InteractionRequest<Confirmation>: the focus stays on the clicked button - wpf

Question

Would anybody know how do I give the focus to the Cancel button of a Prism InteractionRequest?
What happens at the moment, is that given you've pressed enter on a button in a main window and the InteractionRequestTrigger fired, if you press enter again, you are in trouble as the focus stayed on the parent window and InteractionRequestTrigger fires a second time...
Thanks for your help

Answer 1

Focus on Confirmation dialog should be set automatically after firing the InteractionRequestTrigger.
You may find helpful the following State-Based Navigation Prism Quickstart:
State-Based Navigation
A Raise() method is invoked in the QuickStart for showing the InteractionRequest's dialog at ChatViewModel's SendMessage() method by setting the proper ViewModel context and its callback:
public IInteractionRequest SendMessageRequest
{
get { return this.sendMessageRequest; }
}
public void SendMessage()
{
var contact = this.CurrentContact;
this.sendMessageRequest.Raise(
new SendMessageViewModel(contact, this),
sendMessage =>
{
if (sendMessage.Result.HasValue && sendMessage.Result.Value)
{
this.SendingMessage = true;
this.chatService.SendMessage(
contact,
sendMessage.Message,
result =>
{
this.SendingMessage = false;
});
}
});
}
In addition, the ChatView detects the interaction request and the PopupChildWindowAction displays the SendMessageChildWindow pop-up window:
<prism:InteractionRequestTrigger SourceObject="{Binding SendMessageRequest}">
<prism:PopupChildWindowAction>
<prism:PopupChildWindowAction.ChildWindow>
<vs:SendMessageChildWindow/>
</prism:PopupChildWindowAction.ChildWindow>
</prism:PopupChildWindowAction>
</prism:InteractionRequestTrigger>
I hope this helps.

Answer 2

Ah! I should have marked my Popup as Focusable!