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NAME

       XmLabelGadget — The LabelGadget widget class

SYNOPSIS

       #include <Xm/LabelG.h>

DESCRIPTION

       LabelGadget  is  an  instantiable widget and is also used as a superclass for other button
       gadgets, such as PushButtonGadget and ToggleButtonGadget.

       LabelGadget can contain either text or a pixmap. LabelGadget text is  a  compound  string.
       Refer  to the Motif Programmer's Guide for more information on compound strings.  The text
       can be multilingual, multiline, and/or multifont. When a LabelGadget is  insensitive,  its
       text is stippled, or the user-supplied insensitive pixmap is displayed.

       LabelGadget  supports  both  accelerators  and  mnemonics primarily for use in LabelGadget
       subclass widgets that are contained in menus. Mnemonics are available  in  a  menu  system
       when  the  button  is  visible. Accelerators in a menu system are accessible even when the
       button is not visible.  The LabelGadget displays the mnemonic  by  underlining  the  first
       matching  character  in  the  text  string.  The accelerator is displayed as a text string
       adjacent to the label text or pixmap, depending on the layout direction.

       LabelGadget consists of many margin fields surrounding the text or pixmap.   These  margin
       fields  are  resources that may be set by the user, but LabelGadget subclasses and Manager
       parents also modify  some  of  these  fields.  They  tend  to  modify  the  XmNmarginLeft,
       XmNmarginRight,  XmNmarginTop,  and XmNmarginBottom resources and leave the XmNmarginWidth
       and XmNmarginHeight resources as set by the application.

       LabelGadget takes into account XmNshadowThickness in determining its layout but  does  not
       draw  the  shadow.   That  is, if XmNshadowThickness is greater than 0 (zero), LabelGadget
       leaves space for the shadow, but the shadow does not appear.

       In a LabelGadget, XmNtraversalOn and XmNhighlightOnEnter are forced to False inside  Popup
       menu  panes,  Pulldown  menu panes, and OptionMenus.  Otherwise these resources default to
       False.

       LabelGadget uses the XmQTmenuSystem  and  XmQTspecifyRenderTable  traits,  and  holds  the
       XmQTaccessTextual, XmQTcareParentVisual, XmQTmenuSavvy, and XmQTtransfer traits.

   Data Transfer Behavior
       LabelGadget  and it subclasses, except when used in a menu system, support dragging of the
       label contents from the LabelGadget.  However, the label contents are  draggable  only  if
       the XmNenableUnselectableDrag resource of XmDisplay is set to True.

       As  a  source  of  data,  LabelGadget and its subclasses support the following targets and
       associated conversions of data to these targets:

       locale    If  the  locale  target  matches  the  widget's  locale,  the  widget  transfers
                 XmNlabelString  in  the  encoding  of the locale.  This target is supported only
                 when XmNlabelType is XmSTRING or XmPIXMAP_AND_STRING.

       COMPOUND_TEXT
                 The widget transfers XmNlabelString  as  type  COMPOUND_TEXT.   This  target  is
                 supported only when XmNlabelType is XmSTRING or XmPIXMAP_AND_STRING.

       UTF8_STRING
                 The  widget  transfers  XmNlabelString  as  type  UTF8_STRING.   This  target is
                 supported only when XmNlabelType is XmSTRING of XmPIXMAP_AND_STRING.

       PIXMAP    The widget transfers XmNlabelPixmap as type DRAWABLE.  This target is  supported
                 when XmNlabelType is XmPIXMAP or XmPIXMAP_AND_STRING.

       STRING    The  widget  transfers  XmNlabelString as type STRING.  This target is supported
                 when XmNlabelType is XmSTRING or XmPIXMAP_AND_STRING.

       TEXT      If XmNlabelString is fully convertible to the encoding of the locale, the widget
                 transfers  XmNlabelString  in the encoding of the locale.  Otherwise, the widget
                 transfers XmNlabelString as type COMPOUND_TEXT.  This target is  supported  when
                 XmNlabelType is XmSTRING or XmPIXMAP_AND_STRING.

       _MOTIF_CLIPBOARD_TARGETS
                 The  widget  transfers,  as type ATOM, a list of the targets it supports for the
                 CLIPBOARD selection.  When  XmNlabelType  is  XmSTRING  or  XmPIXMAP_AND_STRING,
                 these include the following targets:

                    ·  _MOTIF_COMPOUND_STRING

                    ·  COMPOUND_TEXT

                    ·  UTF8_STRING

                    ·  The  encoding of the locale, if XmNlabelString is fully convertible to the
                       encoding of the locale

                    ·  STRING, if XmNlabelString is fully convertible to STRING

                 When XmNlabelType  is  XmPIXMAP  or  XmPIXMAP_AND_STRING,  the  targets  include
                 PIXMAP.

       _MOTIF_COMPOUND_STRING
                 The  widget transfers XmNlabelString as a compound string in Byte Stream format.
                 This target is supported when XmNlabelType is XmSTRING or XmPIXMAP_AND_STRING.

       _MOTIF_EXPORT_TARGETS
                 The widget transfers, as type ATOM, a list of the targets  to  be  used  as  the
                 value  of  the DragContext's XmNexportTargets in a drag-and-drop transfer.  When
                 XmNlabelType    is    XmSTRING    or    XmPIXMAP_AND_STRING,    these    include
                 _MOTIF_COMPOUND_STRING,  COMPOUND_TEXT, UTF8_STRING, the encoding of the locale,
                 STRING, TEXT, BACKGROUND, and FOREGROUND.   When  XmNlabelType  is  XmPIXMAP  or
                 XmPIXMAP_AND_STRING, these include PIXMAP, BACKGROUND, and FOREGROUND.

       As a source of data, LabelGadget also supports the following standard Motif targets:

       BACKGROUND
                 The widget transfers the parent's XmNbackground as type PIXEL.

       CLASS     The  widget  finds  the  first shell in the widget hierarchy that has a WM_CLASS
                 property and transfers the contents as text in the current locale.

       CLIENT_WINDOW
                 The widget finds the first shell in  the  widget  hierarchy  and  transfers  its
                 window as type WINDOW.

       COLORMAP  The widget transfers the parent's XmNcolormap as type COLORMAP.

       FOREGROUND
                 The widget transfers the parent's XmNforeground as type PIXEL.

       NAME      The  widget  finds  the  first  shell in the widget hierarchy that has a WM_NAME
                 property and transfers the contents as text in the current locale.

       TARGETS   The widget transfers, as type ATOM, a list of the targets  it  supports.   These
                 include  the  standard  targets  in this list.  When XmNlabelType is XmSTRING or
                 XmPIXMAP_AND_STRING, these also include  _MOTIF_COMPOUND_STRING,  COMPOUND_TEXT,
                 UTF8_STRING, the encoding of the locale, STRING, and TEXT.  When XmNlabelType is
                 XmPIXMAP or XmPIXMAP_AND_STRING, these also include PIXMAP.

       TIMESTAMP The widget transfers the  timestamp  used  to  acquire  the  selection  as  type
                 INTEGER.

       _MOTIF_RENDER_TABLE
                 The  widget  transfers  XmNrenderTable  if  it  exists, or else the default text
                 render table, as type STRING.

       _MOTIF_ENCODING_REGISTRY
                 The widget transfers its encoding registry as type STRING.  The value is a  list
                 of  NULL  separated  items  in  the  form  of  tag  encoding pairs.  This target
                 symbolizes the transfer target for the Motif Segment Encoding Registry.  Widgets
                 and  applications  can  use  this Registry to register text encoding formats for
                 specified render table tags.   Applications  access  this  Registry  by  calling
                 XmRegisterSegmentEncoding and XmMapSegmentEncoding.

   Classes
       LabelGadget inherits behavior, resources, and traits from Object, RectObj and XmGadget.

       The class pointer is xmLabelGadgetClass.

       The class name is XmLabelGadget.

   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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