Adding GUI items from a series in Red Language

Question

I want to add GUI items from a series. I am trying following code but it does not work:

mylist: ["first" "second" "third" "fourth" ]

view[
    foreach i mylist [
        text i  ]]

The error is:

*** Script Error: VID - invalid syntax at: [foreach ll mylist]
*** Where: do
*** Stack: view layout cause-error 

Where is the problem and how can it be solved? Thanks for your answers.

Answer 1

Remember that...

view [... what goes in here...]

...is a dialect, it is not regular code. It's a special dialect that has some evaluative qualities, but the normal rules don't always apply.

Don't forget that a dialect is just a block of values like anything else in Red. You can pre-build it as such:

view collect [
    foreach i mylist [
        keep 'text keep i
    ]
]

You can stick a PROBE between VIEW and COLLECT there to see what you're generating and COLLECT/KEEP gives you a lot of scope for tuning the values that end up in your view spec.

Answer 2

Your problem is you are mixing dialects. You have a VID dialect inside the View block, but you're also using the DO dialect there as well which is not understood by View.

At least in Rebol you would add a do block as an initialization sequence inside the VID dialect eg.

view [
   VID dialect goes here ...
   do [ do dialect stuff that could initialize gui elements go here ]
]