[REBOL] Re: Object extension / clipboard / scrolling images
From: atruter::hih::com::au at: 12-Mar-2002 17:06
Three subjects in one . . . sorry ;)
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<SNIP>The issue, as I understand it, is that you can't add new functions
and
variables to TIMER. It's set of words is fixed when it is created and
cannot
be extended. You would have to create a new object, based on TIMER, in
order
to add new words to it.</SNIP>
Have I missed something here? I "extend" objects all the time in the
following manner . . .
timer: make object! [
time: does [print now/time]
]
timer: make timer [
date: does [print now/date]
]
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On the calls for binary clipboard support and the argument that it might not be cross-platform
. . .
If the following were possible:
view layout [
image clipboard:// ; either default to last item or some sequence qualifier
]
or even
save %image.clp clipboard://
then all sorts of useful functionality (like still and live picture
grabbing) become possible. Even an implementation where REBOL can read from
(and only the "last" item in the clipboard) but not write to would be very
useful as getting data in the first place is often more problematic than
what is done with it (where we at least have REBOL programmatic choices).
If this "extended clipboard" functionality is only available with /View
then it would by definition be as cross-platform as /View is (ie. if I have
a GUI I have some basic facility to "cut & paste" binaries). The fact that
different OS's have different means of getting this data to and from the
clipboard
should be irrelevant to REBOL. If I want to create a REBOL
screen grabber then the capture initiation ("Print Screen" under Windows)
is external to REBOL, it is the reference to that captured data under REBOL
I am then concerned with.
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Another simple scrolling image demo (called "Image Demo") is at my rebsite
(Dobeash). Uses crop not offset though, as it also handles zooming.
Regards,
Ashley
