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using System;
using System.Threading;
using System.Windows.Forms;

namespace Test
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        private void Form1_Shown(object sender, EventArgs e)
        {
            Thread lMyThread = new Thread(MyThread);
            lMyThread.Start();
        }

        private void MyThread()
        {
            while (true)
            {
                Invoke((MethodInvoker)(() => richTextBox1.AppendText("Foo" + Environment.NewLine)));
            }
        }

        private void Form1_FormClosing(object sender, EventArgs e)
        {
            Environment.Exit(0);
        }
    }
}

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void OutputWindow::on_pushButton_clicked()
{
    ui->pushButton->setVisible(false);

    MyThread* lMyThread = new MyThread(ui->textEdit);
    connect(lMyThread, SIGNAL(finished()), lMyThread, SLOT(deleteLater()));
    lMyThread->start();
}

Code: Alles auswählen

#ifndef MYTHREAD_H
#define MYTHREAD_H

#include <QtCore>
#include <QThread>
#include <QTextEdit>

class MyThread : public QThread
{
    Q_OBJECT

private:
    QTextEdit* mTextEdit;

public:
    MyThread(QTextEdit* parTextEdit);

protected:
    void run();
};

#endif // MYTHREAD_H

Code: Alles auswählen

#include "MyThread.h"

MyThread::MyThread(QTextEdit* parTextEdit = NULL)
{
    mTextEdit = parTextEdit;
}

void MyThread::run()
{
    while(true)
    {
        QMetaObject::invokeMethod(mTextEdit, "append", Qt::QueuedConnection, Q_ARG(QString, "Foo"));
    }

    exec();
}