[FIX] OWRank: Fix autocommit

Orange/widgets/data/owrank.py

@@ -212,7 +212,7 @@ def __init__(self):
         self.mainArea.layout().addWidget(view)
         view.setModel(model)
         view.setColumnWidth(0, 30)
-        view.selectionModel().selectionChanged.connect(self.commit)
+        view.selectionModel().selectionChanged.connect(self.on_select)
 
         def _set_select_manual():
             self.setSelectionMethod(OWRank.SelectManual)
@@ -331,7 +331,7 @@ def handleNewSignals(self):
         self.setStatusMessage('Running')
         self.updateScores()
         self.setStatusMessage('')
-        self.commit()
+        self.on_select()
 
     @Inputs.scorer
     def set_learner(self, scorer, id):
@@ -438,12 +438,18 @@ def updateScores(self):
         self.autoSelection()
         self.Outputs.scores.send(self.create_scores_table(labels))
 
+    def on_select(self):
+        # Save indices of attributes in the original, unsorted domain
+        self.selected_rows = self.ranksModel.mapToSourceRows([
+            i.row() for i in self.ranksView.selectionModel().selectedRows(0)])
+        self.commit()
+
     def setSelectionMethod(self, method):
         if self.selectionMethod != method:
             self.selectionMethod = method
             self.selectButtons.button(method).setChecked(True)
         self.autoSelection()
-        self.commit()
+        self.on_select()
 
     def autoSelection(self):
         selModel = self.ranksView.selectionModel()
@@ -500,10 +506,6 @@ def send_report(self):
             self.report_items("Output", self.out_domain_desc)
 
     def commit(self):
-        # Save indices of attributes in the original, unsorted domain
-        self.selected_rows = self.ranksModel.mapToSourceRows([
-            i.row() for i in self.ranksView.selectionModel().selectedRows(0)])
-
         selected_attrs = []
         if self.data is not None:
             attributes = self.data.domain.attributes
@@ -512,8 +514,7 @@ def commit(self):
                 self.selectButtons.button(self.selectionMethod).setChecked(True)
             selected_attrs = [attributes[i]
                               for i in self.selected_rows]
-
-        if self.data is None or not selected_attrs:
+        if not selected_attrs:
             self.Outputs.reduced_data.send(None)
             self.out_domain_desc = None
         else:

Orange/widgets/data/tests/test_owrank.py

@@ -9,7 +9,7 @@
 from Orange.widgets.data.owrank import OWRank, ProblemType, CLS_SCORES, REG_SCORES
 from Orange.widgets.tests.base import WidgetTest
 
-from AnyQt.QtCore import Qt
+from AnyQt.QtCore import Qt, QItemSelection
 from AnyQt.QtWidgets import QCheckBox
 
 
@@ -295,3 +295,33 @@ def test_setting_migration_fixes_header_state(self):
         w = self.create_widget(OWRank, stored_settings=settings)
 
         self.assertEqual(w.sorting, (0, Qt.AscendingOrder))
+
+    def test_auto_send(self):
+        widget = self.widget
+        model = widget.ranksModel
+        selectionModel = widget.ranksView.selectionModel()
+
+        # Auto-send disabled
+        widget.controls.auto_apply.setChecked(False)
+        self.send_signal(self.widget.Inputs.data, self.iris)
+        self.assertIsNone(self.get_output(widget.Outputs.reduced_data))
+
+        # Make selection, but auto-send disabled
+        selection = QItemSelection(model.index(1, 0),
+                                   model.index(1, model.columnCount() - 1))
+        selectionModel.select(selection, selectionModel.ClearAndSelect)
+        self.assertIsNone(self.get_output(widget.Outputs.reduced_data))
+
+        # Enable auto-send: should output data
+        widget.controls.auto_apply.setChecked(True)
+        reduced_data = self.get_output(widget.Outputs.reduced_data)
+        self.assertEqual(reduced_data.domain.attributes,
+                         (self.iris.domain["petal width"], ))
+
+        # Change selection: should change the output immediately
+        selection = QItemSelection(model.index(0, 0),
+                                   model.index(0, model.columnCount() - 1))
+        selectionModel.select(selection, selectionModel.ClearAndSelect)
+        reduced_data = self.get_output(widget.Outputs.reduced_data)
+        self.assertEqual(reduced_data.domain.attributes,
+                         (self.iris.domain["petal length"], ))