当前位置：首页 > news >正文

基于QT的C++中小项目软件开发架构源码

news 2024/9/23 18:50:20

描述

基于QT信号槽机制实现类之间的交互调用通信，适用于使用不同枚举作为消息交互的类型场景，支持附带任意参数，代码使用方式参考前一篇文章

特性

仅需包含一个头文件Communicator.h，需要通信的业务类继承Communicator，界面类继承VCommunicator或MVCommunicator。
消息通过枚举类型定义，支持任意枚举消息，添加枚举无需改动代码。枚举名称区分消息类型，枚举值区分具体消息
使用便捷，只需注册消息和消息处理函数
提供发送消息时，附带any传递任意额外信息
支持多线程，同QT一致的信号槽触发方式，如需控制信号槽触发方式，需要额外补充代码

对比QT信号槽

适用于使用不同枚举作为消息类型场景，支持附带任意参数
使用同QT一样便捷，只需注册消息和消息回调函数。且如果使用QT的信号槽进行通信，不同的消息的类型则需要定义多个connect连接函数，如ELoginMsg、ERunMsg，多一种消息就要多一个connect

Communicator.h

#pragma once
#include <QMainWindow>
#include <functional>
#include <unordered_map>
#if __cplusplus >= 201703L
#include <any>
#else 
#include <typeinfo>
#include <memory>
namespace std {
class any
{class AnyHelperBase{public:virtual const std::type_info& type()const = 0;virtual AnyHelperBase* clone()const = 0;};template<typename T>class AnyHelper :public AnyHelperBase{public:T data;template<typename ...Args>AnyHelper(Args&&... args) :data(std::forward<Args>(args)...) {}AnyHelper(const AnyHelper& rhs) :data(rhs.data) {}AnyHelper(const T& value) :data(value) {}virtual const std::type_info& type() const{return typeid(T);}virtual AnyHelper* clone() const{return new AnyHelper(*this);}};template<typename T>friend T any_cast(const any& a);
private:std::unique_ptr<AnyHelperBase> pdata{};
public:any() :pdata(nullptr) {}template<typename T>any(T&& value) : pdata(new AnyHelper<std::decay_t<T>>(value)) {}any(const any& rhs) {if (rhs.pdata != nullptr) {pdata.reset(rhs.pdata->clone());}}any(any& rhs) {if (rhs.pdata != nullptr) {pdata.reset(rhs.pdata->clone());}}any(any&& rhs) :pdata(rhs.pdata.release()) {}const std::type_info& type() const{return pdata->type();}bool has_value() const {return pdata != nullptr;}void reset() {pdata.reset();}template<typename T>any& operator=(T value) {pdata.reset(new AnyHelper<std::decay_t<T>>(value));return *this;}any& operator=(any rhs){pdata.reset(rhs.pdata->clone());return *this;}
};template<typename T>
T any_cast(const any& a)
{auto p = dynamic_cast<any::AnyHelper<std::decay_t<T>>*>(a.pdata.get());if (p == nullptr)throw std::runtime_error("Bad any cast!");return p->data;
}
}
#endifclass MsgHandler {
public:using MsgID = size_t;using MsgHandleFunc = std::function<void(std::any)>;using MsgHandleFuncNoPara = std::function<void()>;template<typename T, typename = std::enable_if_t<std::is_enum<T>::value, void>>void HandleMsg(T msg, std::any info = std::any{}) {m_msgHandlers[HashID(msg)](info);}
protected:template<typename T, typename = std::enable_if_t<std::is_enum<T>::value, void>>MsgID HashID(T msg) {return std::hash<std::string>()(typeid(T).name()) ^ std::hash<size_t>()(static_cast<size_t>(msg));}template<typename T, typename = std::enable_if_t<std::is_enum<T>::value, void>>void RegisterMsgHandler(T msg, MsgHandleFuncNoPara func) {m_msgHandlers.insert({ HashID(msg),[=](std::any) {func(); } });}template<typename T, typename = std::enable_if_t<std::is_enum<T>::value, void>>void RegisterMsgHandler(T msg, MsgHandleFunc func) {m_msgHandlers.insert({ HashID(msg), func });}template<typename T, typename = std::enable_if_t<std::is_enum<T>::value, void>>void RemoveMsgHandler(T msg) {if (auto findit = m_msgHandlers.find(msg); findit != m_msgHandlers.end()) {m_msgHandlers.erase(findit);}}
protected:std::unordered_map<MsgID, MsgHandleFunc> m_msgHandlers;
};class Communicator : public QObject, public MsgHandler {Q_OBJECT
public:Communicator(QObject* parent = nullptr) : QObject(parent) {qRegisterMetaType<MsgID>("MsgID");qRegisterMetaType<std::any>("std::any");}
signals:void SendMsg(MsgID, std::any);
public:void HandleHashMsg(MsgID msgID, std::any info = std::any{}) {if (bool findHandler = m_msgHandlers.find(msgID) != m_msgHandlers.end()) {m_msgHandlers[msgID](info);}}
public:template<typename Communicator1>void Connect(Communicator1* receiver) {connect(this, &Communicator::SendMsg, receiver, &Communicator1::HandleHashMsg);}template<typename Communicator1>void Disconnect(Communicator1* receiver) {disconnect(this, &Communicator::SendMsg, receiver, &Communicator1::HandleHashMsg);}template<typename T, typename = std::enable_if_t<std::is_enum<T>::value, void>>void Emit(T msg, std::any info = nullptr) {emit SendMsg(HashID(msg), info);}
};class ViewCommunicator : public QWidget, public MsgHandler {Q_OBJECT
public:ViewCommunicator(QWidget* parent = nullptr) : QWidget(parent) {qRegisterMetaType<MsgID>("MsgID");qRegisterMetaType<std::any>("std::any");}
signals:void SendMsg(MsgID, std::any);
public:void HandleHashMsg(MsgID msgID, std::any info = std::any{}) {if (bool findHandler = m_msgHandlers.find(msgID) != m_msgHandlers.end()) {m_msgHandlers[msgID](info);}}
public:template<typename Communicator1>void Connect(Communicator1* receiver) {connect(this, &ViewCommunicator::SendMsg, receiver, &Communicator1::HandleHashMsg);}template<typename Communicator1>void Disconnect(Communicator1* receiver) {disconnect(this, &ViewCommunicator::SendMsg, receiver, &Communicator1::HandleHashMsg);}
protected:template<typename T, typename = std::enable_if_t<std::is_enum<T>::value, void>>void Emit(T msg, std::any info = nullptr) {emit SendMsg(HashID(msg), info);}
};class MViewCommunicator : public QMainWindow, public MsgHandler {Q_OBJECT
public:MViewCommunicator(QWidget* parent = nullptr) :QMainWindow(parent) {qRegisterMetaType<MsgID>("MsgID");qRegisterMetaType<std::any>("std::any");}
signals:void SendMsg(MsgID, std::any);
public:void HandleHashMsg(MsgID msgID, std::any info = std::any{}) {if (bool findHandler = m_msgHandlers.find(msgID) != m_msgHandlers.end()) {m_msgHandlers[msgID](info);}}
public:template<typename Communicator1>void Connect(Communicator1* receiver) {connect(this, &MViewCommunicator::SendMsg, receiver, &Communicator1::HandleHashMsg);}template<typename Communicator1>void Disconnect(Communicator1* receiver) {disconnect(this, &MViewCommunicator::SendMsg, receiver, &Communicator1::HandleHashMsg);}
protected:template<typename T, typename = std::enable_if_t<std::is_enum<T>::value, void>>void Emit(T msg, std::any info = std::any{}) {emit SendMsg(HashID(msg), info);}
};namespace InterConnection {
template<typename Communicator1, typename Communicator2>
void Connect(Communicator1* c1, Communicator2* c2)
{c1->Connect(c2);c2->Connect(c1);
}template<typename Communicator1, typename Communicator2>
void Disconnect(Communicator1* c1, Communicator2* c2)
{c1->Disconnect(c2);c2->Disconnect(c1);
}
}