Collect metadata on file transfer to pass to pending transfer widget #2

What is expected can be read from the following UI file:

https://git.vvvvvvaria.org/rra/dropship/src/branch/main/pendingTransmissions.ui

Need to handle:

Cancel the running transfer task (when X clicked)
Name of the file, size of the file
Transfer code
???

I did an attempt at getting it to work with a minimal and naive implementation (see 3b8fb66032 on pendingUI branch) but getting errors I don't know how to interpret.

dropship.py:105: PyGTKDeprecationWarning: Using positional arguments with the GObject constructor has been deprecated. Please specify keyword(s) for "homogeneous, spacing" or use a class specific constructor. See: https://wiki.gnome.org/PyGObject/InitializerDeprecations
  status = pendingTransmissions(fpath, self.transfer_code)
Traceback (most recent call last):
  File "dropship.py", line 105, in on_drop
    status = pendingTransmissions(fpath, self.transfer_code)
  File "/usr/local/lib/python3.7/dist-packages/gi/overrides/__init__.py", line 319, in new_init
    return super_init_func(self, **new_kwargs)
TypeError: could not convert value for property `spacing' from str to gint

Based on fef71be702/minigalaxy/ui/gametile.py and fef71be702/minigalaxy/ui/library.py (L110) it should be possible to do it the proper way.

Here's a helper on how to cancel a task:

https://stackoverflow.com/a/60675826

Soooo, nearly there, I think! With https://git.vvvvvvaria.org/rra/dropship/src/branch/main/dropship/dropship.py#L131-L134, I currently see:

➜  dropship (main) ✔ poetry run dropship
Traceback (most recent call last):
  File "/home/decentral1se/.cache/pypoetry/virtualenvs/dropship-81zsWiEI-py3.8/lib/python3.8/site-packages/gi/_gtktemplate.py", line 31, in connect_func
    template_inst.__gtktemplate_handlers__.add(handler_name)
AttributeError: 'ListBoxRow' object has no attribute '__gtktemplate_handlers__'
Traceback (most recent call last):
  File "/home/decentral1se/.cache/pypoetry/virtualenvs/dropship-81zsWiEI-py3.8/lib/python3.8/site-packages/gi/_gtktemplate.py", line 31, in connect_func
    template_inst.__gtktemplate_handlers__.add(handler_name)
AttributeError: 'ListBoxRow' object has no attribute '__gtktemplate_handlers__'
Traceback (most recent call last):
  File "/home/decentral1se/.cache/pypoetry/virtualenvs/dropship-81zsWiEI-py3.8/lib/python3.8/site-packages/gi/_gtktemplate.py", line 95, in <lambda>
    lambda s: init_template(s, cls, base_init_template)
  File "/home/decentral1se/.cache/pypoetry/virtualenvs/dropship-81zsWiEI-py3.8/lib/python3.8/site-packages/gi/_gtktemplate.py", line 118, in init_template
    raise RuntimeError(
RuntimeError: Handler 'copy_transfer_code' was declared with @Gtk.Template.Callback but was not present in template

So, I think we need to wire up some connect(...) calls like we do in Window and the template? I am not sure what works here since I do not know if the handling of these callbacks is like the signal handlers?

Also, when I commented these out, I still couldn't get a transfer to show. I tried called show() on the self.pending_transfer_list but that didn't work either?

Also see #1.

That's done! ⛅