Zoom Bar

Description

A new widget for zooming and panning.
Instead of zooming towards or away from a focal point, zoom towards or away from a fixed line.
Filter by changing the range of displayed values on one of the axes.
Zooming a starfield display should be incremental and flicker-free so that users can track the motion of each rectangle. [JOG] Utilized in the Film Finder.
Purposes of zooming

reveal detail
reduce clutter

Advantages

Why zoom bar is better than camera-type zooming:

only one dimension at a time means less disorientation for the user. (?)
only one end of the slider at a time means the data moves away from one edge of the window (the focal line) instead of both,less disorienting for the user. (?)

Disadvantages

This page maintained by Mark Brautigam (PDA version)
Last updated 1 March 1997