Graham,
I don't use mobgui but instead I use tmControl for layout of iOS elements.
There are two types of scrolling lists possible in LC. The first is using
mobilePick by itself or use an option button (that uses the iOS mobilePicker).
The second is using either an LC field object or other objects like the list
field in tmControl but either of these needs to be in a group and the group can
now have an iOS scroller applied to it.
If you create a field that is very long and group it then select the group and
make it shorter than that field it will scroll. I can't remember if the group
needs locked or not. There are a couple of glitches to watch out for.
Here is parts of a script that controls a grouped field and an iOS scroller. A
mouseUp in the field can return the desired line etc.
local sScrollerId
on scrollerDidScroll pOffsetX, pOffsetY
lock screen
set the hScroll of group "InputScrollerGroup" to pOffsetX
set the vScroll of group "InputScrollerGroup" to pOffsetY
unlock screen
end scrollerDidScroll
on openCard
set the layerMode of group "InputScrollerGroup" of this card to "scrolling"
set the unboundedHScroll of group "InputScrollerGroup" to true
set the unboundedVScroll of group "InputScrollerGroup" to true
-- add items to a field "Counter" and have it grow to fit the contents
set the height of field "Counter" of this card to the formattedHeight of
field "Counter"
set the top of field "Counter" to the top of group "InputScrollerGroup"
set the threeDHilite of field "Lap Counter" to false
iphoneControlCreate "scroller", "InputScroller"
put the result into sScrollerId
put the rect of group "InputScrollerGroup" into tRect
iphoneControlSet sScrollerId, "rect", tRect
put the formattedHeight of field "Counter" into tHeight
iphoneControlSet sScrollerId, "contentRect", (0, 0, 0, tHeight)
iphoneControlSet sScrollerId, "indicatorInsets", (0,0,6,0)
iphoneControlSet sScrollerId, "visible", "true"
iphoneControlSet sScrollerId, "canBounce", true
iphoneControlSet sScrollerId, "declerationRate", fast
iphoneControlSet sScrollerId, "scrollingEnabled", true
iphoneControlSet sScrollerId, "canScrollToTop", true
iphoneControlSet sScrollerId, "delayTouches", true
iphoneControlSet sScrollerId, "vscroll", 0
set the vScroll of group "InputScrollerGroup" to 0
set the vScroll of field "Counter" to 0
focus on nothing
iphoneControlDo sScrollerId, "flashScrollIndicators"
end openCard
on closeCard
iphoneControlDelete "InputScrollerGroup"
end closeCard
-- Tom McGrath III
http://lazyriver.on-rev.com
3mcgr...@comcast.net
On Apr 4, 2012, at 12:31 PM, Graham Samuel wrote:
> In an iOS app I'm developing I would like to use a scrolling text list where
> the user can drag the whole list up and down (i.e. scroll the list) but can
> also select a line by touching it. This type of interaction is permitted in
> iOS: a simple example is the index of Apple's own Contacts app.
>
> I have looked at the latest iOS notes for LC5.5 (Scroller Control -
> UIScrollView) and I can't understand how the textual list (like an ordinary
> LC scrolling field) would come in to the scroller; I'm also just beginning to
> use MobGUI to introduce some native controls, and that has a scroller object
> too. It is complex and consists of a group into which it is possible to
> introduce such an LC field, but in that case it is sensitive to touches, but
> not to dragging/scrolling - I tried setting the parameter 'delay touches' but
> it didn't seem to change anything.
>
> Obviously I have missed some underlying concept here. The LC iOS doc says
> that a scroller isn't a container for other controls, but I don't know what
> that means. It seems a gnomic pronouncement rather on the lines of "Light is
> not a thing" or “Die Welt ist alles, was der Fall ist.” Sounds terrific, but
> what does it actually mean?
>
> I also tried reading the UIScrollView section of Apple's documentation. It's
> promising in a way (it mentions the need to do the kind of thing I'm talking
> about) but it doesn't help me enough to allow me to proceed.
>
> Does anyone know how to do this? I have asked MobGUI support, but I don't
> know how reactive they are.
>
> TIA
>
> Graham
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