QT学习笔记之十八 Threads Qt多线程练习

多线程这个部分看得晕晕的....

 

随便搞了段代码...

 

=============================================================================

部分代码如下：

 

threads.h

#ifndef THREADS_H#define THREADS_H#include <QThread>class Threads : public QThread{ Q_OBJECTpublic: Threads(); void setMessage(const QString &message); void stop();protected: void run();private: QString messageStr; volatile bool stopped;};#endif // THREADS_H

 

threads.cpp

#include <QtCore>#include <iostream>#include "threads.h"Threads::Threads(){ stopped = false;}void Threads::setMessage(const QString &message){ messageStr = message;}void Threads::run(){ while(!stopped) std::cout << qPrintable(messageStr) <<std::endl;}void Threads::stop(){ stopped = true;}

 

threadDialog.h

#ifndef THREADDIALOG_H#define THREADDIALOG_H#include <QDialog>#include "threads.h"class ThreadDialog : public QDialog{ Q_OBJECTpublic: ThreadDialog(QWidget *parent = 0);protected: void closeEvent(QCloseEvent *event);private slots: void startOrStopThreadA(); void startOrStopThreadB();private: Threads threadA; Threads threadB; QPushButton *threadAButton; QPushButton *threadBButton; QPushButton *quitButton;};#endif // THREADDIALOG_H

 

threadDialog.cpp

#include <QtGui>#include "threaddialog.h"ThreadDialog::ThreadDialog(QWidget *parent) : QDialog(parent){ threadA.setMessage("Thread A is start"); threadB.setMessage("Thread B is start"); threadAButton = new QPushButton(tr("Start A")); threadBButton = new QPushButton(tr("Start B")); quitButton = new QPushButton(tr("Quit")); quitButton->setDefault(true); connect(threadAButton, SIGNAL(clicked()),this, SLOT(startOrStopThreadA())); connect(threadBButton,SIGNAL(clicked()), this, SLOT(startOrStopThreadB())); connect(quitButton, SIGNAL(clicked()), this, SLOT(close())); QHBoxLayout *layout = new QHBoxLayout; layout->addWidget(threadAButton); layout->addWidget(threadBButton); layout->addWidget(quitButton); setLayout(layout); setWindowTitle(tr("Thread Test"));}void ThreadDialog::startOrStopThreadA(){ if (threadA.isRunning()) { threadA.stop(); threadAButton->setText(tr("Start A")); } else { threadA.start(); threadAButton->setText(tr("Stop A")); }}void ThreadDialog::startOrStopThreadB(){ if (threadB.isRunning()) { threadB.stop(); threadBButton->setText(tr("Start B")); } else { threadB.start(); threadBButton->setText(tr("Stop B")); }}void ThreadDialog::closeEvent(QCloseEvent *event){ threadA.stop(); threadB.stop(); threadA.wait(); threadB.wait(); event->accept();}

 

这个程序没有优化，感觉有点站内存的说，看看就好哈