深入理解c++实现Qt信号和槽机制

connect(sender, SIGNAL(signal), receiver, SLOT(slot));

disconnect(sender, SIGNAL(signal), receiver, SLOT(slot));

#include <iostream>
#include <vector>
using namespace std;
//槽函数类
template <class TParam>
class SlotBase
{
public:
    virtual void slotFuntion(TParam) = 0;
    virtual ~SlotBase() = default;
};
template <class TReceiver,class TParam>
class Slot:public SlotBase<TParam>
{
private:
    TReceiver *m_preveiver;
    void (TReceiver::*m_func)(TParam);
public:
    Slot(TReceiver * reveiver,void(TReceiver::*func)(TParam))
    {
        m_preveiver = reveiver;
        m_func = func;
    }
    void slotFuntion(TParam param) override
    {
        (m_preveiver->*m_func)(param);
    }
};
//信号类
template <class TParam>
class Signal
{
private:
    std::vector<SlotBase<TParam> *> signal_vector;
public:
    template <class TReceiver>
    void addSlot(TReceiver *reveiver,void(TReceiver::*func)(TParam))
    {
        signal_vector.push_back(new Slot(reveiver,func));
    }
    void operator()(TParam param)
    {
        for(SlotBase<TParam> *p:signal_vector)
        {
            p->slotFuntion(param);
        }
    }
};
//两个测试的接受信号类
class Receiver1
{
public:
    void func1(int param)
    {
        std::cout<<"这是Receiver1类中方法,参数为"<<param<<endl;
    }
};
class Receiver2
{
public:
    void func2(int param)
    {
        std::cout<<"这是Receiver2类中方法,参数为"<<param<<endl;
    }
};
class SendObj
{
public:
    Signal<int> valueChanged;
public:
    void testSend(int value)
    {
        valueChanged(value);
    }
};
#define connect(send,signal,reveiver,slot) send->signal.addSlot(reveiver,slot)
int main()
{
    SendObj *send=new SendObj;
    Receiver1 *r1 = new Receiver1;
    Receiver2 *r2 = new Receiver2;
    connect(send,valueChanged,r1,&Receiver1::func1);
    connect(send,valueChanged,r2,&Receiver2::func2);
    send->testSend(100);
    return 0;
}