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'\" t
.\" Title: xiquerypointer
.\" Author: [FIXME: author] [see http://docbook.sf.net/el/author]
.\" Generator: DocBook XSL Stylesheets v1.76.1 <http://docbook.sf.net/>
.\" Date: 09/23/2011
.\" Manual: [FIXME: manual]
.\" Source: [FIXME: source]
.\" Language: English
.\"
.TH "XIQUERYPOINTER" "libmansuffix" "09/23/2011" "[FIXME: source]" "[FIXME: manual]"
.\" -----------------------------------------------------------------
.\" * Define some portability stuff
.\" -----------------------------------------------------------------
.\" ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
.\" http://bugs.debian.org/507673
.\" http://lists.gnu.org/archive/html/groff/2009-02/msg00013.html
.\" ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
.ie \n(.g .ds Aq \(aq
.el .ds Aq '
.\" -----------------------------------------------------------------
.\" * set default formatting
.\" -----------------------------------------------------------------
.\" disable hyphenation
.nh
.\" disable justification (adjust text to left margin only)
.ad l
.\" -----------------------------------------------------------------
.\" * MAIN CONTENT STARTS HERE *
.\" -----------------------------------------------------------------
.SH "NAME"
XIQueryPointer \- get device pointer coordinates\&.
.SH "SYNOPSIS"
.sp
.nf
#include <X11/extensions/XInput2\&.h>
.fi
.sp
.nf
Bool XIQueryPointer( Display *display,
int deviceid,
Window win,
Window *root_return,
Window *child_return,
double *root_x_return,
double *root_y_return,
double *win_x_return,
double *win_y_return,
XIButtonState *buttons_return,
XIModifierState *modifiers_return,
XIGroupState *group_return);
.fi
.sp
.nf
buttons_return
Returns the current button state\&.
.fi
.sp
.nf
child_return
Returns the child window that the pointer is located in,
if any\&.
.fi
.sp
.nf
deviceid
Specifies the device to query\&.
.fi
.sp
.nf
display
Specifies the connection to the X server\&.
.fi
.sp
.nf
group_return
Returns the current group state\&.
.fi
.sp
.nf
modifiers_return
Returns the current state of the modifier keys\&.
.fi
.sp
.nf
root_return
Returns the root window that the pointer is in\&.
.fi
.sp
.nf
root_x_return, root_y_return
Return the pointer coordinates relative to the root
window\*(Aqs origin\&.
.fi
.sp
.nf
win
Specifies the window\&.
.fi
.sp
.nf
win_x_return, win_y_return
Return the pointer coordinates relative to the specified
window\&.
.fi
.SH "DESCRIPTION"
.sp
.if n \{\
.RS 4
.\}
.nf
The XIQueryPointer function returns the root window the
device\*(Aqs pointer is logically on and the pointer coordinates
relative to the root window\*(Aqs origin\&. If XIQueryPointer returns
False, the pointer is not on the same screen as the specified
window, and XIQueryPointer returns None to child_return and
zero to win_x_return and win_y_return\&. If XIQueryPointer
returns True, the pointer coordinates returned to win_x_return
and win_y_return are relative to the origin of the specified
window\&. In this case, XIQueryPointer returns the child that
contains the pointer, if any, or else None to child_return\&.
.fi
.if n \{\
.RE
.\}
.sp
.if n \{\
.RS 4
.\}
.nf
XIQueryPointer returns the current logical state of the buttons
buttons_return\&. The keyboard paired with the master pointer is
selected to obtain the data for modifiers_return and
group_return\&.
.fi
.if n \{\
.RE
.\}
.sp
.if n \{\
.RS 4
.\}
.nf
The mask field in buttons_return is dynamically allocated and
must be freed by the caller\&.
.fi
.if n \{\
.RE
.\}
.sp
.if n \{\
.RS 4
.\}
.nf
XIQueryPointer is identical to XQueryPointer but specifies the
device explicitly\&.
.fi
.if n \{\
.RE
.\}
.sp
.if n \{\
.RS 4
.\}
.nf
XIQueryPointer can generate a BadDevice and a BadWindow error\&.
.fi
.if n \{\
.RE
.\}
.SH "DIAGNOSTICS"
.sp
.if n \{\
.RS 4
.\}
.nf
BadDevice
An invalid device was specified\&. The device does not
exist or is not a pointer device\&.
.fi
.if n \{\
.RE
.\}
.sp
.if n \{\
.RS 4
.\}
.nf
BadWindow
A value for a Window argument does not name a defined
window\&.
.fi
.if n \{\
.RE
.\}
.SH "SEE ALSO"
.sp
.if n \{\
.RS 4
.\}
.nf
XQueryPointer(libmansuffix)
.fi
.if n \{\
.RE
.\}
|
