[zypp-devel] zypp::ProgressData question
Hello all, I'm improving callback implementation in pkg-bindings, I'd like to add a total progress and the callbacks should be displayed in the main dialog (instead of popups). I'm reusing zypp::ProgressData class with zypp::CombinedProgressData class which provides a sub progress for a sub task. That's nice. But I have a problem, I can register only bool function(const zypp::ProgressData&) as the receiver function, I'd like to register bool MyClass::function(const zypp::ProgressData&) Is it possible somehow? Maybe I'm not using the classes correctly... Currently I'm using this really ugly hack (a global pointer): PkgModuleFunctions *ptr = NULL; bool source_receiver(const zypp::ProgressData &progress) { if (ptr != NULL) { return ptr->SourceLoadReceiver(progress); } return true; } bool PkgModuleFunctions::SourceLoadReceiver(const zypp::ProgressData &progress) { // handle the progress here... } YCPValue PkgModuleFunctions::SourceLoad() { ptr = this; YCPValue ret = SourceLoadImpl(source_receiver); // ^^^^^^^^^^^^^^^^^^ // here I'd like to use PkgModuleFunctions::SourceLoadReceiver return ret; } PkgModuleFunctions::SourceLoadReceiver doesn't work for this reason: Source.cc: In member function 'YCPValue PkgModuleFunctions::SourceLoad()': Source.cc:442: error: no matching function for call to 'PkgModuleFunctions::SourceLoadImpl(<unresolved overloaded function type>)' ./PkgModuleFunctions.h:180: note: candidates are: YCPValue PkgModuleFunctions::SourceLoadImpl(const boost::function<bool ()(const zypp::ProgressData&), std::allocator<void> >&) See the latest SVN version of pkg-bindings for more details... Thank you in advance -- Best Regards Ladislav Slezák Yast Developer ------------------------------------------------------------------------ SUSE LINUX, s.r.o. e-mail: lslezak@suse.cz Lihovarská 1060/12 tel: +420 284 028 960 190 00 Prague 9 fax: +420 284 028 951 Czech Republic http://www.suse.cz/ -- To unsubscribe, e-mail: zypp-devel+unsubscribe@opensuse.org For additional commands, e-mail: zypp-devel+help@opensuse.org
On Tuesday 04 December 2007 05:54:04 pm Ladislav Slezak wrote:
Hello all,
I'm improving callback implementation in pkg-bindings, I'd like to add a total progress and the callbacks should be displayed in the main dialog (instead of popups).
I'm reusing zypp::ProgressData class with zypp::CombinedProgressData class which provides a sub progress for a sub task. That's nice.
But I have a problem, I can register only bool function(const zypp::ProgressData&) as the receiver function, I'd like to register bool MyClass::function(const zypp::ProgressData&)
Hi Ladislav Well, you can't register a function of a class because if the function is not static, you actually need an instance of the class. The solution for this is to use boost::bind, which we use a lot in ZYpp. If you look at the YUM parser code, which uses callbacks a lot for data consuming, you can use boost bind to get a functor object using it like this: bind(&RepoParser::Impl::repomd_CB, this, _1, _2)); That means, use the repomd_CB function of that class, on the this object, and then the parameters order (you can even invert or ignore parameters when binding), the result of that expression is a functor you can use in place of any functor, so you can set the ProgressData progress callback to the result of a bind expression. Don't hesitate to ask again in doubt! boost is tricky, Duncan -- To unsubscribe, e-mail: zypp-devel+unsubscribe@opensuse.org For additional commands, e-mail: zypp-devel+help@opensuse.org
participants (2)
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Duncan Mac-Vicar P. -
Ladislav Slezak