Status bar in QT

[studsp10]

I would like to add the status bar to my program, but I can't find any examples of it online.

I saw few people using some forms which I don't use. I would like my status bar to be able to show text length and his coordinates. And also I would like to refresh it after every change (changing the text and it's position).

My code currently can change the display text, change it's position using mouse or keyboard and save that data into a file or open that file and load data.

My code:
#include <QApplication>
#include <QLabel>
#include <QMainWindow>
#include <QMouseEvent>
#include <QMessageBox>
#include <QVBoxLayout>
#include <QFormLayout>
#include <QDialogButtonBox>
#include <QLineEdit>
#include <QAction>
#include <QMenu>
#include <QMenuBar>
#include <QPainter>
#include <QFileDialog>
#include <QTextStream>
#include <QStatusBar>

class MyDialog : public QDialog {
public:
MyDialog();
QVBoxLayout* mainLayout;
QWidget* editWidget;
QFormLayout* editLayout;
QLineEdit* lineEdit;
QDialogButtonBox* buttonBox;

};

MyDialog::MyDialog() {
lineEdit = new QLineEdit;
editLayout = new QFormLayout;
editLayout->addRow(new QLabel(tr("Novi tekst:")), lineEdit);
editWidget = new QWidget;
editWidget->setLayout(editLayout);
buttonBox = new QDialogButtonBox(QDialogButtonBox::Ok |
QDialogButtonBox::Cancel);
connect(buttonBox, SIGNAL(accepted()), this, SLOT(accept()));
connect(buttonBox, SIGNAL(rejected()), this, SLOT(reject()));
mainLayout = new QVBoxLayout;
mainLayout->addWidget(editWidget);
mainLayout->addWidget(buttonBox);
setLayout(mainLayout);
setWindowTitle("Promjena teksta");

}

class MyMainWindow : public QMainWindow {
public:
MyMainWindow();
QLabel* MyLabel;
QMenu* EditMenu;
QAction* EditNoviTekst;

void mousePressEvent(QMouseEvent *event) override;
void keyPressEvent(QKeyEvent *event) override;
void paintEvent(QPaintEvent *event) override;

void createStatusBar();

void EditNoviTekstMenu();

void FileSaveAsMenu();
void FileOpenMenu();
QMenu* FileMenu;
QAction* FileSaveAs;
QAction* FileOpen;

};

void MyMainWindow::mousePressEvent(QMouseEvent* event) {
if (event->button() == Qt::LeftButton) {
MyLabel->move(event->x(), event->y());
}
}

void MyMainWindow::keyPressEvent(QKeyEvent *event) {
switch( event->key() ){
case Qt::Key_Left: MyLabel->move(MyLabel->pos().x()-1,
MyLabel->pos().y());
break;
case Qt::Key_Right: MyLabel->move(MyLabel->pos().x()+1,
MyLabel->pos().y());
break;
case Qt::Key_Up: MyLabel->move(MyLabel->pos().x(),
MyLabel->pos().y()-1);
break;
case Qt::Key_Down: MyLabel->move(MyLabel->pos().x(),
MyLabel->pos().y()+1);
break;
}
}

MyMainWindow::MyMainWindow() {
MyLabel = new QLabel(this);
MyLabel->setText("Hello World!");
MyLabel->move(10, 20);

FileSaveAs = new QAction(tr("&Save As..."), this);
FileSaveAs->setShortcut(tr("CTRL+S"));
connect(FileSaveAs, &QAction::triggered, this,&MyMainWindow::FileSaveAsMenu);

FileOpen = new QAction(tr("&Open..."), this);
FileOpen->setShortcut(tr("CTRL+O"));
connect(FileOpen, &QAction::triggered, this,&MyMainWindow::FileOpenMenu);

FileMenu = menuBar()->addMenu(tr("&File"));
FileMenu->addAction(FileSaveAs);
FileMenu->addAction(FileOpen);

EditNoviTekst = new QAction(tr("&Novi tekst..."), this);
EditNoviTekst->setShortcut(tr("CTRL+N"));
connect(EditNoviTekst, &QAction::triggered, this,&MyMainWindow::EditNoviTekstMenu);

EditMenu = menuBar()->addMenu(tr("&Edit"));
EditMenu->addAction(EditNoviTekst);

}
void MyMainWindow::FileSaveAsMenu(){
QString fileName = QFileDialog::getSaveFileName(this,"Save As...", "", "FESB File (*.fsb)");

    if (!fileName.isEmpty()) {
        QFile file(fileName);
        if (!file.open(QIODevice::WriteOnly)) {
            QMessageBox::information(this,"Unable to Open File", file.errorString());
            return;
        }
        QTextStream out(&file);
        out << "fesb file" << endl;
        out << MyLabel->text() << endl;
        out << MyLabel->pos().x() << endl;
        out << MyLabel->pos().y() << endl;
        out << pos().x() << endl;
        out << pos().y() << endl;
        out << size().width() << endl;
        out << size().height() << endl;
    }

}
void MyMainWindow::FileOpenMenu(){
QString fileName = QFileDialog::getOpenFileName(this,"Open Geometry...", "", "Your File (*.ur)");
if (!fileName.isEmpty()) {
QFile file(fileName);
if (!file.open(QIODevice::ReadOnly)) {
QMessageBox::information(this, "Unable to Open File", file.errorString());
return;
}
QTextStream in(&file);
QString str; str = in.readLine();
if(str=="fesb file") {
str = in.readLine();
MyLabel->setText(str);
int x, y, w, h;
in >> x >> y;
MyLabel->move(x, y);
in >> x >> y >> w >> h;
this->setGeometry(x, y, w, h);
}
}
}

void MyMainWindow::EditNoviTekstMenu() {
MyDialog dialog;
int ret = dialog.exec();
if( ret == QDialog::Accepted ) {
MyLabel->setText(dialog.lineEdit->text());
}
}

void MyMainWindow::paintEvent(QPaintEvent*){
QSize size = this->size();
QPainter painter(this);
painter.drawLine(0, size.height(), size.width(), 20);
}

int main(int argc, char **argv) {
QApplication app (argc, argv);
MyMainWindow mainWindow;
mainWindow.resize(300,150);
mainWindow.show();
return app.exec();
}

[artwaw]

Hi,
what happens when you add QStatusBar and use QMainWindow::setStatusBar()?