about dialog and GTK+ 3

[az0]

@moimael: Would you please take a look? I am using Ubuntu 14.04, which is a relatively new distribution. I would prefer not to lose support for any new systems like this.

Traceback (most recent call last):
  File "/bleachbit/bleachbit/Application.py", line 129, in about
    builder.add_from_file('data/AboutDialog.ui')
gi._glib.GError: data/AboutDialog.ui: required gtk+ version 3.12, current version is 3.10

[moimael]

Ok, I develop on Fedora 21 which has 3.14. Should I assume that GTK 3.10 is our minimum supported version ?

[az0]

Fedora is easy because it goes EOL so fast. Besides the about dialog, in general what would it take to support gtk+ 3.4 or at least provide some graceful fallback without major loss of functionality?

Here are some actively supported and popular distributions:

• Ubuntu 14.04 goes EOL April 2019, has gtk+ 3.10.8
• Ubuntu 12.04.5 LTS goes EOL April 2017, has gtk+ 3.4.1
• Latest Debian 7 (Wheezy) has gtk+ 3.4.2
• openSUSE 13.1 has gtk+ 3.10.2
• openSUSE 12 is EOL next month (so no problem)

Reference:
http://distrowatch.com/table.php?distribution=ubuntu
http://distrowatch.com/table.php?distribution=debian
http://distrowatch.com/table.php?distribution=opensuse
https://en.opensuse.org/Lifetime
https://wiki.ubuntu.com/Releases

I'll open an issue to test more with GTK+ 3.4.

[az0]

Works much better lately

Tested with Ubuntu 16.04, GTK 3.18.9, commit ede855c