一个简单的基于Qt的MVC框架

如下是一个简单的基于Qt的MVC框架示例，其中模型（Model）中的操作会在子线程中处理。这个示例将包括一个基本的视图（View）、控制器（Controller）和模型（Model）。

1. 项目结构

项目结构如下：

MyMVCApp/
├── main.cpp
├── model.h
├── model.cpp
├── view.h
├── view.cpp
├── controller.h
├── controller.cpp
├── mainwindow.ui
├── mainwindow.h
├── mainwindow.cpp

2. main.cpp

#include <QApplication>
#include "mainwindow.h"int main(int argc, char *argv[])
{QApplication a(argc, argv);MainWindow w;w.show();return a.exec();
}

3. view.h

视图部分主要负责显示数据和用户交互。我们将使用一个简单的QMainWindow作为视图，其中包含一个按钮和一个标签。

#ifndef VIEW_H
#define VIEW_H#include <QWidget>
#include <QPushButton>
#include <QLabel>
#include <QVBoxLayout>class View : public QWidget
{Q_OBJECTpublic:explicit View(QWidget *parent = nullptr);QPushButton *getButton() const;QLabel *getLabel() const;private:QPushButton *button;QLabel *label;QVBoxLayout *layout;
};#endif // VIEW_H

4. view.cpp

#include "view.h"View::View(QWidget *parent) : QWidget(parent)
{button = new QPushButton("Click me", this);label = new QLabel("Initial text", this);layout = new QVBoxLayout(this);layout->addWidget(button);layout->addWidget(label);setLayout(layout);
}QPushButton* View::getButton() const
{return button;
}QLabel* View::getLabel() const
{return label;
}

5. mainwindow.h

在mainwindow.h中，我们将包含view.h并将其作为主窗口的一部分。

#ifndef MAINWINDOW_H
#define MAINWINDOW_H#include <QMainWindow>
#include "controller.h"
#include "view.h"namespace Ui {
class MainWindow;
}class MainWindow : public QMainWindow
{Q_OBJECTpublic:explicit MainWindow(QWidget *parent = nullptr);~MainWindow();private:Ui::MainWindow *ui;Controller *controller;View *view;
};#endif // MAINWINDOW_H

6. mainwindow.cpp

在mainwindow.cpp中，我们将初始化视图并连接控制器和视图的信号和槽。

#include "mainwindow.h"
#include "ui_mainwindow.h"MainWindow::MainWindow(QWidget *parent) :QMainWindow(parent),ui(new Ui::MainWindow),controller(new Controller(this)),view(new View(this))
{ui->setupUi(this);setCentralWidget(view);// Connect button click to controller slotconnect(view->getButton(), &QPushButton::clicked, controller, &Controller::handleButtonClicked);// Connect controller signal to update labelconnect(controller, &Controller::updateLabel, view->getLabel(), &QLabel::setText);
}MainWindow::~MainWindow()
{delete ui;
}

7. controller.h

#ifndef CONTROLLER_H
#define CONTROLLER_H#include <QObject>
#include "model.h"class Controller : public QObject
{Q_OBJECTpublic:explicit Controller(QObject *parent = nullptr);signals:void updateLabel(const QString &text);public slots:void handleButtonClicked();private:Model *model;
};#endif // CONTROLLER_H

8. controller.cpp

#include "controller.h"Controller::Controller(QObject *parent) : QObject(parent), model(new Model(this))
{// Connect model signal to controller signalconnect(model, &Model::dataProcessed, this, &Controller::updateLabel);
}void Controller::handleButtonClicked()
{model->processData();
}

9. model.h

#ifndef MODEL_H
#define MODEL_H#include <QObject>
#include <QThread>class Model : public QObject
{Q_OBJECTpublic:explicit Model(QObject *parent = nullptr);~Model();void processData();signals:void dataProcessed(const QString &result);private:QThread workerThread;
};#endif // MODEL_H

10. model.cpp

#include "model.h"
#include <QTimer>class Worker : public QObject
{Q_OBJECTpublic slots:void doWork(){// Simulate long-running taskQThread::sleep(2);emit resultReady("Data processed in background thread");}signals:void resultReady(const QString &result);
};Model::Model(QObject *parent) : QObject(parent)
{Worker *worker = new Worker;worker->moveToThread(&workerThread);connect(&workerThread, &QThread::finished, worker, &QObject::deleteLater);connect(this, &Model::operate, worker, &Worker::doWork);connect(worker, &Worker::resultReady, this, &Model::dataProcessed);workerThread.start();
}Model::~Model()
{workerThread.quit();workerThread.wait();
}void Model::processData()
{emit operate();
}

11. Worker类

在model.cpp中定义一个Worker类，用于在子线程中执行任务。

class Worker : public QObject
{Q_OBJECTpublic slots:void doWork(){// Simulate long-running taskQThread::sleep(2);emit resultReady("Data processed in background thread");}signals:void resultReady(const QString &result);
};