Modifiable Treemaps Containing Variable-Shaped Units Frédéric Vernier Mitsubishi Electric Research Labs (MERL, Cambridge) - CLIPS-IMAG Laboratory University of Grenoble, FRANCE

 Motivation –Avoid long rectangles, display label, drag&drop in Treemaps  Fieldmap: Algorithm  Working example: PARENT –Features for file management –Demonstration  Conclusion –Drawbacks and advantages –What’s next Outline

Treemaps / AdFire

Algorithm  Recursive re-arrangement  Evaluation function f(, ) = 1.5 – Ratio width/height Eval = 5.5 Eval = 4.1 Eval = 6.7 Selected option: Min (Eval) …

File Explorer  Information: Files & Folders  Visualization: Shape, Color & Text –Rectangles: Disk usage + –Brightness: File age –Hue: Type of a file –Label: File name  Interaction –Drag & Drop for moving a file –Double clicking for opening a file  Navigation: Stairs, alternative view

1 rst Snapshot  Fixed ratio = 0.2  1400 files  Black stairs (path)  Alternative view

Interactive Stairs

2 nd Snapshot  Fixed ratio = 1.0  240 files  Selected Folder  8 hues, brighter/darker

Treemaps  The same hierarchy using the Nested Treemap algo.  Popup label

Alternative View  Indented list … but could be any other Mac/Win view

Conclusion  New algorithm: Fieldmap –Loads the cpu  New challenges –Selection for multiple files (zone) –Symbolic links –Animation to show a reorganization –Contextual evaluation function  New data set –Debugging: 1 tree/field Map per thread –Spreadsheet: hierarchical cells

Spreadsheet