QMutex 的简单案例-白红宇

QMutex 的简单案例

阅读量：7165 次

发布时间：2019-06-29

本文共 2599 字，大约阅读时间需要 8 分钟。

#ifndef MYDIALOG_H#define MYDIALOG_H#include"mythread.h"#include
      
       #include
       
        #include
        
         #include 
         
          class MyDialog : public QWidget{    Q_OBJECTpublic:    MyDialog(QWidget *parent = 0);    ~MyDialog();    void closeEvent(QCloseEvent *e);private:    myThread *mThread;    QPushButton *startBtn;    QPushButton *stopBtn;    QLabel *label;public slots:    void onNumberChanged(int);    void startBtn_click();    void stopBtn_click();};#endif // MYDIALOG_H

MyDialog.h

#ifndef MYTHREAD_H#define MYTHREAD_H#include 
      
       #include
       
        class myThread : public QThread{    Q_OBJECTpublic:    myThread(QObject *parent=0);    virtual void run();    bool Stop;    bool needQuit;signals:    void NumberChanged(int);};#endif // MYTHREAD_H

myThread.h

#include "mydialog.h"#include 
      
       #include 
       
        MyDialog::MyDialog(QWidget *parent)    : QWidget(parent){    startBtn = new QPushButton("Start");    stopBtn = new QPushButton("Stop");    label = new QLabel;    label->setText("Number");    QHBoxLayout *layout = new QHBoxLayout;    layout->addWidget(label);    layout->addSpacing(20);    layout->addWidget(startBtn);    layout->addWidget(stopBtn);    setLayout(layout);    mThread = new myThread(this);    QObject::connect(mThread, SIGNAL(NumberChanged(int)), this, SLOT(onNumberChanged(int)));    QObject::connect(startBtn, SIGNAL(clicked()), this, SLOT(startBtn_click()));    QObject::connect(stopBtn, SIGNAL(clicked()), this, SLOT(stopBtn_click()));}MyDialog::~MyDialog(){}void MyDialog::onNumberChanged(int number){    label->setText(QString::number(number));}void MyDialog::startBtn_click(){    mThread->Stop = false;    mThread->start();}void MyDialog::stopBtn_click(){    mThread->Stop = true;}void MyDialog::closeEvent(QCloseEvent *e){    mThread->needQuit = true;    qDebug() << "close event";    mThread->requestInterruption();    mThread->Stop = false;    mThread->wait(1001);    mThread->exit();

mydialog.cpp

#include "mythread.h"myThread::myThread(QObject*parent):QThread(parent){    needQuit = false;}void myThread::run(){    for (int i= 0; i < 1000; i++)    {        QMutex mutex;        mutex.lock();        if(this->Stop)        {            while(1){                if(!this->Stop)                    break;            }        }        if(needQuit){            mutex.unlock();            return;        }        mutex.unlock();        emit NumberChanged(i);        msleep(100);    }}

myThread.cpp

转载于:https://www.cnblogs.com/TadGuo/p/9016499.html

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