Fix slider in image contrast editor on python >=3.10

.github/workflows/codeql.yml

@@ -17,6 +17,7 @@ on:
       - '**/*.md'
       - '**/*.rst'
       - '**/*.txt'
+      - 'hyperspy_gui_traitsui/_external/*.py'
   schedule:
     # run once a week
     - cron: '16 13 * * 5'

.github/workflows/tests.yml

@@ -43,7 +43,6 @@ jobs:
         # correct version with setuptools_scm
         run: |
           git remote add upstream https://github.com/hyperspy/hyperspy_gui_traitsui.git
-          git fetch --prune --unshallow
           git fetch upstream --tags
 
       - uses: actions/setup-python@v5
@@ -76,12 +75,16 @@ jobs:
       - name: Install HyperSpy (RELEASE_next_major)
         if: contains( matrix.LABEL, 'RnM')
         run: |
-          pip install git+https://github.com/hyperspy/hyperspy.git@RELEASE_next_major
+          # pip install git+https://github.com/hyperspy/hyperspy.git@RELEASE_next_major
+          # revert back when hyperspy 2.1 is released 
+          pip install git+https://github.com/hyperspy/hyperspy.git@RELEASE_next_minor
 
       - name: Install HyperSpy (RELEASE_next_patch)
         if: contains( matrix.LABEL, 'RnP')
         run: |
-          pip install git+https://github.com/hyperspy/hyperspy.git@RELEASE_next_patch
+          # pip install git+https://github.com/hyperspy/hyperspy.git@RELEASE_next_patch
+          # revert back when hyperspy 2.1 is released 
+          pip install git+https://github.com/hyperspy/hyperspy.git@RELEASE_next_minor
 
       - name: Install exSpy
         if: ${{ ! contains( matrix.LABEL, 'minimum') }}

CHANGES.md

@@ -4,6 +4,7 @@
 
 ## v2.1 (UNRELEASED)
 
+* Fix slider in image contrast editor on python >=3.10 ([#76](https://github.com/hyperspy/hyperspy_gui_traitsui/pull/76)).
 * Fix getting version with editable installation ([#75](https://github.com/hyperspy/hyperspy_gui_traitsui/pull/75)).
 * Add releasing guide and release script ([#75](https://github.com/hyperspy/hyperspy_gui_traitsui/pull/75)).
 * Fix regression with editable installation ([#74](https://github.com/hyperspy/hyperspy_gui_traitsui/pull/74)).

hyperspy_gui_traitsui/_external/bounds_editor.py

@@ -0,0 +1,211 @@
+# (C) Copyright 2004-2023 Enthought, Inc., Austin, TX
+# All rights reserved.
+#
+# This software is provided without warranty under the terms of the BSD
+# license included in LICENSE.txt and may be redistributed only under
+# the conditions described in the aforementioned license. The license
+# is also available online at http://www.enthought.com/licenses/BSD.txt
+#
+# Thanks for using Enthought open source!
+
+# Use upstream version when https://github.com/enthought/traitsui/pull/2048
+# is merged and release
+
+from pyface.qt import QtGui, QtCore
+
+from traits.api import Float, Any, Str, Union
+
+from traitsui.editors.api import RangeEditor
+try:
+    from traitsui.qt.editor import Editor
+except:
+    from traitsui.qt4.editor import Editor
+from .range_slider import RangeSlider
+
+
+class _BoundsEditor(Editor):
+
+    evaluate = Any()
+
+    min = Any()
+    max = Any()
+    low = Any()
+    high = Any()
+    format_str = Str()
+
+    def init(self, parent):
+        """Finishes initializing the editor by creating the underlying toolkit
+        widget.
+        """
+        factory = self.factory
+        if not factory.low_name:
+            self.low = factory.low
+
+        if not factory.high_name:
+            self.high = factory.high
+
+        self.max = factory.max
+        self.min = factory.min
+
+        self.format_str = factory.format_str
+
+        self.evaluate = factory.evaluate
+        self.sync_value(factory.evaluate_name, "evaluate", "from")
+
+        self.sync_value(factory.low_name, "low", "both")
+        self.sync_value(factory.high_name, "high", "both")
+
+        self.control = QtGui.QWidget()
+        panel = QtGui.QHBoxLayout(self.control)
+        panel.setContentsMargins(0, 0, 0, 0)
+
+        self._label_lo = QtGui.QLineEdit(self.format_str % self.low)
+        self._label_lo.editingFinished.connect(self.update_low_on_enter)
+        panel.addWidget(self._label_lo)
+
+        # The default size is a bit too big and probably doesn't need to grow.
+        sh = self._label_lo.sizeHint()
+        sh.setWidth(sh.width() // 2)
+        self._label_lo.setMaximumSize(sh)
+
+        self.control.slider = slider = RangeSlider(QtCore.Qt.Orientation.Horizontal)
+        slider.setTracking(factory.auto_set)
+        slider.setMinimum(0)
+        slider.setMaximum(10000)
+        slider.setPageStep(1000)
+        slider.setSingleStep(100)
+        slider.setLow(self._convert_to_slider(self.low))
+        slider.setHigh(self._convert_to_slider(self.high))
+
+        slider.sliderMoved.connect(self.update_object_on_scroll)
+        panel.addWidget(slider)
+
+        self._label_hi = QtGui.QLineEdit(self.format_str % self.high)
+        self._label_hi.editingFinished.connect(self.update_high_on_enter)
+        panel.addWidget(self._label_hi)
+
+        # The default size is a bit too big and probably doesn't need to grow.
+        sh = self._label_hi.sizeHint()
+        sh.setWidth(sh.width() // 2)
+        self._label_hi.setMaximumSize(sh)
+
+        self.set_tooltip(slider)
+        self.set_tooltip(self._label_lo)
+        self.set_tooltip(self._label_hi)
+
+    def update_low_on_enter(self):
+        try:
+            try:
+                low = eval(str(self._label_lo.text()).strip())
+                if self.evaluate is not None:
+                    low = self.evaluate(low)
+            except Exception as ex:
+                low = self.low
+                self._label_lo.setText(self.format_str % self.low)
+
+            if not self.factory.is_float:
+                low = int(low)
+
+            if low > self.high:
+                low = self.high - self._step_size()
+                self._label_lo.setText(self.format_str % low)
+
+            self.control.slider.setLow(self._convert_to_slider(low))
+            self.low = low
+        except:
+            pass
+
+    def update_high_on_enter(self):
+        try:
+            try:
+                high = eval(str(self._label_hi.text()).strip())
+                if self.evaluate is not None:
+                    high = self.evaluate(high)
+            except:
+                high = self.high
+                self._label_hi.setText(self.format_str % self.high)
+
+            if not self.factory.is_float:
+                high = int(high)
+
+            if high < self.low:
+                high = self.low + self._step_size()
+                self._label_hi.setText(self.format_str % high)
+
+            self.control.slider.setHigh(self._convert_to_slider(high))
+            self.high = high
+        except:
+            pass
+
+    def update_object_on_scroll(self, pos):
+        low = self._convert_from_slider(self.control.slider.low())
+        high = self._convert_from_slider(self.control.slider.high())
+
+        if self.factory.is_float:
+            self.low = low
+            self.high = high
+        else:
+            self.low = int(low)
+            self.high = int(high)
+
+            # update the sliders to the int values or the sliders
+            # will jiggle
+            self.control.slider.setLow(self._convert_to_slider(low))
+            self.control.slider.setHigh(self._convert_to_slider(high))
+
+    def update_editor(self):
+        return
+
+    def _check_max_and_min(self):
+        # check if max & min have been defined:
+        if self.max is None:
+            self.max = self.high
+        if self.min is None:
+            self.min = self.low
+
+    def _step_size(self):
+        slider_delta = (
+            self.control.slider.maximum() - self.control.slider.minimum()
+        )
+        range_delta = self.max - self.min
+
+        return float(range_delta) / slider_delta
+
+    def _convert_from_slider(self, slider_val):
+        self._check_max_and_min()
+        return self.min + slider_val * self._step_size()
+
+    def _convert_to_slider(self, value):
+        self._check_max_and_min()
+        return (
+            self.control.slider.minimum()
+            + (value - self.min) / self._step_size()
+        )
+
+    def _low_changed(self, low):
+        if self.control is None:
+            return
+        if self._label_lo is not None:
+            self._label_lo.setText(self.format_str % low)
+
+        self.control.slider.setLow(self._convert_to_slider(low))
+
+    def _high_changed(self, high):
+        if self.control is None:
+            return
+        if self._label_hi is not None:
+            self._label_hi.setText(self.format_str % high)
+
+        self.control.slider.setHigh(self._convert_to_slider(self.high))
+
+
+class BoundsEditor(RangeEditor):
+
+    min = Union(None, Float)
+    max = Union(None, Float)
+
+    def _get_simple_editor_class(self):
+        return _BoundsEditor
+
+    def _get_custom_editor_class(self):
+        return _BoundsEditor