261 lines
3.4 KiB
HTML
261 lines
3.4 KiB
HTML
<HTML
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><HEAD
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><TITLE
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>SDL_PollEvent</TITLE
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NAME="GENERATOR"
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CONTENT="Modular DocBook HTML Stylesheet Version 1.64
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>SDL Library Documentation</TH
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><H1
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><A
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NAME="SDLPOLLEVENT"
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>SDL_PollEvent</A
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></H1
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><DIV
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CLASS="REFNAMEDIV"
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><A
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NAME="AEN4929"
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></A
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><H2
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>Name</H2
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>SDL_PollEvent -- Polls for currently pending events.</DIV
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><DIV
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CLASS="REFSYNOPSISDIV"
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><A
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NAME="AEN4932"
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></A
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><H2
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>Synopsis</H2
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><DIV
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CLASS="FUNCSYNOPSIS"
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><A
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NAME="AEN4933"
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></A
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><P
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></P
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><PRE
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CLASS="FUNCSYNOPSISINFO"
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>#include "SDL.h"</PRE
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><P
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><CODE
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><CODE
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CLASS="FUNCDEF"
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>int <B
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CLASS="FSFUNC"
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>SDL_PollEvent</B
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></CODE
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>(SDL_Event *event);</CODE
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></P
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><P
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></P
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></DIV
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></DIV
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><DIV
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CLASS="REFSECT1"
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><A
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NAME="AEN4939"
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></A
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><H2
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>Description</H2
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><P
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>Polls for currently pending events, and returns <SPAN
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CLASS="RETURNVALUE"
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>1</SPAN
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>
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if there are any pending events, or <SPAN
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CLASS="RETURNVALUE"
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>0</SPAN
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> if there
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are none available. </P
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><P
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>If <TT
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CLASS="PARAMETER"
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><I
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>event</I
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></TT
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> is not <TT
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CLASS="LITERAL"
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>NULL</TT
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>, the next
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event is removed from the queue and stored in that area.</P
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></DIV
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><DIV
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CLASS="REFSECT1"
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><A
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NAME="AEN4947"
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></A
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><H2
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>Examples</H2
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><P
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><PRE
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CLASS="PROGRAMLISTING"
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>SDL_Event event; /* Event structure */
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.
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.
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.
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/* Check for events */
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while(SDL_PollEvent(&event)){ /* Loop until there are no events left on the queue */
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switch(event.type){ /* Process the appropiate event type */
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case SDL_KEYDOWN: /* Handle a KEYDOWN event */
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printf("Oh! Key press\n");
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break;
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case SDL_MOUSEMOTION:
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.
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.
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.
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default: /* Report an unhandled event */
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printf("I don't know what this event is!\n");
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}
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}</PRE
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></P
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></DIV
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><DIV
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CLASS="REFSECT1"
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><A
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NAME="AEN4951"
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></A
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><H2
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>See Also</H2
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><P
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><A
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HREF="sdlevent.html"
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><SPAN
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CLASS="STRUCTNAME"
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>SDL_Event</SPAN
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></A
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>,
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<A
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HREF="sdlwaitevent.html"
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><TT
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CLASS="FUNCTION"
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>SDL_WaitEvent</TT
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></A
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>,
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<A
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HREF="sdlpeepevents.html"
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><TT
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CLASS="FUNCTION"
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>SDL_PeepEvents</TT
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></A
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></P
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WIDTH="33%"
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ALIGN="left"
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VALIGN="top"
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><A
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HREF="sdlpeepevents.html"
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>Prev</A
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></TD
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WIDTH="34%"
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ALIGN="center"
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VALIGN="top"
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HREF="index.html"
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>Home</A
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>Next</A
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><TD
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WIDTH="33%"
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ALIGN="left"
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VALIGN="top"
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>SDL_PeepEvents</TD
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><TD
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WIDTH="34%"
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ALIGN="center"
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VALIGN="top"
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><A
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HREF="eventfunctions.html"
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>Up</A
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><TD
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WIDTH="33%"
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ALIGN="right"
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VALIGN="top"
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>SDL_WaitEvent</TD
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></TR
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> |