telerik RadDocking vs. Prism problems

[Joe]

telerik RadDocking vs. Prism problems

 

The telerik RadDocking vs. Prism problems are a “show stopper”.  I have invested over fifty hours and cannot get Prism ViewInjection (regionManager.RequestNavigate) to work with telerik RadPanes.

 

Injected telerik RadPane views appear when they are first injected, but the Prism ConfirmNavigationRequest methods are only ever called on the first Injected View.  The same methods on the other ones never fire, and no existing view ever becomes the top view when navigating back.  The top view is ALWAYS the last view injected.  I tried getting a reference from the view model to the view to force the view to the top layer (Bad developer - I know!), but I cannot get a handle to the telerik RadPane views from my view models because they are registered without a Name as a result of using MEF and Prism RequestNavigate.

 

I expected telerik to give me productivity gains, but right now telerik has been a huge drain on my productivity.  In a few more hours I am going to tell my client I cannot get the product built using telerik RadDocking.

We are using VS2010 SP1, .NET 4, WPF, telerik Apr 19, 2011 Q1 2011 SP1 (version 2011.1.0419), Prism 4.

 

Sincerely, Joe

 

ShellView.xaml:

<telerik:RadDocking Padding="0">

  <!-- NavigationRegion -->

  <telerik:RadSplitContainer InitialPosition="DockedLeft">

    <telerik:RadPaneGroup prism:RegionManager.RegionName="{x:Static inf:RegionNames.NavigationRegion}"

    IsManipulationEnabled="False"/>

  </telerik:RadSplitContainer>

  <!-- ActionsPaneRegion -->

  <telerik:RadSplitContainer InitialPosition="DockedRight">

    <telerik:RadPaneGroup prism:RegionManager.RegionName="{x:Static inf:RegionNames.ActionsPaneRegion}"/>

  </telerik:RadSplitContainer>

  <!-- WorkAreaRegion -->

  <telerik:RadSplitContainer InitialPosition="DockedTop" telerik:DockingPanel.InitialSize="556,717">

    <telerik:RadPaneGroup prism:RegionManager.RegionName="{x:Static inf:RegionNames.WorkAreaRegion}" 

    IsManipulationEnabled="False"/>

  </telerik:RadSplitContainer>

</telerik:RadDocking>

 

NavigationViewModel.cs:

workAreaRegion.Context = selectedTreeViewItem;

UriQuery query = new UriQuery();

query.Add("Action", "Edit Level");

regionManager.RequestNavigate

(

  RegionNames.WorkAreaRegion,

  new Uri(ViewNames.MarketPropertiesView + query.ToString(), UriKind.Relative),

  a => { }

);

 

WorkAreaViewModel.cs:

#region ConfirmNavigationRequest

public void ConfirmNavigationRequest(Microsoft.Practices.Prism.Regions.NavigationContext navigationContext, 

  System.Action<bool> continuationCallback)

{

  // Use this interface if you want to prevent the user from navigating 

  // away from a view before the view is completed. 

  continuationCallback(true);

}

public bool IsNavigationTarget(Microsoft.Practices.Prism.Regions.NavigationContext navigationContext)

{

  // A value of true indicates that this View/ViewModel is the one to handle this navigation request. 

  return true;

}

public void OnNavigatedFrom(Microsoft.Practices.Prism.Regions.NavigationContext navigationContext)

{

  // Use this event for logic BEFORE navigation leaves this View/ViewModel 

  // For example, record which UI control has focus so that when the view is navigated back to,  

  // focus can be restored to the UI control that previously had focus. 

  return;

}

public void OnNavigatedTo(Microsoft.Practices.Prism.Regions.NavigationContext navigationContext)

{

  // Use this event to initialize/refresh this View/ViewModel. 

  // Use this method to initiate loading of data and to restore focus to the  

  // UI Control that had focus when the object was navigated away from. 

  if (isFirstTime == true)

    isFirstTime = false;

  // Get passed NavigationContext URI parameters. 

  if (navigationContext != null)

    Action = navigationContext.Parameters["Action"];

  return;

}

#endregion ConfirmNavigationRequest

 

[Joe]

By the way, I tried the 262639_PRISM-MEF-WPF solution.
It includes the infamous RadPaneGroupRegionAdapter.  Funny though, the software never calls the RadPaneGroupRegionAdapter.  The RadPaneGroupRegionAdapter does have an [Export], but there is no matching [Import] anywhere in the solution.  Breakpoints in the RadPaneGroupRegionAdapter never are hit.  And the sample does not use RequestNavigate, so it is overly simple and did nothing to resolve the Prism ViewInjection problems.

Laughably, the PRISM-MEF-WPF solution also uses Unity to register the RadPaneGroupRegionAdapter.  I rewrote the offending line of code, but the adapter is never called and my application behavior is never changed.

protected override RegionAdapterMappings ConfigureRegionAdapterMappings() 
{ 
  var mappings = base.ConfigureRegionAdapterMappings();
  RadPaneGroupRegionAdapter radPaneGroupRegionAdapter =
    this.Container.GetExportedValue<RadPaneGroupRegionAdapter>("xxxx.Shell.Behaviors.RadPaneGroupRegionAdapter");
  mappings.RegisterMapping(typeof(RadPaneGroup), radPaneGroupRegionAdapter);
  return mappings; 
}

What I would really really like is an example of RadDocking using Prism, MEF and View Injection (RegionManager.RequestNavigate) with multiple injected views coming and going as the user navigates from another view.  It is actually a very common UI scenario.  Even if this is not a telerik issue, your telerik users will get a productivity boost if you can show them how to use your RadDocking to build out this common scenario.

Joe

[George]

Hello Joe,

Please, refer to the following forum thread where I just replied - http://www.telerik.com/community/forums/wpf/docking/raddocking-with-prism-4-mvvm-mefbootstrapper.aspx

Best wishes,
George
the Telerik team

[Yu]

Hi George,

Has the problem been solved with the using Prism 4 + MVVM + Raddocking control?

We ran into the the same scenario now with using the View Injection approach.

We can create the different view for the first time, and when we try to create the view second time with the same view name using

region.Activate(currentView), the view of RadnPany type is not bring to the front.

We already set the region manager manually to the RadPanGroup.

Any ideas?

[George]

Hello,

In order to activate a pane in the RadDocking control, I would suggest setting the RadDocking.ActivePane property. You could find attached a sample project that demonstrates the given scenario. Please, refer to it and let me know if this helps.

Kind regards,
George
the Telerik team