100 lines
2.7 KiB
Groff
100 lines
2.7 KiB
Groff
.\"
|
|
.\" $XFree86: xc/doc/man/Xi/XQueryDv.man,v 1.2 2001/01/27 18:20:21 dawes Exp $
|
|
.\"
|
|
.\"
|
|
.\" Copyright ([\d,\s]*) by Hewlett-Packard Company, Ardent Computer,
|
|
.\"
|
|
.\" Permission to use, copy, modify, distribute, and sell this documentation
|
|
.\" for any purpose and without fee is hereby granted, provided that the above
|
|
.\" copyright notice and this permission notice appear in all copies.
|
|
.\" Ardent, and Hewlett-Packard make no representations about the
|
|
.\" suitability for any purpose of the information in this document. It is
|
|
.\" provided \`\`as is'' without express or implied warranty.
|
|
.\"
|
|
.\" $Xorg: XQueryDv.man,v 1.3 2000/08/17 19:41:56 cpqbld Exp $
|
|
.ds xL Programming with Xlib
|
|
.TH XQueryDeviceState __LIB_MAN_SUFFIX__ __xorgversion__ "X FUNCTIONS"
|
|
.SH NAME
|
|
XQueryDeviceState \- query the state of an extension input device.
|
|
.SH SYNTAX
|
|
.HP
|
|
int XQueryDeviceState\^(\^Display *\fIdisplay\fP\^, XDevice *\fIdevice\fP\^);
|
|
.SH ARGUMENTS
|
|
.TP 12
|
|
.I display
|
|
Specifies the connection to the X server.
|
|
.TP 12
|
|
.I device
|
|
Specifies the device whose state is to be queried.
|
|
.SH DESCRIPTION
|
|
The
|
|
\fIXQueryDeviceState\fP
|
|
request queries the state of an input device. The current state of
|
|
keys and buttons (up or down), and valuators (current value) on the device
|
|
is reported by this request. Each key or button is represented by a bit
|
|
in the \fIXDeviceState\fP structure that is returned. Valuators on the
|
|
device report 0 if they are reporting relative information, and the
|
|
current value if they are reporting absolute information.
|
|
.LP
|
|
\fIXQueryDeviceState\fP
|
|
can generate a \fIBadDevice\fP error.
|
|
.SH STRUCTURES
|
|
The
|
|
\fIXDeviceState\fP
|
|
structure contains:
|
|
.LP
|
|
.nf
|
|
typedef struct {
|
|
XID device_id;
|
|
int num_classes;
|
|
XInputClass *data;
|
|
} XDeviceState;
|
|
.fi
|
|
.LP
|
|
The
|
|
\fIXValuatorState\fP
|
|
structure contains:
|
|
.LP
|
|
.nf
|
|
typedef struct {
|
|
unsigned char class;
|
|
unsigned char length;
|
|
unsigned char num_valuators;
|
|
unsigned char mode;
|
|
int *valuators;
|
|
} XValuatorState;
|
|
.fi
|
|
.LP
|
|
The \fIXKeyState\fP structure contains:
|
|
.LP
|
|
.nf
|
|
typedef struct {
|
|
unsigned char class;
|
|
unsigned char length;
|
|
short num_keys;
|
|
char keys[32];
|
|
} XKeyState;
|
|
.fi
|
|
.LP
|
|
The \fIXButtonState\fP structure contains:
|
|
.LP
|
|
.nf
|
|
typedef struct {
|
|
unsigned char class;
|
|
unsigned char length;
|
|
short num_buttons;
|
|
char buttons[32];
|
|
} XButtonState;
|
|
.fi
|
|
.SH DIAGNOSTICS
|
|
.TP 12
|
|
\fIBadDevice\fP
|
|
An invalid device was specified. The specified device does not exist or has
|
|
not been opened by this client via \fIXOpenInputDevice\fP. This error may
|
|
also occur if some other client has caused the specified device to become
|
|
the X keyboard or X pointer device via the \fIXChangeKeyboardDevice\fP or
|
|
\fIXChangePointerDevice\fP requests.
|
|
.SH "SEE ALSO"
|
|
.br
|
|
\fI\*(xL\fP
|