diff --git a/src/CMakeLists.txt b/src/CMakeLists.txt
index f43492b7..2adf192d 100644
--- a/src/CMakeLists.txt
+++ b/src/CMakeLists.txt
@@ -423,17 +423,20 @@ list(APPEND SOURCES
 )
 
 list(APPEND HEADERS
-    controls/LevelingSensor/QskSGNodeUtility.h
-    controls/LevelingSensor/QskLevelingSensor.h
-    controls/LevelingSensor/QskLevelingSensorNodes.h
-    controls/LevelingSensor/QskLevelingSensorSkinlet.h
-    controls/LevelingSensor/QskLevelingSensorUtility.h
+    controls/QskLevelingSensor.h
+    controls/QskLevelingSensorSkinlet.h
+)
+
+list(APPEND PRIVATE_HEADERS
+    controls/private/QskSGNodeUtility.h
+    controls/private/QskLevelingSensorNodes.h
+    controls/private/QskLevelingSensorUtility.h
 )
 
 list(APPEND SOURCES
-    controls/LevelingSensor/QskSGNodeUtility.cpp
-    controls/LevelingSensor/QskLevelingSensor.cpp
-    controls/LevelingSensor/QskLevelingSensorSkinlet.cpp
+    controls/private/QskSGNodeUtility.cpp
+    controls/private/QskLevelingSensor.cpp
+    controls/private/QskLevelingSensorSkinlet.cpp
 )
 
 if(ENABLE_PINYIN)
@@ -468,6 +471,9 @@ target_include_directories(${target} PUBLIC
     $<BUILD_INTERFACE:${CMAKE_CURRENT_LIST_DIR}/layouts>
     $<BUILD_INTERFACE:${CMAKE_CURRENT_LIST_DIR}/nodes>)
 
+target_include_directories(${target} PRIVATE
+    $<BUILD_INTERFACE:${CMAKE_CURRENT_LIST_DIR}/controls/private>)
+
 target_link_libraries(${target}
     PUBLIC Qt::Core Qt::CorePrivate Qt::Quick Qt::QuickPrivate)
 
@@ -495,6 +501,10 @@ set_target_properties(${target}
 
 list(TRANSFORM HEADERS PREPEND "${CMAKE_CURRENT_LIST_DIR}/")
 set_target_properties(${target} PROPERTIES PUBLIC_HEADER "${HEADERS}")
+
+list(TRANSFORM PRIVATE_HEADERS PREPEND "${CMAKE_CURRENT_LIST_DIR}/")
+set_target_properties(${target} PROPERTIES PRIVATE_HEADER "${PRIVATE_HEADERS}")
+
 set_target_properties(${target} PROPERTIES
     VERSION ${CMAKE_PROJECT_VERSION} SOVERSION ${PROJECT_VERSION_MAJOR}.${PROJECT_VERSION_MINOR} )
 
diff --git a/src/controls/LevelingSensor/QskLevelingSensor.h b/src/controls/QskLevelingSensor.h
similarity index 100%
rename from src/controls/LevelingSensor/QskLevelingSensor.h
rename to src/controls/QskLevelingSensor.h
diff --git a/src/controls/LevelingSensor/QskLevelingSensorSkinlet.h b/src/controls/QskLevelingSensorSkinlet.h
similarity index 100%
rename from src/controls/LevelingSensor/QskLevelingSensorSkinlet.h
rename to src/controls/QskLevelingSensorSkinlet.h
diff --git a/src/controls/LevelingSensor/QskLevelingSensor.cpp b/src/controls/private/QskLevelingSensor.cpp
similarity index 98%
rename from src/controls/LevelingSensor/QskLevelingSensor.cpp
rename to src/controls/private/QskLevelingSensor.cpp
index 8c73f0b0..fd4f7bd9 100644
--- a/src/controls/LevelingSensor/QskLevelingSensor.cpp
+++ b/src/controls/private/QskLevelingSensor.cpp
@@ -1,4 +1,4 @@
-#include "QskLevelingSensor.h"
+#include <QskLevelingSensor.h>
 #include <QskFunctions.h>
 #include <QskScaleTickmarks.h>
 #include <unordered_map>
diff --git a/src/controls/LevelingSensor/QskLevelingSensorNodes.h b/src/controls/private/QskLevelingSensorNodes.h
similarity index 100%
rename from src/controls/LevelingSensor/QskLevelingSensorNodes.h
rename to src/controls/private/QskLevelingSensorNodes.h
diff --git a/src/controls/LevelingSensor/QskLevelingSensorSkinlet.cpp b/src/controls/private/QskLevelingSensorSkinlet.cpp
similarity index 99%
rename from src/controls/LevelingSensor/QskLevelingSensorSkinlet.cpp
rename to src/controls/private/QskLevelingSensorSkinlet.cpp
index 51102fb5..c56cdd8e 100644
--- a/src/controls/LevelingSensor/QskLevelingSensorSkinlet.cpp
+++ b/src/controls/private/QskLevelingSensorSkinlet.cpp
@@ -1,5 +1,5 @@
-#include "QskLevelingSensorSkinlet.h"
-#include "QskLevelingSensor.h"
+#include <QskLevelingSensorSkinlet.h>
+#include <QskLevelingSensor.h>
 #include "QskLevelingSensorUtility.h"
 #include "QskLevelingSensorNodes.h"
 #include "QskSGNodeUtility.h"
diff --git a/src/controls/LevelingSensor/QskLevelingSensorUtility.h b/src/controls/private/QskLevelingSensorUtility.h
similarity index 100%
rename from src/controls/LevelingSensor/QskLevelingSensorUtility.h
rename to src/controls/private/QskLevelingSensorUtility.h
diff --git a/src/controls/LevelingSensor/QskSGNodeUtility.cpp b/src/controls/private/QskSGNodeUtility.cpp
similarity index 100%
rename from src/controls/LevelingSensor/QskSGNodeUtility.cpp
rename to src/controls/private/QskSGNodeUtility.cpp
diff --git a/src/controls/LevelingSensor/QskSGNodeUtility.h b/src/controls/private/QskSGNodeUtility.h
similarity index 100%
rename from src/controls/LevelingSensor/QskSGNodeUtility.h
rename to src/controls/private/QskSGNodeUtility.h