AdaptiveTrigger AdaptiveTrigger AdaptiveTrigger Class

Definition

Represents a declarative rule that applies visual states based on window properties.

public : class AdaptiveTrigger : StateTriggerBase, IAdaptiveTrigger
public class AdaptiveTrigger : StateTriggerBase, IAdaptiveTrigger
Public Class AdaptiveTrigger Inherits StateTriggerBase Implements IAdaptiveTrigger
<AdaptiveTrigger .../>
Inheritance
Attributes
Windows 10 requirements
Device family
Windows 10 (introduced v10.0.10240.0)
API contract
Windows.Foundation.UniversalApiContract (introduced v1)

Examples

This example shows how to use the StateTriggers property with an AdaptiveTrigger to create a declarative rule in XAML markup based on window size. By default, the StackPanel orientation is Vertical. When the window width is >= 720 effective pixels, the VisualState change is triggered, and the StackPanel orientation is changed to Horizontal.

<Page>
    <Grid Background="{ThemeResource ApplicationPageBackgroundThemeBrush}">
        <VisualStateManager.VisualStateGroups>
            <VisualStateGroup>
                <VisualState>
                    <VisualState.StateTriggers>
                    <!--VisualState to be triggered when window width is >=720 effective pixels.-->
                        <AdaptiveTrigger MinWindowWidth="720"/>
                    </VisualState.StateTriggers>

                    <VisualState.Setters>
                        <Setter Target="myPanel.Orientation" Value="Horizontal"/>
                    </VisualState.Setters>
                </VisualState>
            </VisualStateGroup>
        </VisualStateManager.VisualStateGroups>
        <StackPanel x:Name="myPanel" Orientation="Vertical">
            <TextBlock Text="This is a block of text. It is text block 1. " 
                       Style="{ThemeResource BodyTextBlockStyle}"/>
            <TextBlock Text="This is a block of text. It is text block 2. " 
                       Style="{ThemeResource BodyTextBlockStyle}"/>
            <TextBlock Text="This is a block of text. It is text block 3. " 
                       Style="{ThemeResource BodyTextBlockStyle}"/>
        </StackPanel>
    </Grid>
</Page>

Remarks

Use AdaptiveTrigger s to create rules that automatically trigger a VisualState change when the window is a specified height or width. When you use AdaptiveTrigger s in your XAML markup, you don't need to handle the Window.SizeChanged event and call VisualStateManager.GoToState in your code. Also, when you use AdaptiveTrigger in your VisualStateManager, you can see the effects of these adaptive changes directly on the XAML design surface in Microsoft Visual Studio.

You can use the MinWindowWidth and MinWindowHeight properties either independently or in conjunction with each other. This XAML shows an example of using both properties together. The trigger indicates that the corresponding VisualState is to be applied when the current window width is >= 720 effective pixels AND the current window height is >= 900 effective pixels.

<AdaptiveTrigger MinWindowWidth="720" MinWindowHeight="900"/>

For more examples, see the XAML Responsive Techniques sample.

Constructors

AdaptiveTrigger() AdaptiveTrigger() AdaptiveTrigger()

Initializes a new instance of the AdaptiveTrigger class

public : AdaptiveTrigger()
public AdaptiveTrigger()
Public Sub New()

Properties

Dispatcher Dispatcher Dispatcher

Gets the CoreDispatcher that this object is associated with. The CoreDispatcher represents a facility that can access the DependencyObject on the UI thread even if the code is initiated by a non-UI thread.

(Inherited from DependencyObject)

MinWindowHeight MinWindowHeight MinWindowHeight

Gets or sets the minimum window height at which the VisualState should be applied.

public : double MinWindowHeight { get; set; }
public double MinWindowHeight { get; set; }
Public ReadWrite Property MinWindowHeight As double
<AdaptiveTrigger MinWindowHeight="double" .../>
Value
double double double

The minimum window height (in effective pixels) at which the VisualState should be applied.

MinWindowHeightProperty MinWindowHeightProperty MinWindowHeightProperty

Identifies the MinWindowHeight dependency property.

public : static DependencyProperty MinWindowHeightProperty { get; }
public static DependencyProperty MinWindowHeightProperty { get; }
Public Static ReadOnly Property MinWindowHeightProperty As DependencyProperty
Value
DependencyProperty DependencyProperty DependencyProperty

The identifier for the MinWindowHeight dependency property.

Remarks

This property is only an identifier for the property system, and isn't used in most app scenarios. In most cases you set the MinWindowHeight dependency property in XAML and won't need this identifier.

To access the MinWindowHeight dependency property in code, you can use the dependency property system, calling either GetValue or SetValue and passing AdaptiveTrigger.MinWindowHeightProperty as the dependency property identifier.

See Also

MinWindowWidth MinWindowWidth MinWindowWidth

Gets or sets the minimum window width at which the VisualState should be applied.

public : double MinWindowWidth { get; set; }
public double MinWindowWidth { get; set; }
Public ReadWrite Property MinWindowWidth As double
<AdaptiveTrigger MinWindowWidth="double" .../>
Value
double double double

The minimum window width (in effective pixels) at which the VisualState should be applied.

MinWindowWidthProperty MinWindowWidthProperty MinWindowWidthProperty

Identifies the MinWindowWidth dependency property.

public : static DependencyProperty MinWindowWidthProperty { get; }
public static DependencyProperty MinWindowWidthProperty { get; }
Public Static ReadOnly Property MinWindowWidthProperty As DependencyProperty
Value
DependencyProperty DependencyProperty DependencyProperty

The identifier for the MinWindowWidth dependency property.

Remarks

This property is only an identifier for the property system, and isn't used in most app scenarios. In most cases you set the MinWindowWidth dependency property in XAML and won't need this identifier.

To access the MinWindowWidth dependency property in code, you can use the dependency property system, calling either GetValue or SetValue and passing AdaptiveTrigger.MinWindowWidthProperty as the dependency property identifier.

See Also

Methods

ClearValue(DependencyProperty) ClearValue(DependencyProperty) ClearValue(DependencyProperty)

Clears the local value of a dependency property.

(Inherited from DependencyObject)

GetAnimationBaseValue(DependencyProperty) GetAnimationBaseValue(DependencyProperty) GetAnimationBaseValue(DependencyProperty)

Returns any base value established for a dependency property, which would apply in cases where an animation is not active.

(Inherited from DependencyObject)

GetValue(DependencyProperty) GetValue(DependencyProperty) GetValue(DependencyProperty)

Returns the current effective value of a dependency property from a DependencyObject.

(Inherited from DependencyObject)

ReadLocalValue(DependencyProperty) ReadLocalValue(DependencyProperty) ReadLocalValue(DependencyProperty)

Returns the local value of a dependency property, if a local value is set.

(Inherited from DependencyObject)

RegisterPropertyChangedCallback(DependencyProperty,DependencyPropertyChangedCallback) RegisterPropertyChangedCallback(DependencyProperty,DependencyPropertyChangedCallback) RegisterPropertyChangedCallback(DependencyProperty,DependencyPropertyChangedCallback)

Registers a notification function for listening to changes to a specific DependencyProperty on this DependencyObject instance.

(Inherited from DependencyObject)

SetActive(Boolean) SetActive(Boolean) SetActive(Boolean)

Sets the value that indicates whether the state trigger is active.

(Inherited from StateTriggerBase)

SetValue(DependencyProperty,Object) SetValue(DependencyProperty,Object) SetValue(DependencyProperty,Object)

Sets the local value of a dependency property on a DependencyObject.

(Inherited from DependencyObject)

UnregisterPropertyChangedCallback(DependencyProperty,Int64) UnregisterPropertyChangedCallback(DependencyProperty,Int64) UnregisterPropertyChangedCallback(DependencyProperty,Int64)

Cancels a change notification that was previously registered by calling RegisterPropertyChangedCallback.

(Inherited from DependencyObject)

See Also