Suggestions- Publishing data on a topic using Qt Slider

edit

Hello All,

I am new to ROS, I need help regarding implementation of qt-slider in ros.

Can any one help me or give suggestions, thanks in advance.

I have qt source files: Please have a look:

MainWindow::MainWindow()
{
    slider = new QSlider(Qt::Horizontal);
    slider->setMinimum(0);
    slider->setMaximum(100);
    lineEdit = new QLineEdit();

    QObject::connect(slider, SIGNAL(valueChanged(int)),
                     this, SLOT(onValueChanged(int)));

    QVBoxLayout *layout = new QVBoxLayout();
    layout->addWidget(slider);
    layout->addWidget(lineEdit);

    QWidget *wrapper = new QWidget();
    wrapper->setLayout(layout);
    setCentralWidget(wrapper);
}

MainWindow::~MainWindow()
{
}

void MainWindow::onValueChanged(int value)
{
    int pos = slider->sliderPosition();
    QByteArray convertedValue = QByteArray::number(pos,16);
    QString m = QString(convertedValue);
    m= "0x"+m;
    QString id,len, canmsg;
    id="0x01 ";
    len="0x01 ";
    canmsg=id+len+m;
    lineEdit->setText(canmsg);
}

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

Can any one help me to publish this message(i mean 'canmsg') on topic(any). As discussed in qt ros, I made changes in cmakelist.txt. Thanks for reading.