ENVIView::Select

The Select method makes the view the active view.

Example

For the following example:

1. Copy and paste the procedure into an IDL editor window.
2. Save the file as enviview_select_example.pro.
3. Compile and run the procedure.

 

PRO enviview_select_example

compile_opt idl2

  ; Launch the application

  e = ENVI()

 

  ; Create an ENVIRaster

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

    SUBDIRECTORY = ['data'])

 

  raster = e.OpenRaster(file)

 

  ; Set up views by creating three more

  FOR i=0,2 DO !null=e.CreateView()

 

  ; Display a band in each view

  views = e.GetView(/ALL)

 

  FOR i=0,n_elements(views)-1 DO BEGIN

    ; Select the view

    (views[i]).Select

 

    ; Get a reference to the currently-selected view

    view = e.GetView()

 

    ; Create a layer on the current view

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

  ENDFOR

END

Syntax

ENVIView.Select [, ERROR=variable]

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

See Also

ENVIView, ENVI::GetView