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Human Interface Guidelines/Design Fundamentals/Key Design Principles (view source)
Revision as of 17:05, 13 December 2006
, 17:05, 13 December 2006→Recoverability: slight rewording of one sentence for clarity
The [[OLPC Human Interface Guidelines/The Laptop Experience/The_Journal|journal]] provides a partial notion of recoverability, since its auto-journaling amounts to maintaining an automatic incremental backup. The ability for a child to choose to "keep" anything she's working on in its current state furthers this idea.
The [[OLPC Human Interface Guidelines/The Laptop Experience/The_Journal|journal]] provides a partial notion of recoverability, since its auto-journaling amounts to maintaining an automatic incremental backup. The ability for a child to choose to "keep" anything she's working on in its current state furthers this idea.
However, the primary and essential means of recoverability remains the ability to undo one's actions. Of course, the notion of undo/redo becomes complicated in the realm of collaborative editing, which imposes a limitation on the extent to which undos are possible, since collisions between the things one child wants to undo and the things another child has already changed since they were done occur often. Nonetheless, we are dedicated to providing this functionality to every extent possible, and [[OLPC Human Interface Guidelines/Activities|activities]] should strive to support this to the best of their ability.
However, the primary and essential means of recoverability remains the ability to undo one's actions. Of course, the notion of undo/redo becomes complicated in the realm of collaborative editing, which imposes a limitation on the extent to which undos are possible, since collisions could often occur between the things one child wants to undo and the things another child has already changed since those were done. Nonetheless, we are dedicated to providing this functionality to every extent possible, and [[OLPC Human Interface Guidelines/Activities|activities]] should strive to support this to the best of their ability.
(Future revisions of the [[OLPC Human Interface Guidelines/The Sugar Interface/Input Systems#Keyboard|keyboard]] may even have an undo/redo key to further strengthen this idea.)
(Future revisions of the [[OLPC Human Interface Guidelines/The Sugar Interface/Input Systems#Keyboard|keyboard]] may even have an undo/redo key to further strengthen this idea.)