Mailing List Archive: Forms with separate context

[REBOL] Forms with separate context

From: davidegessi:tin:it at: 15-Dec-2002 18:19


Hi all,
giving the following code:

<code>

REBOL []

chat: make object! [
	nome: copy ""
	frm: [
		titolo: h2 (join "Chatting with: " nome)
		area
	]
	show: does [
		view/new frm-chat: layout compose frm
	]
]

chat1: make chat [
	nome: "Davide"
]

chat2: make chat [
	nome: "Luca"
]

view layout [
	button "Show Davide" [chat1/show]
	button "Show Luca" [chat2/show]
	button "Print values" [
		print chat1/titolo/text
		print chat2/titolo/text
	]
]

</code>

this raise an error when I push the "print values" button...
After this example I understood that the context of "titolo" isn't the
object chat, but it's the global context, and I have only one var "titolo".
Now my big question is: what is the best method to have a collection of
similar form, with separate context for each of them ?

I have seen that in the code of the jabber client  "Maoww.r" (my rebol
bible) this is done using "do" with a string built appending the ID of the
form to every control name, like this:

do rejoin [
  nome {titolo: h2 (join "Chatting with: " nome)}
]

so I could modify my code:

button "Print values" [
	print Davidetitolo/text
	print Lucatitolo/text
]

But I would investigate if a better method exists.
Hope my question is clear, my english is poor :(
Thanks in advance.

Ciao

Davide