Mouse messages in scrollers

scott at scott at
Thu May 21 22:08:41 EDT 2020

Thank you for the thorough explanation of what you are doing and why. I will give the method that triggers “scrollerDidScrol” a try.


> On May 21, 2020, at 1:22 PM, J. Landman Gay via use-livecode <use-livecode at> wrote:
> It was "delayTouches" mostly. Default is true, I had to set it to false. I also set canCancelTouches to false but didn't test how necessary that was. Default for that is also true.
> This allowed messages to pass through to LC, but you had to very deliberately swipe, holding down a moment so the mouseDown would fire. Brian Milby came up with a faster solution using something like Jim MacConnell's suggestion -- make the contentRect wider than the group so that a horizontal swipe triggers scrollerDidScroll. Lock direction to vertical to prevent wiggle. That proved to be a the solution for a more natural swipe.
> You have to branch for Android because it doesn't have a lockDirection property; for that OS keep the contentRect the same width as the group. Mouse messages pass through to LC automatically, which is good because the above two settings don't exist on Android.
> Swiping is such a normal behavior on mobile, I'd like to see an easier method in LC to accomodate all this.
> On 5/19/20 8:00 PM, scott--- via use-livecode wrote:
>> You have probably already looked at these but here are (some of) the scroller settings I use for the below-mentioned field:
>> ----------------
>> mobileControlSet sScrollerId, "pagingEnabled", "false"
>> mobileControlSet sScrollerId, "decelerationRate", "normal" -- fast --iOS only
>> mobileControlSet sScrollerId, "canScrollToTop", "true"
>> mobileControlSet sScrollerId, "delayTouches", "false"
>> mobileControlSet sScrollerId, "canCancelTouches", “true"
> -- 
> Jacqueline Landman Gay         |     jacque at
> HyperActive Software           |

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