Display message box on top of ui in the beginning

shreya_agrawal

I want to display a QMessageBox as soon as I run the application. But, I want it to be displayed on top of the ui. For this, I wrote the following code in my mainWindow constructor:

loadJSONData("/path/to/json");

if(!flag)
{
    ui->setupUi(this);
    QMessageBox msgBox;
    msgBox.setWindowTitle("Error");
    msgBox.setText("The flag is false. Do you still want to continue.");
    msgBox.setStandardButtons(QMessageBox::Ok);
    QAbstractButton *okButton = msgBox.button(QMessageBox::Ok);
    okButton->setText("Exit");
    msgBox.setWindowFlags(Qt::CustomizeWindowHint | Qt::WindowTitleHint);
    msgBox.exec();
    if(msgBox.clickedButton() == okButton)
    {
        QApplication::quit();
        return;
    }
}
else
{
    ui->setupUi(this);
}

When I run the application, I first see the QMessageBox and then on clicking the exit button (in the QMessageBox), the blank ui is visible. Instead, I want that the QMessage box should be displayed on top of a blank ui and the application should quit on clicking the exit button.

Note: We obtain the value of the flag from loadJSONData() function.

jsulm

@shreya_agrawal Don't create the message box in main window constructor - at that time main window is not fully constructed and is not shown. Do it in your main where you create the main window: create and show main window, then create and show the message box.

Pl45m4

@shreya_agrawal

Having a button named OK button with text saying "Exit" to quit the app is very confusing...

shreya_agrawal

@jsulm
Thank you for your reply!
Yes, it worked by creating it in the main!

shreya_agrawal

@Pl45m4
Yes, you are right. I was just testing the display of the message box for now. Thanks for pointing it out though.