class myTextEdit: public QTextEdit
{
Q_OBJECT

signals:
    void showContextMenu(QPoint);

protected:
    virtual void contextMenuEvent(QContextMenuEvent *event)
    {
        emit showContextMenu(event->globalPos());
    }

class Widget: public QWidget
{
    Q_OBJECT
public:  
    Widget(QWidget *parent = 0)
    {
  
        connect(&textEdit, SIGNAL(showContextMenu(QPoint)),
                this, SLOT(showContextMenu(QPoint)));
    }

private:
    MyTextEdit textEdit;

private slots:
    void showContextMenu(QPoint point)
    {
        QMenu *menu = new QMenu();
        menu->addAction("Action1");
        menu->addAction("Action2");
        menu->exec(point);
        delete menu;
    }

protected:
    virtual void contextMenuEvent(QContextMenuEvent *event)
    {
        showContextMenu(event->globalPos());
    }
};

   QPoint position;

    void mousePressEvent(QMouseEvent *event)
    {
     position = event->pos();
    }

    void mouseMoveEvent(QMouseEvent *event)
    {
     move(event->globalPos() - position);
    }
};

class AbstractNote: public QWidget
{
    Q_OBJECT
public:
    explicit AbstractNote(QWidget *parent = 0)
    {
        setWindowFlags(Qt::Window | Qt::FramelessWindowHint);

        HWND hwnd = winId();

        SetWindowLong(hwnd, GWL_EXSTYLE, GetWindowLong(hwnd, GWL_EXSTYLE) | WS_EX_TOOLWINDOW);

        show();
    }

protected:
    virtual void paintEvent(QPaintEvent *)
    {
        QPainter painter(this);

        painter.setBrush(Qt::yellow);
        painter.drawRect(rect());
    }

    virtual void mouseDoubleClickEvent(QMouseEvent *)
    {
        close();
    }
};

class AbstractNote: public QWidget
{
    Q_OBJECT
public:
    explicit AbstractNote(QWidget *parent = 0)
    {
        setWindowFlags(Qt::SplashScreen);
        setAttribute(Qt::WA_DeleteOnClose);
    }

protected:
    virtual void paintEvent(QPaintEvent *)
    {
        QPainter painter(this);

        painter.setBrush(Qt::yellow);
        painter.drawRect(rect());
    }

    virtual void mouseDoubleClickEvent(QMouseEvent *)
    {
        close();
    }
};