ENVIView::Pan

The Pan method moves the center of the view DeltaX units left or right and DeltaY units up or down.

Example

; Launch the application

e = ENVI()

; Open as an ENVIRaster

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

  SUBDIRECTORY = ['data'])

raster = e.OpenRaster(file)

; Get the view and create layer

view = e.GetView()

layer = view.CreateLayer(raster)

; Pan to lower right corner

view.Pan, 3000, 3000

Syntax

ENVIView.Pan, DeltaX, DeltaY [, ERROR=variable]

Arguments

DeltaX

The number of display pixels to pan in the x direction. A positive value moves the view center to the right.

DeltaY

The number of display pixels to pan in the y direction. A positive value moves the view center down.

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