Name

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      CATTOOL

Purpose

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      This object implements a tool object class. It contains a storage pointer for
      the data before the tool is applied. This is so the result of the tool can be
      undone later. And it contains a target field so it knows what object was the
      target of the tool. The tool applies an operation to the target object.

Authors

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        FANNING SOFTWARE CONSULTING BURRIDGE COMPUTING
        1645 Sheely Drive 18 The Green South
        Fort Collins Warborough, Oxon
        CO 80526 USA OX10 7DN, ENGLAND
        Phone: 970-221-0438 Phone: +44 (0)1865 858279
        E-mail: davidf@dfanning.com E-mail: davidb@burridgecomputing.co.uk

Superclasses

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      CATATOM
      CATCONTAINER
      IDL_CONTAINER

Syntax

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      toolObject = OBJ_NEW ('CATTOOL')

Class Structure

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  class = { CATTOOL, $ ; The object class name.
            INHERITS CATATOM, $ ; Inherits CATATOM
            _theCache: Ptr_New(), $ ; The pre-tool data location.
            _noCache: 0L $ ; A flag that indicates the input data is not to be cached or stored.
            _theTarget: Obj_New(), $ ; The tool target. The tool is APPLIED to the data in this object.
          }

Modification History

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      Written by: David Fanning, 3 April 2003.