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       XmScrolledWindow  —  The  ScrolledWindow  widget  class  "XmScrolledWindow" "widget class"


       #include <Xm/ScrolledW.h>


       The ScrolledWindow widget combines one or two ScrollBar widgets  and  a  viewing  area  to
       implement a visible window onto some other (usually larger) data display. The visible part
       of the window can be scrolled through the larger display by the use of ScrollBars.

       To use ScrolledWindow, an application first creates a ScrolledWindow  widget,  any  needed
       ScrollBar widgets, and a widget capable of displaying any desired data as the work area of
       ScrolledWindow. ScrolledWindow positions the work area widget and displays the  ScrollBars
       if  so  requested. When the user performs some action on the ScrollBar, the application is
       notified through the normal ScrollBar callback interface.

       ScrolledWindow can be  configured  to  operate  automatically  so  that  it  performs  all
       scrolling  and  display  actions  with no need for application program involvement. It can
       also be configured to provide a minimal support framework  in  which  the  application  is
       responsible  for  processing all user input and making all visual changes to the displayed
       data in response to that input.

       When ScrolledWindow is performing automatic scrolling it creates  a  clipping  window  and
       automatically  creates  the  scroll  bars.  Conceptually, this window becomes the viewport
       through which the user examines the larger underlying data area.  The  application  simply
       creates  the desired data, then makes that data the work area of the ScrolledWindow.  When
       the user moves the slider to change the displayed data, the workspace is moved  under  the
       viewing area so that a new portion of the data becomes visible.

       Sometimes  it  is  impractical  for an application to create a large data space and simply
       display it through a small clipping window. For example, in  a  text  editor,  creating  a
       single  data  area  that  consisted of a large file would involve an undesirable amount of
       overhead.  The application needs to use a  ScrolledWindow  (a  small  viewport  onto  some
       larger  data), but needs to be notified when the user scrolls the viewport so it can bring
       in more data from storage and update the display area. For these cases, the ScrolledWindow
       can  be  configured  so that it provides only visual layout support. No clipping window is
       created, and the application must maintain the data displayed in the work area, as well as
       respond to user input on the ScrollBars.

       The  user  can  specify resources in a resource file for the automatically created widgets
       that contain the  horizontal  and  vertical  scrollbars  and  the  clipping  area  of  the
       ScrolledWindow  widget.  The  names  of these widgets are HorScrollBar, VertScrollBar, and
       ClipWindow respectively, and remain consistent whether  created  by  XmCreateScrolledList,
       XmCreateScrolledText or XmCreateScrolledWindow.

       ScrolledWindow uses the XmQTnavigator trait, and holds the XmQTscrollFrame trait.

       ScrolledWindow  automatically  creates  the  descendants shown in the following table.  An
       application can use XtNameToWidget to gain access to the named descendant. In addition,  a
       user or an application can use the named descendant when specifying resource values.

       │Named DescendantClassIdentity              │
       │VertScrollBarXmScrollBar  │ vertical scroll bar   │
       │HorScrollBarXmScrollBar  │ horizontal scroll bar │
       │ClipWindowXmClipWindow │ clip window           │
       ScrolledWindow  inherits behavior, resources, and traits from Core, Composite, Constraint,
       and XmManager.

       The class pointer is xmScrolledWindowWidgetClass.

       The class name is XmScrolledWindow.

   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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