Expose USE_TRANSFER_FUNCTION_CHARTS

Control wether the CTK VTK chart related classes can be compiled.
It depends on the VTK version used.

Libs/Visualization/VTK/Widgets/CMakeLists.txt

@@ -82,9 +82,9 @@ SET(VTK_LIBRARIES
   QVTK
   )
 
-IF(VTK_VERSION VERSION_GREATER 5.7)
+IF(CTK_LIB_Visualization/VTK/Widgets_USE_TRANSFER_FUNCTION_CHARTS)
   SET(CTK_USE_CHARTS 1)
-ENDIF(VTK_VERSION VERSION_GREATER 5.7)
+ENDIF()
 
 IF (${CTK_USE_CHARTS})
   SET(KIT_SRCS

Libs/Visualization/VTK/Widgets/ctk_library_options.cmake

@@ -0,0 +1,10 @@
+#
+# See CMake/ctkMacroAddCtkLibraryOptions.cmake
+#
+# This file should list of options available for considered CTK library
+# For example: MYOPT1:OFF MYOPT2:ON
+#
+
+SET(ctk_library_options
+  USE_TRANSFER_FUNCTION_CHARTS:OFF
+  )