Can't override Qwidget closeEvent

gjiang

Hi I am new to Qt, and I am trying to pop up a dialog box when user click the close button on a qwidget, but I don't know why my closeEvent function did not get called at all.

I have a class look like this:

.h file

 class EditorPlugin : public QWidget
{
...
public:
virtual void closeEvent(QCloseEvent *event) override;
...
}

.cpp file

void EditorPlugin::closeEvent(QCloseEvent *event)
{
    QMessageBox msgBox;
    msgBox.setText("The document has been modified.");
    msgBox.setInformativeText("Do you want to save your changes?");
    msgBox.setStandardButtons(QMessageBox::Save | QMessageBox::Discard | QMessageBox::Cancel);
    msgBox.setDefaultButton(QMessageBox::Save);
    int ret = msgBox.exec();

    switch (ret) {
        case QMessageBox::Save:
            // Save was clicked
            break;
        case QMessageBox::Discard:
            // Don't Save was clicked
            break;
        case QMessageBox::Cancel:
            // Cancel was clicked
            break;
        default:
            // should never be reached
            break;
    }

    event->accept();
}

Anyone knows what is the problem? Thanks in advance.

SGaist

Hi,

Just tested it with a minimal application and it's working as expected.

Maybe a silly question but are you sure that you are closing an EditorPlugin instance ?

What close button do you mean ?
What version of Qt are you using ?
What platform are you running on ?

gjiang

Thanks for spending time looking into my problem. I really appreciate you helps. I made a mistake. I override the closeEvent in a wrong class.

VRonin

Final note: events should be protected, not public