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Diffstat (limited to 'plugingui/notifier.h')
| -rw-r--r-- | plugingui/notifier.h | 163 |
1 files changed, 0 insertions, 163 deletions
diff --git a/plugingui/notifier.h b/plugingui/notifier.h deleted file mode 100644 index 9e9f6eb..0000000 --- a/plugingui/notifier.h +++ /dev/null @@ -1,163 +0,0 @@ -/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */ -/*************************************************************************** - * notifier.h - * - * Thu Sep 3 15:48:39 CEST 2015 - * Copyright 2015 Bent Bisballe Nyeng - * deva@aasimon.org - ****************************************************************************/ - -/* - * This file is part of DrumGizmo. - * - * DrumGizmo is free software; you can redistribute it and/or modify - * it under the terms of the GNU Lesser General Public License as published by - * the Free Software Foundation; either version 3 of the License, or - * (at your option) any later version. - * - * DrumGizmo is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU Lesser General Public License for more details. - * - * You should have received a copy of the GNU Lesser General Public License - * along with DrumGizmo; if not, write to the Free Software - * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA. - */ -#pragma once - -#include <functional> -#include <vector> -#include <map> -#include <set> -#include <memory> - -namespace aux -{ - template<int> - struct placeholder - { - }; -} - -namespace std -{ - template<int N> - struct is_placeholder<aux::placeholder<N>> - : integral_constant<int, N+1> - { - }; -} - -namespace aux -{ - // std::integer_sequence introduced in C++14 so remove this once we start requiring that. - - template<int... Ns> - struct int_sequence - { - }; - - template<int N, int... Ns> - struct gen_int_sequence - : gen_int_sequence<N-1, N-1, Ns...> - { - }; - - template<int... Ns> - struct gen_int_sequence<0, Ns...> - : int_sequence<Ns...> - { - }; -}; - - -namespace GUI { - -class Listener; -class NotifierBase { -public: - virtual void disconnect(Listener* object) {} -}; - -class Listener { -public: - virtual ~Listener() - { - for(auto signal : signals) - { - signal->disconnect(this); - } - } - - void registerNotifier(NotifierBase* signal) - { - signals.insert(signal); - } - - void unregisterNotifier(NotifierBase* signal) - { - signals.erase(signal); - } - -private: - std::set<NotifierBase*> signals; -}; - -template<typename... Args> -class Notifier : public NotifierBase { -public: - Notifier() {} - - //! \brief When dtor is called it will automatically disconnect all its listeners. - ~Notifier() - { - for(auto& slot : slots) - { - slot.first->unregisterNotifier(this); - } - } - - using callback_type = std::function<void(Args...)>; - - //! \brief Connect object to this Notifier. - template<typename O, typename F> - void connect(O* p, const F& fn) - { - slots[p] = std::move(construct_mem_fn(fn, p, aux::gen_int_sequence<sizeof...(Args)>{})); - if(p && dynamic_cast<Listener*>(p)) - { - dynamic_cast<Listener*>(p)->registerNotifier(this); - } - } - - //! \brief Disconnect object from this Notifier. - void disconnect(Listener* object) - { - slots.erase(object); - } - - //! \brief Activate this notifier by pretending it is a function. - //! Example: Notifier<int> foo; foo(42); - void operator()(Args... args) - { - for(auto& slot : slots) - { - slot.second(args...); - } - } - -private: - std::map<Listener*, callback_type> slots; - - template<typename F, typename O, int... Ns> - callback_type construct_mem_fn(const F& fn, O* p, aux::int_sequence<Ns...>) const - { - return std::bind(fn, p, aux::placeholder<Ns>{}...); - } - -}; - -} // GUI:: - -#define CONNECT(SRC, SIG, TAR, SLO) (SRC)->SIG.connect(TAR, SLO) |