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
main.cpp
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 }
mainwindow.h
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 }
