Use this procedure to return the centering offsets for a widget.

Syntax

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ENVI_CENTER, Xoff, Yoff [, /XBIG] [, /YBIG]

Arguments

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Xoff

This is a named variable that contains the x (horizontal) offset for use in the call to the IDL routine WIDGET_BASE.

Yoff

This is a named variable that contains the y (vertical) offset for use in the call to the IDL routine WIDGET_BASE.

Keywords

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XBIG

Set this keyword if the widget will be large in the horizontal direction.

YBIG

Set this keyword if the widget will be large in the vertical direction.

Example

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The following code gets the centering information from ENVI_CENTER and uses it in the call to WIDGET_BASE.

envi_center, xoff, yoff

base = widget_base(title='Center test', $

   xoff=xoff, yoff=yoff, /column)

API Version

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4.3