Mercurial > sdl-ios-xcode
view docs/html/sdlgeteventfilter.html @ 2318:0c653886cce7
HandleEvent() returns done each time it is called. If done was set to 0 the program should quit, but because done is not checked until *all* events are handled a
following event can reset done to 1 and prevent the program from terminating when told to. I fixed the while loop that handles events to check for the state of done
after handling each event. That could leave some events unhandled when the program exits, but it ensures that the program will exit.
author | Bob Pendleton <bob@pendleton.com> |
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date | Wed, 20 Feb 2008 23:27:33 +0000 |
parents | 355632dca928 |
children |
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<HTML ><HEAD ><TITLE >SDL_GetEventFilter</TITLE ><META NAME="GENERATOR" CONTENT="Modular DocBook HTML Stylesheet Version 1.76b+ "><LINK REL="HOME" TITLE="SDL Library Documentation" HREF="index.html"><LINK REL="UP" TITLE="Event Functions." HREF="eventfunctions.html"><LINK REL="PREVIOUS" TITLE="SDL_SetEventFilter" HREF="sdlseteventfilter.html"><LINK REL="NEXT" TITLE="SDL_EventState" HREF="sdleventstate.html"></HEAD ><BODY CLASS="REFENTRY" BGCOLOR="#FFF8DC" TEXT="#000000" LINK="#0000ee" VLINK="#551a8b" ALINK="#ff0000" ><DIV CLASS="NAVHEADER" ><TABLE SUMMARY="Header navigation 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="sdlseteventfilter.html" ACCESSKEY="P" >Prev</A ></TD ><TD WIDTH="80%" ALIGN="center" VALIGN="bottom" ></TD ><TD WIDTH="10%" ALIGN="right" VALIGN="bottom" ><A HREF="sdleventstate.html" ACCESSKEY="N" >Next</A ></TD ></TR ></TABLE ><HR ALIGN="LEFT" WIDTH="100%"></DIV ><H1 ><A NAME="SDLGETEVENTFILTER" ></A >SDL_GetEventFilter</H1 ><DIV CLASS="REFNAMEDIV" ><A NAME="AEN5615" ></A ><H2 >Name</H2 >SDL_GetEventFilter -- Retrieves a pointer to he event filter</DIV ><DIV CLASS="REFSYNOPSISDIV" ><A NAME="AEN5618" ></A ><H2 >Synopsis</H2 ><DIV CLASS="FUNCSYNOPSIS" ><A NAME="AEN5619" ></A ><P ></P ><PRE CLASS="FUNCSYNOPSISINFO" >#include "SDL.h"</PRE ><P ><CODE ><CODE CLASS="FUNCDEF" >SDL_EventFilter <B CLASS="FSFUNC" >SDL_GetEventFilter</B ></CODE >(void);</CODE ></P ><P ></P ></DIV ></DIV ><DIV CLASS="REFSECT1" ><A NAME="AEN5625" ></A ><H2 >Description</H2 ><P >This function retrieces a pointer to the event filter that was previously set using <A HREF="sdlseteventfilter.html" ><TT CLASS="FUNCTION" >SDL_SetEventFilter</TT ></A >. An SDL_EventFilter function is defined as: <PRE CLASS="PROGRAMLISTING" >typedef int (*SDL_EventFilter)(const SDL_Event *event);</PRE ></P ></DIV ><DIV CLASS="REFSECT1" ><A NAME="AEN5631" ></A ><H2 >Return Value</H2 ><P >Returns a pointer to the event filter or <TT CLASS="LITERAL" >NULL</TT > if no filter has been set.</P ></DIV ><DIV CLASS="REFSECT1" ><A NAME="AEN5635" ></A ><H2 >See Also</H2 ><P ><A HREF="sdlevent.html" ><SPAN CLASS="STRUCTNAME" >SDL_Event</SPAN ></A >, <A HREF="sdlseteventfilter.html" ><TT CLASS="FUNCTION" >SDL_SetEventFilter</TT ></A ></P ></DIV ><DIV CLASS="NAVFOOTER" ><HR ALIGN="LEFT" WIDTH="100%"><TABLE SUMMARY="Footer navigation table" WIDTH="100%" BORDER="0" CELLPADDING="0" CELLSPACING="0" ><TR ><TD WIDTH="33%" ALIGN="left" VALIGN="top" ><A HREF="sdlseteventfilter.html" ACCESSKEY="P" >Prev</A ></TD ><TD WIDTH="34%" ALIGN="center" VALIGN="top" ><A HREF="index.html" ACCESSKEY="H" >Home</A ></TD ><TD WIDTH="33%" ALIGN="right" VALIGN="top" ><A HREF="sdleventstate.html" ACCESSKEY="N" >Next</A ></TD ></TR ><TR ><TD WIDTH="33%" ALIGN="left" VALIGN="top" >SDL_SetEventFilter</TD ><TD WIDTH="34%" ALIGN="center" VALIGN="top" ><A HREF="eventfunctions.html" ACCESSKEY="U" >Up</A ></TD ><TD WIDTH="33%" ALIGN="right" VALIGN="top" >SDL_EventState</TD ></TR ></TABLE ></DIV ></BODY ></HTML >