Information Technology Reference
In-Depth Information
the status of an electronic document [6], bimanual continuous gestures [7],
and rotation and translation techniques [8].
As for tabletop applications, solutions have been proposed for some
application scenarios, for example, story sharing around the table [9]; tabletop
sharing of digital photographs for the elderly [10]; and browsing, sorting,
and sharing digital images [11].
Though a lot of work has been done, no one has yet given a complete syste-
matic interface design for the tabletop application of sharing digital documents
among multiple users and solving the problems raised by this scenario.
7.3 User Interface Design
7.3.1 Design Considerations
For designing a user interface, first we should know what the user will do
when sharing documents. A group of people want to share documents for
a discussion. First, everyone will get his or her own working area on the
table. Second, they should be able to operate their own digital documents
as needed. Third, during the discussion, users may want to share their
documents with others. From the analysis above we can understand the user
interface design guidelines for sharing digital documents as follows:
•
Support user working area
When a user joins the discussion, he can have his own working area
on the table. When he leaves, he can delete his working area.
•
Support single user operation on documents
A user can read, annotate, and manipulate the digital documents
(such as moving, resizing, and rotating).
•
Support documents sharing operation among multiusers
A user can deliver his own document to others when he wants to
share his document.
7.3.2 gestures Needed
According to the guidelines listed above, a set of interaction gestures are
proposed:
•
Create/Delete user working area, Select, Create, Copy, Annotation
•
Delete, Move, Resize, and Rotate digital document
•
Deliver document to other working areas
