[REBOL] Re: draw has no access to the current face
From: gscottjones:mchsi at: 29-Sep-2002 13:04
From: "Gregg Irwin"
> Hi Patrick,
>
> << Unfortunately face/user-data is unknown in this block.
> Is there a way to access the face object here? That is my question ! >>
>
> I don't think so. I'm certainly no guru in this area, but I just
> compose/modify my draw blocks and update them myself, then show the face,
> rather than putting dynamic elements directly in them for evaluation.
>
> I don't know if you want to do it in REDRAW though, since that can get
> called quite a lot, generating a lot of data that needs to be recycled.
Hi, Patrick, (Gregg,)
I agree with Gregg. You could use your basic idea, but let init do the
swapping, since it is only called once. The only way that I am familiar
with appending init is as follow:
db: stylize [
draw-button: box 24x24 with [
effect: [
draw [pen black fill-pen x-color circle 12x12 10]
]
user-data: 'white
append init [
replace effect/2 'x-color user-data]
]
]
draw-layout: [
styles db
h2 "Draw buttons"
across
r-btn: draw-button [ print "hey, I'm red"] with [user-data: 'red]
b-btn: draw-button [ print "hey, I'm blue"] with [user-data: 'blue]
y-btn: draw-button [ print "hey, I'm yellow!"] with [user-data: 'yellow]
g-btn: draw-button [ print "hey, I'm green!"] with [user-data: 'green]
]
view center-face layout draw-layout
Some other clever chap may know how to append init with the style form
within a layout block.
:-)
--Scott Jones
