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<HTML><HEAD><TITLE>SDL_UserEvent</TITLE><METANAME="GENERATOR"CONTENT="Modular DocBook HTML Stylesheet Version 1.76b+"><LINKREL="HOME"TITLE="SDL Library Documentation"HREF="index.html"><LINKREL="UP"TITLE="SDL Event Structures."HREF="eventstructures.html"><LINKREL="PREVIOUS"TITLE="SDL_SysWMEvent"HREF="sdlsyswmevent.html"><LINKREL="NEXT"TITLE="SDL_QuitEvent"HREF="sdlquitevent.html"></HEAD><BODYCLASS="REFENTRY"BGCOLOR="#FFF8DC"TEXT="#000000"LINK="#0000ee"VLINK="#551a8b"ALINK="#ff0000"><DIVCLASS="NAVHEADER"><TABLESUMMARY="Header navigation table"WIDTH="100%"BORDER="0"CELLPADDING="0"CELLSPACING="0"><TR><THCOLSPAN="3"ALIGN="center">SDL Library Documentation</TH></TR><TR><TDWIDTH="10%"ALIGN="left"VALIGN="bottom"><AHREF="sdlsyswmevent.html"ACCESSKEY="P">Prev</A></TD><TDWIDTH="80%"ALIGN="center"VALIGN="bottom"></TD><TDWIDTH="10%"ALIGN="right"VALIGN="bottom"><AHREF="sdlquitevent.html"ACCESSKEY="N">Next</A></TD></TR></TABLE><HRALIGN="LEFT"WIDTH="100%"></DIV><H1><ANAME="SDLUSEREVENT"></A>SDL_UserEvent</H1><DIVCLASS="REFNAMEDIV"><ANAME="AEN4565"></A><H2>Name</H2>SDL_UserEvent -- A user-defined event type</DIV><DIVCLASS="REFSECT1"><ANAME="AEN4568"></A><H2>Structure Definition</H2><PRECLASS="PROGRAMLISTING">typedef struct{ Uint8 type; int code; void *data1; void *data2;} SDL_UserEvent;</PRE></DIV><DIVCLASS="REFSECT1"><ANAME="AEN4571"></A><H2>Structure Data</H2><DIVCLASS="INFORMALTABLE"><ANAME="AEN4573"></A><P></P><TABLEBORDER="0"CLASS="CALSTABLE"><TBODY><TR><TDALIGN="LEFT"VALIGN="TOP"><TTCLASS="STRUCTFIELD"><I>type</I></TT></TD><TDALIGN="LEFT"VALIGN="TOP"><TTCLASS="LITERAL">SDL_USEREVENT</TT> through to <TTCLASS="LITERAL">SDL_NUMEVENTS-1</TT></TD></TR><TR><TDALIGN="LEFT"VALIGN="TOP"><TTCLASS="STRUCTFIELD"><I>code</I></TT></TD><TDALIGN="LEFT"VALIGN="TOP">User defined event code</TD></TR><TR><TDALIGN="LEFT"VALIGN="TOP"><TTCLASS="STRUCTFIELD"><I>data1</I></TT></TD><TDALIGN="LEFT"VALIGN="TOP">User defined data pointer</TD></TR><TR><TDALIGN="LEFT"VALIGN="TOP"><TTCLASS="STRUCTFIELD"><I>data2</I></TT></TD><TDALIGN="LEFT"VALIGN="TOP">User defined data pointer</TD></TR></TBODY></TABLE><P></P></DIV></DIV><DIVCLASS="REFSECT1"><ANAME="AEN4594"></A><H2>Description</H2><P><SPANCLASS="STRUCTNAME">SDL_UserEvent</SPAN> is in the <TTCLASS="STRUCTFIELD"><I>user</I></TT> member of the structure <AHREF="sdlevent.html"><SPANCLASS="STRUCTNAME">SDL_Event</SPAN></A>. This event is unique, it is never created by SDL but only by the user. The event can be pushed onto the event queue using <AHREF="sdlpushevent.html"><TTCLASS="FUNCTION">SDL_PushEvent</TT></A>. The contents of the structure members or completely up to the programmer, the only requirement is that <TTCLASS="STRUCTFIELD"><I>type</I></TT> is a value from <TTCLASS="LITERAL">SDL_USEREVENT</TT> to <TTCLASS="LITERAL">SDL_NUMEVENTS-1</TT> (inclusive).</P></DIV><DIVCLASS="REFSECT1"><ANAME="AEN4606"></A><H2>Examples</H2><P><PRECLASS="PROGRAMLISTING">SDL_Event event;event.type = SDL_USEREVENT;event.user.code = my_event_code;event.user.data1 = significant_data;event.user.data2 = 0;SDL_PushEvent(&event);</PRE></P></DIV><DIVCLASS="REFSECT1"><ANAME="AEN4610"></A><H2>See Also</H2><P><AHREF="sdlevent.html"><SPANCLASS="STRUCTNAME">SDL_Event</SPAN></A>,<AHREF="sdlpushevent.html"><TTCLASS="FUNCTION">SDL_PushEvent</TT></A></P></DIV><DIVCLASS="NAVFOOTER"><HRALIGN="LEFT"WIDTH="100%"><TABLESUMMARY="Footer navigation table"WIDTH="100%"BORDER="0"CELLPADDING="0"CELLSPACING="0"><TR><TDWIDTH="33%"ALIGN="left"VALIGN="top"><AHREF="sdlsyswmevent.html"ACCESSKEY="P">Prev</A></TD><TDWIDTH="34%"ALIGN="center"VALIGN="top"><AHREF="index.html"ACCESSKEY="H">Home</A></TD><TDWIDTH="33%"ALIGN="right"VALIGN="top"><AHREF="sdlquitevent.html"ACCESSKEY="N">Next</A></TD></TR><TR><TDWIDTH="33%"ALIGN="left"VALIGN="top">SDL_SysWMEvent</TD><TDWIDTH="34%"ALIGN="center"VALIGN="top"><AHREF="eventstructures.html"ACCESSKEY="U">Up</A></TD><TDWIDTH="33%"ALIGN="right"VALIGN="top">SDL_QuitEvent</TD></TR></TABLE></DIV></BODY></HTML>⌨️ 快捷键说明
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