On Aug 14, 2010, at 5:49 PM, Peter Otten wrote:
> Chris Hare wrote:
>
>> Thanks Peter. I threw away what I started with and merged your code into
>> my class:
>>
>> class externalLoopDisplay:
>>
>> def show(self):
>> main.logging.debug("externalLoopDisplay.show:","start")
>>
>> self.window = Tk()
>>
>> self.btnClose = Button(self.window, text="Close",
>> command=self.window.destroy,
>> bg=backColor,highlightbackground=warnColor,
>> highlightcolor=okColor) self.btnClose.grid(row=0, column=2)
>> self.label = Label(self.window) self.label.grid(row=1, column=0,
>> columnspan=3)
>> dirName = getRadarPath() + "/net" + str(netNumber.get()) # e.g.
>> .../Radar/net17/net17-YYYYMMDDHHMMSS.gif
>> self.imagefiles = glob.glob(dirName + "/*.gif")
>> self.imagefiles = cycle(self.imagefiles)
>> self.window.after_idle(self.next_image)
>>
>> def next_image(self):
>> imagefile = next(self.imagefiles)
>> image = Image.open(imagefile)
>>
>> w, h = image.size
>> image = image.resize((600, 550*h//w))
>>
>> self.label.image = self.label["image"] =
>> ImageTk.PhotoImage(image=image) # <==== bails here
>> self.window.title("Now showing %s" % os.path.basename(imagefile))
>>
>> self.window.after(2000, next_image)
>>
>>
>> I marked where the code bails with an error saying pyimage2 doesn't exist.
>> All of the images exist and worked just fine with your standalone script.
>>
>> Suggestions?
>
> Google says you are calling Tkinter.Tk() more than once where you should
> instead use Tkinter.Toplevel(). As you didn't post that part of the code
> it's hard to verify, but when I add a second
>
> root = tk.Tk()
>
> to my example script I get a very similar exception:
>
> Exception in Tkinter callback
> Traceback (most recent call last):
> File "/usr/lib/python2.6/lib-tk/Tkinter.py", line 1413, in __call__
> return self.func(*args)
> File "/usr/lib/python2.6/lib-tk/Tkinter.py", line 498, in callit
> func(*args)
> File "cycle_image.py", line 16, in next_image
> label.image = label["image"] = ImageTk.PhotoImage(image=image)
> File "/usr/lib/python2.6/lib-tk/Tkinter.py", line 1212, in __setitem__
> self.configure({key: value})
> File "/usr/lib/python2.6/lib-tk/Tkinter.py", line 1205, in configure
> return self._configure('configure', cnf, kw)
> File "/usr/lib/python2.6/lib-tk/Tkinter.py", line 1196, in _configure
> self.tk.call(_flatten((self._w, cmd)) + self._options(cnf))
> TclError: image "pyimage1" doesn't exist
>
> By the way: for future posts please remember to cut and paste the traceback,
> don't paraphrase the error message.
>
> Peter
> --
> http://mail.python.org/mailman/listinfo/python-list
Yes - you are bang on.
Thanks. One final question if I may, how would you suggest I handle checking
for new files and adding them to the list? For example, if the loop is playing
and a new image is added, how can I detect it and then refresh the list of file?
I am stuck on that part with this new approach.
Chris
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