[CMake] Qt4

[Filipe Sousa]

On Thursday 21 July 2005 08:18, John Biddiscombe wrote:
> For people searching the archives, I am happy using Qt4 now, I've taken
> Filipe's snippets and created these macros in my CMakeLists file. Two
> macro's follow, then further below, the code I use when adding the
> sources to the build. I'll probably tweak the macros to create a list
> instead of doing them one at a time (but since I only have a couple of

SET(source_ext "cxx") <-- this should be global, I dislike the ".cxx" 
extension, I'm used to ".cc"

MACRO(WRAP_QT_CPP result)
  FOREACH(header ${ARGN})
    GET_FILENAME_COMPONENT(basename ${header} NAME_WE)
    SET(moc_file ${CMAKE_CURRENT_BINARY_DIR}/${basename}.moc.${source_ext})
    #SET(moc_file ${CMAKE_CURRENT_BINARY_DIR}/moc_${basename}.${source_ext})
  
     # -D flags
    GET_DIRECTORY_PROPERTY(flags DEFINITIONS)
    SEPARATE_ARGUMENTS(flags)
  
    # -I flags
    GET_DIRECTORY_PROPERTY(includes INCLUDE_DIRECTORIES)
    FOREACH(inc ${includes})
      SET(flags ${flags} ${CMAKE_INCLUDE_FLAG_CXX}${inc})
    ENDFOREACH(inc)
  
    ADD_CUSTOM_COMMAND(
      OUTPUT   ${moc_file}
      COMMAND  ${QT_MOC_EXECUTABLE}
      ARGS     ${flags} ${header} -o ${moc_file}
      DEPENDS  ${QT_MOC_EXECUTABLE} ${header}
      COMMENT  "Qt Wrap Files"
    )
    SET(${result} ${${result}} ${moc_file})
  ENDFOREACH(header)
ENDMACRO(WRAP_QT_CPP)

This should handle a list of header files

WRAP_QT_CPP(moc_sources foo.h goo.h bar.h)

now you can add ${moc_sources} to ADD_EXECUTABLE or ADD_LIBRARY

Notice that you need to pass -D and -I compiler flags to moc. Without that I 
couldn't compile examples/tools/plugandpaint and 
examples/tools/plugandpaintplugins


> files in the project so far...), and remove the extension param since
> it's always the same,
>
> Many thanks for help. I like these macros more than the old cmake qt
> wrap commands, because I know exactly what they're doing. I am having no
> trouble with cmake regenerating files when requred, when I modify the ui
> file etc, all is regenerated as expected.
>
> Note that a variable is returned from the macro with a value set. (This
> feature seems to be flakey, so any improvements/suggestions welcome)

QT_WRAP_CPP is a command and does the same.

> #-----------------------------------------------
> # Macros for generating Qt wrapped files
> #-----------------------------------------------
> MACRO(WRAP_QT_CPP moc_file header source_ext)
>   GET_FILENAME_COMPONENT(basename ${header} NAME_WE)
>   GET_FILENAME_COMPONENT(path ${header} PATH)
>   SET(${moc_file} ${path}/${basename}.moc.${source_ext})
>
>   ADD_CUSTOM_COMMAND(
>     OUTPUT   ${${moc_file}}
>     COMMAND  ${QT_MOC_EXECUTABLE}
>     ARGS     ${header} -o ${${moc_file}}
>     DEPENDS  ${QT_MOC_EXECUTABLE} ${header}
>     COMMENT  "Qt Wrap Files"
>   )
> ENDMACRO(WRAP_QT_CPP)
>
> MACRO(WRAP_QT_UI ui_header ui_file header_ext)
>   GET_FILENAME_COMPONENT(basename ${ui_file} NAME_WE)
>   SET(${ui_header}
> ${CMAKE_CURRENT_BINARY_DIR}/ui_${basename}.${header_ext})
>
>   ADD_CUSTOM_COMMAND(
>     OUTPUT  ${${ui_header}}
>     COMMAND ${QT_UIC_EXECUTABLE}
>     ARGS    ${ui_file} -o ${${ui_header}}
>     DEPENDS ${ui_file}
>   )
> ENDMACRO(WRAP_QT_UI)
>
> #-----------------------------------------------
> # Create rules for generated Qt wrapped files
> #-----------------------------------------------
> WRAP_QT_CPP(moc_mainwindow "${CMAKE_CURRENT_SOURCE_DIR}/mainwindow.h"
> "cxx") WRAP_QT_CPP(moc_glwidget
> "${CMAKE_CURRENT_SOURCE_DIR}/widgets/GlWidget.h" "cxx")
> WRAP_QT_CPP(moc_dockwbase
> "${CMAKE_CURRENT_SOURCE_DIR}/dialogs/DockWidgetBase.h" "cxx")
> WRAP_QT_UI( ui_mainwindow  "${CMAKE_CURRENT_SOURCE_DIR}/mainwindow.ui" "h")
>
> #-----------------------------------------------
> # Include the widgets & dialogs subdirs
> # Include the binary dir for Qt generated files
> #-----------------------------------------------
> INCLUDE_DIRECTORIES(${CMAKE_CURRENT_SOURCE_DIR}/widgets)
> INCLUDE_DIRECTORIES(${CMAKE_CURRENT_SOURCE_DIR}/dialogs)
> INCLUDE_DIRECTORIES(${CMAKE_CURRENT_BINARY_DIR})
>
> #-----------------------------------------------
> # Add all sources to project
> #-----------------------------------------------
> SET( molekel_SRCS
>   main.cpp
>   mainwindow.cxx
>   widgets/GlWidget.cpp
>   dialogs/DockWidgetBase.cpp
>   ${moc_mainwindow}
>   ${moc_glwidget}
>   ${moc_dockwbase}
>   ${ui_mainwindow}
> )

-- 
Filipe Sousa
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