📄 xlookupstring.html
字号:
<HTML><HEAD><TITLE>Xlib Programming Manual: XLookupString</TITLE></HEAD><BODY><H1 ALIGN=center>XLookupString</H1><H2>Syntax</H2><!.IN "XLookupString" "" "@DEF@"><CODE><PRE>int XLookupString(<B>event_struct</B>, <B>buffer_return</B>, <B>bytes_buffer</B>, <B>keysym_return</B>, <B>status_in_out</B>) <A HREF="../events/keyboard-pointer/keyboard-pointer.html#XKeyEvent">XKeyEvent</A> *<B>event_struct</B>; char *<B>buffer_return</B>; int <B>bytes_buffer</B>; <A HREF="../input/keyboard-encoding.html#KeySym">KeySym</A> *<B>keysym_return</B>; XComposeStatus *<B>status_in_out</B>;</PRE></CODE><H2>Arguments</H2><TABLE><TR><TD> <B>event_struct</B><TD> Specifies the key event structure to be used.You can pass<A HREF="../events/keyboard-pointer/keyboard-pointer.html#XKeyEvent">XKeyPressedEvent</A>or<A HREF="../events/keyboard-pointer/keyboard-pointer.html#XKeyEvent">XKeyReleasedEvent</A> .<TR><TD> <B>buffer_return</B><TD> Returns the translated characters.<TR><TD> <B>bytes_buffer</B><TD> Specifies the length of the buffer.No more than bytes_buffer of translation are returned.<TR><TD> <B>keysym_return</B><TD> Returns the KeySym computed from the event if this argument is not NULL.<TR><TD> <B>status_in_out</B><TD> Specifies or returns the <B>XComposeStatus</B> structure or NULL.</TABLE><H2>Description</H2>The<B>XLookupString()</B>function translates a key event to a KeySym and a string.The KeySym is obtained by using the standard interpretation of the<B>Shift</B>,<B>Lock</B>,group, and numlock modifiers as defined in the X Protocol specification.If the KeySym has been rebound (see<B><A HREF="XRebindKeysym.html">XRebindKeysym()</A></B>),the bound string will be stored in the buffer.Otherwise, the KeySym is mapped, if possible, to an ISO Latin-1 characteror (if the Control modifier is on) to an ASCII control character,and that character is stored in the buffer.<B>XLookupString()</B>returns the number of characters that are stored in the buffer.<A NAME="XComposeStatus"></A><P>If present (non-NULL),the<B>XComposeStatus</B>structure records the state,which is private to Xlib,that needs preservation across calls to<B>XLookupString()</B>to implement compose processing.The creation of<B>XComposeStatus</B>structures is implementation dependent;a portable program must pass NULL for this argument.<P><B>XLookupString()</B>depends on the cached keyboard information mentioned in theprevious section, so it is necessary to use<B><A HREF="keyboard/XRefreshKeyboardMapping.html">XRefreshKeyboardMapping()</A></B>to keep this information up-to-date.<H2>See also</H2><B><A HREF="keyboard/XLookupKeysym.html">XLookupKeysym()</A></B>,<B><A HREF="XRebindKeysym.html">XRebindKeysym()</A></B>,<B><A HREF="keyboard/XRefreshKeyboardMapping.html">XRefreshKeyboardMapping()</A></B>,<B><A HREF="keyboard/XStringToKeysym.html">XStringToKeysym()</A></B><A HREF="../events/keyboard-pointer/keyboard-pointer.html#XButtonEvent">XButtonEvent</A>,<A HREF="../events/window-state-change/map.html#XMapEvent">XMapEvent</A>,"<A HREF="latin-keyboard.html">Latin-1 Keyboard Event Functions</A>".<HR><ADDRESS><A HREF="http://tronche.com/">Christophe Tronche</A>, <A HREF="mailto:ch.tronche@computer.org">ch.tronche@computer.org</A></ADDRESS></BODY></HTML>⌨️ 快捷键说明
复制代码
Ctrl + C
搜索代码
Ctrl + F
全屏模式
F11
切换主题
Ctrl + Shift + D
显示快捷键
?
增大字号
Ctrl + =
减小字号
Ctrl + -