ENVIRasterLayer::GetView

The GetView function method returns the ENVIView where the layer resides.

Example

For the following example:

Copy and paste the procedure into an IDL editor window.
Save the file as envirasterlayer_getview_example.pro.
Compile and run the procedure.

PRO envirasterlayer_getview_example

COMPILE_OPT IDL2

  ; Launch the application

  e = ENVI()

  ; Open a file

  file = FILEPATH('qb_boulder_msi', ROOT_DIR=e.ROOT_DIR, $

    SUBDIRECTORY = ['data'])

  raster = e.OpenRaster(file)

  ; Create views with 1 band per layer

  for i=0,raster.nbands-2 do begin

    view = e.GetView()

    layer = view.CreateLayer(raster,BANDS=[i])

    view = e.CreateView()

  endfor

  ; Remove last view

  view.Close

  ; Get the View associated with the last layer

  view = layer.GetView()

END

Syntax

Result = ENVIRasterLayer.GetView([, ERROR=variable])

Return Value

This method returns the ENVIView where the layer resides.

Keywords

Keywords are applied only during the initial creation of the object.

ERROR

Set this keyword to a named variable that will contain any error message issued during execution of this routine. If no error occurs, the ERROR variable will be set to a null string (''). If an error occurs and the routine is a function, then the function result will be undefined.

When this keyword is not set and an error occurs, ENVI returns to the caller and execution halts. In this case, the error message is contained within !ERROR_STATE and can be caught using IDL's CATCH routine. See IDL Help for more information on !ERROR_STATE and CATCH.

See Manage Errors for more information on error handling in ENVI programming.

Version History

ENVI 5

Introduced

API Version

4.2