scroller iPhone with bounce

BNig niggemann at
Wed Dec 8 03:29:38 EST 2010

Hi Terry,

I meant to say you neither see the bounce nor the deceleration after
scrolling in the Simulator.

You can scroll in the Simulator, but you need a real device to test
scrolling related questions.

Sorry for not making the distinction.

Glad you liked the example.

Kind regards


Terry Judd wrote:
> Hey Bernd, thanks for this really useful example.
> Did you mean that the simulator doesn't bounce? because it scrolls just
> fine
> if you mouse down and drag.
> Terry...
> On 8/12/10 11:11 AM, "BNig" <niggemann at> wrote:
>> You would want to look at the scroller on a real device. The simulator
>> does
>> not scroll. Forgot to mention that in the previous post.
>> regards
>> Bernd
>> BNig wrote:
>>> I figured the scroller example in Livecode mobile 4.5.2 was not really
>>> complete so I set up the new scroller in a little stack: a list field
>>> with
>>> a bounce. The bounce was not obvious from the example so I hope this
>>> helps
>>> people to implement this. (look at the group "umscroll" with lockloc
>>> true
>>> and the list field)
>>> Almost all the code is in the card script. Except for a mouseUp handler
>>> in
>>> the list field to make the actual selection.
>>> The new scroller is a very nice object that really makes things a lot
>>> easier. It scrolls very smoothly even on my slow iPhone 3G. Selection is
>>> a
>>> lot easier since the operating system takes a lot of guesswork out of
>>> when
>>> a touch is the begin of a scroll and when a touch is a selection.
>>> There is one quirk in the current incarnation of the mobile engine:
>>> the scroll is really only starting to scroll if you slide the field up
>>> and
>>> then touch the network bar or whatever you call it. The top line of the
>>> screen where the battery is shown etc. This 'defrosts' the scrolling and
>>> from then on you can scroll and bounce like you expect it. Runrev is
>>> aware
>>> of the problem.
>>> the zipped version of the stack:
>>> ip
>>> regards
>>> Bernd
> --
> Dr Terry Judd | Senior Lecturer in Medical Education
> Medical Education Unit
> Melbourne Medical School
> The University of Melbourne
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