Qt操作Thread类

相关资料：

https://blog.csdn.net/u012635648/article/details/89504115

https://blog.csdn.net/qq_28171461/article/details/90518324

.pro

QT       += core gui
QT       += network

greaterThan(QT_MAJOR_VERSION, 4): QT += widgets

CONFIG += c++11

# The following define makes your compiler emit warnings if you use
# any Qt feature that has been marked deprecated (the exact warnings
# depend on your compiler). Please consult the documentation of the
# deprecated API in order to know how to port your code away from it.
DEFINES += QT_DEPRECATED_WARNINGS

# You can also make your code fail to compile if it uses deprecated APIs.
# In order to do so, uncomment the following line.
# You can also select to disable deprecated APIs only up to a certain version of Qt.
#DEFINES += QT_DISABLE_DEPRECATED_BEFORE=0x060000    # disables all the APIs deprecated before Qt 6.0.0

SOURCES += 
    main.cpp 
    mainwindow.cpp

HEADERS += 
    mainwindow.h

FORMS += 
    mainwindow.ui

# Default rules for deployment.
qnx: target.path = /tmp/$${TARGET}/bin
else: unix:!android: target.path = /opt/$${TARGET}/bin
!isEmpty(target.path): INSTALLS += target

main.cpp

#include "mainwindow.h"

#include <QApplication>

int main(int argc, char *argv[])
{
    QApplication a(argc, argv);
    MainWindow w;
    w.show();
    return a.exec();
}

mainwindow.h

#ifndef MAINWINDOW_H
#define MAINWINDOW_H

#include <QMainWindow>
#include <QThread>
#include <QPainter>
#include <QVBoxLayout>
#include <QPushButton>
#include <QToolTip>
#include <QDebug>
#include <QTextEdit>

QT_BEGIN_NAMESPACE
namespace Ui { class MainWindow; }
QT_END_NAMESPACE


class WorkThread : public QThread
{

public:
    WorkThread(QTextEdit *textEdit, QObject *parent = nullptr);
    ~WorkThread();
    // 结束线程
    void stop();
    void paused();
    void begin();
protected:
    bool m_stop;
    bool m_paused;
    QTextEdit *m_pTextEdit;
    void run();
};

class MainWindow : public QMainWindow
{
    Q_OBJECT

public:
    MainWindow(QWidget *parent = nullptr);
    ~MainWindow();
private slots:
    void on_pushButton_clicked();

    void on_pushButton_2_clicked();

    void on_pushButton_3_clicked();

private:
    Ui::MainWindow *ui;
    WorkThread *m_pWorkThread;
};
#endif // MAINWINDOW_H

mainwindow.cpp

#include "mainwindow.h"
#include "ui_mainwindow.h"

MainWindow::MainWindow(QWidget *parent)
    : QMainWindow(parent)
    , ui(new Ui::MainWindow)
{
    ui->setupUi(this);
    setWindowTitle(QStringLiteral("Qt操作Thread类"));

    m_pWorkThread = new WorkThread(ui->textEdit);
    m_pWorkThread->start();
}

MainWindow::~MainWindow()
{
    delete ui;

    m_pWorkThread->stop();
    m_pWorkThread->exit(0);
    delete m_pWorkThread;
}

void WorkThread::run()
{
    while(!m_stop)
    {
        if (false == m_paused)
        {
            m_pTextEdit->append(QStringLiteral("进行中..."));
        }
        sleep(2);
    }
}

WorkThread::WorkThread(QTextEdit *textEdit, QObject *parent)
    :QThread(parent)
{
    m_stop = false;
    m_paused = false;
    m_pTextEdit = textEdit;
}

WorkThread::~WorkThread()
{
    // 请求终止
    requestInterruption();
    quit();
    wait();
}

void WorkThread::stop()
{
    m_stop = true;
}

void WorkThread::paused()
{
    m_paused = true;
}

void WorkThread::begin()
{
    m_paused = false;
}

void MainWindow::on_pushButton_clicked()
{
    m_pWorkThread->begin();
}

void MainWindow::on_pushButton_2_clicked()
{
    m_pWorkThread->paused();
}

void MainWindow::on_pushButton_3_clicked()
{
    m_pWorkThread->stop();
}