layout question
[1/9] from: cavallieri::carlo::gmail::com at: 25-Nov-2005 15:19
First: Hi All
Second:
these are my first step on the REBOL world, so consider me a newbie.
In my "way to understand REBOL" i've tried to see what actually "layout" does,
so i type "source layout" and there are some line of code that i've
not understand:
new-face: make any [
all [parent object? new new]
all [parent word? new get-style new]
vid-face
]
so, it basically try to set "new-face" to the parent or parent style
if a /parent is used right?
why i need to type "new new" ?
What is "vid-face", where is defined?
-- Carlo
[2/9] from: volker:nitsch:gm:ail at: 25-Nov-2005 15:32
On 11/25/05, Cavva <cavallieri.carlo-gmail.com> wrote:
> First: Hi All
> Second:
<<quoted lines omitted: 11>>
> if a /parent is used right?
> why i need to type "new new" ?
all [(parent) (object? new) (new)]
> What is "vid-face", where is defined?
>
probe first system/view/vid
> -- Carlo
> --
> To unsubscribe from the list, just send an email to
> lists at rebol.com with unsubscribe as the subject.
>
--
-Volker
Any problem in computer science can be solved with another layer of
indirection. But that usually will create another problem.
David
Wheeler
[3/9] from: lmecir:mbox:vol:cz at: 25-Nov-2005 15:38
Cavva napsal(a):
>First: Hi All
>Second:
<<quoted lines omitted: 11>>
>if a /parent is used right?
>why i need to type "new new" ?
this is hardly "new new". I think, that you need to know how ALL works.
Here is what is the meaning of all [parent object? new new]:
1) it checks PARENT. 2) If true, it checks, whether NEW is and object.
3) If true, it yields NEW as result.
A more understandable way of doing it might be:
new-face: make case [
all [parent object? new] [new]
all [parent word? new] [get-style new]
true [vid-face]
]
[4/9] from: cavallieri:carlo:g:mail at: 25-Nov-2005 15:47
new new
understood, thanks
So, "vid-face" is a local variable defined in "system/view/vid" right?
but i still don't understand why i can symply refer to "vid-face"
without saying that is under "system/view/vid"
if in the console i type "vid-face" i get an error ..
--Carlo
2005/11/25, Ladislav Mecir <lmecir-mbox.vol.cz>:
[5/9] from: lmecir:mbox:vol:cz at: 25-Nov-2005 16:16
Cavva napsal(a):
>"new new" understood, thanks
>
>So, "vid-face" is a local variable defined in "system/view/vid" right?
>
>but i still don't understand why i can symply refer to "vid-face"
>without saying that is under "system/view/vid"
>
>if in the console i type "vid-face" i get an error ..
>
>--Carlo
>
Check this:
my-object: make object! [
a: 112233
set 'f func [] [a]
]
now if you do:
f ; == 112233
, but A is local to my-object
[6/9] from: cavallieri::carlo::gmail::com at: 25-Nov-2005 16:42
Ok, but with " set 'f " you "expose" f in the global context, tell me
if i'm wrong,
so now i can type "f" at the cosole because "f" is now a "global function" ...
but "vid-face" is different, i think only "layout" or "view" (console don't)
can see it but i don't understand why,
nor with "source view" or "source layout" i can see something refer to
system/view/vid/vid-face
...
so i'm still looking in the "wrong place" but were's the right one ?
2005/11/25, Ladislav Mecir <lmecir-mbox.vol.cz>:
[7/9] from: volker:nitsch:gmai:l at: 25-Nov-2005 18:11
On 11/25/05, Cavva <cavallieri.carlo-gmail.com> wrote:
> Ok, but with " set 'f " you "expose" f in the global context, tell me
> if i'm wrong,
> so now i can type "f" at the cosole because "f" is now a "global function
> ...
Right. You are close. :)
> but
vid-face" is different, i think only "layout" or "view" (console don't
> )
> can see it but i don't understand why,
Look at the "a" in ladislavs example!
> nor with "source view" or "source layout" i can see something refer to
> "system/view/vid/vid-face" ...
<<quoted lines omitted: 36>>
> To unsubscribe from the list, just send an email to
> lists at rebol.com with unsubscribe as the subject.
--
-Volker
Any problem in computer science can be solved with another layer of
indirection. But that usually will create another problem.
David
Wheeler
[8/9] from: cyphre:seznam:cz at: 25-Nov-2005 18:30
----- Original Message -----
From: "Cavva" <cavallieri.carlo-gmail.com>
To: <rebolist-rebol.com>
Sent: Friday, November 25, 2005 4:42 PM
Subject: [REBOL] Re: layout question
> Ok, but with " set 'f " you "expose" f in the global context, tell me
> if i'm wrong,
> so now i can type "f" at the cosole because "f" is now a "global function"
> ...
>
right
> but "vid-face" is different, i think only "layout" or "view" (console
don't
> )
> can see it but i don't understand why,
>
> nor with "source view" or "source layout" i can see something refer to
> "system/view/vid/vid-face" ...
> so i'm still looking in the "wrong place" but were's the right one ?
>
You can't see it from "source view" or "source layout" because the SYSTEM
object(and all its content) is already loaded(and properly bind) in Rebol
interpreter during the 'startup sequence'(before you are able to use and
access it). You can see this only if you have Rebol SDK sources. There is
something like:
system/view/vid: context [
.....
.....
.....
vid-face: make face [
....
]
set 'layout func [...][
...
]
...
...
] ;end of system/view/vid
So from this you can see that the LAYOUT function is defined as global when
it is 'loaded' in the SYSTEM/VIEW/VID context.
regards,
Cyphre
[9/9] from: cavallieri::carlo::gmail::com at: 25-Nov-2005 19:14
ahhh.. the light! i can see the light!! :)
thanks Cyphre,
and also Volker and Ladislav
2005/11/25, Cyphre <cyphre-seznam.cz>:
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