Prism 4 Splash Screen with MEF Loader

Question

I have a prism 4 application using the MEF bootloader. I have implemented a screensaver from the bootloader and I want to provide the user with information about the module (as they load) when the module manager loads the application / modules.

I think I need to subscribe to the LoadModuleCompleted event in the module manager. I cannot do this because when I decide the module manager with the container in the MEF boot block, the PRISM framework calls OnImportsSatisfied, which loads all the modules. (Too late since I want to listen to this).

How to display a popup with a progress bar displaying module information / progress?

Many thanks!

Answer 1

If you manage the components that are imported into your project, you can implement IPartImportsSatisfiedNotification for each of them and tell them your own progress in any imported progress monitor class:

 public interface IProgressMonitor { void ReportComposed(Type type); } [Export(typeof(IProgressMonitor))] public class ProgressMonitor : IProgressMonitor { public ProgressMonitor() { var loadHeuristic = this.GetPreviousLoadProgress(); if (loadHeuristic == null) { // Never been loaded before, so it unclear how long it will take // Set indeterminate progress bar. } else { // Use previous load times to estimate progress. _loadHeuristic = loadHeuristic; _progress = 0; } } public void ReportComposed(Type type) { if (_loadHeuristic != null) { this.IncrementProgress(); } } } [Export] public class FooExport : IPartImportsSatisfiedNotification { [Import] internal IProgressMonitor ProgressMonitor { get; set; } public void OnImportsSatisfied() { this.ProgressMonitor.ReportComposed(typeof(FooExport)); } }