Roku Developer Program

[dynamitemedia]

I tried that and got this error

122: End Function
/tmp/plugin/MNAAAAvBlem8/pkg:/source/appPosterScreen.brs(106): runtime error e7:
 Array operation attempted on variable not DIM'd.

106:              if showList[msg.GetIndex()].action = "next" then

Backtrace:
Function showposterscreen(screen As Object, category As Object) As Integer
Function displaycategoryposterscreen(category As Object) As Untyped
Function showhomescreen(screen As Untyped) As Integer
Function main() As Void

I have to say that is a new error i have never seen

[TheEndless]

Sorry.. should be:

showList = m.Screen.GetContentList()
if showList[msg.GetIndex()].action = "next" then

[dynamitemedia]

Thanks endless after going crazy over where a "end if" goes i finally got to it but i had to change it to:

showList = screen.GetContentList()
if showList[msg.GetIndex()].action = "next" then

But Not sure this is even feasible the more i look at the logic of it, at least with the video player example

[jbrave]

Most of the logic of my app does not use that encapsulation stuff that theEndless does, it mostly relies on integer variables and roarrays to determine where it is at in the program. For implementing this aspect, what I did was to add to each poster object, whether dynamically created from xml or created manually, and do this:

posterobj=CreateObject("roassociativearray")
posterobj.Title=object.GetnamedElements("blah").GetText()
posterobj....
posterobj.action="Previous"
return {poster:posterobj}

then in my main loop when figuring out which action to perform in my if then:

itemindex=msg.getindex()
if poster[itemindex].action="previous"
then
blah blah
end if

hope that helps
don't know if that helps

[jbrave]

ps, really want to understand how to build my apps using object encapsulation, will ask some questions when I have time.

[dynamitemedia]

I don't think i'm following you Jbrave 😞

can you do the " << >> " pagination style using the xml feed?

[jbrave]

When I'm parsing the xml feed, of which I only grab 20 items at a time, I add one more value that is not in the feed to each posteritem, which is

action="play"

I have a calculation I do to see if any paging has been done. If it has not I add an "empty" item that pretty much just contains an image and action="next" (in TheEndless way of doing it, he would probably have {action:"next"}
If there has been any paging, I have an index variable that controls the offset from the top of the xmllist, if it is greater than 0 then I also add an action="previous" on the beginning of the posterlist.

in my if/then statements I check all my indexes and also the action - action="play" means it is a media item, action="none" means there was a server error and there is a bad item, action="previous" or "next" means add 20 or subtract 20 from the offset and get the next batch of poster items from the server.

- Hope that helps.

- Joel

[dynamitemedia]

"TheEndless" wrote:
Sorry.. should be:

showList = m.Screen.GetContentList()
if showList[msg.GetIndex()].action = "next" then

ok so what is this error anyways i just found i am getting it again

[TheEndless]

Which error is that? The "variable not DIM'd" error? That means you're attempting to use a variable that was never declared previously.

[dynamitemedia]

ok thanks i never saw it before...