Workaround crash on mac platform with non-default themes

koordinates/gui/date_filter_widget.py

@@ -14,15 +14,16 @@
     QSizePolicy
 )
 from qgis.gui import (
-    QgsRangeSlider,
     QgsDateEdit
 )
 
 from .filter_widget_combo_base import FilterWidgetComboBase
 from ..api import DataBrowserQuery
+from .range_slider import RangeSlider
 
 DATE_FORMAT = 'dd MMM yyyy'
 
+from qgis.PyQt.QtCore import QSize
 
 class ClearableDateEdit(QgsDateEdit):
 
@@ -66,7 +67,7 @@ def __init__(self, parent):
         published_date_label.setFont(bold_font)
         vl.addWidget(published_date_label)
 
-        self.published_date_slider = QgsRangeSlider()
+        self.published_date_slider = RangeSlider()
         self.published_date_slider.setMinimumHeight(self.fontMetrics().height())
         vl.addWidget(self.published_date_slider)
 
@@ -94,7 +95,7 @@ def __init__(self, parent):
         updated_date_label.setFont(bold_font)
         vl.addWidget(updated_date_label)
 
-        self.updated_date_slider = QgsRangeSlider()
+        self.updated_date_slider = RangeSlider()
         self.updated_date_slider.setMinimumHeight(self.fontMetrics().height())
         vl.addWidget(self.updated_date_slider)
 

koordinates/gui/range_slider.py

@@ -0,0 +1,20 @@
+import platform
+from qgis.PyQt.QtCore import QSize
+from qgis.gui import QgsRangeSlider
+
+
+class RangeSlider(QgsRangeSlider):
+    """
+    Avoids a crash when non-standard application themes are used on the
+    mac platform.
+
+    Relates to https://bugreports.qt.io/browse/QTBUG-43398
+    https://bugreports.qt.io/browse/QTBUG-44316?focusedCommentId=272257
+    """
+
+    def sizeHint(self):
+        if platform.system() == 'Darwin':
+            # sizeHint crashes on mac for hidden QSlider widgets
+            return QSize(100, 30)
+
+        return super().sizeHint()

koordinates/gui/resolution_filter_widget.py

@@ -6,10 +6,10 @@
     QHBoxLayout,
     QLabel
 )
-from qgis.gui import QgsRangeSlider
 
 from .filter_widget_combo_base import FilterWidgetComboBase
 from ..api import DataBrowserQuery
+from .range_slider import RangeSlider
 
 
 class ResolutionFilterWidget(FilterWidgetComboBase):
@@ -22,7 +22,7 @@ def __init__(self, parent):
 
         self.drop_down_widget = QWidget()
         vl = QVBoxLayout()
-        self.slider = QgsRangeSlider()
+        self.slider = RangeSlider()
         self.slider.setMinimumHeight(self.fontMetrics().height())
         vl.addWidget(self.slider)