1. [代码]SharpEvent.hpp
/*
* SharpEvent.hpp
*
* Created on: 2014-5-5
* Author: leoking
* Copyright: This file is published under BSD license.
*
Copyright (c) <2014>,
All rights reserved.
Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions are met:
* Redistributions of source code must retain the above copyright
notice, this list of conditions and the following disclaimer.
* Redistributions in binary form must reproduce the above copyright
notice, this list of conditions and the following disclaimer in the
documentation and/or other materials provided with the distribution.
* Neither the name of the nor the
names of its contributors may be used to endorse or promote products
derived from this software without specific prior written permission.
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
DISCLAIMED. IN NO EVENT SHALL BE LIABLE FOR ANY
DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef SHARPEVENT_HPP_
#define SHARPEVENT_HPP_
#include
#include
namespace SharpEvent
{
template
class CEventHandler
{
public:
typedef SenderT SenderType;
typedef EventArgsT EventArgsType;
private:
struct holder
{
virtual ~holder() {}
virtual holder* clone() const = 0;
virtual bool equals(const holder*) const = 0;
virtual void invoke(SenderType, EventArgsType) const = 0;
};
struct fholder : public holder
{
typedef void (*function)(SenderType, EventArgsType);
function func;
fholder(function f) : func(f) {}
virtual holder* clone() const { return new fholder(func); }
virtual bool equals(const holder* rhs) const {
const fholder* p = dynamic_cast(rhs);
if (p)
return func == p->func;
else
return false;
}
virtual void invoke(SenderType a0, EventArgsType a1) const { (*func)(a0, a1); }
};
template
struct mholder : public holder
{
typedef C concept_t;
typedef void (concept_t::*function)(SenderType, EventArgsType);
concept_t& obj;
function func;
mholder(concept_t* o, function f) : obj(*o), func(f) {}
virtual holder* clone() const { return new mholder(&obj, func); }
virtual bool equals(const holder* rhs) const {
const mholder* p = dynamic_cast(rhs);
if (p)
return &obj == &(p->obj) && func == p->func;
else
return false;
}
virtual void invoke(SenderType a0, EventArgsType a1) const { (obj.*func)(a0, a1); }
};
holder* h;
public:
CEventHandler() : h(0) {}
CEventHandler(void(*function)(SenderType, EventArgsType)) : h(0) {
if (function)
h = new fholder(function);
}
template
CEventHandler(Concept* object, void(Concept::*function)(SenderType, EventArgsType)) : h(0) {
if (object && function)
h = new mholder(object, function);
}
CEventHandler(const CEventHandler& rhs) : h(0) {
if (rhs.h)
h = rhs.h->clone();
}
~CEventHandler() { delete h; }
void Assign(void(*function)(SenderType, EventArgsType)) {
Clear();
if (function)
h = new fholder(function);
}
template
void Assign(Concept* object, void(Concept::*function)(SenderType, EventArgsType)) {
Clear();
if (object && function)
h = new mholder(object, function);
}
void Assign(const CEventHandler& rhs) {
if (Equals(rhs))
return;
Clear();
if (rhs.h)
h = rhs.h->clone();
}
void Clear() {
delete h;
h = 0;
}
bool Empty() const { return h == 0; }
bool Equals(const CEventHandler& rhs) const {
if (h && rhs.h)
return h->equals(rhs.h);
return false;
}
void Invoke(SenderType sender, EventArgsType e) const {
if (h)
h->invoke(sender, e);
else
throw std::runtime_error("Empty EventHandler invoked.");
}
CEventHandler& operator=(const CEventHandler& rhs) { Assign(rhs); return *this; }
bool operator==(const CEventHandler& rhs) { return Equals(rhs); }
void operator()(SenderType sender, EventArgsType e) const { Invoke(sender, e); }
};
template
class CEvent
{
public:
typedef DelegateType EventHandlerType;
typedef typename EventHandlerType::SenderType SenderType;
typedef typename EventHandlerType::EventArgsType EventArgsType;
CEvent() {}
void operator+=(EventHandlerType handler) { handlers.push_front(handler); handlers.unique(); }
void operator-=(EventHandlerType handler) { handlers.remove(handler); }
void operator()(SenderType sender, EventArgsType e) {
for (typename std::list::const_iterator it = handlers.begin();
it != handlers.end(); it++)
{
EventHandlerType handler = *it;
handler.Invoke(sender, e);
}
}
private:
std::list handlers;
private:
CEvent(const CEvent&);
void operator=(const CEvent&);
};
}
#endif /* SHARPEVENT_HPP_ */
2. [代码]SharpProperty.hpp
/*
* SharpProperty.hpp
*
* Created on: 2014-5-8
* Author: leoking
* Copyright: This file is published under BSD license.
*
Copyright (c) <2014>,
All rights reserved.
Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions are met:
* Redistributions of source code must retain the above copyright
notice, this list of conditions and the following disclaimer.
* Redistributions in binary form must reproduce the above copyright
notice, this list of conditions and the following disclaimer in the
documentation and/or other materials provided with the distribution.
* Neither the name of the nor the
names of its contributors may be used to endorse or promote products
derived from this software without specific prior written permission.
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
DISCLAIMED. IN NO EVENT SHALL BE LIABLE FOR ANY
DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef SHARPPROPERTY_HPP_
#define SHARPPROPERTY_HPP_
#include
namespace SharpProperty
{
template
class CGetter
{
public:
typedef T ValueType;
private:
struct holder
{
virtual ~holder() {}
virtual holder* clone() const = 0;
virtual bool equals(const holder*) const = 0;
virtual ValueType invoke() const = 0;
};
struct fholder : public holder
{
typedef ValueType(*function)();
function func;
fholder(function f) : func(f) {}
virtual holder* clone() const { return new fholder(func); }
virtual bool equals(const holder* rhs) const {
const fholder* p = dynamic_cast(rhs);
if (p)
return p->func == func;
else
return false;
}
virtual ValueType invoke() const { return (*func)(); }
};
template
struct mholder : public holder
{
typedef Concept concept;
typedef ValueType(concept::*function)();
concept& object;
function func;
mholder(concept* o, function f) : object(*o), func(f) {}
virtual holder* clone() const { return new mholder(&object, func); }
virtual bool equals(const holder* rhs) const {
const mholder* p = dynamic_cast(rhs);
if (p)
return &(p->object) == &object && p->func == func;
else
return false;
}
virtual ValueType invoke() const { return (object.*func)(); }
};
holder* h;
public:
CGetter(ValueType (*function)()) : h(0) {
if (function)
h = new fholder(function);
}
template
CGetter(Concept* object, ValueType(Concept::*function)()) : h(0) {
if (object && function)
h = new mholder(object, function);
}
CGetter(const CGetter& rhs) {
if (rhs.h)
h = rhs.h->clone();
}
~CGetter() { delete h; }
ValueType Invoke() const {
if (h)
return h->invoke();
else
throw std::runtime_error("Empty Getter invoked.");
}
private:
void operator=(const CGetter&);
};
template
class CSetter
{
public:
typedef T ValueType;
private:
struct holder
{
virtual ~holder() {}
virtual holder* clone() const = 0;
virtual bool equals(const holder*) const = 0;
virtual void invoke(ValueType) const = 0;
};
struct fholder : public holder
{
typedef void(*function)(ValueType);
function func;
fholder(function f) : func(f) {}
virtual holder* clone() const { return new fholder(func); }
virtual bool equals(const holder* rhs) const {
const fholder* p = dynamic_cast(rhs);
if (p)
return p->func == func;
else
return false;
}
virtual void invoke(ValueType value) const { (*func)(value); }
};
template
struct mholder : public holder
{
typedef Concept concept;
typedef void(concept::*function)(ValueType);
concept& object;
function func;
mholder(concept* o, function f) : object(*o), func(f) {}
virtual holder* clone() const { return new mholder(&object, func); }
virtual bool equals(const holder* rhs) const {
const mholder* p = dynamic_cast(rhs);
if (p)
return &(p->object) == &object && p->func == func;
else
return false;
}
virtual void invoke(ValueType value) const { (object.*func)(value); }
};
holder* h;
public:
CSetter(void (*function)(ValueType)) : h(0) {
if (function)
h = new fholder(function);
}
template
CSetter(Concept* object, void(Concept::*function)(ValueType)) : h(0) {
if (object && function)
h = new mholder(object, function);
}
CSetter(const CSetter& rhs) {
if (rhs.h)
h = rhs.h->clone();
}
~CSetter() { delete h; }
void Invoke(ValueType value) const {
if (h)
h->invoke(value);
else
throw std::runtime_error("Empty Setter invoked.");
}
private:
void operator=(const CSetter&);
};
template
class property
{
public:
typedef T ValueType;
property() : getter(0), setter(0) {}
~property() { delete getter; delete setter; }
void operator()(ValueType (*getter)(), void (*setter)(ValueType)) {
if (getter)
this->getter = new CGetter(getter);
if (setter)
this->setter = new CSetter(setter);
}
void operator()(ValueType (*getter)()) {
this->operator()(getter, 0);
}
void operator()(void (*setter)(ValueType)) {
this->operator()(0, setter);
}
template
void operator()(Concept* object, ValueType (Concept::*getter)(), void (Concept::*setter)(ValueType)) {
if (object == 0)
throw std::invalid_argument("Property initialized with null object.");
if (getter)
this->getter = new CGetter(object, getter);
if (setter)
this->setter = new CSetter(object, setter);
}
template
void operator()(Concept* object, ValueType (Concept::*getter)()) {
this->operator()(object, getter, 0);
}
template
void operator()(Concept* object, void (Concept::*setter)(ValueType)) {
this->operator()(object, 0, setter);
}
operator ValueType() {
if (getter == 0)
throw std::runtime_error("Property without getter is not readable.");
return getter->Invoke();
}
void operator=(ValueType value) {
if (setter == 0)
throw std::runtime_error("Property without setter is not assignable.");
setter->Invoke(value);
}
private:
CGetter* getter;
CSetter* setter;
property(const property&);
};
}
#endif /* SHARPPROPERTY_HPP_ */
3. [代码]Sample.cpp
#include "SharpEvent.hpp"
#include "SharpProperty.hpp"
#include
#include
class CPerson;
using SharpProperty::property;
typedef SharpEvent::CEventHandler EventHandler;
typedef SharpEvent::CEvent event;
class CPerson
{
public:
// enum:
enum SexFlag { FEMALE, MALE };
CPerson(const std::string& name, int age, SexFlag sex, double tall)
: name(name), age(age), sex(sex), tall(tall)
{
Name(this, &CPerson::getName, &CPerson::setName);
Age(this, &CPerson::getAge, &CPerson::setAge);
Sex(this, &CPerson::getSex); // Sex property can not be modified.
Tall(this, &CPerson::getTall, &CPerson::setTall);
}
// property:
property Name;
property Age;
property Sex;
property Tall;
// event:
event Growth;
private:
// field:
std::string name;
int age;
SexFlag sex;
double tall;
// getter-setter:
std::string getName() { return name; }
void setName(std::string value) { name = value; }
int getAge() { return age; }
void setAge(int value) { age = value; }
SexFlag getSex() { return sex; }
//void setSex(SexFlag value) { sex = value; }
double getTall() { return tall; }
void setTall(double value) {
tall = value;
Growth(this, tall);
}
};
void OnGrowth(CPerson* sender, double e) {
std::cout << "Person named " << (std::string)sender->Name
<< " has grown to " << e << " cm."
<< std::endl;
}
int main()
{
CPerson person("LiMing", 20, CPerson::MALE, 173.4);
person.Growth += EventHandler(&OnGrowth);
person.Tall = 174;
}
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