How to give a command to a button?

Question

Qt

How to give QDialogButtonBox::Ok a command? At least for closing
file.h

#ifndef FILE_H
#define FILE_H

#include <QDialog>


namespace Ui {
class File;
}

class File : public QDialog
{
    Q_OBJECT

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

private:
    Ui::File *ui;
    void okCliced();
signals:
    void filePath(const QString &str); // генерация сигнлала filePath


};

#endif // FILE_H

file.cpp

#include "file.h"
#include "ui_file.h"
#include <QPushButton>

File::File(QWidget *parent) :
    QDialog(parent),
    ui(new Ui::File)
{
    ui->setupUi(this);
    connect(ui->buttonBox->button(QDialogButtonBox::Ok),SIGNAL(clicked()), SLOT(okCliced())); // ТУТ
    connect(ui->buttonBox->button(QDialogButtonBox::Cancel),SIGNAL(clicked()), SLOT(close()));
}

void File::okCliced()
{
    //emit filePath(ui->lineEdit->text()); /// генерировать сигнал
    close();
}

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

Answer 1

Well, for starters, there is doc.qt.io/qt-5/qfiledialog.html for your purposes with a bunch of static methods for all occasions. And use it.
If you added all the buttons to the buttonBox, then your code should work. To close a dialog, call the doc.qt.io/qt-5/qdialog.html#done method .