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KDE Language Selector: Summer of Code 2010 project

Introduction:
This Google Summer of Code project will, if implemented, bring the KDE frontend
of Ubuntu's Language Selector dialog to feature parity with the GTK+ frontend.

It will also add a few additional nifty features, as well as integrate the
frontend further with the rest of KDE.

Major todo:
* Run as normal user:
  - Port writeLanguageSettings() from LanguageSelectorBase to a small helper
    app. It should copy the KDE language settings to /etc/default/locale
  - Patch the locale KCM with a button that runs this helper app as root via
    KAuth (PolicyKit)
  - Remove the "select" --mode from and the "Set as system default" button from
    qt-language-selector. Obsoleted by the above.
* Port to KCM:
  - Port qt-language-selector from a KApplication to a KCModule
  - Remove the existing patch from the Ubuntu packages for kdebase-runtime for
    launching qt-language-selector as it will be outdated by the above. We will
    still keep KDE's KCM around to set KDE's language and locale settings.

Todo:
* Control non-KDE, non-system lang/locale settings:
  - Currently, qt-language-selector's "select" mode will only set the entire
    system's default lang/locale. KDE currently only applies its lang settings
    to itself. Write something to the user's .bashrc to export his current
    KDE locale/lang settings to the rest of his session for non-KDE apps.
* Fine-grained language support installation options:
  - In the langpack installer/remover, add checkboxes for whether or not
    writing aids, fonts, and input methods are installed for various languages
  - Merge add/remove dialogs so this'll work
* Improved IM-support:
  - Get qt-language-selector to add the KIMPanel applet, if it works with IBus.
    Perhaps just implement it, but wait until IBus works with KIMPanel to
    enable it by default.
* Missing package notification enhancements:
  - Possibly use KNotify, as passivePopups were used in the past
  - Implement list of missing packages for the "missing language support" dialog
  - Add the ability to ignore missing support packages, for example if you don't
    care about a certain program or a certain language variation.
* Get language-selector to install kde-l10n-* packages when language-pack-* are
  installed

Minor todo:
* Rename to kde-language-selector
* Give the install/remove QListView a nice little filter bar, to save our poor
  scrollwheels
* Fix bugs as encountered