QSystemTrayIcon in a Qt5 Designer Ui file

Question

I am trying to load all my forms from the Ui files with QUiLoader. I ran into the problem with QSystemTrayIcon. For some reason QFormBuilder fails to load my form.

My Ui file:

<?xml version="1.0" encoding="UTF-8"?>
<ui version="4.0">
    <class>SystemTrayIcon</class>
    <widget class="QSystemTrayIcon" name="SystemTrayIcon">
        <property name="icon">
            <iconset>:/icons/tray_icon.png</iconset>
        </property>
    </widget>
    <resources/>
    <connections/>
</ui>

And I load it with the following code:

tray_icon tray_icon_factory::build()
{
    QUiLoader loader;
    QFile file(":/forms/tray_icon.ui");

    file.open(QFile::ReadOnly);
    QWidget *widget = loader.load(&file);
    file.close();

    tray_icon the_tray_icon(widget);
    return the_tray_icon;
}

When I compile and run my application I get the following error:

"QFormBuilder was unable to create a widget of the class 'QSystemTrayIcon'."

What I am doing wrong and how I can fix this problem?

Answer 1

QSystemTrayIcon is not a widget, so you can't create it from an ui file.