Disable direct parameter value input when data defined override is set

python/plugins/processing/gui/NumberInputPanel.py

@@ -198,6 +198,7 @@ def __init__(self, param):
             self.btnDataDefined = None
         else:
             self.btnDataDefined.init(0, QgsProperty(), self.param.dynamicPropertyDefinition())
+            self.btnDataDefined.registerEnabledWidget(self.spnValue, False)
 
         self.spnValue.valueChanged.connect(lambda: self.hasChanged.emit())