ENVIView::ConvertWindowToFile

The ConvertWindowToFile method converts a set of IDL window coordinates into file coordinates. It is often used in combination with event handlers.

Example

See the example for Mouse Event Handlers.

Syntax

ENVIView.ConvertWindowToFile, WindowX, WindowY, FileX, FileY

Arguments

WindowX

The window x-coordinate

WindowY

The window y-coordinate

FileX

A named variable that contains the file x-coordinate

FileY

A named variable that contains the file y-coordinate

Keywords

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 5.1

Introduced

API Version

4.2