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<HTML><HEAD><TITLE>Xlib Programming Manual: XChangeKeyboardMapping</TITLE></HEAD><BODY><H1 ALIGN=center>XChangeKeyboardMapping</H1><H2>Syntax</H2><!.IN "XChangeKeyboardMapping" "" "@DEF@"><CODE><PRE>XChangeKeyboardMapping(<B>display</B>, <B>first_keycode</B>, <B>keysyms_per_keycode</B>, <B>keysyms</B>, <B>num_codes</B>) <A HREF="../display/opening.html#Display">Display</A> *<B>display</B>; int <B>first_keycode</B>; int <B>keysyms_per_keycode</B>; KeySym *<B>keysyms</B>; int <B>num_codes</B>;</PRE></CODE><H2>Arguments</H2><TABLE><TR><TD> <B>display</B><TD> Specifies the connection to the X server.<TR><TD> <B>first_keycode</B><TD> Specifies the first KeyCode that is to be changed.<TR><TD> <B>keysyms_per_keycode</B><TD> Specifies the number of KeySyms per KeyCode.<TR><TD> <B>keysyms</B><TD> Specifies an array of KeySyms.<TR><TD> <B>num_codes</B><TD> Specifies the number of KeyCodes that are to be changed.</TABLE><H2>Description</H2>The<B>XChangeKeyboardMapping()</B>function defines the symbols for the specified number of KeyCodesstarting with first_keycode.The symbols for KeyCodes outside this range remain unchanged. The number of elements in keysyms must be:<P><BLOCKQUOTE><I>num_codes * keysyms_per_keycode</I></BLOCKQUOTE><P>The specified first_keycode must be greater than or equal to min_keycode returned by<B><A HREF="XDisplayKeycodes.html">XDisplayKeycodes()</A></B>,or a <B>BadValue</B>error results.In addition, the following expression must be less than or equal to max_keycode as returned by<B><A HREF="XDisplayKeycodes.html">XDisplayKeycodes()</A></B>,or a<B>BadValue</B>error results:<P><BLOCKQUOTE><I>first_keycode + num_codes - 1</I></BLOCKQUOTE><P>KeySym number N, counting from zero, for KeyCode K has the following indexin keysyms, counting from zero: <P><BLOCKQUOTE><I>(K - first_keycode) * keysyms_per_keycode + N</I></BLOCKQUOTE><P>The specified keysyms_per_keycode can be chosen arbitrarily by the clientto be large enough to hold all desired symbols. A special KeySym value of <B>NoSymbol</B> should be used to fill in unused elements for individual KeyCodes. It is legal for <B>NoSymbol</B> to appear in nontrailing positionsof the effective list for a KeyCode.<B>XChangeKeyboardMapping()</B>generates a <B><A HREF="../events/window-state-change/mapping.html">MappingNotify</A></B> event.<P>There is no requirement that the X server interpret this mapping. It is merely stored for reading and writing by clients.<P><B>XChangeKeyboardMapping()</B>can generate<B>BadAlloc</B> and<B>BadValue</B> errors.<H2>Diagnostics</H2><TABLE><TR><TD><B>BadAlloc</B><TD> The server failed to allocate the requested source or server memory.<TR><TD><B>BadValue</B><TD> Some numeric value falls outside the range of values accepted by the request. Unless a specific range is specified for an argument, the full range defined by the argument's type is accepted. Any argument defined as a set of alternatives can generate this error.</TABLE><H2>See also</H2><B><A HREF="XDeleteModifiermapEntry.html">XDeleteModifiermapEntry()</A></B>,<B><A HREF="XDisplayKeycodes.html">XDisplayKeycodes()</A></B>,<B><A HREF="../display/XFree.html">XFree()</A></B>,<B><A HREF="XFreeModifiermap.html">XFreeModifiermap()</A></B>,<B><A HREF="XGetKeyboardMapping.html">XGetKeyboardMapping()</A></B>,<B><A HREF="XGetModifierMapping.html">XGetModifierMapping()</A></B>,<B><A HREF="XInsertModifiermapEntry.html">XInsertModifiermapEntry()</A></B>,<B><A HREF="XNewModifiermap.html">XNewModifiermap()</A></B>,<B><A HREF="XSetModifierMapping.html">XSetModifierMapping()</A></B>,<B><A HREF="XSetPointerMapping.html">XSetPointerMapping()</A></B>,"<A HREF="keyboard-encoding.html">Keyboard Encoding</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
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