Table of Contents

Executive Summary
1. Experimental design
- 1.1 Idealizing a GUI toolkit
- 1.2 Evolving a framework
  - 1.2.1 Inheritance
  - 1.2.2 Unit tests
2. The ui GUI toolkit
- 2.1 The ui package
- 2.2 The composites module
  - 2.2.1 Component
  - 2.2.2 Panel
  - 2.2.3 Frame
  - 2.2.4 App
- 2.3 The widgets module
  - 2.3.1 Widget
  - 2.3.2 TextWidget
  - 2.3.3 Button
  - 2.3.4 Choice
  - 2.3.5 ListBox
- 2.4 Unit tests
- 2.5 Discussion
3. Scalar models: the Cell classes
- 3.1 Introduction
  - 3.1.1 Terminology
  - 3.1.2 Incremental definition
- 3.2 Interfaces
  - 3.2.1 A cell is a variable
  - 3.2.2 A cell is observable
  - 3.2.3 A cell is a node
  - 3.2.4 A cell is constrained
- 3.3 Refactored constraints
  - 3.3.1 Constrained metaclass
  - 3.3.2 Constrain method
- 3.4 Dependent cells
  - 3.4.1 External references
  - 3.4.2 Calculate method
  - 3.4.3 Automatic registration
- 3.5 Notion of state
  - 3.5.1 Extracting state values
  - 3.5.2 Transferring state values
- 3.6 Specialization of cells
- 3.7 Philosophical concerns
  - 3.7.1 Too heavy?
  - 3.7.2 Too rigid?
  - 3.7.3 Too tightly coupled?
- 3.7 Discussion

4. Scalar presenters
- 4.1 TextField
  - 4.1.1 Connection from model
  - Connection to model
- 4.2 Button
- 4.3 Choice
  - Connection from model
  - Connection to model
- 4.4 ListBox
  - Connection from model
  - Connection to application
- 4.5 Discussion
5. Composite presenters
6. Composite models
7. Persistence
Statement of Conclusions

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