That's an excellent example. In the case I just wrote about, using
Tcl's tag and move could reduce 500 KB/sec of Tcl code to 5KB/sec.
.hc
On Aug 26, 2011, at 9:46 PM, Patrice Colet wrote:
This is very slow because everything selected is moving, this method
makes a very slow dragging,
if a rectangle is drawn just to show up area of selection that is
been moving, that would be very fluid,
and it shouldn't so hard to implement. I guess it would even be
possible to capture the selection as an image,
so we would drag just an image, and then there would be no
difference.
something like this:
<B1-motion> ---> capture area to move, copy in clipboard selected
objects and args, build an image or a rectangle, delete the
selection, and move the image or rectangle.
<B1-Release> ---> delete the image or rectangle, and paste the
selected object(s).
----- "João Pais" <jmmmp...@googlemail.com> a écrit :
tcl/tk behaves very slowly for fast calls, such as when dragging an
array
of considerable size, or a big group of objects? afaik this is
something
that could be improved in the present platform, but how better could
it be
when using another gui framework?
It might be a good idea to list the problems with tcl/tk so we can
weigh
them against the difficulty of using a different GUI toolkit. The
problems I see are:
* difficult to implement a decent zoom function for a canvas
* can't display png without the Img library (included in 8.6)
* can't do alpha transparency
Of the three I listed, I'm mostly interested in the first as it
means
that (without prior planning) it's hard to take a patch you've been
working on at font size 10 and display it adequately over a
projector,
for example. (If there's a work around I'd like to know it.)
I'd like to hear others, but I'm mostly interested in problems with
tcl/tk >= 8.5 as the GUI.
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Patrice Colet
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