Gregory Pittman venit, vidit, dixit 2021-03-02 21:46:38:
> On 3/2/21 2:09 PM, Jean Ghali wrote:
> > Le 02/03/2021 à 19:41, Gregory Pittman a écrit :
> >> Has anyone had any luck using getFirstLinkedFrame() and
> >> getNextLinkedFrame()?
> >>
> >> I have been trying to write a script that would march down a set of linked
> >> frames, so I could analyze the content. getFirstLinkedFrame() seems to
> >> work as expected, but not getNextLinkedFrame(). The script spins and spins
> >> and spins and won't quit.
> >> The documentation says that if you do this:
> >>
> >> textbox = scribus.getNextLinkedFrame()
> >>
> >> it returns None if there are no more, but what "value" is assigned to
> >> textbox in that case? I'm trying to stop execution of frame content
> >> analysis when it reaches that point.
> >> I even tried
> >>
> >> while (textbox):
> >>
> >> thinking that would evaluate to 0 if there were no more, but that doesn't
> >> work. Trying to put str(textbox) into a messageBox() doesn't work.
> >>
> >> Greg
> >>
> >
> > Here an example which loops across frames of a text chain and print the
> > name of each linked frame:
> >
> > textbox = scribus.getNextLinkedFrame("Text1")
> > while textbox is not None:
> > print(textbox)
> > textbox = scribus.getNextLinkedFrame(textbox)
> >
> Great! Thanks, Jean.
>
> The thing I didn't understand is the need for getNextLinkedFrame() to have an
> object inside the parentheses. Without that, it keeps going back to the
> initial frame that I selected before I ran the script.
"" (empty) means "selected frame", and getNextLinkedFrame("") gives you
the next frmae linked from the selected frame - without selcting that
next frame. Thus, repeated calls give the same frame.
So, this works as expected from the meaning of "" but it's not very
pythonic - "next" sounds much like the next method of an iterator. You
can turn it into one using a generator
def LinkedFrames(frame=None):
frame = scribus.getNextLinkedFrame(frame)
while frame:
yield frame
frame = scribus.getNextLinkedFrame(frame)
and then "for frame in LinkedFrames()" works as expected.
Simplifying with py3.10's ":=" is left as an exercise ;)
Cheers
Michael
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