zypp/zyppng/base/signals.h

   1 /*---------------------------------------------------------------------\
   2 |                          ____ _   __ __ ___                          |
   3 |                         |__  / \ / / . \ . \                         |
   4 |                           / / \ V /|  _/  _/                         |
   5 |                          / /__ | | | | | |                           |
   6 |                         /_____||_| |_| |_|                           |
   7 |                                                                      |
   8 \----------------------------------------------------------------------/
   9 *
  10 * This file contains private API, this might break at any time between releases.
  11 * You have been warned!
  12 *
  13 */
  14 #ifndef ZYPP_NG_BASE_SIGNALS_H_INCLUDED
  15 #define ZYPP_NG_BASE_SIGNALS_H_INCLUDED
  16
  17 #include <sigc++/trackable.h>
  18 #include <sigc++/signal.h>
  19 #include <sigc++/connection.h>
  20
  21 namespace zyppng {
  22
  23 using sigc::signal;
  24 using sigc::connection;
  25 using sigc::trackable;
  26
  27 template <class R, class... T>
  28 class SignalProxy;
  29
  30 /**
  31      * Hides the signals emit function from external code.
  32      *
  33      * \note based on Glibmms SignalProxy code
  34      */
  35 template <class R, class... T>
  36 class SignalProxy<R(T...)>
  37 {
  38 public:
  39   using SlotType = sigc::slot<R(T...)>;
  40   using SignalType = sigc::signal<R(T...)>;
  41
  42   SignalProxy ( SignalType &sig ) : _sig ( sig ) {}
  43
  44   /** Connects a signal handler to a signal.
  45          *
  46          * For instance, connect(sigc::mem_fun(*this, &TheClass::on_something));
  47          *
  48          * @param slot The signal handler, usually created with sigc::mem_fun() or sigc::ptr_fun().
  49          * @return A sigc::connection.
  50          */
  51   connection connect( const SlotType& slot )
  52   {
  53     return _sig.connect( slot );
  54   }
  55
  56   /** Connects a signal handler to a signal.
  57          * @see connect(const SlotType& slot).
  58          */
  59   connection connect( SlotType&& slot )
  60   {
  61     return _sig.connect( std::move( slot ) );
  62   }
  63
  64 private:
  65   SignalType &_sig;
  66 };
  67
  68
  69 }
  70
  71 #endif // ZYPP_NG_CORE_SIGNALS_H_INCLUDED