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From: <rom...@us...> - 2006-07-17 08:10:59
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Revision: 306 Author: roman_yakovenko Date: 2006-07-17 01:10:52 -0700 (Mon, 17 Jul 2006) ViewCVS: http://svn.sourceforge.net/pygccxml/?rev=306&view=rev Log Message: ----------- adding FAQs documentation to py++ Modified Paths: -------------- pyplusplus_dev/docs/faqs/faqs.rest Modified: pyplusplus_dev/docs/faqs/faqs.rest =================================================================== --- pyplusplus_dev/docs/faqs/faqs.rest 2006-07-13 08:27:50 UTC (rev 305) +++ pyplusplus_dev/docs/faqs/faqs.rest 2006-07-17 08:10:52 UTC (rev 306) @@ -59,6 +59,62 @@ That's all. +------------------------------------------------------- +How to expose function, which has hand-written wrapper? +------------------------------------------------------- +:: + + struct window_t{ + ... + void get_size( int& height, int& widht ) const; + ... + }; + +You can not expose ``get_size`` function as is - ``int`` is immutable type in +Python. So, we need to create a wrapper to the function: +:: + + boost::python::tuple get_size_wrapper( const window_t& win ){ + int height(0), width( 0 ); + win.get_size( height, widht ); + return boost::python::make_tuple( height, width ); + } + +:: + + class_<window_t>( ... ) + .def( "get_size", &get_size_wrapper ) + ... + ; + +Now, after you know how this problem is solved. I will show how this solution +could be integrated with `pyplusplus`_. + + +:: + + wrapper_code = """ + static boost::python::tuple get_size( const window_t& win ){ + int height(0), width( 0 ); + win.get_size( height, widht ); + return boost::python::make_tuple( height, width ); + } + """ + +:: + + registration_code = 'def( "get_size", &%s::get_size )' % window.wrapper_alias + +:: + + mb = module_builder_t( ... ) + window = mb.class_( "window_t" ) + window.member_function( "get_size" ).exclude() + window.add_wrapper_code( wrapper_code ) + window.add_code( registration_code ) + +That's all. + .. _`pyplusplus` : ./../pyplusplus.html .. _`boost.python`: http://www.boost.org/libs/python/doc/index.html .. _`Python`: http://www.python.org This was sent by the SourceForge.net collaborative development platform, the world's largest Open Source development site. |
