VirtualizingLayoutContext Class

Definition

Namespace:

Microsoft.UI.Xaml.Controls

Represents the base class for layout context types that support virtualization.

/// [Windows.Foundation.Metadata.MarshalingBehavior(Windows.Foundation.Metadata.MarshalingType.Agile)]
/// [Windows.Foundation.Metadata.Threading(Windows.Foundation.Metadata.ThreadingModel.Both)]
/// [Windows.Foundation.Metadata.ContractVersion(Microsoft.UI.Xaml.XamlContract, 65536)]
class VirtualizingLayoutContext : LayoutContext

[Windows.Foundation.Metadata.MarshalingBehavior(Windows.Foundation.Metadata.MarshalingType.Agile)]
[Windows.Foundation.Metadata.Threading(Windows.Foundation.Metadata.ThreadingModel.Both)]
[Windows.Foundation.Metadata.ContractVersion(typeof(Microsoft.UI.Xaml.XamlContract), 65536)]
public class VirtualizingLayoutContext : LayoutContext

Public Class VirtualizingLayoutContext
Inherits LayoutContext

Inheritance

Object IInspectable DependencyObject LayoutContext VirtualizingLayoutContext

Attributes

MarshalingBehaviorAttribute ThreadingAttribute ContractVersionAttribute

Constructors

VirtualizingLayoutContext()

Initializes a new instance of the VirtualizingLayoutContext class.

Properties

Dispatcher	Always returns null in a Windows App SDK app. Use DispatcherQueue instead. (Inherited from DependencyObject)
DispatcherQueue	Gets the DispatcherQueue that this object is associated with. The DispatcherQueue 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)
ItemCount	Gets the number of items in the data.
LayoutOrigin	Gets or sets the origin point for the estimated content size.
LayoutOriginCore	Implements the behavior of LayoutOrigin in a derived or custom VirtualizingLayoutContext.
LayoutState	Gets or sets an object that represents the state of a layout. (Inherited from LayoutContext)
LayoutStateCore	Implements the behavior of LayoutState in a derived or custom LayoutContext. (Inherited from LayoutContext)
RealizationRect	Gets an area that represents the viewport and buffer that the layout should fill with realized elements.
RecommendedAnchorIndex	Gets the recommended index from which to start the generation and layout of elements.
RecommendedAnchorIndexCore	Implements the behavior for getting the return value of RecommendedAnchorIndex in a derived or custom VirtualizingLayoutContext.
VisibleRect	Gets the visible viewport rectangle within the FrameworkElement associated with the Layout.

Methods

ClearValue(DependencyProperty)	Clears the local value of a dependency property. (Inherited from DependencyObject)
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)
GetItemAt(Int32)	Retrieves the data item in the source found at the specified index.
GetItemAtCore(Int32)	When implemented in a derived class, retrieves the data item in the source found at the specified index.
GetOrCreateElementAt(Int32)	Retrieves a UIElement that represents the data item in the source found at the specified index. By default, if an element already exists, it is returned; otherwise, a new element is created.
GetOrCreateElementAt(Int32, ElementRealizationOptions)	Retrieves a UIElement that represents the data item in the source found at the specified index using the specified options.
GetOrCreateElementAtCore(Int32, ElementRealizationOptions)	When implemented in a derived class, retrieves a UIElement that represents the data item in the source found at the specified index using the specified options.
GetValue(DependencyProperty)	Returns the current effective value of a dependency property from a DependencyObject. (Inherited from DependencyObject)
ItemCountCore()	When implemented in a derived class, retrieves the number of items in the data.
ReadLocalValue(DependencyProperty)	Returns the local value of a dependency property, if a local value is set. (Inherited from DependencyObject)
RealizationRectCore()	When implemented in a derived class, retrieves an area that represents the viewport and buffer that the layout should fill with realized elements.
RecycleElement(UIElement)	Clears the specified UIElement and allows it to be either re-used or released.
RecycleElementCore(UIElement)	When implemented in a derived class, clears the specified UIElement and allows it to be either re-used or released.
RegisterPropertyChangedCallback(DependencyProperty, DependencyPropertyChangedCallback)	Registers a notification function for listening to changes to a specific DependencyProperty on this DependencyObject instance. (Inherited from DependencyObject)
SetValue(DependencyProperty, Object)	Sets the local value of a dependency property on a DependencyObject. (Inherited from DependencyObject)
UnregisterPropertyChangedCallback(DependencyProperty, Int64)	Cancels a change notification that was previously registered by calling RegisterPropertyChangedCallback. (Inherited from DependencyObject)
VisibleRectCore()	Provides the value that is assigned to the VisibleRect property.