282 lines
3.5 KiB
HTML
282 lines
3.5 KiB
HTML
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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
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<HTML><HEAD><TITLE>Man page of XQUERYDEVICESTATE</TITLE>
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</HEAD><BODY>
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<H1>XQUERYDEVICESTATE</H1>
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Section: (3)<BR>Updated: 06/19/2019<BR><A HREF="#index">Index</A>
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<A HREF="/cgi-bin/man/man2html">Return to Main Contents</A><HR>
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<A NAME="lbAB"> </A>
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<H2>NAME</H2>
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XQueryDeviceState - query the state of an extension input device.
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<A NAME="lbAC"> </A>
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<H2>SYNOPSIS</H2>
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<P>
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<PRE>
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#include <<A HREF="file:///usr/include/X11/extensions/XInput.h">X11/extensions/XInput.h</A>>
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</PRE>
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<P>
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<PRE>
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XDeviceState* XQueryDeviceState( Display *display,
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XDevice *device);
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</PRE>
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<P>
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<PRE>
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display
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Specifies the connection to the X server.
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</PRE>
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<P>
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<PRE>
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device
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Specifies the device whose state is to be queried.
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</PRE>
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<A NAME="lbAD"> </A>
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<H2>DESCRIPTION</H2>
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<P>
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<DL COMPACT><DT id="1"><DD>
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<PRE>
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The XQueryDeviceState request queries the state of an input
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device. The current state of keys and buttons (up or down), and
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valuators (current value) on the device is reported by this
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request. Each key or button is represented by a bit in the
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XDeviceState structure that is returned. Valuators on the
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device report 0 if they are reporting relative information, and
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the current value if they are reporting absolute information.
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</PRE>
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</DL>
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<P>
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<DL COMPACT><DT id="2"><DD>
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<PRE>
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XQueryDeviceState can generate a BadDevice error.
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</PRE>
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</DL>
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<P>
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<DL COMPACT><DT id="3"><DD>
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<PRE>
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Structures:
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</PRE>
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</DL>
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<P>
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<DL COMPACT><DT id="4"><DD>
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<PRE>
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The XDeviceState structure contains:
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</PRE>
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</DL>
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<P>
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<DL COMPACT><DT id="5"><DD>
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<PRE>
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typedef struct {
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XID device_id;
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int num_classes;
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XInputClass *data;
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} XDeviceState;
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</PRE>
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</DL>
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<P>
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<DL COMPACT><DT id="6"><DD>
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<PRE>
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The XValuatorState structure contains:
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</PRE>
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</DL>
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<P>
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<DL COMPACT><DT id="7"><DD>
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<PRE>
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typedef struct {
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unsigned char class;
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unsigned char length;
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unsigned char num_valuators;
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unsigned char mode;
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int *valuators;
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} XValuatorState;
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</PRE>
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</DL>
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<P>
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<DL COMPACT><DT id="8"><DD>
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<PRE>
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The XKeyState structure contains:
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</PRE>
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</DL>
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<P>
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<DL COMPACT><DT id="9"><DD>
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<PRE>
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typedef struct {
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unsigned char class;
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unsigned char length;
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short num_keys;
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char keys[32];
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} XKeyState;
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</PRE>
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</DL>
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<P>
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<DL COMPACT><DT id="10"><DD>
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<PRE>
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The XButtonState structure contains:
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</PRE>
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</DL>
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<P>
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<DL COMPACT><DT id="11"><DD>
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<PRE>
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typedef struct {
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unsigned char class;
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unsigned char length;
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short num_buttons;
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char buttons[32];
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} XButtonState;
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</PRE>
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</DL>
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<A NAME="lbAE"> </A>
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<H2>DIAGNOSTICS</H2>
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<P>
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<DL COMPACT><DT id="12"><DD>
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<PRE>
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BadDevice
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An invalid device was specified. The specified device
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does not exist or has not been opened by this client via
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XOpenInputDevice. This error may also occur if some
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other client has caused the specified device to become
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the X keyboard or X pointer device via the
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XChangeKeyboardDevice or XChangePointerDevice requests.
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</PRE>
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</DL>
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<P>
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<HR>
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<A NAME="index"> </A><H2>Index</H2>
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<DL>
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<DT id="13"><A HREF="#lbAB">NAME</A><DD>
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<DT id="14"><A HREF="#lbAC">SYNOPSIS</A><DD>
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<DT id="15"><A HREF="#lbAD">DESCRIPTION</A><DD>
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<DT id="16"><A HREF="#lbAE">DIAGNOSTICS</A><DD>
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</DL>
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<HR>
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This document was created by
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<A HREF="/cgi-bin/man/man2html">man2html</A>,
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using the manual pages.<BR>
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Time: 00:06:01 GMT, March 31, 2021
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</BODY>
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</HTML>
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