Adaptive Import-dialog

[Schmiddiii]

Licensing

• I confirm that this is either my code or was released under the terms of a GPLv3-or-later compatible license. Also I agree to release it here under the terms of the GPLv3-or-later.

Description

This exchanges the dialog to be a AdwMessageDialog. The transient-for property is still set, but I am still unsure it applies.

Linked Issue

Relates to #95.

[TheEvilSkeleton]

It's a good start so far.

I have a couple of suggestions:

• File pickers aren't transient with the parent window with the current MR, so I suggest to do so.
• File pickers should only open appropriate file types by default. If I recall correctly, NewPipe exports JSON files. So, to import NewPipe list, the file picker should filter JSON. I believe it's this one https://docs.gtk.org/gtk4/property.FileChooser.filter.html.
• File pickers don't have a title, so the title bar is entirely empty.
  
  For NewPipe, I suggest to call it "Select NewPipe subscription file". For YouTube, I don't know exactly what we're supposed to import.

[Schmiddiii]

I have applied your suggestions. FileFilters were already in use and worked for me (NewPipe: JSON, YouTube: CSV).

[TheEvilSkeleton]

Huh, sorry for that then. I was really confused by the file picker displaying "(None)" in the filter list.

That said, I just tested the artifact and it looks like the file pickers still aren't transient with the parent window.

[Schmiddiii]

I just checked the docs again, and I think what you are refering to as transient is transient and modal:

Sets a window modal or non-modal.

Modal windows prevent interaction with other windows in the same application. To keep modal dialogs on top of main application windows, use gtk_window_set_transient_for() to make the dialog transient for the parent; most window managers will then disallow lowering the dialog below the parent.

Update: I now updated the MR to also make things modal.

[TheEvilSkeleton]

OH, sorry for saying the wrong term all along! 😅 I tested the build artifact and I can confirm that filepickers are now modal.