📄 sdlkeyboardevent.html

📁 VC5.6.7的一个扩展库。跟DirectX的功能差不多。
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<HTML><HEAD><TITLE>SDL_KeyboardEvent</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_ActiveEvent"HREF="sdlactiveevent.html"><LINKREL="NEXT"TITLE="SDL_MouseMotionEvent"HREF="sdlmousemotionevent.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="sdlactiveevent.html"ACCESSKEY="P">Prev</A></TD><TDWIDTH="80%"ALIGN="center"VALIGN="bottom"></TD><TDWIDTH="10%"ALIGN="right"VALIGN="bottom"><AHREF="sdlmousemotionevent.html"ACCESSKEY="N">Next</A></TD></TR></TABLE><HRALIGN="LEFT"WIDTH="100%"></DIV><H1><ANAME="SDLKEYBOARDEVENT"></A>SDL_KeyboardEvent</H1><DIVCLASS="REFNAMEDIV"><ANAME="AEN4011"></A><H2>Name</H2>SDL_KeyboardEvent&nbsp;--&nbsp;Keyboard event structure</DIV><DIVCLASS="REFSECT1"><ANAME="AEN4014"></A><H2>Structure Definition</H2><PRECLASS="PROGRAMLISTING">typedef struct{  Uint8 type;  Uint8 state;  SDL_keysym keysym;} SDL_KeyboardEvent;</PRE></DIV><DIVCLASS="REFSECT1"><ANAME="AEN4017"></A><H2>Structure Data</H2><DIVCLASS="INFORMALTABLE"><ANAME="AEN4019"></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_KEYDOWN</TT> or <TTCLASS="LITERAL">SDL_KEYUP</TT></TD></TR><TR><TDALIGN="LEFT"VALIGN="TOP"><TTCLASS="STRUCTFIELD"><I>state</I></TT></TD><TDALIGN="LEFT"VALIGN="TOP"><TTCLASS="LITERAL">SDL_PRESSED</TT> or <TTCLASS="LITERAL">SDL_RELEASED</TT></TD></TR><TR><TDALIGN="LEFT"VALIGN="TOP"><TTCLASS="STRUCTFIELD"><I>keysym</I></TT></TD><TDALIGN="LEFT"VALIGN="TOP">Contains key press information</TD></TR></TBODY></TABLE><P></P></DIV></DIV><DIVCLASS="REFSECT1"><ANAME="AEN4038"></A><H2>Description</H2><P><SPANCLASS="STRUCTNAME">SDL_KeyboardEvent</SPAN> is a member of the <AHREF="sdlevent.html"><SPANCLASS="STRUCTNAME">SDL_Event</SPAN></A> union and is used when an event of type <TTCLASS="LITERAL">SDL_KEYDOWN</TT> or <TTCLASS="LITERAL">SDL_KEYUP</TT> is reported.</P><P>The <TTCLASS="STRUCTFIELD"><I>type</I></TT> and <TTCLASS="STRUCTFIELD"><I>state</I></TT> actually report the same information, they just use different values to do it! A keyboard event occurs when a key is released (<TTCLASS="STRUCTFIELD"><I>type</I></TT>=<TTCLASS="LITERAL">SDK_KEYUP</TT> or <TTCLASS="STRUCTFIELD"><I>state</I></TT>=<TTCLASS="LITERAL">SDL_RELEASED</TT>) and when a key is pressed (<TTCLASS="STRUCTFIELD"><I>type</I></TT>=<TTCLASS="LITERAL">SDL_KEYDOWN</TT> or <TTCLASS="STRUCTFIELD"><I>state</I></TT>=<TTCLASS="LITERAL">SDL_PRESSED</TT>). The information on what key was pressed or released is in the <AHREF="sdlkeysym.html"><SPANCLASS="STRUCTNAME">keysym</SPAN></A> structure.</P><DIVCLASS="NOTE"><BLOCKQUOTECLASS="NOTE"><P><B>Note: </B>Repeating <TTCLASS="LITERAL">SDL_KEYDOWN</TT> events will occur if key repeat is enabled (see <AHREF="sdlenablekeyrepeat.html"><TTCLASS="FUNCTION">SDL_EnableKeyRepeat</TT></A>).</P></BLOCKQUOTE></DIV></DIV><DIVCLASS="REFSECT1"><ANAME="AEN4064"></A><H2>See Also</H2><P><AHREF="sdlevent.html"><SPANCLASS="STRUCTNAME">SDL_Event</SPAN></A>,<AHREF="sdlkeysym.html"><SPANCLASS="STRUCTNAME">SDL_keysym</SPAN></A>,<AHREF="sdlenablekeyrepeat.html"><TTCLASS="FUNCTION">SDL_EnableKeyRepeat</TT></A>,<AHREF="sdlenableunicode.html"><TTCLASS="FUNCTION">SDL_EnableUNICODE</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="sdlactiveevent.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="sdlmousemotionevent.html"ACCESSKEY="N">Next</A></TD></TR><TR><TDWIDTH="33%"ALIGN="left"VALIGN="top">SDL_ActiveEvent</TD><TDWIDTH="34%"ALIGN="center"VALIGN="top"><AHREF="eventstructures.html"ACCESSKEY="U">Up</A></TD><TDWIDTH="33%"ALIGN="right"VALIGN="top">SDL_MouseMotionEvent</TD></TR></TABLE></DIV></BODY></HTML>
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