NAME

       XmOutline — The Outline widget class "XmOutline" "widget class" "Outline"

SYNOPSIS

       #include <Xm/Outline.h>

DESCRIPTION

       The  Outline  widget  is  a  container  that  shows  the relationship of its children in a
       graphical tree-like format. Each child of the Outline widget is a  node  in  the  Outline.
       The parent-child relationships between these nodes are completely distinct from the widget
       hierarchy. The hierarchy of nodes is created by specifying the tree "parent" of each  node
       as  a  constraint  resource. If a node's parent is NULL then it is assumed to be a root of
       the tree. Although each widget can only have  one  parent,  the  Outline  widget  supports
       adding more than one "root" node to a single Outline.

       Note:  The  Outline  widget  assumes  that  it will be totally responsible for mapping and
       unmapping its children.  Therefore  no  child  of  this  widget  should  ever  modify  its
       mappedWhenManaged  resource.  If  a  child  does  modify  this  resource  the  behavior is
       undefined.

   User Interaction
       Each node in the outline can have one of four  states:  open,  closed,  always  open,  and
       hidden.  The  state  of  a  node  changes  how it appears to the user and what actions are
       available to the user.

       Open           This node will have an open folder shown to its left that may  be  selected
                      by  the  user  to  close this node. When a node is open all of its children
                      will be visible to the user.

       Closed         This node will have a closed folder shown to its left that may be  selected
                      by  the  user to open this node. When a node is closed none of its children
                      will be visible to the user.

       Always Open    This node will have no folder  button  associated  with  it.   All  of  its
                      children will be visible to the user.

       Hidden         This node will not be shown to the user and all of its children will appear
                      and act exactly as if they were children of this  node's  parent.  It  will
                      appear to the user as if this node does not exist.

       To  maintain  consistency  of  the user interface we have found that it is best to use the
       node state "Always Open" for nodes with no children. This way the user  will  only  see  a
       folder button next to a node that has children to display. A folder button associated with
       a node that has no children has no defined semantics.

   Classes
       Outline inherits behavior and resources from the Core, Composite,  Constraint,  XmManager,
       and XmHierarchy  classes.

       The class pointer is xmOutlineWidgetClass.

       The class name is XmOutline.

   New Resources
       The  following  table  defines a set of widget resources used by the programmer to specify
       data. The programmer can also set the resource values for the  inherited  classes  to  set
       attributes  for  this  widget. To reference a resource by name or by class in a .Xdefaults
       file, remove the XmN or XmC prefix and use the remaining letters. To specify  one  of  the
       defined  values  for  a  resource  in  a .Xdefaults file, remove the Xm prefix and use the
       remaining letters (in either lowercase or uppercase, but include any  underscores  between
       words).   The  codes  in  the  access  column indicate if the given resource can be set at
       creation time (C), set by using XtSetValues (S), retrieved by using XtGetValues (G), or is
       not applicable (N/A).

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