This is a utility routine to position a widget program on the display at an arbitrary
  location. By default the widget is centered on the display.

Categories

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    Utilities
   

Params

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    tlb: in, required, type=long
      The top-level base identifier of the widget program. This must
      be a valid widget ID.
    x: in, optional, type=integer
      Set this equal to a normalized position for the center
      of the widget as measured from the left-hand side of the screen.
      The default value is 0.5 (the center) Setting this equal to 1.0
      places the widget at the far right-hand side of the screen.
    y: in, optional, type=integer
      Set this equal to a normalized position for the center
      of the widget as measured from the top of the screen.
      The default value is 0.5 (the center) Setting this equal to 1.0
      places the widget at the bottom of the screen.
     

Keywords

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    centerontlb: in, optional, type=long
      If provided, the center of the widget is positioned at
      the center of the widget whose ID is provided here.
    device: in, optional, type=boolean, default=0
      Normally, the x and y parameters are specified in normalized
      coordinates. If this keyword is set, they are taken to be in device
      coordinates.
    nocenter: in, optional, type=boolean, default=0
      By default, the center of the widget is positioned at the
      location specified by the x and y parameters. If `NoCenter` is set
      to a non-zero value, then the upper left corner of the widget
      is postioned at the specifed location.
       

Author

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    FANNING SOFTWARE CONSULTING::
      David W. Fanning
      1645 Sheely Drive
      Fort Collins, CO 80526 USA
      Phone: 970-221-0438
      E-mail: david@idlcoyote.com
      Coyote's Guide to IDL Programming: http://www.idlcoyote.com

History

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    Change History::
      Written by: Dick Jackson, 12 Dec 98.
      Modified to use device-independent Get_Screen_Size
            function. 31 Jan 2000. DWF.
      Added x, y, NOCENTER and run-off protection. 26 Jan 2001. BT.
      Added a maximum value of 1280 for X screen size. This helps
            center the widget on a single monitor when using dual
            monitor settings with some graphics cards. 3 Feb 2003. DWF.
      Added DEVICE keyword. 4 January 2006. DWF.
      Added CenterOnTLB keyword. 7 March 2011. DJ.
      Renamed cgCenterTLB and retired the previous CenterTLB program. 29 Oct 2012. DWF.
      Fixed documention of y parameter. 1 Oct 2013. DWF.

Copyright

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    Copyright (c) 2012, Fanning Software Consulting, Inc.