Revert change to ScrollbarRange; fix linux dependencies.

.github/workflows/test-with-pip.yml

@@ -37,7 +37,7 @@ jobs:
           sudo apt-get install libglu1-mesa-dev
           # needed for Celiagg
           sudo apt-get install libfreetype-dev libharfbuzz-dev
-        if: matrix.os == 'linux'
+        if: matrix.os == 'ubuntu-latest'
       - name: Install build dependencies
         run: |
           python -m pip install -U pip wheel

enable/enable_traits.py

@@ -171,10 +171,10 @@ def validate(self, object, name, value):
                 page_size = max(min(page_size, high - low), 0.0)
                 line_size = max(min(line_size, page_size), 0.0)
                 return (
-                    int(low),
-                    int(high),
-                    int(page_size),
-                    int(line_size),
+                    float(low),
+                    float(high),
+                    float(page_size),
+                    float(line_size),
                 )
             except Exception:
                 self.error(object, name, value)

enable/qt4/scrollbar.py

@@ -164,11 +164,12 @@ def _update_control(self, enable_range, value):
         # invert values for vertical ranges because of coordinate system issues
         value = self._correct_value(value, minimum, max_value)
 
-        self._control.setMinimum(minimum)
-        self._control.setMaximum(max_value)
-        self._control.setValue(value)
-        self._control.setPageStep(page_size)
-        self._control.setSingleStep(line_size)
+        # Need explicit cast to int() for Python 3.10 + PyQt5
+        self._control.setMinimum(int(minimum))
+        self._control.setMaximum(int(max_value))
+        self._control.setValue(int(value))
+        self._control.setPageStep(int(page_size))
+        self._control.setSingleStep(int(line_size))
 
     def _correct_value(self, value, min_value, max_value):
         """ Correct vertical position values for Qt and Enable conventions
@@ -186,8 +187,8 @@ def _correct_value(self, value, min_value, max_value):
             the scrolled component, less the page size).
         """
         if self.orientation != "vertical":
-            return int(value)
-        return int(max_value - (value - min_value))
+            return value
+        return max_value - (value - min_value)
 
     # ------------------------------------------------------------------------
     # Qt Event handlers