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<HTML><HEAD><TITLE>Xlib Programming Manual: XSetModifierMapping</TITLE></HEAD><BODY><H1 ALIGN=center>XSetModifierMapping</H1><H2>Syntax</H2><!.IN "XSetModifierMapping" "" "@DEF@"><CODE><PRE>int XSetModifierMapping(<B>display</B>, <B>modmap</B>) <A HREF="../display/opening.html#Display">Display</A> *<B>display</B>; <A HREF="keyboard-encoding.html#XModifierKeymap">XModifierKeymap</A> *<B>modmap</B>;</PRE></CODE><H2>Arguments</H2><TABLE><TR><TD> <B>display</B><TD> Specifies the connection to the X server.<TR><TD> <B>modmap</B><TD> Specifies the <A HREF="keyboard-encoding.html#XModifierKeymap">XModifierKeymap</A>structure.</TABLE><H2>Description</H2>The<B>XSetModifierMapping()</B>function specifies the KeyCodes of the keys (if any) that are to be used as modifiers.If it succeeds,the X server generates a<B><A HREF="../events/window-state-change/mapping.html">MappingNotify</A></B>event, and<B>XSetModifierMapping()</B>returns<B>MappingSuccess</B>.X permits at most eight modifier keys.If more than eight are specified in the<A HREF="keyboard-encoding.html#XModifierKeymap">XModifierKeymap</A>structure, a<B>BadLength</B>error results.<P>The modifiermap member of the <A HREF="keyboard-encoding.html#XModifierKeymap">XModifierKeymap</A>structure contains eight sets of max_keypermod KeyCodes, one for each modifier in the order <B>Shift</B>, <B>Lock</B>, <B>Control</B>, <B>Mod1</B>, <B>Mod2</B>, <B>Mod3</B>, <B>Mod4</B>, and <B>Mod5</B>.Only nonzero KeyCodes have meaning in each set, and zero KeyCodes are ignored.In addition, all of the nonzero KeyCodes must be in the range specified by min_keycode and max_keycode in the <A HREF="../display/opening.html#Display">Display</A> structure,or a <B>BadValue</B>error results.<P>An X server can impose restrictions on how modifiers can be changed, for example,if certain keys do not generate up transitions in hardware,if auto-repeat cannot be disabled on certain keys,or if multiple modifier keys are not supported. If some such restriction is violated, the status reply is<B>MappingFailed</B>,and none of the modifiers are changed.If the new KeyCodes specified for a modifier differ from thosecurrently defined and any (current or new) keys for that modifier arein the logically down state, <B>XSetModifierMapping()</B>returns<B>MappingBusy</B>, and none of the modifiers is changed.<P><B>XSetModifierMapping()</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.</TABLE><H2>See also</H2><B><A HREF="XChangeKeyboardMapping.html">XChangeKeyboardMapping()</A></B>,<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="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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