copyAlphaChannel(image1, image2);

QSqlTableModel *model = new QSqlTableModel ;
model->setTable("dataBaseTable");
model->select();
 
QColumnView *view = new QColumnView;
view->setModel(model);

void UDP::UDPtInit()
{
    socketPort = PORT;
    udpsocket = new QUdpSocket(this);
    if(!udpsocket->bind(QHostAddress("192.168.111.1"),socketPort))
    {
        qDebug() << "true";
    }
    else
    {
        qDebug() << "false";
    }
    connect(udpsocket,SIGNAL(readyRead()),this,SLOT(readState()));
 
    connect(udpsocket,SIGNAL(connected()),this,SLOT(socketConnected()));
 
    connect(udpsocket,SIGNAL(error(QAbstractSocket::SocketError)),this,SLOT(socketError(QAbstractSocket::SocketError)));
 
    emit clientActive(true);
}
 
 
void UDP::socketError( QAbstractSocket::SocketError )
{
    qDebug() << "UDPCLIENT ERROR: "<< udpsocket->errorString();
}
 
 
void    UDP::socketConnected()
{
    qDebug() << "UDPCLIENT : Socket connected!";
    emit clientLogMessage(QString("UDPCLIENT : Connected !"));
}

#include <QApplication>
#include <QLabel>
 
int main(int argc, char *argv[])
{
    QApplication a(argc, argv);
 
    QLabel label("label");
    label.setAttribute(Qt::WA_TranslucentBackground);
    label.setFixedSize(400,400);
    label.show();
 
    return a.exec();
}

setOverrideCursor(QCursor(QPixmap("CircumpunctCursor.bmp")));

signals:
   void popUpMenu();

void qlabel::mousePressEvent(QMouseEvent *ev)
{
    if(ev->button()==Qt::RightButton)
    {
        emit popUpMenu();
    }
...
}

connect(ui->label2, SIGNAL(popUpMenu()), this, SLOT(slPopUpMenu()));
...
void MainWindow::slPopUpMenu()
{
QMenu *newMenu = new QMenu(this);
newMenu->addAction(new QAction("do this", this));
newMenu->addAction(new QAction("do that", this));
newMenu->addAction(new QAction("Cancel", this));
newMenu->exec(newMenu, QCursor::pos());
}

newMenu->exec(QCursor::pos());

void MainWindow::on_pushButton_clicked()
{
    w = new QWidget(this);
    w->move(0, 0);
    w->setFixedSize(50, 200);
    w->setVisible(true);
}
 
void MainWindow::on_pushButton_2_clicked()
{
    delete w;
}