CURA-4853 evaluate layer view compatibility mode in init, therefore not binding some signals and fixing the bug

plugins/SimulationView/SimulationView.py

@@ -98,11 +98,14 @@ class SimulationView(View):
 
         self._solid_layers = int(Preferences.getInstance().getValue("view/top_layer_count"))
         self._only_show_top_layers = bool(Preferences.getInstance().getValue("view/only_show_top_layers"))
-        self._compatibility_mode = True  # for safety
+        self._compatibility_mode = self._evaluateCompatibilityMode()
 
         self._wireprint_warning_message = Message(catalog.i18nc("@info:status", "Cura does not accurately display layers when Wire Printing is enabled"),
                                                   title = catalog.i18nc("@info:title", "Simulation View"))
 
+    def _evaluateCompatibilityMode(self):
+        return OpenGLContext.isLegacyOpenGL() or bool(Preferences.getInstance().getValue("view/force_layer_view_compatibility_mode"))
+
     def _resetSettings(self):
         self._layer_view_type = 0  # 0 is material color, 1 is color by linetype, 2 is speed, 3 is layer thickness
         self._extruder_count = 0
@@ -127,7 +130,7 @@ class SimulationView(View):
             # Currently the RenderPass constructor requires a size > 0
             # This should be fixed in RenderPass's constructor.
             self._layer_pass = SimulationPass(1, 1)
-            self._compatibility_mode = OpenGLContext.isLegacyOpenGL() or bool(Preferences.getInstance().getValue("view/force_layer_view_compatibility_mode"))
+            self._compatibility_mode = self._evaluateCompatibilityMode()
             self._layer_pass.setSimulationView(self)
         return self._layer_pass
 
@@ -534,8 +537,7 @@ class SimulationView(View):
     def _updateWithPreferences(self):
         self._solid_layers = int(Preferences.getInstance().getValue("view/top_layer_count"))
         self._only_show_top_layers = bool(Preferences.getInstance().getValue("view/only_show_top_layers"))
-        self._compatibility_mode = OpenGLContext.isLegacyOpenGL() or bool(
-            Preferences.getInstance().getValue("view/force_layer_view_compatibility_mode"))
+        self._compatibility_mode = self._evaluateCompatibilityMode()
 
         self.setSimulationViewType(int(float(Preferences.getInstance().getValue("layerview/layer_view_type"))));