MenuItems with ItemSource and nested MenuItem

[imadenis]

The new release includes the breaking change:

DropDownButton, SplitButton and ApplicationMenu don't generate MenuItem but ContentPresenter as containers.

This provides more flexibility and also fixes the nested MenuItem issues.

I adapted simple DropDownButtons to the changes, but for a DropDownButton that has a menu with nested items I could not find a way. As there is no concrete example for this breaking change, I have made a repo to demonstrate the unexpected behavior, having menu items with the arrow but no subsequent menu opening.

Example found under Tests -> Dropdown (auto close on click)

https://github.com/imadenis/Fluent.Ribbon.Demo

[batzen]

Hi there.
If you want to skip generation of ContentPresenter you have to use UseItemContainerTemplate="true".
The following code solves your issue:

<Fluent:DropDownButton.Resources>
    <ItemContainerTemplate x:Key="{ItemContainerTemplateKey {x:Type viewModels:MenuItemViewModel}}">
        <Fluent:MenuItem Header="{Binding Header}" 
                         IsCheckable="{Binding IsCheckable}"
                         IsChecked="{Binding IsChecked}"
                         ItemsSource="{Binding Children}"
                         UsesItemContainerTemplate="True" />
    </ItemContainerTemplate>
</Fluent:DropDownButton.Resources>

Please do not use DataType on the ItemContainerTemplate. The generation of that is somewhat broken in WPF itself.

I agree that it would be a bit easier if one could simply use ItemTemplate, in combination with UsesItemContainerTemplate of course.
Will add that way in the next version.

[batzen]

Thanks for the test code.
Added it to the showcase application.

[imadenis]

Thank you !