[ENH] ApplyDomain: data info displayed in the status bar

Orange/widgets/data/owtransform.py

@@ -1,10 +1,14 @@
 from typing import Optional
 
+from AnyQt.QtCore import Qt
+
 from Orange.data import Table, Domain
 from Orange.widgets import gui
 from Orange.widgets.report.report import describe_data
 from Orange.widgets.utils.sql import check_sql_input
 from Orange.widgets.utils.widgetpreview import WidgetPreview
+from Orange.widgets.utils.state_summary import format_multiple_summaries, \
+    format_summary_details
 from Orange.widgets.widget import OWWidget, Input, Output, Msg
 
 
@@ -31,6 +35,7 @@ class Error(OWWidget.Error):
     def __init__(self):
         super().__init__()
         self.data = None  # type: Optional[Table]
+        self.template_data = None  # type: Optional[Table]
         self.template_domain = None  # type: Optional[Domain]
         self.transformed_info = describe_data(None)  # type: OrderedDict
 
@@ -41,6 +46,9 @@ def __init__(self):
         self.set_input_label_text()
         self.set_template_label_text()
 
+        self.info.set_input_summary(self.info.NoInput)
+        self.info.set_output_summary(self.info.NoOutput)
+
     def set_input_label_text(self):
         text = "No data on input."
         if self.data:
@@ -75,8 +83,21 @@ def set_data(self, data):
     @check_sql_input
     def set_template_data(self, data):
         self.template_domain = data and data.domain
+        self.template_data = data
 
     def handleNewSignals(self):
+        summary, details, kwargs = self.info.NoInput, "", {}
+        if self.data or self.template_data:
+            n_data = len(self.data) if self.data else 0
+            n_template = len(self.template_data) if self.template_data else 0
+            summary = f"{self.info.format_number(n_data)}, " \
+                      f"{self.info.format_number(n_template)}"
+            kwargs = {"format": Qt.RichText}
+            details = format_multiple_summaries([
+                ("Data", self.data),
+                ("Template data", self.template_data)
+            ])
+        self.info.set_input_summary(summary, details, **kwargs)
         self.apply()
 
     def apply(self):
@@ -89,6 +110,9 @@ def apply(self):
                 self.Error.error(ex)
 
         data = transformed_data
+        summary = len(data) if data else self.info.NoOutput
+        details = format_summary_details(data) if data else ""
+        self.info.set_output_summary(summary, details)
         self.transformed_info = describe_data(data)
         self.Outputs.transformed_data.send(data)
         self.set_template_label_text()

Orange/widgets/data/tests/test_owtransform.py

@@ -1,5 +1,5 @@
 # Test methods with long descriptive names can omit docstrings
-# pylint: disable=missing-docstring
+# pylint: disable=missing-docstring, protected-access
 from unittest.mock import Mock
 
 from numpy import testing as npt
@@ -9,6 +9,8 @@
 from Orange.widgets.data.owtransform import OWTransform
 from Orange.widgets.tests.base import WidgetTest
 from Orange.widgets.unsupervised.owpca import OWPCA
+from Orange.widgets.utils.state_summary import format_summary_details, \
+    format_multiple_summaries
 
 
 class TestOWTransform(WidgetTest):
@@ -19,6 +21,8 @@ def setUp(self):
 
     def test_output(self):
         # send data and template data
+        info = self.widget.info
+        no_input, no_output = "No data on input", "No data on output"
         self.send_signal(self.widget.Inputs.data, self.data[::15])
         self.send_signal(self.widget.Inputs.template_data, self.disc_data)
         output = self.get_output(self.widget.Outputs.transformed_data)
@@ -29,6 +33,14 @@ def test_output(self):
                          self.widget.template_label.text())
         self.assertEqual("Output data includes 4 features.",
                          self.widget.output_label.text())
+        data_list = [("Data", self.data[::15]), ("Template data", self.disc_data)]
+        summary, details = "10, 150", format_multiple_summaries(data_list)
+        self.assertEqual(info._StateInfo__input_summary.brief, summary)
+        self.assertEqual(info._StateInfo__input_summary.details, details)
+        summary, details = "10", format_summary_details(output)
+        self.assertEqual(info._StateInfo__output_summary.brief, summary)
+        self.assertEqual(info._StateInfo__output_summary.details, details)
+
 
         # remove template data
         self.send_signal(self.widget.Inputs.template_data, None)
@@ -39,6 +51,12 @@ def test_output(self):
         self.assertEqual("No template data on input.",
                          self.widget.template_label.text())
         self.assertEqual("", self.widget.output_label.text())
+        data_list = [("Data", self.data[::15]), ("Template data", None)]
+        summary, details = "10, 0", format_multiple_summaries(data_list)
+        self.assertEqual(info._StateInfo__input_summary.brief, summary)
+        self.assertEqual(info._StateInfo__input_summary.details, details)
+        self.assertEqual(info._StateInfo__output_summary.brief, "")
+        self.assertEqual(info._StateInfo__output_summary.details, no_output)
 
         # send template data
         self.send_signal(self.widget.Inputs.template_data, self.disc_data)
@@ -59,13 +77,23 @@ def test_output(self):
         self.assertEqual("Template data includes 4 features.",
                          self.widget.template_label.text())
         self.assertEqual("", self.widget.output_label.text())
+        data_list = [("Data", None), ("Template data", self.disc_data)]
+        summary, details = "0, 150", format_multiple_summaries(data_list)
+        self.assertEqual(info._StateInfo__input_summary.brief, summary)
+        self.assertEqual(info._StateInfo__input_summary.details, details)
+        self.assertEqual(info._StateInfo__output_summary.brief, "")
+        self.assertEqual(info._StateInfo__output_summary.details, no_output)
 
         # remove template data
         self.send_signal(self.widget.Inputs.template_data, None)
         self.assertEqual("No data on input.", self.widget.input_label.text())
         self.assertEqual("No template data on input.",
                          self.widget.template_label.text())
         self.assertEqual("", self.widget.output_label.text())
+        self.assertEqual(info._StateInfo__input_summary.brief, "")
+        self.assertEqual(info._StateInfo__input_summary.details, no_input)
+        self.assertEqual(info._StateInfo__output_summary.brief, "")
+        self.assertEqual(info._StateInfo__output_summary.details, no_output)
 
     def assertTableEqual(self, table1, table2):
         self.assertIs(table1.domain, table2.domain)