Swipe over native scroller

[J. Landman Gay]

That's similar to the handlers I'm using but they all fail because no 
mouseUp or touchEnd messages are ever sent if you are over a native 
scroller. The issue isn't with the calculations, it's because the app is 
never informed thar the swipe has completed.

I'll try fiddling with touchMove again, but the message isn't sent 
consistently on slow hardware and sometimes fails.

--
Jacqueline Landman Gay | jacque at hyperactivesw.com
HyperActive Software | http://www.hyperactivesw.com
On January 31, 2019 7:20:38 AM Sannyasin Brahmanathaswami via use-livecode 
<use-livecode at lists.runrev.com> wrote:

> Did you try Terry script? Elanor did something similar this in the Listen 
> module, it not very refined. Terry put time in it with subtle time 
> parameters. I have yet to try it. It here on the list
>
> Terry, do we have a place for a repository for code snippits? Maybe you can 
> put in on the forum.
>
> I don't think  you are going to get response to the bug problem. I have 
> been trying to get smooth scrolling for 3 years!  I think it is more a 
> question of something deep in the engine that "can't be done", at least not 
> cross platform. Otherwise they would have responded by now.
>
> Here's Terry code from Dec. 20...Terry.... have improved it?
>
> ===========
> Terry:
> So, it seems like this approach works ok. Turned out there was an addition 
> complication in that the items in my scrolling list are also selectable and 
> I needed to prevent them being toggled on or off during a left/right swipe 
> action. Anyway, this is what I ended up doing...
>
> In the card script...
>
> local pLoc, pTime, pV, pScroll
>
> on touchStart pTouchID
>   put the mouseLoc into pLoc
>   put the millisecs into pTime
>   put the scroll of grp "checkList" into pScroll
>   put the mouseV into pV
> end touchStart
>
> on touchMove pTouchID, pTouchX, pTouchY
>   put pV-pTouchY into tY
>   put pScroll+tY into tScroll
>   set the scroll of grp "checkList" to tScroll
> end touchMove
>
> on touchEnd pTouchID
>   put the mouseLoc into pLoc1
>   put (item 1 of pLoc)-(item 1 of pLoc1) into tX
>   put (item 2 of pLoc)-(item 2 of pLoc1) into tY
>   put the millisecs - pTime into tElapsed
>   if abs(tX)>100 then # horizontal swipe
>      if abs(tY)< 50 then # small vertical movement
>         if tElapsed < 500 then # not too slow
>            if tX > 0 then
>               send "mouseUp" to grp "nextBtn"
>            else
>               send "mouseUp" to grp "backBtn"
>            end if
>         end if
>      end if
>   end if
> end touchEnd
>
> And in the "checklist" script...
>
> local pX
>
> on mouseDown
>   put the mouseH into pX
> end mouseDown
>
> on mouseUp
>   if abs((the mouseH)-pX) > 50 then exit mouseUp
>   # list selection code
> end mouseUp
>
> BR
>
>
> ?On 1/30/19, 7:17 PM, "use-livecode on behalf of J. Landman Gay via 
> use-livecode" <use-livecode-bounces at lists.runrev.com on behalf of 
> use-livecode at lists.runrev.com> wrote:
>
>    Thanks, I was afraid of that. I'll see if I can bump the bug report for
>    attention.
>
>    On 1/30/19 5:49 PM, Terry Judd via use-livecode wrote:
>> Not much of a workaround I'm afraid, but for a recent app (iOS and Android) 
>> I got rid of the native scroller and used the touch messages to both scroll 
>> the object and detect the swipes.
>> Terry...
>
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