ResponsiveExtension

The ResponsiveExtension class is a markup extension that enables the customization of UIElement properties based on screen size. This functionality provides a dynamic and responsive user interface experience.

Platform limitation (UWP-desktop)

ResponsiveExtension relies on MarkupExtension.ProvideValue(IXamlServiceProvider) to find the target control and property for continuous value updates, and to obtain the property type to apply automatic type conversion, as its value properties are parsed as string by the XAML engine. Since this overload is a recent addition exclusive to WinUI, UWP projects targeting Windows won't have access to these features. Uno UWP projects targeting non-Windows platforms do not face this limitation. However, the Windows app may crash or present unexpected behavior if you attempt to use this markup on a non-string property.

<Border Background="{utu:Responsive Narrow=Red, Wide=Blue}"
        Tag="This will not work on Uwp for windows" />

You can workaround this by declaring the values as resources and using {StaticResource} to refer to them:

<Page.Resources>
    <SolidColorBrush x:Key="RedBrush">Red</SolidColorBrush>
    <SolidColorBrush x:Key="BlueBrush">Blue</SolidColorBrush>
...

<Border Background="{utu:Responsive Narrow={StaticResource RedBrush},
                                    Wide={StaticResource BlueBrush}}" />

Properties

Property Type Description
Narrowest object Value to be used when the screen size is at its narrowest.
Narrow object Value to be used when the screen size is narrow.
Normal object Value to be used when the screen size is normal.
Wide object Value to be used when the screen size is wide.
Widest object Value to be used when the screen size is at its widest.
Layout ResponsiveLayout Overrides the screen size thresholds/breakpoints.

ResponsiveLayout

Provides the ability to override the default breakpoints (i.e., the window widths at which the value changes) for the screen sizes. This is done using an instance of the ResponsiveLayout class.

Properties

Property Type Description
Narrowest double Default value is 150.
Narrow double Default value is 300.
Normal double Default value is 600.
Wide double Default value is 800.
Widest double Default value is 1080.

Resolution Logics

The layouts whose value(ResponsiveExtension) or template(ResponsiveView) is not provided are first discarded. From the remaining layouts, we look for the first layout whose breakpoint at met by the current screen width. If none are found, the first layout is return regardless of its breakpoint.

Below are the selected layout at different screen width if all layouts are provided:

Width Layout
149 Narrowest
150(Narrowest) Narrowest
151 Narrowest
299 Narrowest
300(Narrow) Narrow
301 Narrow
599 Narrow
600(Normal) Normal
601 Normal
799 Normal
800(Wide) Wide
801 Wide
1079 Wide
1080(Widest) Widest
1081 Widest

Here are the selected layout at different screen width if only Narrow and Wide are provided:

Width Layout
149 Narrow
150(Narrowest) Narrow
151 Narrow
299 Narrow
300(Narrow) Narrow
301 Narrow
599 Narrow
600(Normal) Narrow
601 Narrow
799 Narrow
800(Wide) Wide
801 Wide
1079 Wide
1080(Widest) Wide
1081 Wide

Usage

Tip

It is not necessary to define every template or layout breakpoint: Narrowest, Narrow, Normal, Wide, Widest. You can just define the bare minimum needed.

xmlns:utu="using:Uno.Toolkit.UI"
...

<TextBlock Background="{utu:Responsive Narrow=Red, Wide=Blue}" Text="Asd" />

Custom thresholds

xmlns:utu="using:Uno.Toolkit.UI"
...

<Page.Resources>
    <utu:ResponsiveLayout x:Key="CustomLayout"
                          Narrow="400"
                          Wide="800" />
</Page.Resources>
...

<TextBlock Text="{utu:Responsive Layout={StaticResource CustomLayout}, Narrow=Narrow, Wide=Wide}" />
Note

The ResponsiveLayout can also be provided from different locations. In the order of precedences, they are:

  • from the Layout property
  • in the property owner's parent .Resources with x:Key="DefaultResponsiveLayout", or the property owner's parent's parent's...
  • in Application.Resources with x:Key="DefaultResponsiveLayout"
  • from the hardcoded ResponsiveHelper.DefaultLayout which is defined as [150/300/600/800/1080]