AHM2012-Slicer-Extension

Writing an s4ext file

• Extensions are described using a simple text file.

#
# First token of each non-comment line is the keyword and the rest of the line
# (including spaces) is the value.
# - the value can be blank
#

# This is source code manager (i.e. svn)
scm local
scmurl Testing/LoadableExtensionTemplate

# list dependencies
# - These should be names of other modules that have .s4ext files
# - The dependencies will be built first
depends NA

# homepage
homepage    http://www.slicer.org/slicerWiki/index.php/Slicer4:Developers:Projects:QtSlicer/Tutorials/ExtensionWriting

# Match category in the xml description of the module (where it shows up in Modules menu)
category    Examples

# Give people an idea what to expect from this code
#  - Is it just a test or something you stand beind?
status      Beta

# One line stating what the module does
description This is an example of Qt loadable module built as an extension

• This file will be automatically generated using information specified within your CMakeLists.txt

Example of CMakeLists.txt

[...]
set(EXTENSION_NAME LoadableExtensionTemplate)

#-----------------------------------------------------------------------------
# Prerequisites
#-----------------------------------------------------------------------------
if(NOT Slicer_SOURCE_DIR)
  set(EXTENSION_HOMEPAGE "http://www.slicer.org/slicerWiki/index.php/Slicer4:Developers:Projects:QtSlicer/Tutorials/ExtensionWriting")
  set(EXTENSION_CATEGORY "Examples")
  set(EXTENSION_STATUS "Beta")
  set(EXTENSION_DESCRIPTION "This is an example of Qt loadable module built as an extension")
  set(EXTENSION_DEPENDS CLIExtensionTemplate) # Specified as a space separated list or 'NA' if any

  find_package(Slicer REQUIRED)

  # Additional C/CXX flags - Should be defined before including Slicer_USE_FILE
  set(ADDITIONAL_C_FLAGS "" CACHE STRING "Additional ${EXTENSION_NAME} C Flags")
  set(ADDITIONAL_CXX_FLAGS "" CACHE STRING "Additional ${EXTENSION_NAME} CXX Flags")

  include(${Slicer_USE_FILE})

  set(EXTENSION_LICENSE_FILE ${Slicer_LICENSE_FILE})
  set(EXTENSION_README_FILE ${Slicer_README_FILE})

  include(SlicerEnableExtensionTesting)

endif()


# Add subdirectories
add_subdirectory(Logic)

#-----------------------------------------------------------------------------
# Sources
#-----------------------------------------------------------------------------
set(qt_module_export_directive "Q_SLICER_QTMODULES_LOADABLEEXTENSIONTEMPLATE_EXPORT")

# Additional includes - Current_{source,binary} and Slicer_{Libs,Base} already included
set(qt_module_include_directories
  ${CMAKE_CURRENT_SOURCE_DIR}/Logic
  ${CMAKE_CURRENT_BINARY_DIR}/Logic
  )

# Source files
set(qt_module_SRCS
  qSlicerLoadableExtensionTemplateModule.cxx
  qSlicerLoadableExtensionTemplateModule.h
  qSlicerLoadableExtensionTemplateModuleWidget.cxx
  qSlicerLoadableExtensionTemplateModuleWidget.h
  )

# Headers that should run through moc
set(qt_module_MOC_SRCS
  qSlicerLoadableExtensionTemplateModule.h
  qSlicerLoadableExtensionTemplateModuleWidget.h
  )

# UI files
set(qt_module_UI_SRCS
  Resources/UI/qSlicerLoadableExtensionTemplateModule.ui
)

# Additional Target libraries
set(qt_module_target_libraries
  vtkSlicerLoadableExtensionTemplateModuleLogic
  )

# Resources
set(qt_module_resources
  Resources/qSlicerLoadableExtensionTemplateModule.qrc
)

#-----------------------------------------------------------------------------
# Build
#-----------------------------------------------------------------------------
slicerMacroBuildQtModule(
  NAME ${EXTENSION_NAME}
  EXPORT_DIRECTIVE ${qt_module_export_directive}
  INCLUDE_DIRECTORIES ${qt_module_include_directories}
  SRCS ${qt_module_SRCS}
  MOC_SRCS ${qt_module_MOC_SRCS}
  UI_SRCS ${qt_module_UI_SRCS}
  TARGET_LIBRARIES ${qt_module_target_libraries}
  RESOURCES ${qt_module_resources}
  )

#-----------------------------------------------------------------------------
# Testing
#-----------------------------------------------------------------------------
if(BUILD_TESTING)
  add_subdirectory(Testing)
endif()

#-----------------------------------------------------------------------------
# Generate extension description file '<EXTENSION_NAME>.s4ext'
#-----------------------------------------------------------------------------
if(NOT Slicer_SOURCE_DIR)
  include(SlicerFunctionGenerateExtensionDescription)
  slicerFunctionGenerateExtensionDescription(
    EXTENSION_NAME ${EXTENSION_NAME}
    EXTENSION_CATEGORY ${EXTENSION_CATEGORY}
    EXTENSION_STATUS ${EXTENSION_STATUS}
    EXTENSION_HOMEPAGE ${EXTENSION_HOMEPAGE}
    EXTENSION_DESCRIPTION ${EXTENSION_DESCRIPTION}
    EXTENSION_DEPENDS ${EXTENSION_DEPENDS}
    DESTINATION_DIR ${CMAKE_CURRENT_BINARY_DIR}
    SLICER_WC_REVISION ${Slicer_WC_REVISION}
    SLICER_WC_ROOT ${Slicer_WC_ROOT}
    )
endif()

#-----------------------------------------------------------------------------
# Packaging
#-----------------------------------------------------------------------------
if(NOT Slicer_SOURCE_DIR)
  include(${Slicer_EXTENSION_CPACK})
endif()

Testing your extension

• Since extension contains one or more modules, writing test shouldn't be different.

How users will access your extension

• Two options:
  • Extension manager within Slicer
  • Download from http://slicer.kitware.com/midas3/slicerpackages