/usr/include/ClanLib-1.0/ClanLib/Signals/signal_v1.h is in libclanlib-dev 1.0~svn3827-3build1.
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** ClanLib SDK
** Copyright (c) 1997-2005 The ClanLib Team
**
** This software is provided 'as-is', without any express or implied
** warranty. In no event will the authors be held liable for any damages
** arising from the use of this software.
**
** Permission is granted to anyone to use this software for any purpose,
** including commercial applications, and to alter it and redistribute it
** freely, subject to the following restrictions:
**
** 1. The origin of this software must not be misrepresented; you must not
** claim that you wrote the original software. If you use this software
** in a product, an acknowledgment in the product documentation would be
** appreciated but is not required.
** 2. Altered source versions must be plainly marked as such, and must not be
** misrepresented as being the original software.
** 3. This notice may not be removed or altered from any source distribution.
**
** Note: Some of the libraries ClanLib may link to may have additional
** requirements or restrictions.
**
** File Author(s):
**
** Magnus Norddahl
** (if your name is missing here, please add it)
*/
//! clanSignal="System"
//! header=signals.h
#ifndef header_signal_v1
#define header_signal_v1
#if _MSC_VER > 1000
#pragma once
#endif
#ifdef _MSC_VER
#pragma warning ( disable : 4786 )
#pragma warning ( disable : 4355 ) // warning C4355: 'this' : used in base member initializer list
#endif
#include "signal.h"
#include "slot.h"
#include "slot_v1.h"
#include <list>
#include <algorithm>
//: CL Signal V1 class
//- !group=Signal/System!
//- !header=signals.h!
template <class PARAM1>
class CL_Signal_v1 : public CL_Signal
{
public:
typedef CL_Slot_v1<PARAM1> *Slot;
typedef typename std::list<Slot>::iterator SlotIterator;
class CL_Signal_v1_Generic
{
public:
CL_Signal_v1_Generic(CL_Signal_v1 *owner) : in_call(false), deleted(false), in_call_remove_slots(0), owner(owner) { return; }
~CL_Signal_v1_Generic()
{
for (SlotIterator slot_it = slots.begin(); slot_it != slots.end(); slot_it++)
{
Slot slot = *slot_it;
slot->release_signal_ref(owner);
}
}
bool in_call, deleted;
std::list<SlotIterator> *in_call_remove_slots;
std::list<Slot> slots;
CL_Signal_v1 *owner;
};
//! Construction:
public:
//: CL Signal V1 constructor
CL_Signal_v1() : impl(new CL_Signal_v1_Generic(this))
{
}
CL_Signal_v1(const CL_Signal_v1 ©) : CL_Signal(copy), impl(new CL_Signal_v1_Generic(this))
{
impl->slots = copy.impl->slots;
for (SlotIterator slot_it = impl->slots.begin(); slot_it != impl->slots.end(); slot_it++)
{
Slot slot = *slot_it;
slot->add_signal_ref(this);
}
}
//: CL Signal V1 destructor
~CL_Signal_v1()
{
if (impl->in_call) impl->deleted = true;
else delete impl;
}
//! Attributes:
public:
bool has_slots_connected() const
{
return !impl->slots.empty();
}
//! Operations:
public:
CL_Signal_v1 &operator =(const CL_Signal_v1 ©)
{
if (impl->in_call) impl->deleted = true;
else delete impl;
impl = new CL_Signal_v1_Generic(this);
impl->slots = copy.impl->slots;
for (SlotIterator slot_it = impl->slots.begin(); slot_it != impl->slots.end(); slot_it++)
{
Slot slot = *slot_it;
slot->add_signal_ref(this);
}
return *this;
}
//: Operator
void operator() (PARAM1 param1)
{
call(param1);
}
//: Call
void call(PARAM1 param1)
{
CL_Signal_v1_Generic *data = impl;
data->in_call = true;
std::list<SlotIterator> remove_slots;
try
{
data->in_call_remove_slots = &remove_slots;
// call slots connected to signal:
for (SlotIterator slot_it = data->slots.begin(); slot_it != data->slots.end(); slot_it++)
{
Slot slot = *slot_it;
// skip slot if it has no more references left in application.
// (make it pending for removal)
if (slot->get_slot_ref() == 0 && slot->is_persistent() == false)
{
if (std::find(remove_slots.begin(), remove_slots.end(), slot_it)==remove_slots.end())
remove_slots.push_back(slot_it);
}
slot->call(param1);
if (data->deleted) break;
}
}
catch (...)
{
catch_final(data, remove_slots);
throw;
}
catch_final(data, remove_slots);
}
//: Connect slot.
CL_Slot connect(Slot slot)
{
slot->add_signal_ref(this);
impl->slots.push_back(slot);
return CL_Slot(slot);
}
//: Connect callback function slot.
CL_Slot connect(void (*callback)(PARAM1))
{
return connect(new CL_FunctionSlot_v1<PARAM1>(callback));
}
//: Connect callback function with user data slot.
template <class UserData>
CL_Slot connect(
void (*callback)(PARAM1, UserData),
UserData user_data)
{
return connect(new CL_UserDataFunctionSlot_v1<PARAM1, UserData>(callback, user_data));
}
//: Connect functor slot.
template<class Functor>
CL_Slot connect_functor(const Functor &functor)
{
return connect(new CL_FunctorSlot_v1<Functor, PARAM1>(functor));
}
//: Connect member function slot.
template <class CallbackClass>
CL_Slot connect(
CallbackClass *cb_class,
void (CallbackClass::*callback)(PARAM1))
{
return connect(new CL_MethodSlot_v1<CallbackClass, PARAM1>(cb_class, callback));
}
//: Connect member function with user data slot.
template <class CallbackClass, class UserData>
CL_Slot connect(
CallbackClass *cb_class,
void (CallbackClass::*callback)(PARAM1, UserData),
UserData user_data)
{
return connect(new CL_UserDataMethodSlot_v1<CallbackClass, PARAM1, UserData>(cb_class, callback, user_data));
}
//: Disconnect
void disconnect(CL_Slot &disconnect_slot)
{
for (SlotIterator slot_it = impl->slots.begin(); slot_it != impl->slots.end();)
{
Slot slot = *slot_it;
if (disconnect_slot.impl == slot)
{
if (impl->in_call)
{
impl->in_call_remove_slots->push_back(slot_it);
++slot_it;
}
else
{
slot->release_signal_ref(this);
slot_it = impl->slots.erase(slot_it);
}
}
else
++slot_it;
}
}
//! Implementation:
private:
void catch_final(CL_Signal_v1_Generic *data, std::list<SlotIterator> &remove_slots)
{
data->in_call_remove_slots = 0;
// remove all slots no longer connected to any CL_Slot.
typename std::list<SlotIterator>::iterator remove_it;
for (remove_it = remove_slots.begin(); remove_it != remove_slots.end(); remove_it++)
{
Slot slot = **remove_it;
slot->release_signal_ref(this);
data->slots.erase(*remove_it);
}
data->in_call = false;
if (data->deleted) delete data;
}
CL_Signal_v1_Generic *impl;
};
#endif
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