[ENH] OWDatasets: Data info displayed in the status bar

Orange/widgets/data/owdatasets.py

@@ -28,6 +28,7 @@
 from Orange.widgets import settings, gui
 from Orange.widgets.utils.signals import Output
 from Orange.widgets.utils.widgetpreview import WidgetPreview
+from Orange.widgets.utils.state_summary import format_summary_details
 from Orange.widgets.widget import OWWidget, Msg
 
 
@@ -232,6 +233,8 @@ def __init__(self):
         self.splitter.addWidget(self.view)
         self.splitter.addWidget(box)
 
+        self.info.set_output_summary(self.info.NoOutput)
+
         self.splitter.setSizes([300, 200])
         self.splitter.splitterMoved.connect(
             lambda:
@@ -535,9 +538,12 @@ def closeEvent(self, event):
     def load_and_output(self, path):
         if path is None:
             self.Outputs.data.send(None)
+            self.info.set_output_summary(self.info.NoOutput)
         else:
             data = self.load_data(path)
             self.Outputs.data.send(data)
+            self.info.set_output_summary(len(data),
+                                         format_summary_details(data))
 
         self.current_output = path
         self.__update_cached_state()

Orange/widgets/data/tests/test_owdatasets.py

@@ -7,6 +7,7 @@
 
 from Orange.widgets.data.owdatasets import OWDataSets
 from Orange.widgets.tests.base import WidgetTest
+from Orange.widgets.utils.state_summary import format_summary_details
 
 
 class TestOWDataSets(WidgetTest):
@@ -75,6 +76,24 @@ def test_dir_depth(self):
         self.wait_until_stop_blocking(w)
         self.assertEqual(w.view.model().rowCount(), 2)
 
+    @patch("Orange.widgets.data.owdatasets.OWDataSets.list_remote",
+           Mock(return_value={('core', 'iris.tab'): {}}))
+    @patch("Orange.widgets.data.owdatasets.OWDataSets.list_local",
+           Mock(return_value={}))
+    @patch("Orange.widgets.data.owdatasets.ensure_local",
+           Mock(return_value="iris.tab"))
+    def test_summary(self):
+        """Check if status bar is updated when data is received"""
+        widget = self.create_widget(OWDataSets)
+        output_sum = widget.info.set_output_summary = Mock()
+        self.wait_until_stop_blocking(widget)
+        # select the only dataset
+        sel_type = QItemSelectionModel.ClearAndSelect | QItemSelectionModel.Rows
+        widget.view.selectionModel().select(widget.view.model().index(0, 0), sel_type)
+        widget.commit()
+        output = self.get_output(widget.Outputs.data, widget)
+        output_sum.assert_called_with(len(output),
+                                      format_summary_details(output))
 
 if __name__ == "__main__":
     unittest.main()