The method QWidget:isMaximized() does not work as expected.

QWidget:isMaximized() seems to return the inverted result. A maximized widget (e.g. a QMainWindow) returns false and a minimized one true.

To illustrate this behaviour a QtCreator project is attached. The project consists of a simple QMainWindow overriding the resizeEvent method as follows:

void Maximized::resizeEvent(QResizeEvent * resizeEvent)
{
    const QString max = isMaximized() ? "true" : "false";

    ui.label_max->setText(QString("maximized: %1").arg(max));
}

The resize event sets one label's text inside the widget presenting the current result of isMaximized(). By compiling and executing this project you can see a maximized widget will result in false and a minimized in true.