It's been a classic design principle that any scrollable view should
auto-scroll when an object is dragged outside or close to boundary of
the view.
Here's what Alan Cooper wrote in his "About Face" book:
"Auto-scroll is a very important adjunct to drag-and-drop. Wherever
the drop target can poss
Two quick ideas for alternatives:
- a zooming user interface would remove the need to scroll. With a zoom out,
both origin and target of the drag-and-drop can be viewed at the same time
no matter the distance between them. This would lack accuracy in selecting
the target position, though, unless so
Hi
I use the auto-scroll feature (as I understand your def.) every day
and find it works well for me. In Thunderbird (email) I have quite a
few folders for tracking many projects, jobs, etc. One of my
subfolders itself expands well beyond the height of the screen. With
auto scroll, it'
A solution to the variable scroll speed might be to add a speed
indicator along the "scrolling edge".
When the scrolling starts, place a scrolling indicator just below the
cursor, and let the users move position the mouse a little further
up/down on the indicator to adjust the speed.
Downside: us
Oleg,
well spotted - all auto-scroll implementations indeed do suck.
While I can't recall any such example of the top of my head, a good
alternative would be along the OS X Dock (enlarging focused icons) or some
kind of loupe UI - ie. keep the whole context in one page in a scaled down
version, a
How about sticking to auto-scrolling but removing the acceleration
component. Often the acceleration is what confuses people as the
dragged items speed up too much and users lose control.
What about two fixed scroll speeds. One could have a reasonable
scroll speed assigned to the default drag ope
I like the auto-zoom-out idea.
Here's how to refine it: When you approach the view border, zoom out. When
the user slows down/stops his mouse movement (after a delay of, say, 200
msec), zoom back in to allow precision placement.
It hews to the user's mental (well, physical?) model -- look at the
Teehan Lax has a nice exploration in the iPhone paging and
incorporates zooming in their method. It probably doesnt have much
application elsewhere but its an interesting approach:
http://www.teehanlax.com/blog/?p=818
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Posted from
uhm...what about a scrolling feature that,if the user accelerates,
gradually zoomes out? in this way, you would scroll but at the same
time you'll need to scroll less, since the more you do that the more
the pages is visible in its entire height-width
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