Implementation of a Java Graphical User Interface for the Visual Programming Language Forms/3 Public Deposited

http://ir.library.oregonstate.edu/concern/graduate_projects/tq57nr067

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  • The visual programming language Forms/3 currently uses a graphical user interface implemented in Garnet. Garnet was developed by the User Interface Software Group in the Human Computer Interaction Institute at Carnegie Mellon University, but is no longer supported. This paper presents an implementation of a user interface for Forms/3 written in Java. In addition to the implementation it also discusses the Model/View/Controller architecture used, the asynchronous socket traffic required for communication with the underlying Lisp engine, and a few design patterns found helpful in the implementation.
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  • Title page ................................................................................................................ 1 Abstract ................................................................................................................... 2 Table of Contents .................................................................................................. 3 Acknowledgments ............................................................................................... 4 1. Background ........................................................................................................ 5 1.1 Visual Programming Languages in general ..................................... 5 1.1.1 Forms/3 ........................................................................................... 5 1.2 Motivation ............................................................................................... 5 2. Design Decisions ............................................................................................... 8 2.1 The Model/View/Controller Pattern ................................................. 8 2.2 Preserving the Existing Lisp Architecture ......................................... 11 2.3 Asynchronous Socket Traffic ............................................................... 11 2.4 Design Patterns ........................................................................................ 12 3. Implementation ............................................................................................... 15 3.1 The Forms3 class .................................................................................... 15 3.2 View-Model Communication ............................................................. 16 3.3 The Forms ................................................................................................ 18 3.4 The Controller - class FormDrawWindow ....................................... 21 3.5 The Referenceable Object (RO) Hierarchies ...................................... 22 3.5.1 the cached RO model .................................................................... 23 3.5.2 the RO view .................................................................................... 25 3.6 Other Objects ........................................................................................... 29 3.6.1 Matrix regions ................................................................................ 29 3.6.2 Dycons .............................................................................................. 30 3.6.3 Arrows ............................................................................................. 32 3.6.4 class Global ...................................................................................... 32 3.6.5 ROFactory ........................................................................................ 33 3.6.6 Dialogs ............................................................................................. 34 3.7 Java Containers, Inheritance, and Casting ....................................... 34 4. Summary .......................................................................................................... 36 5. Future Work .................................................................................................... 37 6. Appendices ....................................................................................................... 38 Appendix A .................................................................................................. 38 Appendix B ................................................................................................... 41 Appendix C ................................................................................................... 54 Appendix D .................................................................................................. 56 7. References ........................................................................................................ 58
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  • description.provenance : Submitted by Philip Vue (vuep@onid.orst.edu) on 2009-06-03T17:38:50Z No. of bitstreams: 1 David_P_Hackenyos.pdf: 423661 bytes, checksum: ed919ed4557cc27f09d62121c6451538 (MD5)
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  • description.provenance : Approved for entry into archive by Linda Kathman(linda.kathman@oregonstate.edu) on 2009-06-03T17:41:21Z (GMT) No. of bitstreams: 1 David_P_Hackenyos.pdf: 423661 bytes, checksum: ed919ed4557cc27f09d62121c6451538 (MD5)

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