QObject::killTimers() warning after timer stopped from its own thread

[astodolski]

I have seen this topic in many places, on this and another forum, but I think not in the way that a QTimer is being used here.
I have a timer running in a thread created by moving an object to an instance of QThread (not the old method of sub-classing QThread). Everything appears to run normal except the message in the debugger window: QObject::killTimer: timers cannot be stopped from another thread.

Relevant code follows:

Worker.h

#ifndef WORKER_H
#define WORKER_H
 
#include <QObject>
#include <QTimer>
#include <QThread>
 
class Worker : public QObject
{
    Q_OBJECT
public:
    explicit Worker(QObject *parent = 0);
    virtual ~Worker();
 
signals:
    void finished();
    void updateProgress(int);
 
public slots:
    void start();
    void stop();
    void doWork();
 
private:
    QTimer* m_workerTimer;
};
 
class MThread : public QThread
{
    Q_OBJECT
public:
    MThread(QObject *parent) :  QThread(parent) {}
 
    static void  sleep(unsigned long secs)
    {
        QThread::sleep(secs);
    }
 
    static void msleep(unsigned long msecs)
    {
        QThread::msleep(msecs);
    }
};
 
#endif // WORKER_H

#ifndef WORKER_H
#define WORKER_H

#include <QObject>
#include <QTimer>
#include <QThread>

class Worker : public QObject
{
    Q_OBJECT
public:
    explicit Worker(QObject *parent = 0);
    virtual ~Worker();

signals:
    void finished();
    void updateProgress(int);

public slots:
    void start();
    void stop();
    void doWork();

private:
    QTimer* m_workerTimer;
};

class MThread : public QThread
{
    Q_OBJECT
public:
    MThread(QObject *parent) :  QThread(parent) {}

    static void  sleep(unsigned long secs)
    {
        QThread::sleep(secs);
    }

    static void msleep(unsigned long msecs)
    {
        QThread::msleep(msecs);
    }
};

#endif // WORKER_H

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Worker.cpp

#include "worker.h"
#include <QThread>
#include <QDebug>
 
volatile bool stopWork;
 
Worker::Worker(QObject *parent) : QObject(parent)
{
    m_workerTimer = new QTimer(this);
    stopWork = false;
}
 
Worker::~Worker()
{
    delete m_workerTimer;
}
 
void Worker::start()
{
    connect(m_workerTimer, SIGNAL(timeout()), this, SLOT(doWork()));
    m_workerTimer->start(100);
}
 
void Worker::stop()
{
    m_workerTimer->stop();
    emit finished();
    stopWork = true;
}
 
void Worker::doWork()
{
    for (int i = 0; i < 1000000; i++)
    {
        if (stopWork)
        {
            break;
        }
 
        if (i % 10000 == 0)
        {
            emit updateProgress((i / 10000) + 1);
            qDebug() << ((i / 10000) + 1);
            static_cast<MThread*>(QThread::currentThread())->msleep(10);
        }
    }
 
    emit finished();
}

#include "worker.h"
#include <QThread>
#include <QDebug>

volatile bool stopWork;

Worker::Worker(QObject *parent) : QObject(parent)
{
    m_workerTimer = new QTimer(this);
    stopWork = false;
}

Worker::~Worker()
{
    delete m_workerTimer;
}

void Worker::start()
{
    connect(m_workerTimer, SIGNAL(timeout()), this, SLOT(doWork()));
    m_workerTimer->start(100);
}

void Worker::stop()
{
    m_workerTimer->stop();
    emit finished();
    stopWork = true;
}

void Worker::doWork()
{
    for (int i = 0; i < 1000000; i++)
    {
        if (stopWork)
        {
            break;
        }

        if (i % 10000 == 0)
        {
            emit updateProgress((i / 10000) + 1);
            qDebug() << ((i / 10000) + 1);
            static_cast<MThread*>(QThread::currentThread())->msleep(10);
        }
    }

    emit finished();
}

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FlashWizard.cpp

#include "flashwizard.h"
#include "ui_flashwizard.h"
#include "worker.h"
 
#include <QThread>
#include <QDebug>
#include <QMessageBox>
 
FlashWizard::FlashWizard(QWidget *parent) : QWizard(parent), ui(new Ui::FlashWizard)
{
    ui->setupUi(this);
 
    ui->pbReading->reset();
    ui->pbWriting->reset();
 
    ui->lblReadingStatus->setText("");
    ui->lblReadingStatus->setText("");
    ui->lblProgStatus->setText("");
 
    connect(ui->introPage, SIGNAL(p1_updateLabelOne(const QString&)), this, SLOT(updateLabel(const QString&)));
    connect(this, SIGNAL(currentIdChanged(int)), this, SLOT(pageCleanUp(int)));
 
 
    worker = new Worker;
    workerThread = new QThread;
 
    worker->moveToThread(workerThread);
 
    connect(workerThread, SIGNAL(started()), worker, SLOT(start()));
    connect(workerThread, SIGNAL(finished()), worker, SLOT(stop()));
    connect(worker, SIGNAL(finished()), workerThread, SLOT(quit()));
    connect(worker, SIGNAL(finished()), ui->programPage, SLOT(setDone()));
    connect(worker, SIGNAL(updateProgress(int)), this, SLOT(updateWritingProgressBar(int)));
}
 
FlashWizard::~FlashWizard()
{
    delete ui;
}
 
void FlashWizard::updateWritingProgressBar(const int value)
{
    if (ui->pbWriting->maximum() == value)
        ui->pbWriting->hide();
    ui->pbWriting->setValue(value);
}
 
void FlashWizard::updateLabel(const QString &value)
{
    ui->lblReadingStatus->setText(value);
}
 
void FlashWizard::pageCleanUp(int id)
{
    if (id == Page_Program)
    {
        ui->lblProgStatus->setText("Updating ****");
        workerThread->start();
        qDebug() << "Now using thread: " << worker->thread();
    }
 
    ui->pbReading->setVisible(false);
    ui->lblUpdating->setText("");
}
 
 
void FlashWizard::reject()
{
    if (workerThread->isRunning())
    {
        worker->stop();
    }
 
}

#include "flashwizard.h"
#include "ui_flashwizard.h"
#include "worker.h"

#include <QThread>
#include <QDebug>
#include <QMessageBox>

FlashWizard::FlashWizard(QWidget *parent) : QWizard(parent), ui(new Ui::FlashWizard)
{
    ui->setupUi(this);

    ui->pbReading->reset();
    ui->pbWriting->reset();

    ui->lblReadingStatus->setText("");
    ui->lblReadingStatus->setText("");
    ui->lblProgStatus->setText("");

    connect(ui->introPage, SIGNAL(p1_updateLabelOne(const QString&)), this, SLOT(updateLabel(const QString&)));
    connect(this, SIGNAL(currentIdChanged(int)), this, SLOT(pageCleanUp(int)));


    worker = new Worker;
    workerThread = new QThread;

    worker->moveToThread(workerThread);

    connect(workerThread, SIGNAL(started()), worker, SLOT(start()));
    connect(workerThread, SIGNAL(finished()), worker, SLOT(stop()));
    connect(worker, SIGNAL(finished()), workerThread, SLOT(quit()));
    connect(worker, SIGNAL(finished()), ui->programPage, SLOT(setDone()));
    connect(worker, SIGNAL(updateProgress(int)), this, SLOT(updateWritingProgressBar(int)));
}

FlashWizard::~FlashWizard()
{
    delete ui;
}

void FlashWizard::updateWritingProgressBar(const int value)
{
    if (ui->pbWriting->maximum() == value)
        ui->pbWriting->hide();
    ui->pbWriting->setValue(value);
}

void FlashWizard::updateLabel(const QString &value)
{
    ui->lblReadingStatus->setText(value);
}

void FlashWizard::pageCleanUp(int id)
{
    if (id == Page_Program)
    {
        ui->lblProgStatus->setText("Updating ****");
        workerThread->start();
        qDebug() << "Now using thread: " << worker->thread();
    }

    ui->pbReading->setVisible(false);
    ui->lblUpdating->setText("");
}


void FlashWizard::reject()
{
    if (workerThread->isRunning())
    {
        worker->stop();
    }

}

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If I click the Cancel button on the Wizard, the loop stops and the thread with it. I get the message at the iteration of where it stops as to the timer being stopped from another thread. Is the context of the main UI thread attempting to stop the timer? It doesn't appear so.