Shell.Title and Window.Title currently doesn't propagate to the catalyst window title

[PureWeen]

Description

The title on the window and shell component don't currently propagate to the UIScene title property.

Here's an example of a workaround
https://github.com/PureWeen/dotnetConfDemo2022/blob/main/dotnetConfDemo/Windows/ScopedWindow.cs#L35

[ghost]

We've moved this issue to the Backlog milestone. This means that it is not going to be worked on for the coming release. We will reassess the backlog following the current release and consider this item at that time. To learn more about our issue management process and to have better expectation regarding different types of issues you can read our Triage Process.

[mattleibow]

This is most likely related to #12646

[mattleibow]

Seems the Title is not bubbled up, but thisis also partially by design as some apps do not wish the APP title to match the current page.

If you do, you could maybe put something like this in your shell code-behind (AppShell.xaml.cs):

protected override void OnPropertyChanged([CallerMemberName] string propertyName = null)
{
    base.OnPropertyChanged(propertyName);

    if (propertyName == WindowProperty.PropertyName)
        Window?.SetBinding(Window.TitleProperty, new Binding("CurrentItem.Title", source: this) { StringFormat = ".NET MAUI {0}" });
}

If you want a fixed title for the app, then this is also possible if you put this in your app code-behind (App.xaml.cs):

protected override Window CreateWindow(IActivationState activationState)
{
    var window = base.CreateWindow(activationState);
    window.Title = ".NET MAUI";
    return window;
}

[ghost]

Hi @PureWeen. We have added the "s/needs-info" label to this issue, which indicates that we have an open question for you before we can take further action. This issue will be closed automatically in 7 days if we do not hear back from you by then - please feel free to re-open it if you come back to this issue after that time.

[mattleibow]

@PureWeen is this still a thing? I feel like Window.Title now works and I am not sure if Shell.Title going to Window.Title is 100% desired as most apps don't flip title based on the current page... But maybe I am wrong. I have a workaround that may be a feature?

[PureWeen]

@PureWeen is this still a thing? I feel like Window.Title now works and I am not sure if Shell.Title going to Window.Title is 100% desired as most apps don't flip title based on the current page... But maybe I am wrong. I have a workaround that may be a feature?

You only have one Shell for your window so the Shell and the window are synonymous. The Title for the Page itself will be set on the ShellContent or the Page itself.

[PureWeen]

Seems the Title is not bubbled up, but thisis also partially by design as some apps do not wish the APP title to match the current page.

Yes, it is? Maybe I'm not following you here though but the Title is definitely bubbled up.
Yea, the property isn't bubbled up through the Bindable Properties. The Title is exposed through the ITitledElement core interface which reads from shell if it's set otherwise it reads from the window.

https://github.com/dotnet/maui/blob/main/src/Controls/src/Core/HandlerImpl/Window/Window.Impl.cs#L107

Here's the watching of the property change

https://github.com/dotnet/maui/blob/main/src/Controls/src/Core/HandlerImpl/Window/Window.Impl.cs#L635-L639

We don't really expose Window in any simplified way currently, so if you're not using shell setting the app title is confusing.
I assume some day we'll include a Window.xaml file with our templated projects and stop using App.MainPage = new MainPage()

[PureWeen]

most apps don't flip title based on the current page...

They usually do based on context and for accessibility reasons. Ideally your window title will append/include the context of where you are in an app, that way if you have multiple windows, or you have multiple instances of an app, the screen reader + window.title will give your window context.

For example, every window of your browser bases the title on the currently visible page.

Notepad will prefix the filename.

The Window.Title should probably be an attached property like how we do NavigationPage.Title