Qt: Displaying an int in a message box - c++

Question

I have a timer/clock that displays a message X amounts of seconds (usually 10) after it has been clicked. I attempted to set up an int that one could set easily to change what X is, however I am having trouble with displaying the message, which includes the value of X, in a message box.
What I want:
Where the value "10" is changed by an int.
The specific line of code for the messagebox:
void MainWindow::messageBox(){
QMessageBox::information(this, "Warning!", "You clicked the button of doom " + timerLength/1000 + " seconds ago!");
} //timerLength is an int.
mainwindow.cpp:
#include "mainwindow.h"
#include "ui_mainwindow.h"
#include <qDebug>
MainWindow::MainWindow(QWidget *parent)
: QMainWindow(parent)
, ui(new Ui::MainWindow)
{
ui->setupUi(this);
QTimer *timer = new QTimer(this); //Set up timer.
connect(timer, SIGNAL(timeout()), this, SLOT(showtime()));
//showtime();
timer->start();
messageBox();
otherTimer = new QTimer(this);
otherTimer->setSingleShot(true);
connect(otherTimer, SIGNAL(timeout()), this, SLOT(messageBox()));
}
void MainWindow::showtime(){ //Displays current time. Needs to be manually updated.
QTime time = QTime::currentTime();
QString lcdText = time.toString("mm:ss");
ui->lcdNumber->QLCDNumber::display(lcdText);
}
MainWindow::~MainWindow(){
delete ui;
}
void MainWindow::on_pushButton_clicked(){
int timerLength = 10000;
otherTimer->start(timerLength);
QPropertyAnimation *progresBar = new QPropertyAnimation(ui->graphicsView, "geometry");
progresBar->setDuration(timerLength);
QRect barLocation =ui->graphicsView->geometry();
progresBar->setStartValue(QRect(barLocation.x(), barLocation.y(), 0, barLocation.height()));
progresBar->setEndValue(barLocation);
progresBar->start();
}
void MainWindow::messageBox(){
QMessageBox::information(this, "Warning!", "You clicked the button of doom " + timerLength/1000 + " seconds ago!");
}
main.h
#ifndef MAINWINDOW_H
#define MAINWINDOW_H
#include <QMainWindow>
#include <QTimer>
#include <QDateTime>
#include <QLCDNumber>
#include <QMessageBox>
#include <QPropertyAnimation>
QT_BEGIN_NAMESPACE
namespace Ui { class MainWindow; }
QT_END_NAMESPACE
class MainWindow : public QMainWindow
{
Q_OBJECT
public:
MainWindow(QWidget *parent = nullptr);
~MainWindow();
int timerLength;
public slots:
void showtime();
void messageBox();
private slots:
void on_pushButton_clicked();
private:
Ui::MainWindow *ui;
QTimer *otherTimer;
};
#endif // MAINWINDOW_H
Please let me know if more information or explanation is required.

Answer 1

You can convert your number to QString like
void MainWindow::messageBox(){
QMessageBox::information(this, "Warning!", "You clicked the button of doom " + QString::number(timerLength/1000) + " seconds ago!");
} //timerLength is an int.
I tried it works in my app.