Справочник Пользователя для ITT Rule IDL Version 7.0
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Chapter 9: Creating a File Reader
Example: TIFF File Reader
iTool Developer’s Guide
END
Discussion
The GetProperty method for our TIFF file reader supports a single property named
IMAGE_INDEX. If this property is specified in the call to the GetProperty method,
its value is retrieved from the
IMAGE_INDEX. If this property is specified in the call to the GetProperty method,
its value is retrieved from the
_index
instance data field. Any other properties
included in the method call are passed to the superclass’ GetProperty method.
SetProperty Method
PRO example1_readtiff::SetProperty, IMAGE_INDEX = image_index, $
_REF_EXTRA = _extra
IF (N_ELEMENTS(image_index) GT 0) THEN $
self._index = image_index
IF (N_ELEMENTS(_extra) GT 0) THEN $
self->IDLitReader::SetProperty, _EXTRA = _extra
END
Discussion
The SetProperty method for our TIFF file reader supports a single property named
IMAGE_INDEX. If this property is specified in the call to the SetProperty method,
its value is placed in the
IMAGE_INDEX. If this property is specified in the call to the SetProperty method,
its value is placed in the
_index
instance data field. Any other properties included in
the method call are passed to the superclass’ SetProperty method.