Qt Qml tree model menu with translations

Question

I am trying to make an app with live translation of text in a large tree model menu structure, in the same manner as: https://code.qt.io/cgit/qt/qtbase.git/tree/examples/widgets/itemviews/simpletreemodel?h=5.15

The item's "data" is a QString that is translated like

root = new MenuObject(tr("Main menu"));

And children are appended like:

root->appendChild(new MenuObject(tr("Test 1")))
    .appendChild(new MenuObject(tr("Test 2")))

I am using QML to show these, with a qmllistpoprerty to show these menus like:

Q_PROPERTY(QQmlListProperty<MenuObject> list READ getList NOTIFY listChanged);

The QML is a simple ListView with a delegate Label showing the MenuObjects's description with the q_property:

Q_PROPERTY(QString description READ getDescription CONSTANT);

To change language i am using a function getting the translation file into the translator, followed by:

installTranslator(translator);
engine.retranslate();

Now this does work for simple q_properties like:

Q_PROPERTY(QString header READ getHeader NOTIFY listChanged);

Where

QString MainMenu::getHeader(){
    return tr("Header");
}

But I CANNOT get the translations to work for the items in the treemodel. Any help is appreciated.

Answer 1

If your description prop never fires an updated signal, then your UI will never refresh it.

The reason it works for Q_PROPERTY(QString header READ getHeader NOTIFY listChanged); is because presumably the listChanged() signal is fired whenever header is supposed to change also.

To fix it, you need to declare an appropriate NOTIFY signal for your description , and of course it is no longer a CONSTANT .