Scrolling jitter

Ralph DiMola rdimola at
Sat Jun 6 13:04:47 EDT 2020

I am not getting jitters on either mobile platform using native scroller.
Scrolling is very smooth. I have 10 or so groups(variable) in a containing
group with 1 or more fields that are clickable. One of the inner groups
contains a small image. I have not seen this or received complaints. I do
get complaints that while scrolling sometimes the fields mouseup handlers
trigger unintentionally. I guess I should put in a timer to ignore the
mouseUPs until a short time after the scrolling stops. Android is most
affected. iOS rarely has this issue. 

Ralph DiMola
IT Director
Evergreen Information Services
rdimola at

-----Original Message-----
From: use-livecode [mailto:use-livecode-bounces at] On Behalf
Of J. Landman Gay via use-livecode
Sent: Friday, June 05, 2020 6:27 PM
To: How to use LiveCode
Cc: J. Landman Gay
Subject: Re: Scrolling jitter

On 6/4/20 2:49 PM, J. Landman Gay via use-livecode wrote:
> On 6/4/20 2:22 PM, J. Landman Gay via use-livecode wrote:
>> So far I've had two complaints from Android users that scrolling 
>> fields in our app are jittering when scrolled. Every field that needs to
scroll is set up identically:
>> Field expanded to full formattedheight Enclosing (shorter) group is 
>> unadorned Group is set to scrolling layermode AcceleratedRendering is 
>> set to true (on launch, and remains unchanged throughout)
>> But when I check the "effective layermode" I get "static". Why?
> Update: that was in IDE and acceleratedRendering wasn't turned on 
> there. However, it is set to true on mobile and that's where the jitter
> Anything else I can do about that?

Today's feedback: It also jitters on iOS. Migraine-inducing. Do people think
this is a serious issue or is it likely to remain like that for a long time?

Does anyone else see significant issues with native scrollers on either
mobile platform? LC 9.6.

Jacqueline Landman Gay         |     jacque at
HyperActive Software           |

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