Qt操作Thread类

 1 QT       += core gui
 2 QT       += network
 3 
 4 greaterThan(QT_MAJOR_VERSION, 4): QT += widgets
 5 
 6 CONFIG += c++11
 7 
 8 # The following define makes your compiler emit warnings if you use
 9 # any Qt feature that has been marked deprecated (the exact warnings
10 # depend on your compiler). Please consult the documentation of the
11 # deprecated API in order to know how to port your code away from it.
12 DEFINES += QT_DEPRECATED_WARNINGS
13 
14 # You can also make your code fail to compile if it uses deprecated APIs.
15 # In order to do so, uncomment the following line.
16 # You can also select to disable deprecated APIs only up to a certain version of Qt.
17 #DEFINES += QT_DISABLE_DEPRECATED_BEFORE=0x060000    # disables all the APIs deprecated before Qt 6.0.0
18 
19 SOURCES += \
20     main.cpp \
21     mainwindow.cpp
22 
23 HEADERS += \
24     mainwindow.h
25 
26 FORMS += \
27     mainwindow.ui
28 
29 # Default rules for deployment.
30 qnx: target.path = /tmp/$${TARGET}/bin
31 else: unix:!android: target.path = /opt/$${TARGET}/bin
32 !isEmpty(target.path): INSTALLS += target

 1 #include "mainwindow.h"
 2 
 3 #include <QApplication>
 4 
 5 int main(int argc, char *argv[])
 6 {
 7     QApplication a(argc, argv);
 8     MainWindow w;
 9     w.show();
10     return a.exec();
11 }

 1 #ifndef MAINWINDOW_H
 2 #define MAINWINDOW_H
 3 
 4 #include <QMainWindow>
 5 #include <QThread>
 6 #include <QPainter>
 7 #include <QVBoxLayout>
 8 #include <QPushButton>
 9 #include <QToolTip>
10 #include <QDebug>
11 #include <QTextEdit>
12 
13 QT_BEGIN_NAMESPACE
14 namespace Ui { class MainWindow; }
15 QT_END_NAMESPACE
16 
17 
18 class WorkThread : public QThread
19 {
20 
21 public:
22     WorkThread(QTextEdit *textEdit, QObject *parent = nullptr);
23     ~WorkThread();
24     // 结束线程
25     void stop();
26     void paused();
27     void begin();
28 protected:
29     bool m_stop;
30     bool m_paused;
31     QTextEdit *m_pTextEdit;
32     void run();
33 };
34 
35 class MainWindow : public QMainWindow
36 {
37     Q_OBJECT
38 
39 public:
40     MainWindow(QWidget *parent = nullptr);
41     ~MainWindow();
42 private slots:
43     void on_pushButton_clicked();
44 
45     void on_pushButton_2_clicked();
46 
47     void on_pushButton_3_clicked();
48 
49 private:
50     Ui::MainWindow *ui;
51     WorkThread *m_pWorkThread;
52 };
53 #endif // MAINWINDOW_H

 1 #include "mainwindow.h"
 2 #include "ui_mainwindow.h"
 3 
 4 MainWindow::MainWindow(QWidget *parent)
 5     : QMainWindow(parent)
 6     , ui(new Ui::MainWindow)
 7 {
 8     ui->setupUi(this);
 9     setWindowTitle(QStringLiteral("Qt操作Thread类"));
10 
11     m_pWorkThread = new WorkThread(ui->textEdit);
12     m_pWorkThread->start();
13 }
14 
15 MainWindow::~MainWindow()
16 {
17     delete ui;
18 
19     m_pWorkThread->stop();
20     m_pWorkThread->exit(0);
21     delete m_pWorkThread;
22 }
23 
24 void WorkThread::run()
25 {
26     while(!m_stop)
27     {
28         if (false == m_paused)
29         {
30             m_pTextEdit->append(QStringLiteral("进行中..."));
31         }
32         sleep(2);
33     }
34 }
35 
36 WorkThread::WorkThread(QTextEdit *textEdit, QObject *parent)
37     :QThread(parent)
38 {
39     m_stop = false;
40     m_paused = false;
41     m_pTextEdit = textEdit;
42 }
43 
44 WorkThread::~WorkThread()
45 {
46     // 请求终止
47     requestInterruption();
48     quit();
49     wait();
50 }
51 
52 void WorkThread::stop()
53 {
54     m_stop = true;
55 }
56 
57 void WorkThread::paused()
58 {
59     m_paused = true;
60 }
61 
62 void WorkThread::begin()
63 {
64     m_paused = false;
65 }
66 
67 void MainWindow::on_pushButton_clicked()
68 {
69     m_pWorkThread->begin();
70 }
71 
72 void MainWindow::on_pushButton_2_clicked()
73 {
74     m_pWorkThread->paused();
75 }
76 
77 void MainWindow::on_pushButton_3_clicked()
78 {
79     m_pWorkThread->stop();
80 }