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'\" t
...\" ObjectAP.sgm /main/8 1996/09/08 20:54:48 rws $
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.TH "XmObjectAtPoint" "library call"
.SH "NAME"
\fBXmObjectAtPoint\fP \(em A toolkit function that determines which child intersects or comes closest to a specified point
.iX "XmObjectAtPoint"
.SH "SYNOPSIS"
.PP
.nf
#include <Xm/Xm\&.h>
\fBWidget \fBXmObjectAtPoint\fP\fR(
\fBWidget \fBwidget\fR\fR,
\fBPosition \fBx\fR\fR,
\fBPosition \fBy\fR\fR);
.fi
.SH "DESCRIPTION"
.PP
\fBXmObjectAtPoint\fP searches the child list of the specified
manager \fIwidget\fP and returns the child most closely associated
with the specified \fIx\fP,\fIy\fP coordinate pair\&.
.PP
For the typical Motif manager \fIwidget\fP, \fBXmObjectAtPoint\fP
uses the following rules to determine the returned object:
.IP " \(bu" 6
If one child intersects \fIx,y\fP, \fBXmObjectAtPoint\fP
returns the widget ID of that child\&.
.IP " \(bu" 6
If more than one child intersects \fIx,y\fP,
\fBXmObjectAtPoint\fP returns the widget ID of the visible child\&.
.IP " \(bu" 6
If no child intersects \fIx\fP,\fIy\fP, \fBXmObjectAtPoint\fP
returns NULL\&.
.PP
The preceding rules are only general\&. In fact, each manager
\fIwidget\fP is free to define "most closely associated"
as it desires\&.
For example, if no child intersects \fIx,y\fP, a manager
might return the child closest to \fIx,y\fP\&.
.IP "\fIwidget\fP" 10
Specifies a manager widget\&.
.IP "\fIx\fP" 10
Specifies the x-coordinate about which you are seeking child
information\&. The x-coordinate must be specified in pixels,
relative to the left side of \fImanager\fP\&.
.IP "\fIy\fP" 10
Specifies the y-coordinate about which you are seeking child
information\&. The y-coordinate must be specified in pixels,
relative to the top side of \fImanager\fP\&.
.SH "RETURN"
.PP
Returns the child of \fImanager\fP most closely associated
with \fIx,y\fP\&.
If none of its children are sufficiently associated with \fIx,y\fP,
returns NULL\&.
.SH "RELATED"
.PP
\fBXmManager\fP(3)\&.
...\" created by instant / docbook-to-man, Sun 22 Dec 1996, 20:27
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