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// Aseprite Base Library
// Copyright (c) 2001-2013 David Capello
//
// This file is released under the terms of the MIT license.
// Read LICENSE.txt for more information.
#ifndef BASE_SLOT_H_INCLUDED
#define BASE_SLOT_H_INCLUDED
#pragma once
// Slot0 - Base class for delegates of zero arguments.
template<typename R>
class Slot0
{
public:
Slot0() { }
Slot0(const Slot0& s) { (void)s; }
virtual ~Slot0() { }
virtual R operator()() = 0;
virtual Slot0* clone() const = 0;
};
// Slot0_fun - hold a F instance and use the function call operator
template<typename R, typename F>
class Slot0_fun : public Slot0<R>
{
F f;
public:
Slot0_fun(const F& f) : f(f) { }
Slot0_fun(const Slot0_fun& s) : Slot0<R>(s), f(s.f) { }
~Slot0_fun() { }
R operator()() { return f(); }
Slot0_fun* clone() const { return new Slot0_fun(*this); }
};
template<typename F>
class Slot0_fun<void, F> : public Slot0<void>
{
F f;
public:
Slot0_fun(const F& f) : f(f) { }
Slot0_fun(const Slot0_fun& s) : Slot0<void>(s), f(s.f) { }
~Slot0_fun() { }
void operator()() { f(); }
Slot0_fun* clone() const { return new Slot0_fun(*this); }
};
// Slot0_mem - pointer to a member function of the T class
template<typename R, class T>
class Slot0_mem : public Slot0<R>
{
R (T::*m)();
T* t;
public:
Slot0_mem(R (T::*m)(), T* t) : m(m), t(t) { }
Slot0_mem(const Slot0_mem& s) : Slot0<R>(s), m(s.m), t(s.t) { }
~Slot0_mem() { }
R operator()() { return (t->*m)(); }
Slot0_mem* clone() const { return new Slot0_mem(*this); }
};
template<class T>
class Slot0_mem<void, T> : public Slot0<void>
{
void (T::*m)();
T* t;
public:
Slot0_mem(void (T::*m)(), T* t) : m(m), t(t) { }
Slot0_mem(const Slot0_mem& s) : Slot0<void>(s), m(s.m), t(s.t) { }
~Slot0_mem() { }
void operator()() { (t->*m)(); }
Slot0_mem* clone() const { return new Slot0_mem(*this); }
};
// Slot1 - Base class for delegates of one argument.
template<typename R, typename A1>
class Slot1
{
public:
Slot1() { }
Slot1(const Slot1& s) { (void)s; }
virtual ~Slot1() { }
virtual R operator()(A1 a1) = 0;
virtual Slot1* clone() const = 0;
};
// Slot1_fun - hold a F instance and use the function call operator
template<typename R, typename F, typename A1>
class Slot1_fun : public Slot1<R, A1>
{
F f;
public:
Slot1_fun(const F& f) : f(f) { }
Slot1_fun(const Slot1_fun& s) : Slot1<R, A1>(s), f(s.f) { }
~Slot1_fun() { }
R operator()(A1 a1) { return f(a1); }
Slot1_fun* clone() const { return new Slot1_fun(*this); }
};
template<typename F, typename A1>
class Slot1_fun<void, F, A1> : public Slot1<void, A1>
{
F f;
public:
Slot1_fun(const F& f) : f(f) { }
Slot1_fun(const Slot1_fun& s) : Slot1<void, A1>(s), f(s.f) { }
~Slot1_fun() { }
void operator()(A1 a1) { f(a1); }
Slot1_fun* clone() const { return new Slot1_fun(*this); }
};
// Slot1_mem - pointer to a member function of the T class
template<typename R, class T, typename A1>
class Slot1_mem : public Slot1<R, A1>
{
R (T::*m)(A1);
T* t;
public:
Slot1_mem(R (T::*m)(A1), T* t) : m(m), t(t) { }
Slot1_mem(const Slot1_mem& s) : Slot1<R, A1>(s), m(s.m), t(s.t) { }
~Slot1_mem() { }
R operator()(A1 a1) { return (t->*m)(a1); }
Slot1_mem* clone() const { return new Slot1_mem(*this); }
};
template<class T, typename A1>
class Slot1_mem<void, T, A1> : public Slot1<void, A1>
{
void (T::*m)(A1);
T* t;
public:
Slot1_mem(void (T::*m)(A1), T* t) : m(m), t(t) { }
Slot1_mem(const Slot1_mem& s) : Slot1<void, A1>(s), m(s.m), t(s.t) { }
~Slot1_mem() { }
void operator()(A1 a1) { (t->*m)(a1); }
Slot1_mem* clone() const { return new Slot1_mem(*this); }
};
// Slot2 - Base class for delegates of two arguments.
template<typename R, typename A1, typename A2>
class Slot2
{
public:
Slot2() { }
Slot2(const Slot2& s) { (void)s; }
virtual ~Slot2() { }
virtual R operator()(A1 a1, A2 a2) = 0;
virtual Slot2* clone() const = 0;
};
// Slot2_fun - hold a F instance and use the function call operator
template<typename R, typename F, typename A1, typename A2>
class Slot2_fun : public Slot2<R, A1, A2>
{
F f;
public:
Slot2_fun(const F& f) : f(f) { }
Slot2_fun(const Slot2_fun& s) : Slot2<R, A1, A2>(s), f(s.f) { }
~Slot2_fun() { }
R operator()(A1 a1, A2 a2) { return f(a1, a2); }
Slot2_fun* clone() const { return new Slot2_fun(*this); }
};
template<typename F, typename A1, typename A2>
class Slot2_fun<void, F, A1, A2> : public Slot2<void, A1, A2>
{
F f;
public:
Slot2_fun(const F& f) : f(f) { }
Slot2_fun(const Slot2_fun& s) : Slot2<void, A1, A2>(s), f(s.f) { }
~Slot2_fun() { }
void operator()(A1 a1, A2 a2) { f(a1, a2); }
Slot2_fun* clone() const { return new Slot2_fun(*this); }
};
// Slot2_mem - pointer to a member function of the T class
template<typename R, class T, typename A1, typename A2>
class Slot2_mem : public Slot2<R, A1, A2>
{
R (T::*m)(A1, A2);
T* t;
public:
Slot2_mem(R (T::*m)(A1, A2), T* t) : m(m), t(t) { }
Slot2_mem(const Slot2_mem& s) : Slot2<R, A1, A2>(s), m(s.m), t(s.t) { }
~Slot2_mem() { }
R operator()(A1 a1, A2 a2) { return (t->*m)(a1, a2); }
Slot2_mem* clone() const { return new Slot2_mem(*this); }
};
template<class T, typename A1, typename A2>
class Slot2_mem<void, T, A1, A2> : public Slot2<void, A1, A2>
{
void (T::*m)(A1, A2);
T* t;
public:
Slot2_mem(void (T::*m)(A1, A2), T* t) : m(m), t(t) { }
Slot2_mem(const Slot2_mem& s) : Slot2<void, A1, A2>(s), m(s.m), t(s.t) { }
~Slot2_mem() { }
void operator()(A1 a1, A2 a2) { return (t->*m)(a1, a2); }
Slot2_mem* clone() const { return new Slot2_mem(*this); }
};
#endif
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