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'\" t
...\" IsTraver.sgm /main/8 1996/09/08 20:49:25 rws $
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.TH "XmIsTraversable" "library call"
.SH "NAME"
\fBXmIsTraversable\fP \(em A function that identifies whether a widget can
be traversed
.iX "XmIsTraversable"
.SH "SYNOPSIS"
.PP
.nf
#include <Xm/Xm\&.h>
\fBBoolean \fBXmIsTraversable\fP\fR(
\fBWidget \fBwidget\fR\fR);
.fi
.SH "DESCRIPTION"
.PP
\fBXmIsTraversable\fP determines whether the specified widget is
eligible to receive focus through keyboard traversal\&.
In general, a widget is eligible to receive focus when all of the
following conditions are true:
.IP " \(bu" 6
The widget and its ancestors are not being destroyed, are sensitive, and
have a value of True for \fBXmNtraversalOn\fP\&.
.IP " \(bu" 6
The widget and its ancestors are realized, managed, and (except for
gadgets) mapped\&.
If an application unmaps a \fIwidget\fP that has its
\fBXmNmappedWhenManaged\fP resource set to True, the return value
is undefined\&.
.IP " \(bu" 6
Some part of the widget\&'s rectangular area is unobscured by the widget\&'s
ancestors, or some part of the widget\&'s rectangular area is inside the
work window (but possibly outside the clip window) of a ScrolledWindow
whose \fBXmNscrollingPolicy\fP is \fBXmAUTOMATIC\fP and whose
\fBXmNtraverseObscuredCallback\fP is not NULL\&.
.PP
Some widgets may not be eligible to receive focus even if they meet all
these conditions\&.
For example, most managers cannot receive focus through keyboard traversal\&.
Some widgets may be eligible to receive focus under particular
conditions\&.
For example, a DrawingArea is eligible to receive focus if it meets the
conditions above and has no child whose \fBXmNtraversalOn\fP resource is
True\&.
.PP
Note that when all widgets in a shell hierarchy have been made
untraversable, they are considered to have lost focus\&. When a
widget in this hierarchy is made traversable again, it regains focus\&.
.PP
\fBXmIsTraversable\fP may return unexpected results when \fIwidget\fP
or its ancestors are overlapped by their siblings\&.
.IP "\fIwidget\fP" 10
Specifies the ID of the widget
.SH "RETURN"
.PP
Returns True if the widget is eligible to receive focus through keyboard
traversal; otherwise, returns False\&.
.SH "RELATED"
.PP
\fBXmGetVisibility\fP(3) and \fBXmProcessTraversal\fP(3)\&.
...\" created by instant / docbook-to-man, Sun 22 Dec 1996, 20:25
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