GeoCoding: Don't override identifier type in set_data

orangecontrib/geo/widgets/owgeocoding.py

@@ -64,7 +64,7 @@ class Outputs:
     autocommit = settings.Setting(True)
     is_decoding = settings.ContextSetting(0)
     str_attr = settings.ContextSetting(None)
-    str_type = settings.ContextSetting(next(iter(ID_TYPE)))
+    str_type = settings.ContextSetting(None)
     lat_attr = settings.ContextSetting(None)
     lon_attr = settings.ContextSetting(None)
     admin = settings.ContextSetting(0)
@@ -106,13 +106,14 @@ def _radioChanged():
         model = DomainModel(parent=self, valid_types=(StringVariable, DiscreteVariable))
         self.domainmodels.append(model)
 
-        combo = gui.comboBox(
+        gui.comboBox(
             box, self, 'str_attr', label='Region identifier:',
-            orientation=Qt.Horizontal, callback=self.region_attr_changed,
+            orientation=Qt.Horizontal, callback=self.on_region_attr_changed,
             sendSelectedValue=True, model=model)
-        gui.comboBox(
-            box, self, 'str_type', label='Identifier type:', orientation=Qt.Horizontal,
-            items=tuple(self.ID_TYPE.keys()), callback=lambda: self.commit(), sendSelectedValue=True)
+        self.str_type_combo = gui.comboBox(
+            box, self, None, label='Identifier type:', orientation=Qt.Horizontal,
+            items=tuple(self.ID_TYPE))
+        self.str_type_combo.textActivated.connect(self.on_region_type_changed)
 
         # Select first mode if any of its combos are changed
         for combo in box.findChildren(QComboBox):
@@ -203,7 +204,15 @@ def save_and_commit():
         box.layout().addWidget(view)
         self.setMainAreaVisibility(False)
 
-    def region_attr_changed(self):
+    def on_region_attr_changed(self):
+        self.guess_region_type()
+        self.commit()
+
+    def on_region_type_changed(self, value):
+        self.str_type = value
+        self.commit()
+
+    def guess_region_type(self):
         if self.data is None:
             return
         if self.str_attr:
@@ -213,8 +222,8 @@ def region_attr_changed(self):
             str_type = next((k for k, v in self.ID_TYPE.items() if v == func), None)
             if str_type is not None and str_type != self.str_type:
                 self.str_type = str_type
+                self.str_type_combo.setCurrentText(self.str_type)
 
-        self.commit()
 
     def commit(self):
         output = None
@@ -330,8 +339,15 @@ def set_data(self, data):
 
         self.lat_attr, self.lon_attr = find_lat_lon(data)
 
+        self.str_type = None
         self.openContext(data)
-        self.region_attr_changed()
+        if self.str_type is None:
+            self.guess_region_type()
+        if self.str_type is None:
+            self.str_type = next(iter(self.ID_TYPE))
+        self.str_type_combo.setCurrentText(self.str_type)
+
+        self.commit()
 
     def clear(self):
         self.data = None

orangecontrib/geo/widgets/tests/test_owgeocoding.py

@@ -1,7 +1,7 @@
 # pylint: disable=protected-access
 import unittest
 
-from Orange.data import Table, Domain, DiscreteVariable
+from Orange.data import Table, Domain, DiscreteVariable, StringVariable
 from Orange.widgets.tests.base import WidgetTest
 from orangecontrib.geo.widgets.owgeocoding import OWGeocoding
 from orangecontrib.geo.mapper import ToLatLon, CC_NAME_TO_CC_NAME
@@ -73,6 +73,59 @@ def test_all_continuous(self):
         self.send_signal(self.widget.Inputs.data, housing)
         self.assertEqual(self.widget.is_decoding, 1)
 
+    def test_geo_region_guess(self):
+        countries = Table.from_list(
+            Domain([], [], [StringVariable("s")]),
+            [["Slovenia"], ["Germany"], ["France"], ["Italy"], ["Spain"]]
+        )
+        cities = Table.from_list(
+            Domain([], [], [StringVariable("t")]),
+            [["Ljubljana"], ["Berlin"], ["Paris"], ["Rome"], ["Madrid"]]
+        )
+        jibberish = Table.from_list(
+            Domain([], [], [StringVariable("u")]),
+            [["asdfas"], ["Adsfas"], ["agehra"]]
+        )
+        jibberish_t = Table.from_list(
+            Domain([], [], [StringVariable("t")]),
+            [["asdfas"], ["Adsfas"], ["agehra"]]
+        )
+        cities_u = Table.from_list(
+            Domain([], [], [StringVariable("u")]),
+            [["Ljubljana"], ["Berlin"], ["Paris"], ["Rome"], ["Madrid"]]
+        )
+
+        # check if the widget guesses the correct geo region
+        self.send_signal(self.widget.Inputs.data, countries)
+        self.assertEqual(self.widget.str_type, "Country name")
+        self.assertEqual(self.widget.str_type_combo.currentText(), "Country name")
+        m = self.get_output(self.widget.Outputs.coded_data).metas
+        self.assertAlmostEqual(m[0][1], 46.150207418500074)
+        self.assertAlmostEqual(m[4][2], -3.4893281046335867)
+
+        # check if the widget guesses the correct geo region
+        self.send_signal(self.widget.Inputs.data, cities)
+        self.assertEqual(self.widget.str_type, "Major city (Europe)")
+        self.assertEqual(self.widget.str_type_combo.currentText(), "Major city (Europe)")
+        m = self.get_output(self.widget.Outputs.coded_data).metas
+        self.assertAlmostEqual(m[0][1], 46.150207418500074)
+        self.assertAlmostEqual(m[4][2], -3.4893281046335867)
+
+        # cannot guess: use default, country name
+        self.send_signal(self.widget.Inputs.data, jibberish)
+        self.assertEqual(self.widget.str_type, "Country name")
+        self.assertEqual(self.widget.str_type_combo.currentText(), "Country name")
+
+        # cannot guess, but can use context
+        self.send_signal(self.widget.Inputs.data, jibberish_t)
+        self.assertEqual(self.widget.str_type, "Major city (Europe)")
+        self.assertEqual(self.widget.str_type_combo.currentText(), "Major city (Europe)")
+
+        # could guess, but context takes precedence
+        self.send_signal(self.widget.Inputs.data, cities_u)
+        self.assertEqual(self.widget.str_type, "Country name")
+        self.assertEqual(self.widget.str_type_combo.currentText(), "Country name")
+
     def test_minimum_size(self):
         pass