Pad A Zooming Graphical Interface for Exploring Alternate Interface Physics

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PadA Zooming Graphical Interface for Exploring
Alternate Interface Physics
by Benjamin B. Bederson James D. Hollan

• Presented by Dilshad Akhter

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Outline

• What is Pad
• Motivation
• Pad . Jazz
• Demo
• Optimization
• References
• Concluding Remarks

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What is Pad?

• A zooming graphical interface that is considered
  to be an alternative to traditional window and
  icon-based approaches to interface design

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Motivation

• Support viewing information at different scales.
• Effective access to a large body of information
  on a much smaller display.
• Apart from presenting information, can also
  determine the scale of information.
• Find specific information in large data spaces.

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Pad . Jazz

• Pad
• Older tool built using C and scripting language
• Jazz
• Took the idea from Pad
• Built from scratch
• Java library
• Application
• HiNote
• CounterPoint

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Jazz
Jazz
Jazz
Jazz
Jazz
DEMO
Jazz
Jazz
Jazz
Jazz
Jazz
Jazz
Jazz
Jazz
Jazz
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Optimization

• Spatial Indexing
• Creates a hierarchy of objects based on bounding
  boxes to quickly index to visible object.
• Restructuring
• Automatically restructure the hierarchy of
  objects to maintain a balanced tree for faster
  indexing.
• Spatial level-Of-Detail
• Render only the detail needed.

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Optimization (cont.)

• Clipping
• Only render the actually visible portion.
• Refinement
• Render fast with low resolution while navigating
  and refine the image when still.
• Adaptive Render Scheduling
• Keep the zooming rate constant even as the frame
  rate changes.

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Other Advantage

• Experiment with hypertext system as well. When a
  hyperlink is selected the linked data is loaded
  to the side and made smaller, and animated to
  center the new data.

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Concluding Remarks

• Basic uniqueness is its Spatial nature
• Pad focuses on efficiency and expandability by
  employing certain efficiency mechanism.
• It is able to maintain high frame rate
  interaction with very large databases.
• This is part of an informational physics
  perspective for interface design.

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HCI Metrics

• Learning Curve
• Ease of use
• User satisfaction
• Retention
• Error-recovery

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References

• http//www.cs.umd.edu/hcil/pad/
• http//www.cs.umd.edu/hcil/jazz/
• http//www.cs.umd.edu/hcil/pad/sitemap/

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Questions/Comments?

• Thank You.