How to attach closeEvent (QCloseEvent *event) to a Button

[Spinter]

I have the next doubt, I have an exit button created on the graphic interface, and I want to attach the closeEvent to him I have the next code but I couldnt make it work.

MainWindow::MainWindow(QWidget *parent) :
 
    QMainWindow(parent),
    ui(new Ui::MainWindow)
{
    ui->setupUi(this);
 
 
}
void MainWindow::on_exit_clicked()
{
    closeEvent( );
}
 
void MainWindow::closeEvent(QCloseEvent *event)    {
    QMessageBox::StandardButton resBtn = QMessageBox::question( this, "Images",
                                                                 tr("Are you sure to exit?\n"),
                                                                 QMessageBox::Cancel | QMessageBox::No | QMessageBox::Yes,
                                                                 QMessageBox::Yes);
     if (resBtn != QMessageBox::Yes) {
         event->ignore();
     } else {
         event->accept();
     }
}

MainWindow::MainWindow(QWidget *parent) :

    QMainWindow(parent),
    ui(new Ui::MainWindow)
{
    ui->setupUi(this);


}
void MainWindow::on_exit_clicked()
{
    closeEvent( );
}

void MainWindow::closeEvent(QCloseEvent *event)    {
    QMessageBox::StandardButton resBtn = QMessageBox::question( this, "Images",
                                                                 tr("Are you sure to exit?\n"),
                                                                 QMessageBox::Cancel | QMessageBox::No | QMessageBox::Yes,
                                                                 QMessageBox::Yes);
     if (resBtn != QMessageBox::Yes) {
         event->ignore();
     } else {
         event->accept();
     }
}

To copy to clipboard, switch view to plain text mode 

[Lesiok]

Replace line 12 with :

close();

close();

To copy to clipboard, switch view to plain text mode 

Of course, the button name is "exit", right?

[Spinter]

I suppose, it work but where I could find the name of buttons I mean I only use the mainwindow.ui to define all of them.

If it is that what you are referring to yes the name is exit

<item row="6" column="3">
       <widget class="QPushButton" name="exit">
        <property name="sizePolicy">
         <sizepolicy hsizetype="Fixed" vsizetype="Fixed">
          <horstretch>0</horstretch>
          <verstretch>0</verstretch>
         </sizepolicy>
        </property>
        <property name="minimumSize">
         <size>
          <width>50</width>
          <height>50</height>
         </size>
        </property>
        <property name="layoutDirection">
         <enum>Qt::RightToLeft</enum>
        </property>
        <property name="autoFillBackground">
         <bool>false</bool>
        </property>
        <property name="text">
         <string>Salir</string>
        </property>
       </widget>
      </item>

<item row="6" column="3">
       <widget class="QPushButton" name="exit">
        <property name="sizePolicy">
         <sizepolicy hsizetype="Fixed" vsizetype="Fixed">
          <horstretch>0</horstretch>
          <verstretch>0</verstretch>
         </sizepolicy>
        </property>
        <property name="minimumSize">
         <size>
          <width>50</width>
          <height>50</height>
         </size>
        </property>
        <property name="layoutDirection">
         <enum>Qt::RightToLeft</enum>
        </property>
        <property name="autoFillBackground">
         <bool>false</bool>
        </property>
        <property name="text">
         <string>Salir</string>
        </property>
       </widget>
      </item>

To copy to clipboard, switch view to plain text mode 

Thank you.

---

Added after 5 minutes:

Another question I have about that, sory xD I am too noob can I modify the text display whenI use that messageBox I mean:

QMessageBox::Cancel | QMessageBox::No | QMessageBox::Yes,
QMessageBox::Yes;

QMessageBox::Cancel | QMessageBox::No | QMessageBox::Yes,
QMessageBox::Yes;

To copy to clipboard, switch view to plain text mode 

For example , instead appear "Yes" appear "ok" in the box, or instead "No" , "Not really"

[anda_skoa]

Or directly connect the button's clicked() signal to the close() slot.

Cheers,
_

[Lesiok]

Another question I have about that, sory xD I am too noob can I modify the text display whenI use that messageBox I mean:

QMessageBox::Cancel | QMessageBox::No | QMessageBox::Yes,
QMessageBox::Yes;

QMessageBox::Cancel | QMessageBox::No | QMessageBox::Yes,
QMessageBox::Yes;

To copy to clipboard, switch view to plain text mode 

For example , instead appear "Yes" appear "ok" in the box, or instead "No" , "Not really"

Yes You can but not with static method question(). Read more about QMessageBox.

[Spinter]

Ok I try with no static

QMessageBox msgBox;
    QPushButton *buttonYes = msgBox.addButton(tr("Ok"), QMessageBox::Yes);
    QPushButton *buttonNo = msgBox.addButton(tr("Not really"), QMessageBox::No);
    QPushButton *buttonCancel = msgBox.addButton(tr("Cancel"), QMessageBox::Cancel);
 
 
    msgBox.exec();
 
    if (msgBox.clickedButton() == buttonYes) {
        event->accept();
    } else  {
        event->ignore();
    }

QMessageBox msgBox;
    QPushButton *buttonYes = msgBox.addButton(tr("Ok"), QMessageBox::Yes);
    QPushButton *buttonNo = msgBox.addButton(tr("Not really"), QMessageBox::No);
    QPushButton *buttonCancel = msgBox.addButton(tr("Cancel"), QMessageBox::Cancel);


    msgBox.exec();

    if (msgBox.clickedButton() == buttonYes) {
        event->accept();
    } else  {
        event->ignore();
    }

To copy to clipboard, switch view to plain text mode 

But I am obtaining next error

error: no matching function for call to 'QMessageBox::addButton(QString, QMessageBox::StandardButton)'
QPushButton *buttonYes = msgBox.addButton(tr("Ok"), QMessageBox::Yes);
^

---

Added after 55 minutes:

Well I solved it the problem was I needed a buttonRole not Yes, but YesRole

[INeedADollar]

I know it's a bit too late, but just call static function QApplication::exit() . This function will call the close event function with suitable QCloseEvent object.