XmIsTraversable(3X) X11 SDE 5.4R3.00 XmIsTraversable(3X)
NAME
XmIsTraversable--A function that identifies whether a widget can be
traversed
SYNOPSIS
#include <Xm/Xm.h>
Boolean XmIsTraversable (widget) Widget widget;
DESCRIPTION
XmIsTraversable 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:
⊕ The widget and its ancestors are not being destroyed, are
sensitive, and have a value of True for XmNtraversalOn.
⊕ The widget and its ancestors are realized, managed, and (except
for gadgets) mapped.
⊕ 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 XmNscrollingPolicy is
XmAUTOMATIC and whose XmNtraverseObscuredCallback is not NULL.
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 XmNtraversalOn
resource is True.
widget Specifies the ID of the widget
RETURN VALUE
Returns True if the widget is eligible to receive focus through
keyboard traversal; otherwise, returns False.
RELATED INFORMATION
XmGetVisibility(3X) and XmProcessTraversal(3X).
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