Allow user to set default calendar in date editor

Fixes #11809

gramps/gen/config.py

@@ -240,6 +240,7 @@ register('paths.quick-backup-filename',
 register('preferences.quick-backup-include-mode', False)
 register('preferences.date-format', 0)
 register('preferences.calendar-format-report', 0)
+register('preferences.calendar-format-input', 0)
 register('preferences.cprefix', 'C%04d')
 register('preferences.default-source', False)
 register('preferences.tag-on-import', False)

gramps/gui/configure.py

@@ -1311,6 +1311,19 @@ class GrampsPreferences(ConfigureDialog):
         grid.attach(lwidget, 1, row, 1, 1)
         grid.attach(obox, 2, row, 2, 1)
 
+        row += 1
+        # Calendar format on input:
+        obox = Gtk.ComboBoxText()
+        list(map(obox.append_text, Date.ui_calendar_names))
+        active = config.get('preferences.calendar-format-input')
+        if active >= len(formats):
+            active = 0
+        obox.set_active(active)
+        obox.connect('changed', self.date_calendar_for_input_changed)
+        lwidget = BasicLabel(_("%s: ") % _('Calendar on input'))
+        grid.attach(lwidget, 1, row, 1, 1)
+        grid.attach(obox, 2, row, 2, 1)
+
         row += 1
         # Status bar:
         obox = Gtk.ComboBoxText()

gramps/gui/editors/editdate.py

@@ -60,6 +60,7 @@ from gi.repository import Gtk
 #-------------------------------------------------------------------------
 from gramps.gen.const import GRAMPS_LOCALE as glocale
 _ = glocale.translation.sgettext
+from gramps.gen.config import config
 from gramps.gen.lib.date import Date, DateError, calendar_has_fixed_newyear
 from gramps.gen.datehandler import displayer
 from gramps.gen.const import URL_MANUAL_SECT1
@@ -199,6 +200,9 @@ class EditDate(ManagedWindow):
             self.calendar_box.set_active(Date.CAL_JULIAN)
         self.dual_dated.connect('toggled', self.switch_dual_dated)
 
+        cal = config.get('preferences.calendar-format-input')
+        self.calendar_box.set_active(cal)
+
         # The dialog is modal -- since dates don't have names, we don't
         # want to have several open dialogs, since then the user will
         # loose track of which is which. Much like opening files.