Tooltip ControlTemplate

I decided to do some artistic thingy to my tooltips:

<Style TargetType="{x:Type ToolTip}">
<Setter Property="ToolTip.Background">
<Setter.Value>
<RadialGradientBrush Center="0,0" RadiusX="0.9" RadiusY="0.9"
GradientOrigin="0,0" >
<RadialGradientBrush.GradientStops>
<GradientStop Color="LightBlue" Offset="1" />
<GradientStop Color="White" Offset="0" />
</RadialGradientBrush.GradientStops>
</RadialGradientBrush>
</Setter.Value>
</Setter>
<Setter Property="ToolTip.Template">
<Setter.Value>
<ControlTemplate>
<Grid Background="{TemplateBinding Property=Control.Background}">
<ContentPresenter Content="{TemplateBinding
Property=ContentControl.Content}"
Margin="{TemplateBinding
Property=Control.Padding}"/>
</Grid>
</ControlTemplate>
</Setter.Value>
</Setter>
</Style>

Lo and behold: a nice gradient to all my tooltips! But... why does the
tooltip still have a shadow? I thought that Control Template replaced all
layout...

Erno

After some experiments:

It is not a shadow! A black rectangular form is reserved as a kind of panel
on which the tiptip is drawn.

Does anybody know how to make that rectangle transparent (or make it go
away)?

Erno

"Erno" <no-spam> wrote in message
news:urZw80zJGHA.2064@TK2MSFTNGP09.phx.gbl...
>I decided to do some artistic thingy to my tooltips:
>
> <Style TargetType="{x:Type ToolTip}">
> <Setter Property="ToolTip.Background">
> <Setter.Value>
> <RadialGradientBrush Center="0,0" RadiusX="0.9" RadiusY="0.9"
> GradientOrigin="0,0" >
> <RadialGradientBrush.GradientStops>
> <GradientStop Color="LightBlue" Offset="1" />
> <GradientStop Color="White" Offset="0" />
> </RadialGradientBrush.GradientStops>
> </RadialGradientBrush>
> </Setter.Value>
> </Setter>
> <Setter Property="ToolTip.Template">
> <Setter.Value>
> <ControlTemplate>
> <Grid Background="{TemplateBinding Property=Control.Background}">
> <ContentPresenter Content="{TemplateBinding
> Property=ContentControl.Content}"
> Margin="{TemplateBinding
> Property=Control.Padding}"/>
> </Grid>
> </ControlTemplate>
> </Setter.Value>
> </Setter>
> </Style>
>
> Lo and behold: a nice gradient to all my tooltips! But... why does the
> tooltip still have a shadow? I thought that Control Template replaced all
> layout...
>
> Erno
>