Kivy FileChooserListView - Modifying the display of the file list? - python-3.x

Question

I was wondering if anyone knew how to add numbers (purely for reference) to Kivy's FileChooserListView such that the file list is displayed like:
# Name Size
1. File 1 2k
2. File 2 2k
3. File 3 2k
...

Answer 1

OK, it's not a perfect answer but here's what I tried to do:
First thing was to edit kivy's default filechooser.py file. Find this section:
ctx = {'name': basename(fn),
'get_nice_size': get_nice_size,
'path': fn,
'controller': wself,
'isdir': self.file_system.is_dir(fn),
'parent': parent,
'sep': sep}
and change it to:
ctx = {'name': basename(fn),
'get_nice_size': get_nice_size,
'path': fn,
'controller': wself,
'isdir': self.file_system.is_dir(fn),
'parent': parent,
'sep': sep,
'index': index}
Next up, find kivy's style.kv file (you could probably create a custom class to do this but I was being lazy!). Look for this section [FileListEntry#FloatLayout+TreeViewNode]:
I then took this part:
Label:
id: filename
text_size: self.width, None
halign: 'left'
shorten: True
text: ctx.name
and changed it to:
Label:
id: filename
text_size: self.width, None
halign: 'left'
shorten: True
text: "{}. {}".format(ctx.index, ctx.name)
As per my comment above, it seems to throw an error if you try to navigate folders.
It may be the case that one of the kivy experts knows a better way of doing this.

Answer 2

I know this is quite late but to complete the answer of elParaguayo, you also have to replace the lines
pardir = self._create_entry_widget(dict(
name=back, size='', path=new_path, controller=ref(self),
isdir=True, parent=None, sep=sep,
get_nice_size=lambda: ''))
with
pardir = self._create_entry_widget(dict(
name=back, size='', path=new_path, controller=ref(self),
isdir=True, parent=None, sep=sep,
get_nice_size=lambda: '', index= 0))
(be careful there are 2 occurences of these lines). This is what throws the exception when you navigate: the parent directory ../ is not created with the same lines as the other files.
Also, I would advise to create a local copy of filechooser.py and style.kv and load them into your app instead of modifying the source code of the kivy modules.