVIOUS" TITLE="SDL_PeepEvents" HREF="sdlpeepevents.html"><LINK REL="NEXT" TITLE="SDL_WaitEvent" HREF="sdlwaitevent.html"></HEAD ><BODY CLASS="REFENTRY" BGCOLOR="#FFF8DC" TEXT="#000000" LINK="#0000ee" VLINK="#551a8b" ALINK="#ff0000" ><DIV CLASS="NAVHEADER" ><TABLE WIDTH="100%" BORDER="0" CELLPADDING="0" CELLSPACING="0" ><TR ><TH COLSPAN="3" ALIGN="center" >SDL Library Documentation</TH ></TR ><TR ><TD WIDTH="10%" ALIGN="left" VALIGN="bottom" ><A HREF="sdlpeepevents.html" >Prev</A ></TD ><TD WIDTH="80%" ALIGN="center" VALIGN="bottom" ></TD ><TD WIDTH="10%" ALIGN="right" VALIGN="bottom" ><A HREF="sdlwaitevent.html" >Next</A ></TD ></TR ></TABLE ><HR ALIGN="LEFT" WIDTH="100%"></DIV ><H1 ><A NAME="SDLPOLLEVENT" >SDL_PollEvent</A ></H1 ><DIV CLASS="REFNAMEDIV" ><A NAME="AEN5084" ></A ><H2 >Name</H2 >SDL_PollEvent -- Polls for currently pending events.</DIV ><DIV CLASS="REFSYNOPSISDIV" ><A NAME="AEN5087" ></A ><H2 >Synopsis</H2 ><DIV CLASS="FUNCSYNOPSIS" ><A NAME="AEN5088" ></A ><P ></P ><PRE CLASS="FUNCSYNOPSISINFO" >#include "SDL.h"</PRE ><P ><CODE ><CODE CLASS="FUNCDEF" >int <B CLASS="FSFUNC" >SDL_PollEvent</B ></CODE >(SDL_Event *event);</CODE ></P ><P ></P ></DIV ></DIV ><DIV CLASS="REFSECT1" ><A NAME="AEN5094" ></A ><H2 >Description</H2 ><P >Polls for currently pending events, and returns <SPAN CLASS="RETURNVALUE" >1</SPAN > if there are any pending events, or <SPAN CLASS="RETURNVALUE" >0</SPAN > if there are none available. </P ><P >If <TT CLASS="PARAMETER" ><I >event</I ></TT > is not <TT CLASS="LITERAL" >NULL</TT >, the next event is removed from the queue and stored in that area.</P ></DIV ><DIV CLASS="REFSECT1" ><A NAME="AEN5102" ></A ><H2 >Examples</H2 ><P ><PRE CLASS="PROGRAMLISTING" >SDL_Event event; /* Event structure */ . . . /* Check for events */ while(SDL_PollEvent(&event)){ /* Loop until there are no events left on the queue */ switch(event.type){ /* Process the appropiate event type */ case SDL_KEYDOWN: /* Handle a KEYDOWN event */ printf("Oh! Key press\n"); break; case SDL_MOUSEMOTION: . . . default: /* Report an unhandled event */ printf("I don't know what this event is!\n"); } }</PRE ></P ></DIV ><DIV CLASS="REFSECT1" ><A NAME="AEN5106" ></A ><H2 >See Also</H2 ><P ><A HREF="sdlevent.html" ><SPAN CLASS="STRUCTNAME" >SDL_Event</SPAN ></A >, <A HREF="sdlwaitevent.html" ><TT CLASS="FUNCTION" >SDL_WaitEvent</TT ></A >, <A HREF="sdlpeepevents.html" ><TT CLASS="FUNCTION" >SDL_PeepEvents</TT ></A ></P ></DIV ><DIV CLASS="NAVFOOTER" ><HR ALIGN="LEFT" WIDTH="100%"><TABLE WIDTH="100%" BORDER="0" CELLPADDING="0" CELLSPACING="0" ><TR ><TD WIDTH="33%" ALIGN="left" VALIGN="top" ><A HREF="sdlpeepevents.html" >Prev</A ></TD ><TD WIDTH="34%" ALIGN="center" VALIGN="top" ><A HREF="index.html" >Home</A ></TD ><TD WIDTH="33%" ALIGN="right" VALIGN="top" ><A HREF="sdlwaitevent.html" >Next</A ></TD ></TR ><TR ><TD WIDTH="33%" ALIGN="left" VALIGN="top" >SDL_PeepEvents</TD ><TD WIDTH="34%" ALIGN="center" VALIGN="top" ><A HREF="eventfunctions.html" >Up</A ></TD ><TD WIDTH="33%" ALIGN="right" VALIGN="top" >SDL_WaitEvent</TD ></TR ></TABLE ></DIV ></BODY ></HTML >