Documentation/Labs/Qt5-and-VTK8

This page will document experiments related to the upgrade of Slicer base to Qt5.

Progress

• VTK:
  • Support for QVTKWidget/QVTKWidget2: Done
  • QML support for VTK render windows: To Be Done - Not yet required by Slicer core - We experimented with few approaches internally and some possible approaches.

• CTK support: Done

• ITKv4: NA

• PythonQt: Done

• Slicer build system upgrade: To be done
  • Add a switch similar to what is done in CTK (Add option Slicer_QT_VERSION that can be set to either 4 or 5)
  • Update use of QT4_* macros (see below)
  • Update packaging scripts (SlicerBlockInstallQt.cmake, SlicerCPackBundleFixup.cmake)
  • Update build script to support qt5 (see https://github.com/jcfr/qt-easy-build )
  • Update Slicer build instruction on developer wiki

• Usage of QT4_ macros:

$ ack --cmake -i "qt4"
CMake/SlicerMacroBuildModuleQtLibrary.cmake
116:  QT4_WRAP_CPP(MODULEQTLIBRARY_MOC_OUTPUT ${MODULEQTLIBRARY_MOC_SRCS})
118:  QT4_WRAP_UI(MODULEQTLIBRARY_UI_CXX ${MODULEQTLIBRARY_UI_SRCS})
121:    QT4_ADD_RESOURCES(MODULEQTLIBRARY_QRC_SRCS ${MODULEQTLIBRARY_RESOURCES})
127:  QT4_ADD_RESOURCES(MODULEQTLIBRARY_QRC_SRCS ${Slicer_LOGOS_RESOURCE})

CMake/SlicerMacroTranslation.cmake
83:    QT4_CREATE_TRANSLATION(QM_OUTPUT_FILES ${FILES_TO_TRANSLATE} ${TS_FILES})
85:    QT4_ADD_TRANSLATION(QM_OUTPUT_FILES ${TS_FILES})

CMake/SlicerMacroBuildQtModule.cmake
132:  QT4_WRAP_CPP(LOADABLEMODULE_MOC_OUTPUT ${LOADABLEMODULE_MOC_SRCS})
134:  QT4_WRAP_UI(LOADABLEMODULE_UI_CXX ${LOADABLEMODULE_UI_SRCS})
137:    QT4_ADD_RESOURCES(LOADABLEMODULE_QRC_SRCS ${LOADABLEMODULE_RESOURCES})
143:  QT4_ADD_RESOURCES(LOADABLEMODULE_QRC_SRCS ${Slicer_LOGOS_RESOURCE})

CMake/SlicerMacroBuildApplication.cmake
141:  QT4_WRAP_CPP(SLICERAPPLIB_MOC_OUTPUT ${SLICERAPPLIB_MOC_SRCS})
142:  QT4_WRAP_UI(SLICERAPPLIB_UI_CXX ${SLICERAPPLIB_UI_SRCS})
144:    QT4_ADD_RESOURCES(SLICERAPPLIB_QRC_SRCS ${SLICERAPPLIB_RESOURCES})

CMake/SlicerBlockFindQtAndCheckVersion.cmake
22:# The CMake code used to find Qt4 has been factored out into this CMake script so that
27:  find_package(Qt4)
28:  if(NOT QT4_FOUND)

CMake/SlicerMacroBuildBaseQtLibrary.cmake
35:#                           using QT4_WRAP_CPP CMake macro
38:#                           QT4_WRAP_UI CMake macro
47:#                           using QT4_ADD_RESOURCES
141:  QT4_WRAP_CPP(SLICERQTBASELIB_MOC_OUTPUT ${SLICERQTBASELIB_MOC_SRCS})
142:  QT4_WRAP_UI(SLICERQTBASELIB_UI_CXX ${SLICERQTBASELIB_UI_SRCS})
144:    QT4_ADD_RESOURCES(SLICERQTBASELIB_QRC_SRCS ${SLICERQTBASELIB_RESOURCES})
147:  QT4_ADD_RESOURCES(SLICERQTBASELIB_QRC_SRCS ${Slicer_SOURCE_DIR}/Resources/qSlicer.qrc)

Modules/Loadable/Models/Testing/Cxx/CMakeLists.txt
15:QT4_GENERATE_MOCS(

Modules/Loadable/Transforms/Testing/Cxx/CMakeLists.txt
9:QT4_GENERATE_MOCS(

Modules/Loadable/VolumeRendering/Testing/Cxx/CMakeLists.txt
36:QT4_GENERATE_MOCS(

Libs/MRML/Widgets/CMakeLists.txt
363:QT4_WRAP_CPP(MRMLWidgets_MOC_CXX ${MRMLWidgets_MOC_SRCS})
364:QT4_WRAP_UI(MRMLWidgets_UI_CXX ${MRMLWidgets_UI_SRCS})
365:QT4_ADD_RESOURCES(MRMLWidgets_QRC_CXX ${MRMLWidgets_QRC_SRCS})

Libs/MRML/Widgets/Testing/CMakeLists.txt
139:QT4_WRAP_CPP(Tests_MOC_CXX ${Tests_MOC_SRCS})
140:QT4_GENERATE_MOCS(

CMakeLists.txt
570:# Module name should be specified as they appear in FindQt4.cmake

Base/QTCore/Testing/Cxx/CMakeLists.txt
37:  QT4_GENERATE_MOCS(
42:    QT4_GENERATE_MOCS(
49:    QT4_GENERATE_MOCS(
54:  QT4_ADD_RESOURCES(Tests Resources/${KIT}Testing.qrc)
60:    list(APPEND KIT_TEST_TARGET_LIBRARIES Qt4::QtTest)

Base/QTGUI/Testing/Cxx/CMakeLists.txt
45:    QT4_GENERATE_MOCS(${KIT_TEST_MOC_SRCS})
48:  QT4_ADD_RESOURCES(Tests Resources/${KIT}Testing.qrc)

References

• Qt 4.8 support schedule info: http://slicer-devel.65872.n3.nabble.com/Fwd-Qt-4-8-x-support-extended-out-by-a-year-td4033248.html