> On 30 May 2019, at 5:01 am, J. Landman Gay via use-livecode
> <[email protected]> wrote:
>
> Thanks Monte, I did over-summarize. I'm not sure why it's going wrong, but it
> sounds like it's something I'm doing. I have a standard "createScroller"
> handler that I've been using for years, but I've never had to set the hScroll
> before. It's always been zero.
>
> In this case, I set the hScroll of the group to the formattedWidth of the
> group, which may be wrong.
The max scroll will be the formattedWidth of the group - the width of the group
unless you have unboundedHScroll true. I _think_ if it’s false then the engine
will automagically clamp that though.
> The engine seems to compensate though and sets the scroll as far as it should
> go. Then I call "createScroller" and pass the name of the group. The handler:
>
> command createScroller pName
> -- pName = the long ID of a grp
> put the rect of control pName into tRect
> put the hScrollBar of control pName into tHScroller
> put the vScrollBar of control pName into tVScroller
> put the hScroll of control pName into tHScroll
> put the vScroll of control pName into tVScroll
> set the hScrollBar of control pName to false -- remove fld scrollbars on
> mobile
> set the vScrollBar of control pName to false
> mobileControlCreate "scroller", pName
> mobileControlSet pName, "rect", tRect
> put ("0,0," & (the formattedwidth of control pName) & "," & the
> formattedheight of control pName) into tContentRect
> mobileControlSet pName, "contentRect", tContentRect
> mobileControlSet pName, "hScroll", 0
> mobileControlSet pName, "vScroll", 0
> mobileControlSet pName, "hIndicator", tHScroller
> mobileControlSet pName, "vIndicator", tVScroller
> mobileControlSet pName, "hScroll", tHScroll
> mobileControlSet pName, "vScroll", tVScroll
> mobileControlSet pName, "visible", true
> end createScroller
>
> I initialize both the group and the scroller to 0 before doing anything else,
> because when I wrote it I couldn't get them to align correctly otherwise. I
> should also probably mention that I'm using fullscreenMode "showAll" and the
> group is expanded beyond the borders of the card to fill the screen; i.e., it
> probably has a negative left margin and a wider right margin.
> When the scroller finally does scroll (after resetting itself) it scrolls too
> far at the left side by the number of pixels between the screen left and the
> card left, and cuts off the same amount on the right side.
>
> Can you see what I should change?
I’m really not sure at this stage. Have you tried logging the x,y values you
get in scrollerDidScroll? This may need a simple stack to reproduce it and an
email to support so we can figure out what’s up.
Cheers
Monte
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