# we need Qt
SET(QT_MAX_VERSION "4.9.9")
INCLUDE( ${CMAKE_ROOT}/Modules/FindQt.cmake )

# set up sources to build
SET ( QVTKLibSrcs
    QVTKWidget.cxx
    vtkEventQtSlotConnect.cxx)

SET ( QVTKMocHeaders
    QVTKWidget.h)

SET ( QVTKExtraMoc
    vtkEventQtSlotConnect.cxx)

SET ( PluginMocHeaders
    QVTKWidget.h)

IF(QT_INST_MAJOR_VERSION GREATER 3)
	# libs for Qt4
	SET ( PluginLibSrcs
	      QVTKWidget.cxx
	      Q4VTKWidgetPlugin.cxx)

	# CMake apparently doesn't do this automatically
	SET_SOURCE_FILES_PROPERTIES(Q4VTKWidgetPlugin.cxx PROPERTIES 
		                    OBJECT_DEPENDS ${CMAKE_CURRENT_SOURCE_DIR}/QVTKWidget.xpm)
ELSE(QT_INST_MAJOR_VERSION GREATER 3)
	# libs for Qt < 4
	SET ( PluginLibSrcs
	      QVTKWidget.cxx
	      Q3VTKWidgetPlugin.cxx)

	# CMake apparently doesn't do this automatically
	SET_SOURCE_FILES_PROPERTIES(Q3VTKWidgetPlugin.cxx PROPERTIES 
		                    OBJECT_DEPENDS ${CMAKE_CURRENT_SOURCE_DIR}/QVTKWidget.xpm)
ENDIF(QT_INST_MAJOR_VERSION GREATER 3)

# help CMake with this generated moc file
SET_SOURCE_FILES_PROPERTIES(vtkEventQtSlotConnect.cxx PROPERTIES 
                            OBJECT_DEPENDS ${CMAKE_CURRENT_BINARY_DIR}/moc_vtkEventQtSlotConnect.cxx)

# assuming a Qt dll, otherwise plugins aren't possible
ADD_DEFINITIONS(-DQT_DLL)

# check for a multithreaded Qt dll
IF(QT_QT_LIBRARY MATCHES "mt")
  ADD_DEFINITIONS(-DQT_THREAD_SUPPORT)
ENDIF(QT_QT_LIBRARY MATCHES "mt")

# include Qt
INCLUDE_DIRECTORIES ( ${QT_INCLUDE_DIR} )
INCLUDE_DIRECTORIES ( ${CMAKE_CURRENT_BINARY_DIR} )

IF(QT_INST_MAJOR_VERSION GREATER 3)
        # includes for Qt4
#	INCLUDE_DIRECTORIES ( ${QT_INCLUDES} )
	INCLUDE_DIRECTORIES ( ${QT_INCLUDE_DIR} 
			      ${QT_QT_INCLUDE_DIR} 
			      ${QT_QTGUI_INCLUDE_DIR} 
			      ${QT_QTCORE_INCLUDE_DIR} 
			      ${QT_QTOPENGL_INCLUDE_DIR} )

ENDIF(QT_INST_MAJOR_VERSION GREATER 3)

QT_WRAP_CPP ( QVTK QVTKLibMocSrcs ${QVTKMocHeaders} )
QT_WRAP_CPP ( QVTK QVTKLibExtraMocSrcs ${QVTKExtraMoc} )
QT_WRAP_CPP ( QVTKWidgetPlugin PluginMocSrcs ${PluginMocHeaders} )

ADD_LIBRARY(QVTK ${QVTKLibSrcs} ${QVTKLibMocSrcs})


IF(QT_INST_MAJOR_VERSION GREATER 3)
	# libs for Qt4
	TARGET_LINK_LIBRARIES( QVTK 
	   ${QT_QTGUI_LIBRARY} 
	   ${QT_QTCORE_LIBRARY} 
	   ${QT_QTOPENGL_LIBRARY} 
	   vtkRendering 
	   vtkGraphics
	   vtkImaging 
	   vtkCommon)
ELSE(QT_INST_MAJOR_VERSION GREATER 3)
	# libs for Qt < 4
	TARGET_LINK_LIBRARIES( QVTK 
	   ${QT_QT_LIBRARY} 
	   vtkRendering 
	   vtkGraphics
	   vtkImaging 
	   vtkCommon
	)
ENDIF(QT_INST_MAJOR_VERSION GREATER 3)

# build plugin by default
# even if VTK is built as static libraries (for convenience)
SET(BUILD_QVTK_PLUGIN ON)

# don't build plugin on systems that require dependents to be shared (PIC actually)
IF(NOT BUILD_SHARED_LIBS)
  IF(CMAKE_SYSTEM MATCHES "HP-UX.*")
    SET(BUILD_QVTK_PLUGIN OFF)
  ENDIF(CMAKE_SYSTEM MATCHES "HP-UX.*")
ENDIF(NOT BUILD_SHARED_LIBS)

######################################
# TODO : verif if QT has designer lib and headers

SET(BUILD_QVTK_PLUGIN OFF)

######################################

IF(BUILD_QVTK_PLUGIN)
  
  ADD_DEFINITIONS(-DQT_PLUGIN)

# add QVTK plugin from sources 
# stand-alone as it doesn't depend on QVTK library
  ADD_LIBRARY ( QVTKWidgetPlugin
    SHARED
    ${PluginLibSrcs}
    ${PluginMocSrcs}
  )
  IF(QT_INST_MAJOR_VERSION GREATER 3)
  	# libs for Qt4
  	TARGET_LINK_LIBRARIES( QVTKWidgetPlugin 
  	   ${QT_QTGUI_LIBRARY} 
  	   ${QT_QTCORE_LIBRARY} 
  	   ${QT_QTOPENGL_LIBRARY} 
  	   vtkRendering 
  	   vtkImaging
  	   vtkGraphics
  	   vtkFiltering
  	   vtkCommon )
  ELSE(QT_INST_MAJOR_VERSION GREATER 3)
  	# libs for Qt < 4
  	TARGET_LINK_LIBRARIES( QVTKWidgetPlugin 
  	   ${QT_QT_LIBRARY}
  	   vtkRendering
  	   vtkImaging
  	   vtkGraphics
  	   vtkFiltering
  	   vtkCommon 
	)
  ENDIF(QT_INST_MAJOR_VERSION GREATER 3)
ELSE(BUILD_QVTK_PLUGIN)
  MESSAGE(STATUS "Will not build QVTK plugin because VTK isn't build as shared libraries")
ENDIF(BUILD_QVTK_PLUGIN)


# Configure the VTKConfigQt.cmake support file.
CONFIGURE_FILE(${CMAKE_CURRENT_SOURCE_DIR}/VTKConfigQt.cmake.in
               ${VTK_BINARY_DIR}/VTKConfigQt.cmake @ONLY IMMEDIATE)


# install rules

IF(BUILD_QVTK_PLUGIN)
# install at /plugins/designer allows one to set their designer plugin path
# in the designer preferences to the vtk-install/plugins directory.
  IF(NOT VTK_INSTALL_QT_DIR)
    SET(VTK_INSTALL_QT_DIR /plugins/designer)
  ENDIF(NOT VTK_INSTALL_QT_DIR)
  IF(NOT VTK_INSTALL_NO_RUNTIME)
    INSTALL_TARGETS( ${VTK_INSTALL_QT_DIR} QVTKWidgetPlugin )
  ENDIF(NOT VTK_INSTALL_NO_RUNTIME)

  IF ( UNIX )
    ADD_CUSTOM_TARGET( install-qtplugin
                       install -m 777 -o root ${VTK_BINARY_DIR}/bin/libQVTKWidgetPlugin.so ${QTDIR}/${VTK_INSTALL_QT_DIR}
                       DEPENDS ${VTK_BINARY_DIR}/bin/libQVTKWidgetPlugin.so )
  ENDIF ( UNIX )
ENDIF(BUILD_QVTK_PLUGIN)

IF(NOT VTK_INSTALL_NO_DEVELOPMENT)
  INSTALL_FILES( ${VTK_INSTALL_INCLUDE_DIR} .h ${QVTKLibSrcs})
  INSTALL_FILES( ${VTK_INSTALL_LIB_DIR} FILES ${VTK_BINARY_DIR}/VTKConfigQt.cmake )
ENDIF(NOT VTK_INSTALL_NO_DEVELOPMENT)
IF(NOT VTK_INSTALL_NO_LIBRARIES)
  INSTALL_TARGETS( ${VTK_INSTALL_LIB_DIR} QVTK )
ENDIF(NOT VTK_INSTALL_NO_LIBRARIES)