Unable to connect QDial to QLCDNumber

Josz

Hello community,
I created both items in the .ui graphical tool. No way to connect them. No idea what did I wrong.
Please, somebody so kind to help me?
here is my code

#ifndef MAINWINDOW_H
#define MAINWINDOW_H

#include <QMainWindow>
#include <QObject>

namespace Ui {
class MainWindow;
}

class MainWindow : public QMainWindow
{
    Q_OBJECT

public:
    explicit MainWindow(QWidget *parent = nullptr);
    ~MainWindow();

private:
    Ui::MainWindow *ui;
};

#endif // MAINWINDOW_H

#include "mainwindow.h"
#include "ui_mainwindow.h"
#include <QDebug>
//QLCDNumber , QDial

MainWindow::MainWindow(QWidget *parent) :
    QMainWindow(parent),
    ui(new Ui::MainWindow)
{
    ui->setupUi(this);
    /* dialCels is the QDial and lcdCels the QLCDNumber*/
    qDebug() << "Connected? " << 
         connect(ui->dialCels, SIGNAL(ValueChanged(int)), ui->lcdCels, SLOT(display(int)) );

}

MainWindow::~MainWindow()
{
    delete ui;
}

Thanks in advance

SGaist

Hi and welcome to devnet,

You have a typo, it's valueChanged.

You should use Qt 5 new syntax, it would have failed at build time.
Note that you should also see a warning in the application output at runtime in your case.

Josz

Thank you very much SGaist, my fail was that I wrote ValueChanged instead valueChanged :-(.

I wonder, why did not the compiler warn me?

SGaist

Because you are using the old syntax. See the documentation here.

Josz

@SGaist Thank you again.