Hi Silvia,
Gabriele explained well, but I would just like to clarify a few things:
- LAYOUT produces a *face* which contains other faces depending
on the VID dialect you provide.
- It is actually the VIEW function which makes the containing face
into a window face, although LAYOUT may do a few things to prepare
it for this purpose.
That is why we create windows this way:
; create a face containing a button face
window: layout [button "example"]
; I have called the new face WINDOW, but it is not
; really a window yet..
view window
; now WINDOW is actually a window face.
To see the basics of how LAYOUT and VIEW work, we can mimic
their behaviour at a low level (the "face level"):
; This is like LAYOUT
window: make face [offset: 30x50]
; WINDOW is just a blank face - no button inside.
; (you will have to do that yourself)
; This is like VIEW
append system/view/screen-face/pane window
show system/view/screen-face
do-events
The gray window that pops up does not look the same as the top
example, but the idea is the same.
Regards,
Anton.
> Hi Silvia,
>
> On Monday, October 31, 2005, 6:40:31 PM, you wrote:
>
> SB> What is the difference between a face and a layout? I can't understand
> SB> exactly how can I use them and if using one of them instead
> of the other
> SB> produces different results.
>
> A face is a rectangular section of the screen; a window is a face
> too. A face can contain other faces inside it.
>
> LAYOUT is a function that produces a window face with other faces
> in it based on the VID dialect you provide. So, the result of
> LAYOUT is actually a face.
>
> LAYOUT, taking a dialect block, is much more high level that
> creating faces directly, which are more low level.
>
> Hope this gets you started. :)
>
> Regards,
> Gabriele.
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