# we need Qt3 or Qt4
INCLUDE( ${CMAKE_ROOT}/Modules/FindQt.cmake )

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

SET ( QVTKMocHeaders
    QVTKWidget.h 
    vtkEventQtSlotConnect.h)

INCLUDE_DIRECTORIES ( ${CMAKE_CURRENT_BINARY_DIR} )


IF(DESIRED_QT_VERSION MATCHES 4)
  
  # import Qt4 build settings
  INCLUDE(${QT_USE_FILE})

  SET ( PluginLibSrcs
        Q4VTKWidgetPlugin.cxx
        QVTKWidget.cxx)

  SET ( PluginMocHeaders
        Q4VTKWidgetPlugin.h
        QVTKWidget.h)

  # CMake apparently doesn't do this automatically
  SET_SOURCE_FILES_PROPERTIES(Q4VTKWidgetPlugin.cxx PROPERTIES 
                              OBJECT_DEPENDS ${CMAKE_CURRENT_SOURCE_DIR}/QVTKWidget.xpm)

  QT4_WRAP_CPP ( QVTKLibMocSrcs ${QVTKMocHeaders} )
  QT4_WRAP_CPP ( PluginMocSrcs ${PluginMocHeaders} )

  SET(QT_LIBS "${QT_LIBRARIES}")
  
ELSE(DESIRED_QT_VERSION MATCHES 4)
  
  # Qt3 settings
  INCLUDE_DIRECTORIES ( ${QT_INCLUDE_DIR} )
  # assume Qt dll
  ADD_DEFINITIONS(-DQT_DLL)
  # check for a multithreaded Qt3 dll
  IF(QT_QT_LIBRARY MATCHES "mt")
    ADD_DEFINITIONS(-DQT_THREAD_SUPPORT)
  ENDIF(QT_QT_LIBRARY MATCHES "mt")
  
  SET ( PluginLibSrcs
        Q3VTKWidgetPlugin.cxx
        QVTKWidget.cxx)

  SET ( PluginMocHeaders
        QVTKWidget.h)

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


  QT_WRAP_CPP ( QVTK QVTKLibMocSrcs ${QVTKMocHeaders} )
  QT_WRAP_CPP ( QVTKWidgetPlugin PluginMocSrcs ${PluginMocHeaders} )
  
  SET(QT_LIBS ${QT_QT_LIBRARY} )
  
ENDIF(DESIRED_QT_VERSION MATCHES 4)

SET_SOURCE_FILES_PROPERTIES(vtkEventQtSlotConnect.cxx PROPERTIES 
                            OBJECT_DEPENDS ${CMAKE_CURRENT_BINARY_DIR}/moc_vtkEventQtSlotConnect.cxx)

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

# Apply user-defined properties to the library target.
IF(VTK_LIBRARY_PROPERTIES)
  SET_TARGET_PROPERTIES(QVTK PROPERTIES ${VTK_LIBRARY_PROPERTIES})
ENDIF(VTK_LIBRARY_PROPERTIES)

TARGET_LINK_LIBRARIES( QVTK 
  ${QT_LIBS}
  vtkRendering 
  vtkGraphics
  vtkImaging 
  vtkCommon)


# 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)


IF(BUILD_QVTK_PLUGIN)

  ADD_DEFINITIONS(-DQT_PLUGIN)
  IF(DESIRED_QT_VERSION MATCHES 4)
    # A release build of the designer must have 
    # a release build of this plugin to work properly
    # if the QtGui exists, a release build of the designer is assumed
    IF(QT_QTGUI_LIBRARY)
      ADD_DEFINITIONS(-DQT_NO_DEBUG)
    ENDIF(QT_QTGUI_LIBRARY)
  ENDIF(DESIRED_QT_VERSION MATCHES 4)
  
# add QVTK plugin from sources 
# stand-alone as it doesn't depend on QVTK library
  ADD_LIBRARY ( QVTKWidgetPlugin
    SHARED
    ${PluginLibSrcs}
    ${PluginMocSrcs}
  )

# link with release version of Qt libs
  TARGET_LINK_LIBRARIES( QVTKWidgetPlugin 
    ${QT_LIBS}
    vtkRendering
    vtkIO
    vtkImaging
    vtkGraphics
    vtkFiltering
    vtkCommon
  )
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)
  # The VTK_INSTALL_QT_PLUGIN_DIR variable sets the location
  # in which the Qt plugin will be installed.  It may or may not contain
  # variable references to CMAKE_INSTALL_PREFIX and VTK_INSTALL_QT_DIR.
  # The default is to install to VTK_INSTALL_QT_DIR under the installation
  # prefix.  The default VTK_INSTALL_QT_DIR will allow the designer plugin
  # path to be set to vtk-install-prefix/plugins to get the plugin.
  IF(NOT VTK_INSTALL_QT_DIR)
    SET(VTK_INSTALL_QT_DIR /plugins/designer)
  ENDIF(NOT VTK_INSTALL_QT_DIR)

  # If no runtime is to be installed then do not install the qt plugin.
  IF(VTK_INSTALL_NO_RUNTIME)
    SET(VTK_INSTALL_NO_QT_PLUGIN 1)
  ENDIF(VTK_INSTALL_NO_RUNTIME)

  IF(NOT VTK_INSTALL_NO_QT_PLUGIN)
    # Set default plugin install directory.
    SET(DOLLAR "$")
    IF(DEFINED VTK_INSTALL_QT_PLUGIN_DIR)
    ELSE(DEFINED VTK_INSTALL_QT_PLUGIN_DIR)
      SET(VTK_INSTALL_QT_PLUGIN_DIR "${DOLLAR}{CMAKE_INSTALL_PREFIX}${DOLLAR}{VTK_INSTALL_QT_DIR}"
        CACHE STRING "Directory in which the VTK Qt plugin is placed during installation.")
      MARK_AS_ADVANCED(VTK_INSTALL_QT_PLUGIN_DIR)
    ENDIF(DEFINED VTK_INSTALL_QT_PLUGIN_DIR)

    # Configure the plugin install script.  This is used instead of
    # INSTALL_TARGETS to allow the plugin to be installed outside the
    # main install prefix.  Attach the script as a post-install script.
    CONFIGURE_FILE(${CMAKE_CURRENT_SOURCE_DIR}/PluginInstall.cmake.in
                   ${CMAKE_CURRENT_BINARY_DIR}/PluginInstall.cmake
                   @ONLY IMMEDIATE)
    SET_TARGET_PROPERTIES(QVTK PROPERTIES POST_INSTALL_SCRIPT
      ${CMAKE_CURRENT_BINARY_DIR}/PluginInstall.cmake
      )
  ENDIF(NOT VTK_INSTALL_NO_QT_PLUGIN)
ENDIF(BUILD_QVTK_PLUGIN)

IF(NOT VTK_INSTALL_NO_DEVELOPMENT)
  INSTALL_FILES( ${VTK_INSTALL_INCLUDE_DIR} .h ${QVTKLibSrcs})
  INSTALL_FILES( ${VTK_INSTALL_PACKAGE_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)