Gui: [skip ci] add method to ignore to merge icon of an extension that is e.g. used for Part primitives

src/Gui/ViewProvider.cpp

@@ -312,7 +312,8 @@ QIcon ViewProvider::mergeOverlayIcons (const QIcon & orig) const
     QIcon overlayedIcon = orig;
 
     for (Gui::ViewProviderExtension* ext : vector) {
-        overlayedIcon = ext->extensionMergeOverlayIcons(overlayedIcon);
+        if (!ext->ignoreOverlayIcon())
+            overlayedIcon = ext->extensionMergeOverlayIcons(overlayedIcon);
     }
 
     return overlayedIcon;

src/Gui/ViewProviderExtension.h

@@ -94,6 +94,12 @@ public:
     //update data of extended opject
     virtual void extensionUpdateData(const App::Property*);
 
+    void setIgnoreOverlayIcon(bool on) {
+        m_ignoreOverlayIcon = on;
+    }
+    bool ignoreOverlayIcon() const {
+        return m_ignoreOverlayIcon;
+    }
     virtual QIcon extensionMergeOverlayIcons(const QIcon & orig) const {return orig;}
 
     virtual void extensionStartRestoring() {}
@@ -103,6 +109,7 @@ public:
     virtual bool extensionGetDetailPath(const char *, SoFullPath *, SoDetail *&) const {return false;}
     
 private:
+    bool m_ignoreOverlayIcon = false;
   //Gui::ViewProviderDocumentObject* m_viewBase = nullptr;
 };
 

src/Mod/Part/Gui/ViewProviderPrimitive.cpp

@@ -52,6 +52,7 @@ PROPERTY_SOURCE(PartGui::ViewProviderPrimitive, PartGui::ViewProviderPart)
 ViewProviderPrimitive::ViewProviderPrimitive()
 {
     extension.initExtension(this);
+    extension.setIgnoreOverlayIcon(true);
 }
 
 ViewProviderPrimitive::~ViewProviderPrimitive()