[ENH] Data Sets: Add filter

Orange/widgets/data/owdatasets.py

@@ -12,10 +12,9 @@
 from typing import Optional, Dict, Tuple
 
 from AnyQt.QtWidgets import (
-    QLabel, QTextBrowser, QSplitter, QTreeView,
+    QLabel, QLineEdit, QTextBrowser, QSplitter, QTreeView,
     QStyleOptionViewItem, QStyledItemDelegate, QApplication
 )
-
 from AnyQt.QtGui import QStandardItemModel, QStandardItem
 from AnyQt.QtCore import (
     Qt, QSize, QObject, QThread, QModelIndex, QSortFilterProxyModel,
@@ -26,12 +25,12 @@
 from serverfiles import LocalFiles, ServerFiles, sizeformat
 
 import Orange.data
-
 from Orange.misc.environ import data_dir
 from Orange.widgets import widget, settings, gui
 from Orange.widgets.utils.signals import Output
 from Orange.widgets.widget import Msg
 
+
 INDEX_URL = "http://datasets.orange.biolab.si/"
 log = logging.getLogger(__name__)
 
@@ -141,6 +140,12 @@ def __init__(self):
         self.infolabel = QLabel(text="Initializing...\n\n")
         box.layout().addWidget(self.infolabel)
 
+        gui.widgetLabel(self.mainArea, "Filter")
+        self.filterLineEdit = QLineEdit(
+            textChanged=self.filter
+        )
+        self.mainArea.layout().addWidget(self.filterLineEdit)
+
         self.splitter = QSplitter(orientation=Qt.Vertical)
 
         self.view = QTreeView(
@@ -150,6 +155,7 @@ def __init__(self):
             rootIsDecorated=False,
             editTriggers=QTreeView.NoEditTriggers,
         )
+
         box = gui.widgetBox(self.splitter, "Description", addToLayout=False)
         self.descriptionlabel = QLabel(
             wordWrap=True,
@@ -181,7 +187,9 @@ def __init__(self):
         model.setHorizontalHeaderLabels(HEADER)
         proxy = QSortFilterProxyModel()
         proxy.setSourceModel(model)
-        self.view.setModel(model)
+        proxy.setFilterKeyColumn(-1)
+        proxy.setFilterCaseSensitivity(False)
+        self.view.setModel(proxy)
 
         if self.splitter_state:
             self.splitter.restoreState(self.splitter_state)
@@ -294,8 +302,8 @@ def info(prefix, filename):
                 current_index = i
 
         hs = self.view.header().saveState()
-        model_ = self.view.model()
-        self.view.setModel(model)
+        model_ = self.view.model().sourceModel()
+        self.view.model().setSourceModel(model)
         self.view.header().restoreState(hs)
         model_.deleteLater()
         model_.setParent(None)
@@ -344,6 +352,12 @@ def selected_dataset(self):
             info = None
         return info
 
+    def filter(self):
+        filter_string = self.filterLineEdit.text().strip()
+        proxyModel = self.view.model()
+        if proxyModel:
+            proxyModel.setFilterFixedString(filter_string)
+
     def __on_selection(self):
         # Main data sets view selection has changed
         rows = self.view.selectionModel().selectedRows(0)

Orange/widgets/data/tests/test_owdatasets.py

@@ -9,7 +9,34 @@
 class TestOWDataSets(WidgetTest):
     @patch("Orange.widgets.data.owdatasets.list_remote",
            Mock(side_effect=requests.exceptions.ConnectionError))
+    @patch("Orange.widgets.data.owdatasets.list_local", Mock(return_value={}))
     @patch("Orange.widgets.data.owdatasets.log", Mock())
-    def test_works_without_internet_connection(self):
+    def test_no_internet_connection(self):
         w = self.create_widget(OWDataSets)  # type: OWDataSets
         self.assertTrue(w.Error.no_remote_datasets.is_shown())
+
+    @patch("Orange.widgets.data.owdatasets.list_remote",
+           Mock(side_effect=requests.exceptions.ConnectionError))
+    @patch("Orange.widgets.data.owdatasets.list_local",
+           Mock(return_value={('core', 'foo.tab'): {}}))
+    @patch("Orange.widgets.data.owdatasets.log", Mock())
+    def test_only_local(self):
+        w = self.create_widget(OWDataSets)  # type: OWDataSets
+        self.assertTrue(w.Warning.only_local_datasets.is_shown())
+        self.assertEqual(w.view.model().rowCount(), 1)
+
+    @patch("Orange.widgets.data.owdatasets.list_remote",
+           Mock(side_effect=requests.exceptions.ConnectionError))
+    @patch("Orange.widgets.data.owdatasets.list_local",
+           Mock(return_value={('core', 'foo.tab'): {},
+                              ('core', 'bar.tab'): {}}))
+    @patch("Orange.widgets.data.owdatasets.log", Mock())
+    def test_filtering(self):
+        w = self.create_widget(OWDataSets)  # type: OWDataSets
+        self.assertEqual(w.view.model().rowCount(), 2)
+        w.filterLineEdit.setText("foo")
+        self.assertEqual(w.view.model().rowCount(), 1)
+        w.filterLineEdit.setText("baz")
+        self.assertEqual(w.view.model().rowCount(), 0)
+        w.filterLineEdit.setText("")
+        self.assertEqual(w.view.model().rowCount(), 2)