[SOLVED] Quit the program by pressing ESC

[ale6111]

Hi,

I wrote this:

void MainWindow::quitProgram(QKeyEvent *event)
{
    if(event->key() == Qt::Key_Escape)
        qApp->quit();
}

void MainWindow::quitProgram(QKeyEvent *event)
{
    if(event->key() == Qt::Key_Escape)
        qApp->quit();
}

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but it doesn't work.
Where I'm wrong?
Thanks.

[Zlatomir]

You can't access the QApplication object from there (and the QApplication object might have a different name)

One possible solution is to emit a signal when the Esc has been presed (example: closeExe(); or EscPresed();... ) and connect (in main.cpp), something like:

QObject::connect(&MainWindowObject, SIGNAL(closeExe()), &QApplicationObject, SLOT(quit()));

QObject::connect(&MainWindowObject, SIGNAL(closeExe()), &QApplicationObject, SLOT(quit()));

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[Lykurg]

Sine QApplication is a singleton class you can access it form everywhere with qApp. So one possibility is to use QWidget::keyPressEvent() and put your code there. Then it should work.

[ale6111]

Yes it works, it was what I wanted to do, my mistake . Thanks.