Merge tag '3.32.0' into stable

.github/workflows/test.yml

@@ -45,6 +45,10 @@ jobs:
             python-version: 3.8
             tox_env: orange-latest
             name: Latest
+          - os: ubuntu-18.04
+            python-version: 3.7
+            tox_env: orange-oldest
+            name: Oldest dependencies
 
     services:
       postgres:
@@ -101,12 +105,12 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        os: [macos-10.15, windows-2016]
+        os: [macos-10.15, windows-2019]
         python-version: [3.7, 3.8, 3.9]
         tox_env: [orange-released]
         name: [Released]
         include:
-          - os: windows-2016
+          - os: windows-latest
             python-version: 3.8
             tox_env: orange-latest
             name: Latest

CHANGELOG.md

@@ -5,6 +5,45 @@ Change Log
 ------------
 
 
+[3.32.0] - 2022-04-01
+--------------------
+##### Enhancements
+* Enable multitarget problem types for OWTestAndScore and OWPredictions ([#5848](../../pull/5848))
+* Datetime format selection ([#5819](../../pull/5819))
+* Predictions: Allow choosing a target ([#5790](../../pull/5790))
+* Server embedder: use queue, handle unsuccessful requests at the end ([#5835](../../pull/5835))
+* orange-canvas: Add cmd parameter to clear all settings/caches ([#5844](../../pull/5844))
+* New icons and splash screen ([#5814](../../pull/5814))
+* Use palette colors in more places ([#5680](../../pull/5680))
+* File: explicit file format choice ([#5736](../../pull/5736))
+* Learner widgets: Inform about potential problems when overriding preprocessors ([#5710](../../pull/5710))
+
+##### Bugfixes
+* Orange.data.Table: deprecated is_view and is_copy ([#5913](../../pull/5913))
+* owrocanalysis: Fix an index error in custom tick calculation ([#5904](../../pull/5904))
+* SOM: Fix crash when color is constant ([#5860](../../pull/5860))
+* plotutils: Fix implicit conversion to int warning error ([#5874](../../pull/5874))
+* Calibration: Fix crash on empty folds ([#5859](../../pull/5859))
+* Scatter Plot: Replot when input features change ([#5837](../../pull/5837))
+* Nomogram: Purge class_var values ([#5847](../../pull/5847))
+* Scatter plot: Fix rotation of regression line label ([#5840](../../pull/5840))
+* widgets.evaluate.utils: call resizeColumnsToContents before setting hidden header sections. ([#5851](../../pull/5851))
+* tSNE, Freeviz: Set effective_data ([#5839](../../pull/5839))
+* Linear Projection: Fix LDA ([#5828](../../pull/5828))
+* Decorate overridden input data handler ([#5836](../../pull/5836))
+* Table: from_file/from_url remove type conversion ([#5812](../../pull/5812))
+* Group by: Restore aggregations if removed due to open context ([#5823](../../pull/5823))
+* Ensure unlockable sparse arrays after Table.copy ([#5807](../../pull/5807))
+* ExcelReader: Write roles ([#5810](../../pull/5810))
+* owfeatureconstructor: Always update models on data change ([#5804](../../pull/5804))
+* File: remove some resizing limits ([#5815](../../pull/5815))
+* owfeaturestatistics: Fix implicit int conversion error on resize ([#5799](../../pull/5799))
+* table_from_frame: replace nan with String.Unknown for string variable ([#5795](../../pull/5795))
+* Update (and test) minimum dependencies ([#5781](../../pull/5781))
+* test_owdistancematrix: Do not download data for testing ([#5773](../../pull/5773))
+* Silhouette plot text width ([#5756](../../pull/5756))
+
+
 [3.31.1] - 2022-01-07
 --------------------
 ##### Bugfixes
@@ -1639,7 +1678,8 @@ Change Log
 * Initial version based on Python 1.5.2 and Qt 2.3
 
 
-[next]: https://github.com/biolab/orange3/compare/3.31.1...HEAD
+[next]: https://github.com/biolab/orange3/compare/3.32.0...HEAD
+[3.32.0]: https://github.com/biolab/orange3/compare/3.31.1...3.32.0
 [3.31.1]: https://github.com/biolab/orange3/compare/3.31.0...3.31.1
 [3.31.0]: https://github.com/biolab/orange3/compare/3.30.2...3.31.0
 [3.30.2]: https://github.com/biolab/orange3/compare/3.30.1...3.30.2

Orange/base.py

@@ -3,12 +3,12 @@
 from collections.abc import Iterable
 import re
 import warnings
-from typing import Callable, Dict
+from typing import Callable, Dict, Optional
 
 import numpy as np
 import scipy
 
-from Orange.data import Table, Storage, Instance, Value
+from Orange.data import Table, Storage, Instance, Value, Domain
 from Orange.data.filter import HasClass
 from Orange.data.table import DomainTransformationError
 from Orange.data.util import one_hot
@@ -86,6 +86,9 @@ class Learner(ReprableWithPreprocessors):
     #: A sequence of data preprocessors to apply on data prior to
     #: fitting the model
     preprocessors = ()
+
+    # Note: Do not use this class attribute.
+    #       It remains here for compatibility reasons.
     learner_adequacy_err_msg = ''
 
     def __init__(self, preprocessors=None):
@@ -95,6 +98,7 @@ def __init__(self, preprocessors=None):
         elif preprocessors:
             self.preprocessors = (preprocessors,)
 
+    # pylint: disable=R0201
     def fit(self, X, Y, W=None):
         raise RuntimeError(
             "Descendants of Learner must overload method fit or fit_storage")
@@ -106,8 +110,23 @@ def fit_storage(self, data):
         return self.fit(X, Y, W)
 
     def __call__(self, data, progress_callback=None):
-        if not self.check_learner_adequacy(data.domain):
-            raise ValueError(self.learner_adequacy_err_msg)
+
+        for cls in type(self).mro():
+            if 'incompatibility_reason' in cls.__dict__:
+                incompatibility_reason = \
+                    self.incompatibility_reason(data.domain)  # pylint: disable=assignment-from-none
+                if incompatibility_reason is not None:
+                    raise ValueError(incompatibility_reason)
+                break
+            if 'check_learner_adequacy' in cls.__dict__:
+                warnings.warn(
+                    "check_learner_adequacy is deprecated and will be removed "
+                    "in upcoming releases. Learners should instead implement "
+                    "the incompatibility_reason method.",
+                    OrangeDeprecationWarning)
+                if not self.check_learner_adequacy(data.domain):
+                    raise ValueError(self.learner_adequacy_err_msg)
+                break
 
         origdomain = data.domain
 
@@ -176,6 +195,11 @@ def active_preprocessors(self):
     def check_learner_adequacy(self, _):
         return True
 
+    # pylint: disable=no-self-use
+    def incompatibility_reason(self, _: Domain) -> Optional[str]:
+        """Return None if a learner can fit domain or string explaining why it can not."""
+        return None
+
     @property
     def name(self):
         """Return a short name derived from Learner type name"""
@@ -436,7 +460,7 @@ def fix_dim(x):
         # Call the predictor
         backmappers = None
         n_values = []
-        if isinstance(data, (np.ndarray, scipy.sparse.csr.csr_matrix)):
+        if isinstance(data, (np.ndarray, scipy.sparse.csr_matrix)):
             prediction = self.predict(data)
         elif isinstance(data, Table):
             backmappers, n_values = self.get_backmappers(data)

Orange/canvas/__main__.py

@@ -361,12 +361,41 @@ def argument_parser(self) -> argparse.ArgumentParser:
             "--clear-widget-settings", action="store_true",
             help="Clear stored widget setting/defaults",
         )
+        parser.add_argument(
+            "--clear-all", action="store_true",
+            help="Clear all settings and caches"
+        )
         return parser
 
     def setup_logging(self):
         super().setup_logging()
         make_sql_logger(self.options.log_level)
 
+    @staticmethod
+    def _rm_tree(path):
+        log.debug("rmtree '%s'", path)
+        shutil.rmtree(path, ignore_errors=True)
+
+    def clear_widget_settings(self):
+        log.info("Clearing widget settings")
+        self._rm_tree(widget_settings_dir(versioned=True))
+        self._rm_tree(widget_settings_dir(versioned=False))
+
+    def clear_caches(self):  # pylint: disable=import-outside-toplevel
+        from Orange.misc import environ
+        log.info("Clearing caches")
+        self._rm_tree(environ.cache_dir())
+        log.info("Clearing data")
+        self._rm_tree(environ.data_dir(versioned=True))
+        self._rm_tree(environ.data_dir(versioned=False))
+
+    def clear_application_settings(self):  # pylint: disable=no-self-use
+        s = QSettings()
+        log.info("Clearing application settings")
+        log.debug("clear '%s'", s.fileName())
+        s.clear()
+        s.sync()
+
     def setup_application(self):
         super().setup_application()
         clear_settings_flag = os.path.join(widget_settings_dir(),
@@ -375,8 +404,12 @@ def setup_application(self):
         options = self.options
         if options.clear_widget_settings or \
                 os.path.isfile(clear_settings_flag):
-            log.info("Clearing widget settings")
-            shutil.rmtree(widget_settings_dir(), ignore_errors=True)
+            self.clear_widget_settings()
+
+        if options.clear_all:
+            self.clear_widget_settings()
+            self.clear_caches()
+            self.clear_application_settings()
 
         notif_server = NotificationServer()
         canvas.notification_server_instance = notif_server
@@ -410,7 +443,7 @@ def onPaletteChange():
         app.paletteChanged.connect(onPaletteChange)
         onPaletteChange()
 
-    def show_splash_message(self, message: str, color=QColor("#FFD39F")):
+    def show_splash_message(self, message: str, color=QColor("#FFFFFF")):
         super().show_splash_message(message, color)
 
     def create_main_window(self):

Orange/canvas/config.py

@@ -2,6 +2,7 @@
 Orange Canvas Configuration
 
 """
+import random
 import uuid
 import warnings
 
@@ -98,39 +99,37 @@ def application_icon():
         Return the main application icon.
         """
         path = pkg_resources.resource_filename(
-            __name__, "icons/orange-canvas.svg"
+            __name__, "icons/orange-256.png"
         )
         return QIcon(path)
 
     @staticmethod
     def splash_screen():
+        splash_n = random.randint(1, 3)
         path = pkg_resources.resource_filename(
-            __name__, "icons/orange-splash-screen.png")
+            __name__, f"icons/orange-splash-screen-{splash_n:02}.png")
         pm = QPixmap(path)
 
         version = Config.ApplicationVersion
         if version:
             version_parsed = LooseVersion(version)
             version_comp = version_parsed.version
             version = ".".join(map(str, version_comp[:2]))
-        size = 21 if len(version) < 5 else 16
+        size = 13
         font = QFont("Helvetica")
         font.setPixelSize(size)
-        font.setBold(True)
-        font.setItalic(True)
-        font.setLetterSpacing(QFont.AbsoluteSpacing, 2)
         metrics = QFontMetrics(font)
-        br = metrics.boundingRect(version).adjusted(-5, 0, 5, 0)
-        br.moveCenter(QPoint(436, 224))
+        br = metrics.boundingRect(version)
+        br.moveTopLeft(QPoint(171, 438))
 
         p = QPainter(pm)
         p.setRenderHint(QPainter.Antialiasing)
         p.setRenderHint(QPainter.TextAntialiasing)
         p.setFont(font)
-        p.setPen(QColor("#231F20"))
-        p.drawText(br, Qt.AlignCenter, version)
+        p.setPen(QColor("#000000"))
+        p.drawText(br, Qt.AlignLeft, version)
         p.end()
-        return pm, QRect(88, 193, 200, 20)
+        return pm, QRect(23, 24, 200, 20)
 
     @staticmethod
     def widgets_entry_points():