overview

Z-depth is the distance between two surfaces on the z-axis. It illustrates how close an object is to the viewer.

Shadows also express depth and visual hierarchy.

shadow apis

ThemeShadow

• Can be applied to any XAML element.
• Applies shadows to elements based on a z-depth value.
• Built in to common controls at 32px depth.

ThemeShadow in Popups

To apply to an element in a Popup, apply a ThemeShadow to the element’s Shadow property then elevate the element from others behind it by using the Z component of the Translation property:

<Popup>
    <Rectangle x:Name="PopupRectangle" Fill="Lavender" Height="48" Width="96">
        <Rectangle.Shadow>
            <ThemeShadow />
        </Rectangle.Shadow>
    </Rectangle>
</Popup>

// Elevate the rectangle by 32px
PopupRectangle.Translation += new Vector3(0, 0, 32);

Automatic ThemeShadow on Flyout Controls

Controls based on Flyout, DatePickerFlyout, MenuFlyout, or TimePickerFlyout automatically use ThemeShadow to caste a shadow.

This can be disabled:

<Flyout>
    <Flyout.FlyoutPresenterStyle>
        <Style TargetType="FlyoutPresenter">
            <Setter Property="IsDefaultShadowEnabled" Value="False" />
        </Style>
    </Flyout.FlyoutPresenterStyle>
</Flyout>

see also

DropShadow