I'm not sure if I understand correctly, but if you are using a Style
you should not have to use a DataTrigger
or RelativeSource={RelativeSource Self}}"
to access SelectedValue
, you should be able to access via a Trigger
using the Property
<Style TargetType="ComboBox">
<Style.Triggers>
<Trigger Property="SelectedValue" Value="DAW">
<Setter Property="ToolTip" Value="abc"/>
</Trigger>
<Trigger Property="SelectedValue" Value="generic">
<Setter Property="ToolTip" Value="def"/>
</Trigger>
</Style.Triggers>
</Style>