Prism 5.0 Interactivity Call Window

Question

I like the way Prism 5.0 Interactivity works, but it can just open UserControls and Panels and such inside a Window it creates. So since it cannot place a Window inside another Window you can't pass a view for it that has Window as the root element.

The problem is, when it places my UserControl inside the Window it created, the Window has not a MinWidth or MinHeight or a ResizeMode="NoResize" option to be selected, thus, the user interface becomes horrible.

Are there any ways to control the Window's properties so I can customize it as I want?

PS: It amazes me how a big and important company as Microsoft can release a Best Practices library with stuff missing like that.

---

As requested, here comes a code example:

In order to open a view in a new Window in Prism, you have to add this to the current view (the view that's going to invoke the creation of a new Window in it's ViewModel):

    <prism:InteractionRequestTrigger SourceObject="{Binding ItemSelectionRequest, Mode=OneWay}">
            <!-- This PopupWindowAction has a custom view defined. When this action is executed the view will be shown inside a new window -->
            <!-- Take into account that the view and its view model are created only once and will be reused each time the action is executed -->
            <prism:PopupWindowAction>
                <prism:PopupWindowAction.WindowContent>
                    <views:ItemSelectionView />
                </prism:PopupWindowAction.WindowContent>
            </prism:PopupWindowAction>
    </prism:InteractionRequestTrigger>

If you change this ItemSelectionView from a UserControl to a Window, you will get this exception:

Since basically Prism will try to place a Window inside a Window when it creates a new Window and a new ItemSelectionView and tries to put one inside the other...and Windows are suppose to be the root always, but in this case Window ItemSelectionView will be placed as a child of a new Window.

More information about how this works, please go to the link I posted.

---

For now I am using code behind to tweak the window, I check if this UserControl is the root of the Window, and only in that case I teak the Window's settings (this isn't ideal, but still isn't a violation of MVVM):

 private void OnLoaded(object sender, System.Windows.RoutedEventArgs e)
 {
    Window parentWindow = Window.GetWindow(this);
    if (parentWindow != null && parentWindow.Content == this)
    {
         parentWindow.ResizeMode = ResizeMode.NoResize;
         parentWindow.SizeToContent = SizeToContent.Height;
         parentWindow.MinHeight = this.MinHeight;                
         parentWindow.MinWidth = this.MinWidth;                
    }
}

Answer 1

There is a pretty simple solution.

Since the PopupWindowAction creates the wrapper windows as instances of the Window class, you can apply a default style to the type Window in your app.xaml.

<Application.Resources>
    <Style TargetType="{x:Type Rectangle}"/>
    <Style TargetType="{x:Type Window}">
        <Setter Property="Width" Value="500"/>
        <Setter Property="ResizeMode" Value="NoResize"/>
        <Setter Property="ShowInTaskbar" Value="False"/>
    </Style>
</Application.Resources>