Auto menu expanding not working for MenuItems with ItemSource binding

[madenaras]

Auto opening the submenu is not working for MenuItems with ItemsSource bindings.

Having a DropDownButton with ItemsSource binding, that binds to a collection of objects that themselves contain collections of objects (like "Dropdown (auto close on click) g" button, but with ItemsSource binding, not manually adding MenuItem elements in XAML).

Adapting the style with

                        <Fluent:DropDownButton.ItemContainerStyle>
                            <Style TargetType="Fluent:MenuItem" BasedOn="{StaticResource Fluent.Ribbon.Styles.MenuItem}">
                                <Setter Value="{Binding Name}" Property="Header"/>
                                <Setter Value="{Binding MoreStuff}" Property="ItemsSource"/>
                            </Style>
                        </Fluent:DropDownButton.ItemContainerStyle>

Problem is pinpointed to File : Fluent.Ribbon\Controls\MenuItem.cs, line 434 and line
450: this.Parent is null.

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Environment

• Fluent.Ribbon __v7.0.0
• Windows 7/10
• .NET Framework 4.61

[batzen]

Could you create a small repro app? I currently don't have enough time to do this myself.

[madenaras]

Hello,

Please find a demo app here:
https://github.com/madenaras/FluentTest

Thanks!