WrapGrid class (Windows)

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Positions child elements sequentially from left to right or top to bottom. When elements extend beyond the container edge, elements are positioned in the next row or column. Can only be used to display items in an ItemsControl.

Inheritance

Object
DependencyObject
UIElement
FrameworkElement
Panel
VirtualizingPanel
OrientedVirtualizingPanel
WrapGrid

Syntax

C++


public sealed class WrapGrid : OrientedVirtualizingPanel,
    IScrollSnapPointsInfo

XAML Object Element Usage


<WrapGrid ...>
  oneOrMoreUIElements
</WrapGrid>

XAML Values

oneOrMoreUIElements: One or more object elements that define the child elements this WrapGrid should contain and present. These should be elements that derive from UIElement. Elements placed here are added to the Children collection after being parsed.

Attributes

ActivatableAttribute(NTDDI_WIN8)
MarshalingBehaviorAttribute(Agile)
StaticAttribute(Windows.UI.Xaml.Controls.IWrapGridStatics, NTDDI_WIN8)
ThreadingAttribute(Both)
VersionAttribute(NTDDI_WIN8)
WebHostHiddenAttribute()

Members

The WrapGrid class has these types of members:

Constructors
Events
Methods
Properties

Constructors

The WrapGrid class has these constructors.

Constructor	Description
WrapGrid	Initializes a new instance of the WrapGrid class.

Events

The WrapGrid class has these events.

Event	Description
DoubleTapped	Occurs when an otherwise unhandled DoubleTap interaction occurs over the hit test area of this element. (Inherited from UIElement)
DragEnter	Occurs when the input system reports an underlying drag event with this element as the target. (Inherited from UIElement)
DragLeave	Occurs when the input system reports an underlying drag event with this element as the origin. (Inherited from UIElement)
DragOver	Occurs when the input system reports an underlying drag event with this element as the potential drop target. (Inherited from UIElement)
Drop	Occurs when the input system reports an underlying drop event with this element as the drop target. (Inherited from UIElement)
GotFocus	Occurs when a UIElement receives focus. (Inherited from UIElement)
Holding	Occurs when an otherwise unhandled Hold interaction occurs over the hit test area of this element. (Inherited from UIElement)
HorizontalSnapPointsChanged	Fires when the measurements for horizontal snap points change. (Inherited from OrientedVirtualizingPanel)
KeyDown	Occurs when a keyboard key is pressed while the UIElement has focus. (Inherited from UIElement)
KeyUp	Occurs when a keyboard key is released while the UIElement has focus. (Inherited from UIElement)
LayoutUpdated	Occurs when the layout of the visual tree changes. (Inherited from FrameworkElement)
Loaded	Occurs when a FrameworkElement has been constructed and added to the object tree, and is ready for interaction. (Inherited from FrameworkElement)
LostFocus	Occurs when a UIElement loses focus. (Inherited from UIElement)
ManipulationCompleted	Occurs when a manipulation on the UIElement is complete. (Inherited from UIElement)
ManipulationDelta	Occurs when the input device changes position during a manipulation. (Inherited from UIElement)
ManipulationInertiaStarting	Occurs when the input device loses contact with the UIElement object during a manipulation and inertia begins. (Inherited from UIElement)
ManipulationStarted	Occurs when an input device begins a manipulation on the UIElement. (Inherited from UIElement)
ManipulationStarting	Occurs when the manipulation processor is first created. (Inherited from UIElement)
PointerCanceled	Occurs when a pointer that made contact abnormally loses contact. (Inherited from UIElement)
PointerCaptureLost	Occurs when pointer capture previously held by this element moves to another element or elsewhere. (Inherited from UIElement)
PointerEntered	Occurs when a pointer enters the hit test area of this element. (Inherited from UIElement)
PointerExited	Occurs when a pointer leaves the hit test area of this element. (Inherited from UIElement)
PointerMoved	Occurs when a pointer moves while the pointer remains within the hit test area of this element. (Inherited from UIElement)
PointerPressed	Occurs when the pointer device initiates a Press action within this element. (Inherited from UIElement)
PointerReleased	Occurs when the pointer device that previously initiated a Press action is released, while within this element. (Inherited from UIElement)
PointerWheelChanged	Occurs when the delta value of a pointer wheel changes. (Inherited from UIElement)
RightTapped	Occurs when a right-tap input stimulus happens while the pointer is over the element. (Inherited from UIElement)
SizeChanged	Occurs when either the ActualHeight or the ActualWidth property changes value on a FrameworkElement. (Inherited from FrameworkElement)
Tapped	Occurs when an otherwise unhandled Tap interaction occurs over the hit test area of this element. (Inherited from UIElement)
Unloaded	Occurs when this object is no longer connected to the main object tree. (Inherited from FrameworkElement)
VerticalSnapPointsChanged	Fires when the measurements for vertical snap points change. (Inherited from OrientedVirtualizingPanel)

Methods

The WrapGrid class has these methods. It also inherits methods from the Object class.

Method	Description
AddHandler	Adds a routed event handler for a specified routed event, adding the handler to the handler collection on the current element. Specify handledEventsToo as true to have the provided handler be invoked even if the event is handled elsewhere. (Inherited from UIElement)
AddInternalChild	Adds the specified UIElement to the Children collection of a VirtualizingPanel element. (Inherited from VirtualizingPanel)
Arrange	Positions child objects and determines a size for a UIElement. Parent objects that implement custom layout for their child elements should call this method from their layout override implementations to form a recursive layout update. (Inherited from UIElement)
ArrangeOverride	Provides the behavior for the Arrange pass of layout. Classes can override this method to define their own Arrange pass behavior. (Inherited from FrameworkElement)
BringIndexIntoView	Generates the item at the specified index location and makes it visible. (Inherited from VirtualizingPanel)
CapturePointer	Sets pointer capture to a UIElement. Once captured, only the element that has capture will fire pointer-related events. (Inherited from UIElement)
ClearValue	Clears the local value of a dependency property. (Inherited from DependencyObject)
FindName	Retrieves an object that has the specified identifier name. (Inherited from FrameworkElement)
FindSubElementsForTouchTargeting	Enables a UIElement subclass to expose child elements that assist with resolving touch targeting. (Inherited from UIElement)
GetAnimationBaseValue	Returns any base value established for a dependency property, which would apply in cases where an animation is not active. (Inherited from DependencyObject)
GetIrregularSnapPoints	Returns the set of distances between irregular snap points for a specified orientation and alignment. (Inherited from OrientedVirtualizingPanel)
GetRegularSnapPoints	Gets the distance between regular snap points for a specified orientation and alignment. (Inherited from OrientedVirtualizingPanel)
GetValue	Returns the current effective value of a dependency property from a DependencyObject. (Inherited from DependencyObject)
InsertInternalChild	Adds the specified UIElement to the collection of a VirtualizingPanel element at the specified index position. (Inherited from VirtualizingPanel)
InvalidateArrange	Invalidates the arrange state (layout) for a UIElement. After the invalidation, the UIElement will have its layout updated, which will occur asynchronously. (Inherited from UIElement)
InvalidateMeasure	Invalidates the measurement state (layout) for a UIElement. (Inherited from UIElement)
LineDown	Scrolls content by one line toward the bottom. (Inherited from OrientedVirtualizingPanel)
LineLeft	Scrolls content by one line toward the left. (Inherited from OrientedVirtualizingPanel)
LineRight	Scrolls content by one line toward the right. (Inherited from OrientedVirtualizingPanel)
LineUp	Scrolls content by one line toward the top. (Inherited from OrientedVirtualizingPanel)
MakeVisible	Changes existing offsets in order to make the provided element visible in the viewport, and returns a Rect measurement of the area. (Inherited from OrientedVirtualizingPanel)
Measure	Updates the DesiredSize of a UIElement. Typically, objects that implement custom layout for their layout children call this method from their own MeasureOverride implementations to form a recursive layout update. (Inherited from UIElement)
MeasureOverride	Provides the behavior for the Measure pass of the layout cycle. Classes can override this method to define their own Measure pass behavior. (Inherited from FrameworkElement)
MouseWheelDown	Scrolls content by one mouse-wheel click toward the bottom. (Inherited from OrientedVirtualizingPanel)
MouseWheelLeft	Scrolls content by one mouse-wheel click toward the left. (Inherited from OrientedVirtualizingPanel)
MouseWheelRight	Scrolls content by one mouse-wheel click toward the right. (Inherited from OrientedVirtualizingPanel)
MouseWheelUp	Scrolls content by one mouse-wheel click toward the top. (Inherited from OrientedVirtualizingPanel)
OnApplyTemplate	Invoked whenever application code or internal processes (such as a rebuilding layout pass) call ApplyTemplate. In simplest terms, this means the method is called just before a UI element displays in your app. Override this method to influence the default post-template logic of a class. (Inherited from FrameworkElement)
OnClearChildren	Called when the collection of child elements is cleared by the base Panel class. (Inherited from VirtualizingPanel)
OnCreateAutomationPeer	When implemented in a derived class, returns class-specific AutomationPeer implementations for the Microsoft UI Automation infrastructure. (Inherited from UIElement)
OnDisconnectVisualChildren	Override this method to implement how layout and logic should behave when items are removed from a class-specific content or children property. (Inherited from UIElement)
OnItemsChanged	Called when the Items collection that is associated with the ItemsControl for this Panel changes. (Inherited from VirtualizingPanel)
PageDown	Scrolls content by one page toward the bottom. (Inherited from OrientedVirtualizingPanel)
PageLeft	Scrolls content by one page toward the left. (Inherited from OrientedVirtualizingPanel)
PageRight	Scrolls content by one page toward the right. (Inherited from OrientedVirtualizingPanel)
PageUp	Scrolls content by one page toward the top. (Inherited from OrientedVirtualizingPanel)
ReadLocalValue	Returns the local value of a dependency property, if a local value is set. (Inherited from DependencyObject)
ReleasePointerCapture	Releases pointer captures for capture of one specific pointer by this UIElement. (Inherited from UIElement)
ReleasePointerCaptures	Releases all pointer captures held by this element. (Inherited from UIElement)
RemoveHandler	Removes the specified routed event handler from this UIElement. Typically the handler in question was added by AddHandler. (Inherited from UIElement)
RemoveInternalChildRange	Removes child elements from the Children collection. (Inherited from VirtualizingPanel)
SetBinding	Attaches a binding to a FrameworkElement, using the provided binding object. (Inherited from FrameworkElement)
SetHorizontalOffset	Changes the horizontal offset of content within the OrientedVirtualizingPanel viewport. (Inherited from OrientedVirtualizingPanel)
SetValue	Sets the local value of a dependency property on a DependencyObject. (Inherited from DependencyObject)
SetVerticalOffset	Changes the vertical offset of content within the OrientedVirtualizingPanel viewport. (Inherited from OrientedVirtualizingPanel)
TransformToVisual	Returns a transform object that can be used to transform coordinates from the UIElement to the specified object. (Inherited from UIElement)
UpdateLayout	Ensures that all positions of child objects of a UIElement are properly updated for layout. (Inherited from UIElement)

Properties

The WrapGrid class has these properties.

Property	Access type	Description
ActualHeight	Read-only	Gets the rendered height of a FrameworkElement. (Inherited from FrameworkElement)
ActualWidth	Read-only	Gets the rendered width of a FrameworkElement. (Inherited from FrameworkElement)
AllowDrop	Read/write	Gets or sets a value that determines whether this UIElement can be a drop target for purposes of drag-and-drop operations. (Inherited from UIElement)
AreHorizontalSnapPointsRegular	Read-only	Gets a value that indicates whether the horizontal snap points for the OrientedVirtualizingPanel are equidistant from each other. (Inherited from OrientedVirtualizingPanel)
AreVerticalSnapPointsRegular	Read-only	Gets a value that indicates whether the vertical snap points for the OrientedVirtualizingPanel are equidistant from each other. (Inherited from OrientedVirtualizingPanel)
Background	Read/write	Gets or sets a Brush that is used to fill the panel. (Inherited from Panel)
BaseUri	Read-only	Gets a Uniform Resource Identifier (URI) that represents the base Uniform Resource Identifier (URI) for an XAML-constructed object at XAML load time. This property is useful for Uniform Resource Identifier (URI) resolution at run time. (Inherited from FrameworkElement)
CacheMode	Read/write	Gets or sets a value that indicates that rendered content should be cached as a composited bitmap when possible. (Inherited from UIElement)
CanHorizontallyScroll	Read/write	Gets or sets a value that determines how the OrientedVirtualizingPanel measures space for child elements for possible scrolling in the horizontal dimension. Not intended to be set in XAML. (Inherited from OrientedVirtualizingPanel)
CanVerticallyScroll	Read/write	Gets or sets a value that determines how the OrientedVirtualizingPanel measures space for child elements for possible scrolling in the vertical dimension. Not intended to be set in XAML. (Inherited from OrientedVirtualizingPanel)
Children	Read-only	Gets the collection of child elements of the panel. (Inherited from Panel)
ChildrenTransitions	Read/write	Gets or sets the collection of Transition style elements that apply to child content of a Panel subclass. (Inherited from Panel)
Clip	Read/write	Gets or sets the RectangleGeometry used to define the outline of the contents of a UIElement. (Inherited from UIElement)
DataContext	Read/write	Gets or sets the data context for a FrameworkElement when it participates in data binding. (Inherited from FrameworkElement)
DesiredSize	Read-only	Gets the size that this UIElement computed during the measure pass of the layout process. (Inherited from UIElement)
Dispatcher	Read-only	Gets the CoreDispatcher that this object is associated with. (Inherited from DependencyObject)
ExtentHeight	Read-only	Gets the vertical size of the panel extent. (Inherited from OrientedVirtualizingPanel)
ExtentWidth	Read-only	Gets the horizontal size of the panel extent. (Inherited from OrientedVirtualizingPanel)
FlowDirection	Read/write	Gets or sets the direction in which text and other UI elements flow within any parent element that controls their layout. This property can be set to either LeftToRight or RightToLeft. Setting FlowDirection to RightToLeft on any element sets the alignment to the right, the reading order to right-to-left and the layout of the control to flow from right to left. (Inherited from FrameworkElement)
Height	Read/write	Gets or sets the suggested height of a FrameworkElement. (Inherited from FrameworkElement)
HorizontalAlignment	Read/write	Gets or sets the horizontal alignment characteristics that are applied to a FrameworkElement when it is composed in a layout parent, such as a panel or items control. (Inherited from FrameworkElement)
HorizontalChildrenAlignment	Read/write	Gets or sets the alignment rules by which child elements are arranged for the horizontal dimension.
HorizontalChildrenAlignmentProperty	Read-only	Identifies the HorizontalChildrenAlignment dependency property.
HorizontalOffset	Read-only	Gets the horizontal offset of the scrolled content. (Inherited from OrientedVirtualizingPanel)
IsDoubleTapEnabled	Read/write	Gets or sets a value that determines whether the DoubleTapped event can originate from that element. (Inherited from UIElement)
IsHitTestVisible	Read/write	Gets or sets whether the contained area of this UIElement can return true values for hit testing. (Inherited from UIElement)
IsHoldingEnabled	Read/write	Gets or sets a value that determines whether the Holding event can originate from that element. (Inherited from UIElement)
IsItemsHost	Read-only	Gets a value that indicates whether this Panel is a container for UI items that are generated by an ItemsControl. (Inherited from Panel)
IsRightTapEnabled	Read/write	Gets or sets a value that determines whether the RightTapped event can originate from that element. (Inherited from UIElement)
IsTapEnabled	Read/write	Gets or sets a value that determines whether the Tapped event can originate from that element. (Inherited from UIElement)
ItemContainerGenerator	Read-only	Gets a value that identifies the ItemContainerGenerator for this VirtualizingPanel. (Inherited from VirtualizingPanel)
ItemHeight	Read/write	Gets or sets the height of the layout area for each item that is contained in a WrapGrid.
ItemHeightProperty	Read-only	Identifies the ItemHeight dependency property.
ItemWidth	Read/write	Gets or sets the width of the layout area for each item that is contained in a WrapGrid.
ItemWidthProperty	Read-only	Identifies the ItemWidth dependency property.
Language	Read/write	Gets or sets localization/globalization language information that applies to a FrameworkElement, and also to all child elements of the current FrameworkElement in the object representation and in UI. (Inherited from FrameworkElement)
ManipulationMode	Read/write	Gets or sets the ManipulationModes value used for UIElement behavior and interaction with gestures. (Inherited from UIElement)
Margin	Read/write	Gets or sets the outer margin of a FrameworkElement. (Inherited from FrameworkElement)
MaxHeight	Read/write	Gets or sets the maximum height constraint of a FrameworkElement. (Inherited from FrameworkElement)
MaximumRowsOrColumns	Read/write	Gets or sets a value that influences the wrap point, also accounting for Orientation.
MaximumRowsOrColumnsProperty	Read-only	Identifies the MaximumRowsOrColumns dependency property.
MaxWidth	Read/write	Gets or sets the maximum width constraint of a FrameworkElement. (Inherited from FrameworkElement)
MinHeight	Read/write	Gets or sets the minimum height constraint of a FrameworkElement. (Inherited from FrameworkElement)
MinWidth	Read/write	Gets or sets the minimum width constraint of a FrameworkElement. (Inherited from FrameworkElement)
Name	Read/write	Gets or sets the identifying name of the object. When a XAML processor creates the object tree from XAML markup, run-time code can refer to the XAML-declared object by this name. (Inherited from FrameworkElement)
Opacity	Read/write	Gets or sets the degree of the object's opacity. (Inherited from UIElement)
Orientation	Read/write	Gets or sets the direction in which child elements are arranged.
OrientationProperty	Read-only	Identifies the Orientation dependency property.
Parent	Read-only	Gets the parent object of this FrameworkElement in the object tree. (Inherited from FrameworkElement)
PointerCaptures	Read-only	Gets the set of all captured pointers, represented as Pointer values. (Inherited from UIElement)
Projection	Read/write	Gets or sets the perspective projection (3-D effect) to apply when rendering this element. (Inherited from UIElement)
RenderSize	Read-only	Gets the final render size of a UIElement. (Inherited from UIElement)
RenderTransform	Read/write	Gets or sets transform information that affects the rendering position of a UIElement. (Inherited from UIElement)
RenderTransformOrigin	Read/write	Gets or sets the origin point of any possible render transform declared by RenderTransform, relative to the bounds of the UIElement. (Inherited from UIElement)
Resources	Read/write	Gets the locally defined resource dictionary. In XAML, you can establish resource items as child object elements of a frameworkElement.Resources property element, through XAML implicit collection syntax. (Inherited from FrameworkElement)
ScrollOwner	Read/write	Gets or sets a reference to a ScrollViewer that is the scroll host or scroll owner for scrolling behavior of the OrientedVirtualizingPanel. (Inherited from OrientedVirtualizingPanel)
Style	Read/write	Gets or sets an instance Style that is applied for this object during layout and rendering. (Inherited from FrameworkElement)
Tag	Read/write	Gets or sets an arbitrary object value that can be used to store custom information about this object. (Inherited from FrameworkElement)
Transitions	Read/write	Gets or sets the collection of Transition style elements that apply to a UIElement. (Inherited from UIElement)
Triggers	Read-only	Gets the collection of triggers for animations that are defined for a FrameworkElement. Not commonly used. (Inherited from FrameworkElement)
UseLayoutRounding	Read/write	Gets or sets a value that determines whether rendering for the object and its visual subtree should use rounding behavior that aligns rendering to whole pixels. (Inherited from UIElement)
VerticalAlignment	Read/write	Gets or sets the vertical alignment characteristics that are applied to a FrameworkElement when it is composed in a parent object such as a panel or items control. (Inherited from FrameworkElement)
VerticalChildrenAlignment	Read/write	Gets or sets the alignment rules by which child elements are arranged for the vertical dimension.
VerticalChildrenAlignmentProperty	Read-only	Identifies the VerticalChildrenAlignment dependency property.
VerticalOffset	Read-only	Gets the vertical offset of the scrolled content. (Inherited from OrientedVirtualizingPanel)
ViewportHeight	Read-only	Gets the vertical size of the viewport or content area. (Inherited from OrientedVirtualizingPanel)
ViewportWidth	Read-only	Gets the horizontal size of the viewport or content area. (Inherited from OrientedVirtualizingPanel)
Visibility	Read/write	Gets or sets the visibility of a UIElement. A UIElement that is not visible is not rendered and does not communicate its desired size to layout. (Inherited from UIElement)
Width	Read/write	Gets or sets the width of a FrameworkElement. (Inherited from FrameworkElement)

Remarks

WrapGrid can only be used to display items in an ItemsControl. A primary scenario for WrapGrid is that it provides the items panel template behavior for GridView in default templates.

The content of a WrapGrid is virtualized. This can improve performance when you work with large data sets. For more info, see Load, store, and display large sets of data efficiently.

In a WrapGrid, elements are arranged in rows or columns that automatically wrap to a new row or column when the MaximumRowsOrColumns value is reached. The Orientation property specifies whether the grid adds its items in rows or columns before wrapping.

When the value is Vertical, the grid adds items in columns from top to bottom, then wraps from left to right, like this:

Item 1	Item 4	Item 7
Item 2	Item 5	Item 8
Item 3	Item 6	Item 9

When the value is Horizontal, the grid adds items in rows from left to right, then wraps from top to bottom, like this:

Item 1	Item 2	Item 3
Item 4	Item 5	Item 6
Item 7	Item 8	Item 9

Examples

Here's how to use a WrapGrid to change the layout of items in a ListView. The WrapGrid replaces the default StackPanel, which arranges items in a single column. We set the WrapGrid.MaximumRowsOrColumns property so that items are arranged in 2 columns.

XAML


<ListView Height="320" Width="260">
    <ListView.ItemsPanel>
        <ItemsPanelTemplate>
            <WrapGrid Orientation="Horizontal" MaximumRowsOrColumns="2"/>
        </ItemsPanelTemplate>
    </ListView.ItemsPanel>

    <Rectangle Height="100" Width="100" Fill="Blue" />
    <Rectangle Height="100" Width="100" Fill="Red" />
    <Rectangle Height="100" Width="100" Fill="Yellow" />
    <Rectangle Height="100" Width="100" Fill="Green" />
    <Rectangle Height="100" Width="100" Fill="Gray" />
    <Rectangle Height="100" Width="100" Fill="LightBlue" />
    <Rectangle Height="100" Width="100" Fill="Pink" />
    <Rectangle Height="100" Width="100" Fill="YellowGreen" />
</ListView>

Requirements

Minimum supported client	Windows 8 [Windows Store apps only]
Minimum supported server	Windows Server 2012 [Windows Store apps only]
Namespace	Windows.UI.Xaml.Controls Windows::UI::Xaml::Controls [C++]
Metadata	Windows.winmd

WrapGrid class