<DataTrigger Binding="{Binding Value}" Value="1">
                        <Setter Property="Content">
                                Value="{Binding RelativeSource={RelativeSource Mode=FindAncestor, AncestorType={x:Type Window}}, Path=DataContext.TestData}" />
                        </Setter>
                        <Setter Property="ContentTemplate">
                            <Setter.Value>
                                <DataTemplate>
                                    <Button Background="Aquamarine" Content="{Binding}" />
                                </DataTemplate>
                            </Setter.Value>
                        </Setter>
                    </DataTrigger>