How to wait a function finishes and pass variable between files in Roku BrightScript

Question

I'm building a Roku channel and I'm facing a problem where I need a function to finish in order to run the lines afterwards & also I cant figure how to access a variable between components, this is the flow I have:

file1.brs

MainFunction.observeField("itemSelected", "func1") -first wait for this to finish
MainFunction.observeField("itemSelected", "func2") -then run this

sub func2()
    print var1
end sub

file2.brs

sub func1()
    var1 = (get content from some database)
end sub

Answer 1

Observers all fire independently of each other, so you will need to call func2 from inside func1.

Also, every roku component has its own copy of m, which is a global AA unique for each instance of the component. (similar to this in other languages). So you could share data between func1 and func1 like this:

file1.brs

MainFunction.observeField("itemSelected", "func1")

sub func2()
    print m.var1
end sub

file2.brs

sub func1()
    m.var1 = (get content from some database)
    func2()
end sub