Very nice tool for reading webtoons locally but there are a few problems.

First (Fix ordering)

I understand that it gets the images by the OS alphabetic sorting.
But it's very common that chapters are named as
1.jpg ... 9.jpg, 10.jpg, 11.jpg

As of right now (ver1.1). I've printed to order and WebtoonReader actually loads them like.
1.jpg - 10.jpg - 11.jpg - 12.jpg - 13.jpg - 14.jpg - 15.jpg - 16.jpg - 17.jpg - 18.jpg - 19.jpg - 2.jpg - 20.jpg

I fixed this by trying to do a numeric reordering at the Fill function first. So the common cases where the pages are just numbers would be correctly ordered. You just need to import re at the beginning of the file and change the fill function.

def fill(self):
    if os.path.exists(self.path):
        files = [f for f in os.listdir(self.path)]
        
        search = lambda x: re.search(r'\d+', x)
        if_search = lambda x: int(search(x).group()) if search(x) else float('inf')
        files_sorted = sorted(files, key=if_search)
        
        # Gets all images from directory and adds to list
        for name in files_sorted:

Second (HUGE RAM USAGE)

This is by far the biggest problem.
This tool is too RAM intensive.

You might not have noticed if you only tried it with small chapters. I myself only noticed it when my PC started to shutdown after trying to open a webtoon folder with 300+ pages.

Loading a 100 pages 100 mb sized webtoon is actually consuming 8.5 Gigs of RAM

I'm not sure how Tkinker handles it canvas. But it might be necessary to dynamically load the pages to solve this issue.
I don't think there is an easy way out of this.

Third (Invert mouse drag)

Just a suggestion. Maybe add a invert mouse drag options.

I actually prefer to scroll upwards to I changed it manually the yview to -deltaY

def update_scroll(self, event):  
    deltaX = event.x - self._starting_drag_position[0]
    deltaY = event.y - self._starting_drag_position[1]
    self.canvas.xview('scroll', deltaX, 'units')
    self.canvas.yview('scroll', -deltaY, 'units')
    self._starting_drag_position =  (event.x, event.y)

Edit: PS

I also deactivated the load last chapters feature here.
As it takes a while to load big chapters, the programs appears stuck before you can even select the chapter you actually want to read, so I personally don't like this feature. An option to disable this might be nice for someone who doesn't know how to change the code.

And maybe add a progress bar to show how far along the image processing is?
I put a print on the console for myself here just to know how far along it is.
For example. A 35mb, 95 pages compressed chapter takes about 20-30 seconds to load here.

The provided .exe in the releases is too big (27mb).
Using an almost clean pip I can generate a 10mb sized .exe here.

Even using pyinstaller --path and passing the virtualenv files, it still uses some of the packages installed on the main python installation for some reason.

Here is the command I'm using:
pyinstaller.exe --onefile -i='icon.ico' WebtoonReader.py --paths /d/Programs/WebtoonReader/WebtoonReader/webtoon_env/Lib/site-packages/

I was getting a 20Mb~ .exe file.
But when I uninstalled numpy from my global python 310 installation, the resulting .exe reduced to a 10 Mb file.

Not sure if this is intentional or a bug from pyinstaller. But I always thought if you specified a --paths arguments it should mean you don't want to use ANYTHING from the global python installation that is not vitally necessary. But that is not the case it seems.

Just creating this issue to keep a note that this problem exists and the final .exe can be reduced in size by quite a bit if you wanted it to.

It seems the scrollbars are not updated correctly when loading the next X images at the end of the scroll.

This can better be noticed if you follow this steps:

1. Put the images to load to 2.
2. Put 2 images named '1.jpg' and '2.jpg' with a size of 500x100px each
3. Put 2 images named '3.jpg' and '4.jpg' with a size of 500x250px each

This is quite an easy fix.
You just need to make sure to update the scrollbar size by executing this 2 lines after you print the images to the canvas.

self.v_scroll.config(command=self.canvas.yview)
self.canvas.config(scrollregion=self.canvas.bbox('all'))

PS: Great updates. It's nice to see how fast you solved the previous issues.

Just tried running it and it just outputs the following error:

Traceback (most recent call last):
  File "WebtoonReader.py", line 385, in <module>
  File "WebtoonReader.py", line 47, in __init__
  File "CustomScroller.py", line 64, in __init__
  File "CustomScroller.py", line 206, in update_title_name
FileNotFoundError: [WinError 3] The system cannot find the path specified: ''
[13224] Failed to execute script 'WebtoonReader' due to unhandled exception!