From d11bec96881d37751f5b6028ca31c531e1f37c8c Mon Sep 17 00:00:00 2001
From: "Zheng, Lei" <realthunder.dev@gmail.com>
Date: Fri, 16 Apr 2021 16:44:05 +0800
Subject: [PATCH] App: change API signature
 DocumentObjectExtension::extensionIsElementVisible

---
 src/App/DocumentObjectExtension.h | 2 +-
 src/App/Link.cpp                  | 2 +-
 src/App/Link.h                    | 2 +-
 3 files changed, 3 insertions(+), 3 deletions(-)

diff --git a/src/App/DocumentObjectExtension.h b/src/App/DocumentObjectExtension.h
index 8b7ba82a39..538355d213 100644
--- a/src/App/DocumentObjectExtension.h
+++ b/src/App/DocumentObjectExtension.h
@@ -96,7 +96,7 @@ public:
             Base::Matrix4D *mat, bool transform, int depth) const;
 
     virtual int extensionSetElementVisible(const char *, bool) {return -1;}
-    virtual int extensionIsElementVisible(const char *) {return -1;}
+    virtual int extensionIsElementVisible(const char *) const {return -1;}
     virtual bool extensionHasChildElement() const {return false;}
 };
 
diff --git a/src/App/Link.cpp b/src/App/Link.cpp
index 62180f05ac..e9d9d1c6a1 100644
--- a/src/App/Link.cpp
+++ b/src/App/Link.cpp
@@ -1012,7 +1012,7 @@ int LinkBaseExtension::extensionSetElementVisible(const char *element, bool visi
     return -1;
 }
 
-int LinkBaseExtension::extensionIsElementVisible(const char *element) {
+int LinkBaseExtension::extensionIsElementVisible(const char *element) const {
     int index = _getShowElementValue()?getElementIndex(element):getArrayIndex(element);
     if(index>=0) {
         auto propElementVis = getVisibilityListProperty();
diff --git a/src/App/Link.h b/src/App/Link.h
index a9b3adc6b0..f0aa368a74 100644
--- a/src/App/Link.h
+++ b/src/App/Link.h
@@ -293,7 +293,7 @@ public:
     virtual void onExtendedDocumentRestored() override;
 
     virtual int extensionSetElementVisible(const char *, bool) override;
-    virtual int extensionIsElementVisible(const char *) override;
+    virtual int extensionIsElementVisible(const char *) const override;
     virtual bool extensionHasChildElement() const override;
 
     virtual PyObject* getExtensionPyObject(void) override;