Tkinter Canvas inheritance

[Frank Niessink]

Markus von Ehr <vonehr at ira.uka.de> wrote:
> 
> When I change the Code and create the image in the main function,
> there's no problem, it works well. How can I do it in the constructor
> and why doesn't it work????

You need to keep a reference to the image else it gets garbage collected.

Change:
>        slider = PhotoImage(file="button.gif")

into:
>        self.slider = slider = PhotoImage(file="button.gif")

Cheers, Frank
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