* Refine UI                                                     :version_1.0:
  The UI is a bit messy right now, especially the aspect/antiscia
  changer buttons and the display theme changer combo box on the chart
  view.

  For the display themes, a menu button with a popover may be the best
  option. That would need a nice icon, though (possibly with some
  planet and aspect symbols).

  The current view switcher (a menubutton) doesn’t show its accels
  (maybe because of the radio menu items?). Maybe it should be put
  back to a GtkStackSwitcher. The original place for that is now used
  up by the window title and the chart name, so a new place must be
  found for it.


* Issue an error message for missing resources

  If a gres:// link cannot be loaded by the XML loaders, Astrognome
  should issue an error message, stating that this is either a bug in
  the current chart theme (in 2.0+) or in Astrognome itself.

* [#C] Port to other Linux distros                              :version_1.0:

* Package for different distros [0/5]                           :version_1.0:
  - [ ] Fedora
  - [ ] Debian
  - [ ] Ubuntu
  - [ ] Arch
  - [ ] Gentoo

* Preview images                                                :version_1.0:

  The database (or more likely the cache directory) should contain a
  preview image of each chart. The chart list screen should show a
  small box with the name and the preview image. Upon mouseover the
  image should blur/darken and some chart data (maybe customizable?)
  may get drawn over it.

* Customizable accels                                           :version_2.0:

  Accels should be customizable, and they may also get some more sane
  defaults. Right now they are imitating Placidus, which, in turn, is
  not very intuitive.

  The accel customization may get its place on the Preferences dialog.

* Chart cleanup

* DONE Chart manipulation                                       :version_1.0:

* Synastries                                                    :version_2.0:

* Transits                                                      :version_2.0:

* Progressions                                                  :version_2.0:

* Stepping through time without actually modifying the chart data :version_1.0:

* Application settings                                          :version_2.0:
  - [-] Default display properties [1/10]
    - [X] Traditional view

     Personal (inner) planets, Ptolemaic aspects only, nothing else

    - [ ] Show/hide major aspects
    - [ ] Show/hide minor aspects
    - [ ] Show/hide astiscia/contrantiscia
    - [ ] Show/hide personal planets
    - [ ] Show/hide outer planets
    - [ ] Show/hide dwarf planets and asteroids
    - [ ] Show/hide fixed stars
    - [ ] Show/hide hidden ascendant
    - [ ] Show/hide vertex/anti-vertex

  - [ ] Different symbols for some planets [0/3]
    - [ ] Uranus
    - [ ] Pluto
    - [ ] Pholus

* Regiomontanus import                                          :version_2.0:

* Custom location database                                      :version_2.0:

* Chart export as different image types                         :version_1.0:

* Chart printing                                                :version_2.0:

* [#C] Port to Windows                                          :version_2.0:

* Future aspect table ideas

  The aspect table may be redesigned a bit. Currently it’s just a
  GtkGrid with images or characters.

** How about extending GtkGrid itself?

** Column/row highlighting

   If possible, the row and column where the mouse points to, should
   be highlighted. This, of course, should have a setting to disable
   this behaviour. Another option is to create divisor lines between
   the rows and columns.

** Aspect/antiscion changer

   The aspects table should utilise the same changer as the chart to
   show different relations between the planets.

** Apply display themes

   The aspect and antiscion table should use the same display theme as
   the chart. If a planet, aspect or antiscion axis is not in the
   display theme, it should not be visible on the table.

* Display themes

** Implement the original Astrognome theme

   The software created by Jean-André Santoni has its own list of
   planets, which is more than Classic, but obviously less than
   Everything.

** Arabic parts and fixed stars

   As soon as SWE-GLib supports them, of course

* Chart themes

  This can get hard. What if Astrognome 1.0 supports 10 planets, 2.0
  supports 15, and I use a chart theme for 1.0 in 2.0 (or vice verse)?
  In such cases a warning should be presented to the user.

  I may use fallback icons (yeah… how?), but they may look really ugly
  on the custom theme.

* Add the East point

  SWE-GLib doesn’t support it yet. It is the equatorial ascendant, and
  is calculated by Swiss Ephemeris, which presents it in ascmcs\[4\].

* Support for Julian calendar

  It may be usable for only in the backends, like when importing a
  Placidus file with Julian date. SWE-GLib doesn’t support it yet.

* Cloud export (and maybe import)

  GNOME Online Accounts supports some popular cloud services. It may
  be a good idea to implement saving, and possibly loading to/from
  there.

* Dynamic chart size

  Right some planets may disappear from the chart because they get too
  far from the chart ring (due to @dist).

  The maximum @dist value can be get with the following XPath
  expression:

  /chartinfo/bodies/body/@dist[not(. < ../../body/@dist)][1]