[Sofa.Gui] Add dependant option to not bind qt/qglviewer to Sofa.Gui …

…(even if present) (#445)

* Deactivate gui bindings when lib is not found

* Changed activaiton mechanism to be more axplicit and follows SOFAEXPORTER one

* fix comment

* add (dependant) option to not necessarily bind qt/qglviewer guis to Sofa.Gui

---------

Co-authored-by: bakpaul <bakpaul@hotmail.fr>
Co-authored-by: Paul Baksic <paul.baksic@outlook.fr>

bindings/SofaGui/CMakeLists.txt

@@ -16,15 +16,20 @@ sofa_find_package(Sofa.Core REQUIRED)
 sofa_find_package(Sofa.GUI.Common REQUIRED) # to get the GUI mechanism
 
 sofa_find_package(Sofa.GUI.Batch QUIET)
-if(Sofa.GUI.Batch_FOUND)
+CMAKE_DEPENDENT_OPTION(SP3_WITH_SOFAGUIBATCH "Enable the SOFA batch gui component." ON "Sofa.GUI.Batch_FOUND" OFF)
+if(Sofa.GUI.Batch_FOUND AND SP3_WITH_SOFAGUIBATCH)
      list(APPEND SUPPORTED_GUIS Sofa.GUI.Batch)
 endif()
+
 sofa_find_package(Sofa.GUI.Qt QUIET)
-if(Sofa.GUI.Qt_FOUND)
+CMAKE_DEPENDENT_OPTION(SP3_WITH_SOFAGUIQT "Enable the SOFA Qt gui component." ON "Sofa.GUI.Qt_FOUND" OFF)
+if(Sofa.GUI.Qt_FOUND AND SP3_WITH_SOFAGUIQT)
      list(APPEND SUPPORTED_GUIS Sofa.GUI.Qt)
 endif()
+
 sofa_find_package(Sofa.GUI.HeadlessRecorder QUIET)
-if(Sofa.GUI.HeadlessRecorder_FOUND)
+CMAKE_DEPENDENT_OPTION(SP3_WITH_SOFAGUIHEADLESSRECORDER "Enable the SOFA HeadlessRecorder gui component." ON "Sofa.GUI.HeadlessRecorder_FOUND" OFF)
+if(Sofa.GUI.HeadlessRecorder_FOUND AND SP3_WITH_SOFAGUIHEADLESSRECORDER)
      list(APPEND SUPPORTED_GUIS Sofa.GUI.HeadlessRecorder)
 endif()