Underline text of PopupButton

Hi Ray,

You would need to use a custom DataTemplate and assign it to the PopupButton.ContentTemplate. In your DataTemplate you'd include a TextBlock with the TextDecorations set appropriately, and Text bound to the current context (i.e. "{Binding}").

Good. The Text does come through with {Binding}. How do I bind the DataTrigger to actually do the Underline. The following shows the title in the textblock and the binding for FontWeight works, but inside the ContentTemplate the IsUnderlined binding does not work.


<DataTemplate x:Key="fontItemsTemplate">
<shared:PopupButton
FontWeight="{Binding Weight}"
Content="{Binding Title}">
<shared:PopupButton.ContentTemplate>
<DataTemplate>
<TextBlock x:Name="title" Text="{Binding}"/>
<DataTemplate.Triggers>
<DataTrigger Binding="{Binding Path=IsUnderlined}" Value="True">
<Setter TargetName="title" Property="TextDecorations" Value="Underline" />
</DataTrigger>
</DataTemplate.Triggers>
</DataTemplate>
</shared:PopupButton.ContentTemplate>
</shared:PopupButton>
</DataTemplate>

[Modified at 06/29/2010 02:27 PM]

Hi Ray,

Your inner DataTemplate only has access to the "content" you pass down, which is Title. So you can't bind to IsUnderlined, because the DataContext is a string, not your custom object. You can either pass the custom object down like below, or use a RelativeSource to find the parent PopupButton then access it's DataContext.IsUnderlined.

That works perfectly. I now realize that I was asking a WPF binding question and the PopupButton is just following the rules of a well behaved control.