XmOutline man page

XmOutline — The Outline widget class


#include <Xm/Outline.h>


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.


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).

XmOutline Resource Set
Name Class Type Default Access

XmNconnectNodes Boolean Boolean False CSG

XmNindentSpace Dimension Dimension 30 CSG


Specifies whether to draw lines connecting a parent to each of its children nodes.


This resource controls how many pixels divide the outline's levels

Inherited Resources

Outline inherits behavior and resources from the superclasses described in the following tables. For a complete description of each resource, refer to the reference page for that superclass.

XmHierarchy Resource Set
Name Class Type Default Access

XmNautoClose XmCAutoClose Boolean True CSG

XmNcloseFolderPixmap XmCPixmap Pixmap XmUNSPECIFIED_PIXMAP CSG

XmNhorizontalMargin XmCDimension Dimension 2 CSG

XmNnodeStateCallback XmCNodeStateCallback XtCallbackList NULL C

XmNopenFolderPixmap XmCPixmap Pixmap XmUNSPECIFIED_PIXMAP CSG

XmNrefigureMode XmCBoolean Boolean True CSG

XmNverticalMargin XmCDimension Dimension 2 CSG

XmManager Resource Set
Name Class Type Default Access

XmNbottomShadowColor XmCBottomShadowColor Pixel dynamic CSG

XmNbottomShadowPixmap XmCBottomShadowPixmap Pixmap XmUNSPECIFIED_PIXMAP CSG

XmNforeground XmCForeground Pixel dynamic CSG

XmNhelpCallback XmCCallback XtCallbackList NULL C

XmNhighlightColor XmCHighlightColor Pixel dynamic CSG

XmNhighlightPixmap XmCHighlightPixmap Pixmap dynamic CSG

XmNinitialFocus XmCInitialFocus Widget dynamic CSG

XmNlayoutDirection XmCLayoutDirection XmDirection dynamic CG

XmNnavigationType XmCNavigationType XmNavigationType XmTAB_GROUP CSG

XmNpopupHandlerCallback XmCCallback XtCallbackList NULL C

XmNshadowThickness XmCShadowThickness Dimension dynamic CSG

XmNstringDirection XmCStringDirection XmStringDirection dynamic CG

XmNtopShadowColor XmCTopShadowColor Pixel dynamic CSG

XmNtopShadowPixmap XmCTopShadowPixmap Pixmap dynamic CSG

XmNtraversalOn XmCTraversalOn Boolean True CSG

XmNunitType XmCUnitType unsigned char dynamic CSG

XmNuserData XmCUserData XtPointer NULL CSG

Composite Resource Set
Name Class Type Default Access

XmNchildren XmCReadOnly WidgetList NULL G

XmNinsertPosition XmCInsertPosition XtOrderProc NULL CSG

XmNnumChildren XmCReadOnly Cardinal 0 G

Core Resource Set
Name Class Type Default Access

XmNaccelerators XmCAccelerators XtAccelerators dynamic N/A

XmNancestorSensitive XmCSensitive Boolean dynamic G

XmNbackground XmCBackground Pixel dynamic CSG

XmNbackgroundPixmap XmCPixmap Pixmap XmUNSPECIFIED_PIXMAP CSG

XmNborderColor XmCBorderColor Pixel XtDefaultForeground CSG

XmNborderPixmap XmCPixmap Pixmap XmUNSPECIFIED_PIXMAP CSG

XmNborderWidth XmCBorderWidth Dimension 0 CSG

XmNcolormap XmCColormap Colormap dynamic CG

XmNdepth XmCDepth int dynamic CG

XmNdestroyCallback XmCCallback XtCallbackList NULL C

XmNheight XmCHeight Dimension dynamic CSG

XmNinitialResourcesPersistent XmCInitialResourcesPersistent Boolean True C

XmNmappedWhenManaged XmCMappedWhenManaged Boolean True CSG

XmNscreen XmCScreen Screen * dynamic CG

XmNsensitive XmCSensitive Boolean True CSG

XmNtranslations XmCTranslations XtTranslations dynamic CSG

XmNwidth XmCWidth Dimension dynamic CSG

XmNx XmCPosition Position 0 CSG

XmNy XmCPosition Position 0 CSG

Geometry Management

The preferred size of the entire outline will be just large enough to contain all nodes  in the hierarchy. As the node state changes the outline will attempt to resize itself to  just contain its currently visible children. If the outline is forced away from its desired  size the children will not be moved and will either be clipped, or appear in the upper  left hand corner of the window. For this reason it is usually desirable to put the outline  into a Scrolled Window widget.

Referenced By

XmCreateOutline(3), XmVaCreateOutline(3).