Freeze using QTimer with interval 0

[Alundra]

#include <QMainWindow>
#include <QDockWidget>
#include <QApplication>
#include <QTimer>
 
class TestWidget : public QWidget
{
public:
 
    TestWidget(QWidget* parent = 0) :
    QWidget(parent),
    m_Initialized(false)
    {
        m_Timer.setInterval(0);
    }
 
    QPaintEngine* paintEngine() const
    {
        return NULL;
    }
 
    void showEvent(QShowEvent* event)
    {
        if(m_Initialized == false)
        {
            connect(&m_Timer, SIGNAL(timeout()), this, SLOT(repaint()));
            m_Timer.start();
            m_Initialized = true;
        }
    }
 
private:
 
    QTimer m_Timer;
    bool m_Initialized;
};
 
class MainWindow : public QMainWindow
{
public:
 
    MainWindow(QWidget* parent = 0) :
    QMainWindow(parent)
    {
        QDockWidget* NewDock = new QDockWidget("Test", this);
        NewDock->setWidget(new TestWidget(this));
        addDockWidget(Qt::BottomDockWidgetArea, NewDock);
    }
};
 
int main(int argc, char *argv[])
{
    QApplication a(argc, argv);
    MainWindow w;
    w.show();
    return a.exec();
}

#include <QMainWindow>
#include <QDockWidget>
#include <QApplication>
#include <QTimer>

class TestWidget : public QWidget
{
public:

    TestWidget(QWidget* parent = 0) :
    QWidget(parent),
    m_Initialized(false)
    {
        m_Timer.setInterval(0);
    }

    QPaintEngine* paintEngine() const
    {
        return NULL;
    }

    void showEvent(QShowEvent* event)
    {
        if(m_Initialized == false)
        {
            connect(&m_Timer, SIGNAL(timeout()), this, SLOT(repaint()));
            m_Timer.start();
            m_Initialized = true;
        }
    }

private:

    QTimer m_Timer;
    bool m_Initialized;
};

class MainWindow : public QMainWindow
{
public:

    MainWindow(QWidget* parent = 0) :
    QMainWindow(parent)
    {
        QDockWidget* NewDock = new QDockWidget("Test", this);
        NewDock->setWidget(new TestWidget(this));
        addDockWidget(Qt::BottomDockWidgetArea, NewDock);
    }
};

int main(int argc, char *argv[])
{
    QApplication a(argc, argv);
    MainWindow w;
    w.show();
    return a.exec();
}

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