I was trying to set the close event to my code but when I set this code my program crashes.
mainwindow.cpp
void MainWindow::closeEvent(QCloseEvent *event)
{
event->ignore();
if (QMessageBox::Yes == QMessageBox::question(this, "Close Confirmation?",
"Are you sure you want to exit?",
QMessageBox::Yes|QMessageBox::No))
{
if(QMessageBox::Yes)
{
if(aboutDialog)
{
aboutDialog->close();
event->accept();
}
event->accept();
}
}
}
void MainWindow::showAboutDialog()
{
aboutDialog = new QDialog;
Ui::About aboutUi;
aboutUi.setupUi(aboutDialog);
connect(aboutUi.Close, SIGNAL(pressed()), aboutDialog, SLOT(close()));
aboutDialog->show();
}
mainwindow.h
private:
QDialog *aboutDialog;
I am confused why this happens. Help me out to solve this!
Don't ignore the event if you're planning to close, try this:
void MainWindow::closeEvent(QCloseEvent *event)
{
if (QMessageBox::Yes != QMessageBox::question(this, "Close Confirmation?",
"Are you sure you want to exit?", QMessageBox::Yes | QMessageBox::No))
{
event->ignore();
}
}
And when creating the aboutDialog
-box, you should pass the mainWindow
as parent as Nejat's comment suggests: aboutDialog = new QDialog(mainWindow);
. This will make sure that the aboutDialog
will get closed if the main window closes.
The technical post webpages of this site follow the CC BY-SA 4.0 protocol. If you need to reprint, please indicate the site URL or the original address.Any question please contact:yoyou2525@163.com.