- 1 year ago
UWP How to get a NavigationView inner shadow projected by the content pane?
In a UWP (Universal Windows Platform) app, the NavigationView
control does not provide an out-of-the-box option to add an inner shadow projected by the content pane. However, you can achieve this effect by customizing the control's template. Here's a general outline of how you can do it:
Start by creating a copy of the default template for the
NavigationView
. You can find the default template in the UWP XAML Controls Gallery sample project provided by Microsoft.Locate the
ContentGrid
element within theNavigationView
template. This is the main container that holds the content pane.Add a
Border
element as a child of theContentGrid
element. ThisBorder
element will act as a container for the inner shadow.Apply a
DropShadowPanel
effect to theBorder
element. TheDropShadowPanel
provides the ability to add a shadow effect to its content.Place the original content of the
ContentGrid
(e.g.,ScrollViewer
,Grid
, etc.) as a child of theBorder
element.
Here's an example snippet that demonstrates the modification:
xml<Grid>
<NavigationView x:Name="NavView">
<NavigationView.Template>
<ControlTemplate TargetType="NavigationView">
<Grid>
<!-- ...Other elements... -->
<Grid x:Name="ContentGrid" Background="{TemplateBinding Background}" Grid.Row="1">
<Border>
<Border.Clip>
<RectangleGeometry Rect="0,0,{TemplateBinding ActualWidth},{TemplateBinding ActualHeight}" />
</Border.Clip>
<controls:DropShadowPanel ShadowOpacity="0.6" ShadowColor="Black" BlurRadius="8" OffsetX="0" OffsetY="8">
<!-- Original content of ContentGrid -->
</controls:DropShadowPanel>
</Border>
</Grid>
</Grid>
</ControlTemplate>
</NavigationView.Template>
</NavigationView>
</Grid>
In the example above, a DropShadowPanel
is added as a child of the Border
element within the ContentGrid
. The DropShadowPanel
is configured with a shadow opacity of 0.6
, a black shadow color, a blur radius of 8
, and an offset of 0
in the X-axis and 8
in the Y-axis. Adjust these values to achieve the desired shadow effect.
By customizing the NavigationView
template in this manner, you can create an inner shadow effect projected by the content pane. Remember to update the other parts of the template as necessary to maintain the desired appearance and behavior of the NavigationView
.
Note that modifying control templates requires careful consideration of accessibility, responsiveness, and other design principles. It's recommended to thoroughly test and validate the custom template to ensure it meets your app's requirements and works well across different device sizes and orientations.