CS8113g: Introduction

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UI softwareQualitative Evaluation
11/12/98
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Agenda

• Questions
• GVU Demo Day
• Prototype QA
• Final Presentations
• UI software overview

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Prototype QA

• Requests by evaluation teams

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Final Presentations

• Format
• designers intro
• evaluation results
• rebuttal by design team
• discussion
• Your team responsible for 2 presentations.

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Scheduling

• Well do it on Tuesday, so think about
  constraints.
• Part 3 due on Tuesday, Dec. 1
• Place presentation materials on designer teams
  Web notebook

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UI Software

• Prelude to CS 6395
• UI Software Construction
• Programming elements of a GUI
• roles/architecture of a windowing system
• application programming
• toolkits
• high-level support (Builders/UIMS)

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For more information

• See Web

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Roles of a windowing system

• Device independence
• abstract terminal
• imaging model (output and input)
• Multiple application control

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In pictures
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Architecture

• Drivers for device independence
• Client-Server for multiple application control
• separate application (server) manages access to
  other applications (clients)

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In pictures
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The X windowing system

• Industry standard client-server solution
• Separate window manager application
• focus policy
• look and feel

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In pictures
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Programming the application

• How to handle dialogue?
• User-System flow of control
• internal to application
• external to application

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Internal flow control

• Read-Evaluate loop paradigm

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External flow control

• Notification-based programming

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UI toolkits

• Collections of UI widgets
• Reusable Customizable objects
• Nice fit to OO paradigm
• Examples

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Higher level support

• UI Builders
• ease of construction of interface
• built on-top of toolkits
• e.g.,
• UIMS
• support for larger systems
• more architectural support

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Architectural support

• Seeheim
• MVC
• PAC