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MGH_GUI_PDMENU__DEFINE

MGH_GUI_PDMENU__DEFINE

Class


  MGH_GUI_PDmenu

Purpose


  An object that implements pull-down menus.

Superclasses


  None. Note that MGH_GUI_PDmenu shares much of is functionality of
  other GUI objects but unlike them it is *not* a subclass of
  MGH_GUI_Base.

Properties


  The following properties are supported:
    BASE (Init*, Get)
      Base widget ID. This argument must be specified when creating
      a menu-bar menu, otherwise it is ignored.
    CHECKED_MENU (Init)
      During object initialisation a set of buttons is always added
      to the top level of the menu object. The CHECKED_MENU keyword
      specifies whether these buttons have check boxes associated
      with them. The keyword should either be a scalar or a vector
      with the same number of elements as the items
      argument. Default is 0.
    COLUMN (Init)
    ROW (Init)
      Children of a MGH_GUI_PDmenu are always organised in either a
      row or a column and centred. Set one of these keyword for
      column or row alignment. Default is "row". Ignored by menu-bar
      menus.
    CONTEXT (Init, Get)
      Set this keyword to create a context-sensitive menu.
    MENU (Init)
      During object initialisation a set of buttons is always added
      to the top level of the menu object. The MENU keyword
      specifies whether these buttons are menu-buttons (i.e. they
      will be parents of other buttons) or not. It should either be
      a scalar or a vector with the same number of elements as the
      items argument. Default is 1 for menu-bar menus and 0 otherwise.
    PARENT (Init*, Get)
      Parent widget ID. This argument must be specified when
      creating a non-menu-bar menu, otherwise it is ignored.
    MBAR (Init, Get)
      Set this keyword to create a menu attached to a top-level
      base's menu bar.
    UNAME (Init, Get, Set)
      A string that can be used to identify the widget. Default is
      ''.
    UVALUE (Init, Get, Set)
      User value. Default is undefined.
###########################################################################
  This software is provided subject to the following conditions:
  1. NIWA makes no representations or warranties regarding the
    accuracy of the software, the use to which the software may
    be put or the results to be obtained from the use of the
    software. Accordingly NIWA accepts no liability for any loss
    or damage (whether direct of indirect) incurred by any person
    through the use of or reliance on the software.
  2. NIWA is to be acknowledged as the original author of the
    software where the software is used or presented in any form.
###########################################################################

Modification History


  Mark Hadfield, 2001-06.
    Written.
  Mark Hadfield, 2003-06.
    Added support for checked-menu functionality (IDL 6.0).
  Mark Hadfield, 2004-05.
    Added support for acelerator keys (IDL 6.1)



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