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Boomerang: Suspendable Drag-and-Drop Interactions Based on a Throw-and-Catch Metaphor (presented at UIST 2007)
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Boomerang: SuspendableDrag-and-Drop Interactions Basedon a Throw-and-Catch Metaphor
Masatomo Kobayashi
Takeo Igarashi
(The University of Tokyo)
Outline
Background & Motivation
Our Approach
Early Feedback
Conclusion & Future Work
Background
Drag & drop is versatile and easy to use.
Move
Copy
Create a shortcut
Open
(Application specific operations)
Problems while dragging
Demo
The drop target is often invisible:
hidden outside the scrolling rectangle
hidden by overlapping windows
hidden in a deep folder
hidden in another tab, page, slide, …
Problems while dragging
Window-scrolling, switching, etc. are difficult or impossible while dragging.
Previous work
Window-switchingWindow-scrolling
hovering hovering
Hovering-based interactions are less efficient than clicking-based ones.
Using heuristics/predictionWindow-switching
Previous work
Fold & Drop[Dragicevic 2004]
Drag & Guess[Nishida & Igarashi 2007]
Drag & Pop[Baudisch et al. 2003]
Many other operations are still difficult or impossible.
Rock & Roll[Chapuis & Roussel 2007]
Outline
Background & Motivation
Our Approach
Early Feedback
Conclusion & Future Work
Suspending a dragging operation
CatchThrow
Suspend dragging
Resume dragging
Any operation
Suspending a dragging operation
Demo
Demo summary
Throw: suspend a dragging operationCatch: resume the suspended operationSpinning animationAnimating, translucent marksSuspending multiple dragging operationsGroupingCopying, deleting
Differences betweenboomerang and cut-and-paste
More versatile than cut-and-paste.Opening a file with a specific application.Application-specific operations.
‣embedding an object, opening a URL, …
Provides visual feedbacks while dragging.
Works without menus/shortcut keys.
Boomerang is an extension of drag-and-drop.
Differences betweenboomerang and cut-and-paste
The user can also use it just like traditional drag-and-drop techniques.As long as the target is not hidden.
Boomerang is an extension of drag-and-drop.
Outline
Background & Motivation
Our Approach
Early Feedback
Conclusion & Future Work
Informal study
Asked four users to try the boomerang for 10-15 min.
Provided a set of files and folders.
Early Feedback
Will be useful
Feature Feedback
Throw-and-catch
Grouping
Copying, deleting
Exciting
Maybe difficult for novices
Will be useful
Easy to use
Difficult to use
Likely causes errors
Outline
Background & Motivation
Our Approach
Early Feedback
Conclusion & Future Work
ConclusionThe throw-and-catch interaction makes dragging operations suspendable.
CatchThrow
Any operation
Boomerang supports grouping, copying, & deleting.
Grouping Copying Deleting
Conclusion
Temporary Glass Pane
Gesture
Conclusion
A simple gesture can enhance a common WIMP interface, preserving existing functionalities.
Limitations
The throwing gesture will be difficult for novices and elders.Another gesture (or button, shortcut key)
might be preferable.
Limitations
Failed gestures might cause serious errors.e.g., If the user failed to throw an item, the
item will be dropped unexpectedly.
Future WorkPerform experiments to assess the advantages and disadvantages of the boomerang technique.
Window-switchingWindow-scrolling
?? Can it improve the performance?
?? How does the user fail to throw and catch?
Thank you.
