XmIsTraversable(3)

NAME

   XmIsTraversable  ---  A  function that identifies whether a widget can be
   traversed "XmIsTraversable"

SYNOPSIS

   #include <Xm/Xm.h>
   Boolean XmIsTraversable(
   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.  If an application unmaps a widget that has
         its XmNmappedWhenManaged resource set to True, the  return  value
         is undefined.

      *  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.

   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.

   XmIsTraversable may  return  unexpected  results  when  widget  or  its
   ancestors are overlapped by their siblings.

   widget    Specifies the ID of the widget

RETURN

   Returns  True  if  the  widget  is  eligible  to  receive focus through
   keyboard traversal; otherwise, returns False.

RELATED

   XmGetVisibility(3) and XmProcessTraversal(3).

                                                        XmIsTraversable(3)

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