I'm not sure how to go about this, but I created a custom Panel `FooPanel`. I want my FooPanel to force all the children to fit within a size that is predetermined by the panel (that way they are uniform). I know about `UniformGrid` but I also have some other stuff going into it.

I'm not sure how to force the children to fit within the box I tell them to.

---

**Child.xaml:**

```
<Style TargetType="{x:Type l:FooChild}">
    <Setter Property="FocusVisualStyle" Value="{x:Null}" />
    <Setter Property="Padding" Value="12,2,12,2" />
    <Setter Property="Foreground" Value="Black" />
    <Setter Property="Background" Value="White" />
    <Setter Property="HorizontalContentAlignment" Value="Stretch" />
    <Setter Property="VerticalContentAlignment" Value="Stretch" />
    <Setter Property="Template">
        <Setter.Value>
            <ControlTemplate TargetType="{x:Type l:FooChild}">
                <Border x:Name="ChromeBorder" BorderBrush="{TemplateBinding BorderBrush}" BorderThickness="{TemplateBinding BorderThickness}" Background="{TemplateBinding Background}" SnapsToDevicePixels="true">
                    <ContentPresenter ContentSource="Header" Margin="{TemplateBinding Padding}" RecognizesAccessKey="True" SnapsToDevicePixels="{TemplateBinding SnapsToDevicePixels}"
                                      HorizontalAlignment="{Binding HorizontalContentAlignment, RelativeSource={RelativeSource AncestorType={x:Type ItemsControl}}}"
                                      VerticalAlignment="{Binding VerticalContentAlignment, RelativeSource={RelativeSource AncestorType={x:Type ItemsControl}}}"
                                      />
                </Border>
            </ControlTemplate>
        </Setter.Value>
    </Setter>
</Style>

```