qTextEdit focusOutEvent

[EricR]

I'm using Qt6 and Qt Creator. My QWidget window contains a QTextEdit widget named 'myTextEdit'. I want to be able to execute some application code when 'myTextEdit' looses focus. I see that QWidget class has a protected function 'focusOutEvent' but I don't know how to implement code that uses it. I'm requesting help with the code.

Not sure how to embed source code in this post, but here it is:

//
example.h
//

#ifndef example_H
#define example_H

#include <QWidget>

QT_BEGIN_NAMESPACE
namespace Ui {
class example;
}
QT_END_NAMESPACE

class example : public QWidget
{
Q_OBJECT

public:
example(QWidget *parent = nullptr);
~example();

private slots:

protected:

private:
Ui::example *ui;
};
#endif // example_H

//
example.cpp
//

#include "example.h"
#include "./ui_example.h" /*** contains a QTextEdit widget ***/

example::example(QWidget *parent)
: QWidget(parent)
, ui(new Ui::example)
{
ui->setupUi(this);
}

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

/*** Need to add code to handle 'myTextEdit' loosing focus via 'focusOutEvent' perhaps ***/

//
main.cpp
//

#include "example.h"

#include <QApplication>
#include <QLocale>
#include <QTranslator>

int main(int argc, char *argv[])
{
QApplication a(argc, argv);

QTranslator translator;
const QStringList uiLanguages = QLocale::system().uiLanguages();
for (const QString &locale : uiLanguages) {
    const QString baseName = "example_" + QLocale(locale).name();
    if (translator.load(":/i18n/" + baseName)) {
        a.installTranslator(&translator);
        break;
    }
}
example w;
w.show();
return a.exec();

}

[mpergand]

example::example(QWidget *parent)
: QWidget(parent)
, ui(new Ui::example)
{
ui->setupUi(this);

connect(qApp, &QApplication::focusChanged, this, [this](QWidget *old, QWidget *now)
	{
	if(old==ui->textEdit)
		{
		qDebug()<<"textEdit lose focus";
		}
	});
}