Close button dialog without closeEvent

[viniltc]

Hi,

I'm trying to setup a prompt message when the "close" button is pressed. Currently, I'm doing something like this:

void ShoulderControl::closeEvent(QCloseEvent *event)
{
    QMessageBox::StandardButton reply;
    reply = QMessageBox::question(this, "App", "You are about to close this window, have you saved the settings?",
                                  QMessageBox::Yes|QMessageBox::No);
    if (reply == QMessageBox::Yes) {
        event->accept();
    }
    else if(reply == QMessageBox::No) {
        event->ignore();
    }
}

My requirement is to show the message only when a user presses the close button, NOT when by window closes on its own. Any suggestions on possible workarounds?

[JonB]

@viniltc said in Close button dialog without closeEvent:

NOT when by window closes on its own.

What precisely does this mean? Windows do not "close on their own", just because they feel like it :) Do you mean your code may call ShoulderControl::close() explicitly? In that case use the QCloseEvent *event parameter to check the value of event->spontaneous() to distinguish.

[viniltc]

@JonB there are multiple windows in my application, and I sometimes switch between windows by closing one or another. I do not want to show the closeEvent message every time unless the user presses the close button on the window.

[JonB]

@viniltc said in Close button dialog without closeEvent:

and I sometimes switch between windows by closing one or another

I really don't know what you mean. "Switching between windows" does not generate close events, and closing one window does not generate a close event in a different window. You can close a window by clicking its Close button --- QEvent::spontaneous() == true --- or by calling close() from code --- QEvent::spontaneous() == false. Which is what you asked to distinguish.

[viniltc]

@JonB thanks a lot , this worked for me!

void ShoulderControl::closeEvent(QCloseEvent *event)
{
    if(event->spontaneous()){
        QMessageBox::StandardButton reply;
        reply = QMessageBox::question(this, "App", "Are you sure want to close this window?",
                                      QMessageBox::Yes|QMessageBox::No);
        if (reply == QMessageBox::Yes) {
            event->accept();
        }
        else if(reply == QMessageBox::No) {
            event->ignore();
        }
    }
}