Hi,
On Tue, 19 Jan 2016 15:56:00 +0100
ingo <ingoo...@gmail.com> wrote:
> I'm trying to create a simple tabbed editor and merged two examples
> found on the web. One of those is the one with the closing images on
> the tabs. In the proces of understanding I somehowe lost the images on
> the tabs but not the fuctionality of clicking on the right position of
> the tabs.
>
> What is going wrong?
Looks like your image data is being garbage-collected.
This is a very common pitfall in Tkinter.
This is the problematic part of your example code:
>
> def _create_panel(self):
>
> imgdir = os.path.join(os.path.dirname(__file__), 'img')
> i1 = PhotoImage("img_close", file=os.path.join(imgdir,
> 'close.gif'))
> i2 = PhotoImage("img_closeactive", file=os.path.join(imgdir,
> 'close_active.gif'))
> i3 = PhotoImage("img_closepressed", file=os.path.join(imgdir,
> 'close_pressed.gif'))
Here you fail to keep references to the PhotoImage objects, so immediately
after the _create_panel() function is done, the image data will be
garbage-collected.
To avoid this you can change your code like this:
def _create_panel(self):
imgdir = os.path.join(os.path.dirname(__file__), 'img')
self.i1 = PhotoImage("img_close",\
file=os.path.join(imgdir, 'close.gif'))
self.i2 = PhotoImage("img_closeactive",\
file=os.path.join(imgdir, 'close_active.gif'))
self.i3 = PhotoImage("img_closepressed",\
file=os.path.join(imgdir, 'close_pressed.gif'))
(...)
You may look here for a brief explanation on this topic:
http://effbot.org/pyfaq/why-do-my-tkinter-images-not-appear.htm
Best regards
Michael
.-.. .. ...- . .-.. --- -. --. .- -. -.. .--. .-. --- ... .--. . .-.
If I can have honesty, it's easier to overlook mistakes.
-- Kirk, "Space Seed", stardate 3141.9
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