[ENH] Open draged files on CSV Import, Load Model and Distance File widgets

Orange/widgets/data/owcsvimport.py

@@ -4,6 +4,7 @@
 ----------------------
 
 """
+from __future__ import annotations
 import sys
 import types
 import os
@@ -32,7 +33,8 @@
 )
 
 from AnyQt.QtCore import (
-    Qt, QFileInfo, QTimer, QSettings, QObject, QSize, QMimeDatabase, QMimeType
+    Qt, QFileInfo, QTimer, QSettings, QObject, QSize, QMimeDatabase, QMimeType,
+    QUrl
 )
 from AnyQt.QtGui import (
     QStandardItem, QStandardItemModel, QPalette, QColor, QIcon
@@ -50,12 +52,15 @@
 from pandas import CategoricalDtype
 from pandas.api import types as pdtypes
 
+from orangecanvas.utils import assocf
+from orangecanvas.utils.qobjref import qobjref_weak
 from orangewidget.utils import enum_as_int
 
 import Orange.data
 from Orange.misc.collections import natural_sorted
 
 from Orange.widgets import widget, gui, settings
+from Orange.widgets.utils.filedialogs import OWUrlDropBase
 from Orange.widgets.utils.localization import pl
 from Orange.widgets.utils.concurrent import PyOwned
 from Orange.widgets.utils import (
@@ -610,7 +615,7 @@
     return Options(dialect=dialect, encoding=encoding, rowspec=rowspec)
 
 
-class OWCSVFileImport(widget.OWWidget):
+class OWCSVFileImport(OWUrlDropBase):
     name = "CSV File Import"
     description = "Import a data table from a CSV formatted file."
     icon = "icons/CSVFile.svg"
@@ -967,6 +972,24 @@
         """Activate the Import Options dialog for the  current item."""
         item = self.current_item()
         assert item is not None
+        path = item.path()
+        options = item.options()
+
+        def onfinished(dlg: CSVImportDialog):
+            if dlg.result() != QDialog.Accepted:
+                return
+            newoptions = dlg.options()
+            item.setData(newoptions, ImportItem.OptionsRole)
+            # update local recent paths list
+            self._note_recent(path, newoptions)
+            if newoptions != options:
+                self._invalidate()
+
+        self._activate_import_dialog_for_item(item, finished=onfinished)
+
+    def _activate_import_dialog_for_item(
+            self, item: ImportItem, finished: Callable[[CSVImportDialog], None]
+    ):
         dlg = CSVImportDialog(
             self, windowTitle="Import Options", sizeGripEnabled=True,
         )
@@ -984,18 +1007,14 @@
         if isinstance(options, Options):
             dlg.setOptions(options)
 
-        def update():
-            newoptions = dlg.options()
-            item.setData(newoptions, ImportItem.OptionsRole)
-            # update local recent paths list
-            self._note_recent(path, newoptions)
-            if newoptions != options:
-                self._invalidate()
-        dlg.accepted.connect(update)
+        dialog_ref = qobjref_weak(dlg)
 
-        def store_size():
+        def onfinished():
+            dlg = dialog_ref()
             settings.setValue("size", dlg.size())
-        dlg.finished.connect(store_size)
+            finished(dlg)
+
+        dlg.finished.connect(onfinished)
         dlg.show()
 
     def set_selected_file(self, filename, options=None):
@@ -1035,7 +1054,6 @@
         else:
             item = ImportItem.fromPath(filename)
 
-        # item.setData(VarPath(filename), ImportItem.VarPathRole)
         item.setData(True, ImportItem.IsSessionItemRole)
         model.insertRow(0, item)
 
@@ -1127,6 +1145,7 @@
         """
         Cancel current pending or executing task.
         """
+        self.__committimer.stop()
         if self.__watcher is not None:
             self.__cancel_task()
             self.__clear_running_state()
@@ -1311,6 +1330,37 @@
             idx = -1
         self.recent_combo.setCurrentIndex(idx)
 
+    def canDropUrl(self, url: QUrl) -> bool:
+        if url.isLocalFile():
+            return _mime_type_for_path(url.toLocalFile()).inherits("text/plain")
+        else:
+            return False
+
+    def handleDroppedUrl(self, url: QUrl) -> None:
+        # search recent items for path
+        path = url.toLocalFile()
+        hist = self.itemsFromSettings()
+        res = assocf(hist, lambda p: samepath(p, path))
+        if res is not None:
+            _, options = res
+        else:
+            mt = _mime_type_for_path(path)
+            options = default_options_for_mime_type(path, mt.name())
+        self.activate_import_for_file(path, options)
+
+    def activate_import_for_file(self, path: str, options: Options | None = None):
+        self.cancel()  # Cancel current task if any
+        item = ImportItem()  # dummy temp item
+        item.setPath(path)
+        item.setOptions(options)
+
+        def finished(dlg: CSVImportDialog):
+            if dlg.result() != QDialog.Accepted:
+                return
+            self.set_selected_file(path, dlg.options())
+
+        self._activate_import_dialog_for_item(item, finished)
+
     @classmethod
     def migrate_settings(cls, settings, version):
         if not version or version < 2:

Orange/widgets/data/owfile.py

@@ -26,6 +26,7 @@
 from Orange.widgets.utils.itemmodels import PyListModel
 from Orange.widgets.utils.filedialogs import RecentPathsWComboMixin, \
     open_filename_dialog, stored_recent_paths_prepend
+from Orange.widgets.utils.filedialogs import OWUrlDropBase
 from Orange.widgets.utils.widgetpreview import WidgetPreview
 from Orange.widgets.widget import Output, Msg
 from Orange.widgets.utils.combobox import TextEditCombo
@@ -82,7 +83,7 @@ def focusInEvent(self, event):
         QTimer.singleShot(0, self.selectAll)
 
 
-class OWFile(widget.OWWidget, RecentPathsWComboMixin):
+class OWFile(OWUrlDropBase, RecentPathsWComboMixin):
     name = "File"
     id = "orange.widgets.data.file"
     description = "Read data from an input file or network " \
@@ -311,8 +312,7 @@ def package(w):
 
         QTimer.singleShot(0, self.load_data)
 
-    @staticmethod
-    def sizeHint():
+    def sizeHint(self):
         return QSize(600, 550)
 
     def select_file(self, n):
@@ -632,24 +632,18 @@ def get_ext_name(filename):
 
         self.report_data("Data", self.data)
 
-    @staticmethod
-    def dragEnterEvent(event):
-        """Accept drops of valid file urls"""
-        urls = event.mimeData().urls()
-        if urls:
-            try:
-                FileFormat.get_reader(urls[0].toLocalFile())
-                event.acceptProposedAction()
-            except MissingReaderException:
-                pass
-
-    def dropEvent(self, event):
-        """Handle file drops"""
-        urls = event.mimeData().urls()
-        if urls:
-            self.add_path(urls[0].toLocalFile())  # add first file
+    def canDropUrl(self, url: QUrl) -> bool:
+        return OWFileDropHandler().canDropUrl(url)
+
+    def handleDroppedUrl(self, url: QUrl) -> None:
+        if url.isLocalFile():
+            self.add_path(url.toLocalFile())  # add first file
             self.source = self.LOCAL_FILE
             self.load_data()
+        else:
+            self.url_combo.insertItem(0, url.toString())
+            self.url_combo.setCurrentIndex(0)
+            self._url_set()
 
     def workflowEnvChanged(self, key, value, oldvalue):
         """

Orange/widgets/data/tests/test_owcsvimport.py

@@ -1,4 +1,4 @@
-# pylint: disable=no-self-use,protected-access,invalid-name,arguments-differ
+# pylint: disable=protected-access,invalid-name,arguments-differ
 import tempfile
 import unittest
 from unittest import mock
@@ -14,7 +14,7 @@
 import pandas as pd
 from numpy.testing import assert_array_equal
 
-from AnyQt.QtCore import QSettings, Qt
+from AnyQt.QtCore import QSettings, Qt, QUrl
 from AnyQt.QtGui import QIcon
 from AnyQt.QtWidgets import QFileDialog
 from AnyQt.QtTest import QSignalSpy
@@ -28,7 +28,7 @@
 from Orange.widgets.tests.base import WidgetTest, GuiTest
 from Orange.widgets.data import owcsvimport
 from Orange.widgets.data.owcsvimport import (
-    OWCSVFileImport, pandas_to_table, ColumnType, RowSpec,
+    OWCSVFileImport, pandas_to_table, ColumnType, RowSpec, ImportItem,
 )
 from Orange.widgets.utils.pathutils import PathItem, samepath
 from Orange.widgets.utils.settings import QSettings_writeArray
@@ -374,6 +374,41 @@ def test_browse_for_missing_prefixed_parent(self):
             self.assertEqual(item[0], cur.varPath())
             self.assertEqual(item[1].as_dict(), cur.options().as_dict())
 
+    def test_activate_import_dialog(self):
+        path = self.data_regions_path
+        item = ImportItem.fromPath(path)
+        self.widget.import_items_model.appendRow(ImportItem.fromPath(path))
+        opts = item.options()
+        self.assertIsNone(opts)
+        with mock.patch.object(owcsvimport.CSVImportDialog, "show"):
+            self.widget.import_options_button.click()
+            dlg = self.widget.findChild(owcsvimport.CSVImportDialog)
+            dlg.accept()
+        item_ = self.widget.current_item()
+        self.assertEqual(item.path(), item_.path())
+        self.assertIsNotNone(item_.options())
+
+    def test_drop_file(self):
+        self.assertFalse(self.widget.canDropUrl(QUrl("https://aa-bb.com")))
+        url = QUrl.fromLocalFile(self.data_regions_path)
+        self.assertTrue(self.widget.canDropUrl(url))
+
+        with mock.patch.object(owcsvimport.CSVImportDialog, "show"):
+            self.widget.handleDroppedUrl(url)
+            dlg = self.widget.findChild(owcsvimport.CSVImportDialog)
+            dlg.reject()
+        item = self.widget.current_item()
+        self.assertIsNone(item, "Rejecting the dialog should not record the recent file")
+
+        with mock.patch.object(owcsvimport.CSVImportDialog, "show"):
+            self.widget.handleDroppedUrl(url)
+            dlg = self.widget.findChild(owcsvimport.CSVImportDialog)
+            dlg.accept()
+        item = self.widget.current_item()
+        self.assertEqual(item.path(), url.toLocalFile())
+        out = self.get_output(self.widget.Outputs.data)
+        self.assertEqual(len(out.domain), 3)
+
     def test_long_data(self):
         with tempfile.TemporaryDirectory() as tmp:
             path = os.path.join(tmp, "test.csv")

Orange/widgets/data/tests/test_owfile.py

@@ -71,11 +71,13 @@ class TestOWFile(WidgetTest):
     event_data = None
 
     def setUp(self):
+        super().setUp()
         self.widget = self.create_widget(OWFile)  # type: OWFile
         dataset_dirs.append(dirname(__file__))
 
     def tearDown(self):
         dataset_dirs.pop()
+        super().tearDown()
 
     def test_describe_call_get_nans(self):
         table = Table("iris")
@@ -93,11 +95,6 @@ def test_dragEnterEvent_accepts_urls(self):
         self.widget.dragEnterEvent(event)
         self.assertTrue(event.isAccepted())
 
-    def test_dragEnterEvent_skips_osx_file_references(self):
-        event = self._drag_enter_event(QUrl.fromLocalFile('/.file/id=12345'))
-        self.widget.dragEnterEvent(event)
-        self.assertFalse(event.isAccepted())
-
     def test_dragEnterEvent_skips_usupported_files(self):
         event = self._drag_enter_event(QUrl.fromLocalFile('file.unsupported'))
         self.widget.dragEnterEvent(event)
@@ -122,6 +119,12 @@ def test_dropEvent_selects_file(self):
         self.assertTrue(path.samefile(self.widget.last_path(), TITANIC_PATH))
         self.widget.load_data.assert_called_with()
 
+        event = self._drop_event(QUrl("https://example.com/aa.csv"))
+        self.widget.load_data.reset_mock()
+        self.widget.dropEvent(event)
+        self.assertEqual(self.widget.source, OWFile.URL)
+        self.widget.load_data.assert_called_with()
+
     def _drop_event(self, url):
         # make sure data does not get garbage collected before it used
         self.event_data = data = QMimeData()

Orange/widgets/model/owloadmodel.py

@@ -3,21 +3,21 @@
 from typing import Any, Dict
 
 from AnyQt.QtWidgets import QSizePolicy, QStyle, QFileDialog
-from AnyQt.QtCore import QTimer
+from AnyQt.QtCore import QTimer, QUrl
 
 from orangewidget.workflow.drophandler import SingleFileDropHandler
 
 from Orange.base import Model
 from Orange.widgets import widget, gui
 from Orange.widgets.model import owsavemodel
 from Orange.widgets.utils.filedialogs import RecentPathsWComboMixin, RecentPath, \
-    stored_recent_paths_prepend
+    stored_recent_paths_prepend, OWUrlDropBase
 from Orange.widgets.utils import stdpaths
 from Orange.widgets.utils.widgetpreview import WidgetPreview
 from Orange.widgets.widget import Msg, Output
 
 
-class OWLoadModel(widget.OWWidget, RecentPathsWComboMixin):
+class OWLoadModel(OWUrlDropBase, RecentPathsWComboMixin):
     name = "Load Model"
     description = "Load a model from an input file."
     priority = 3050
@@ -91,6 +91,17 @@ def open_file(self):
         else:
             self.Outputs.model.send(model)
 
+    def canDropUrl(self, url: QUrl) -> bool:
+        if url.isLocalFile():
+            return OWLoadModelDropHandler().canDropFile(url.toLocalFile())
+        else:
+            return False
+
+    def handleDroppedUrl(self, url: QUrl) -> None:
+        if url.isLocalFile():
+            self.add_path(url.toLocalFile())
+            self.open_file()
+
 
 class OWLoadModelDropHandler(SingleFileDropHandler):
     WIDGET = OWLoadModel