In Stylet IoC, is it possible to bind a set of types to singleton scope automatically?

[mwdpb]

For example, my shellview managers a dozens of viewmodels which are all sub-classes of Screen, all those viewmodels needs to be singleton, I could explicitly configure them as

builder.Bind<Page1ViewModel>().ToSelf().InSingletonScope();
builder.Bind<Page2ViewModel>().ToSelf().InSingletonScope();
...
builder.Bind<Page12ViewModel>().ToSelf().InSingletonScope();

It works, but is not elegant. Is it possible to instruct IoC to use singleton scope for all classes that is derived from base class Screen?

Another questions is if Stylet IoC can do lazy instantiation? Use the above example, the shellview manages a dozens of tabs (each tab corresponds to one viewmodel and only one tab will be active at a time) and some of tabs are computation intensive while some of tabs are merely user settings. To have good user experience, I don't want all of the viewmodels being instantiated when I launch shellview since I might only need work with user settings tabs. What's the best way to handle such situations?

[mwdpb]

For the second question, I think I got the answer by going over your excellent manual N+1 times :)

public interface IViewModelFactory
{
    Page1ViewModel GetPage1ViewModel();
    Page2ViewModel GetPage1ViewModel();
...
    Page12ViewModel GetPage1ViewModel();
}

And then pass IViewModelFactory as a shellviewmodel constructor parameter, I can then use the following statement in shellviewmodel to activate

this.ActivateItem(this.viewModelFactory.GetHomeViewModel());

Just want to say that the more I used your framework, the more "wow"s I shouted! Thank you so much for your great work!

[canton7]

Is it possible to instruct IoC to use singleton scope for all classes that is derived from base class Screen?

Nothing built in, but it's pretty easy with reflection.

foreach (var type in someAssembly.GetTypes().Where(x => typeof(Screen).IsAssginableFrom(x)))
{
    builder.Bind(type).ToSelf().InSingletonScope();
}

Just want to say that the more I used your framework, the more "wow"s I shouted! Thank you so much for your great work!

Thanks!