TextElement Class

Reference

Definition

Namespace:: Windows.UI.Xaml.Documents

Important

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An abstract class used as the base class for the also-abstract Block and Inline classes. TextElement supports common API for classes involved in the XAML text object model, such as properties that control text size, font families and so on.

public ref class TextElement : DependencyObject

/// [Windows.Foundation.Metadata.ContractVersion(Windows.Foundation.UniversalApiContract, 65536)]
/// [Windows.Foundation.Metadata.MarshalingBehavior(Windows.Foundation.Metadata.MarshalingType.Agile)]
/// [Windows.Foundation.Metadata.Threading(Windows.Foundation.Metadata.ThreadingModel.Both)]
class TextElement : DependencyObject

[Windows.Foundation.Metadata.ContractVersion(typeof(Windows.Foundation.UniversalApiContract), 65536)]
[Windows.Foundation.Metadata.MarshalingBehavior(Windows.Foundation.Metadata.MarshalingType.Agile)]
[Windows.Foundation.Metadata.Threading(Windows.Foundation.Metadata.ThreadingModel.Both)]
public class TextElement : DependencyObject

Public Class TextElement
Inherits DependencyObject

Inheritance: Object Platform::Object IInspectable DependencyObject TextElement

Derived: Windows.UI.Xaml.Documents.Block

Windows.UI.Xaml.Documents.Inline

Attributes: ContractVersionAttribute MarshalingBehaviorAttribute ThreadingAttribute

Windows requirements

Device family	Windows 10 (introduced in 10.0.10240.0)
API contract	Windows.Foundation.UniversalApiContract (introduced in v1.0)

Remarks

The various properties defined by TextElement support a common API for classes involved in the XAML text object model. Here's a list of the most commonly used properties:

By setting TextElement properties, you can apply common text formatting properties to text, both in blocks and in inlines. There are also additional ways to format text, but these aren't directly supported by TextElement. Instead, you can use the attached properties of the Typography class. Typography attached properties typically support advanced typographic features or conventions, such as accessing typographic features defined at the font level that are not necessarily supported by all fonts. For example, you could set Typography.Variants as an attached property on any text block or inline, and this would influence the font-variants behavior as enabled by the particular font you chose for setting FontFamily on that text element.

TextElement doesn't inherently define a connection point to a XAML visual tree. In other words a TextElement defines text and text object model within that text, but it doesn't yet enable the display of that text within a UI. For that, you need to use one of the controls or elements that are descendants of UIElement and can be connected to the XAML tree and the root visual of your app window. There are two such elements in the Windows Runtime:

TextBlock: Supports a text object model of inlines only with its Inlines collection.
RichTextBlock: Supports a block text object model with its Blocks collection. The blocks can contain blocks and inlines.

Note

PasswordBox, RichEditBox and TextBox don't support a text object model that's based on TextElement. RichEditBox does enable programmatic access to a different text object model through the ITextDocument interface.

TextElement defines API that support examining the text object model as programming objects after the XAML is parsed. In particular TextElement implements Name and Language, which parallel properties of the same name on FrameworkElement. TextElement also implements FindName (a utility method for finding objects at run time based on how Name was set in initial XAML), and OnDisconnectVisualChildren (for advanced scenarios and designer support).

TextElement has four properties that provide access to TextPointer objects from within text. These properties are: ContentStart, ContentEnd, ElementStart, ElementEnd. A Windows Runtime TextPointer object gives you an entry point for traversal of content. For more info, see TextPointer.

TextElement is a class derived from DependencyObject. That means it can define dependency properties, and each of the read-write properties of TextElement is a dependency property, with its property identifier also defined by TextElement. For more info on what dependency properties enable, see Dependency properties overview.

TextElement derived classes

TextElement is the parent class for two derived classes that split the text object model into two text usage conventions: Block, and Inline. Block and Inline are both considered base classes (you don't typically see a <Block> tag in XAML) and exist in the hierarchy mainly to be the parent class of other practical text elements. For example, Block is the parent class of Paragraph. For more info on how to use block and inline elements, see Quickstart: Displaying text.

Version history

Windows version	SDK version	Value added
1607	14393	AccessKey
1607	14393	AllowFocusOnInteraction
1607	14393	ExitDisplayModeOnAccessKeyInvoked
1703	15063	AccessKeyDisplayDismissed
1703	15063	AccessKeyDisplayRequested
1703	15063	AccessKeyInvoked
1703	15063	AccessKeyScopeOwner
1703	15063	IsAccessKeyScope
1703	15063	KeyTipHorizontalOffset
1703	15063	KeyTipPlacementMode
1703	15063	KeyTipVerticalOffset
1703	15063	TextDecorations
1903	18362	XamlRoot

Properties

AccessKey	Gets or sets the access key for this element.
AccessKeyProperty	Identifies the AccessKey dependency property.
AccessKeyScopeOwner	Gets or sets a source element that provides the access key scope for this element, even if it's not in the visual tree of the source element.
AccessKeyScopeOwnerProperty	Identifies the AccessKeyScopeOwner dependency property.
AllowFocusOnInteraction	Gets or sets a value that indicates whether the element automatically gets focus when the user interacts with it.
AllowFocusOnInteractionProperty	Identifies the AllowFocusOnInteraction dependency property.
CharacterSpacing	Gets or sets the uniform spacing between characters, in units of 1/1000 of an em.
CharacterSpacingProperty	Identifies the CharacterSpacing dependency property.
ContentEnd	Gets a TextPointer that represents the end of the content in the element.
ContentStart	Gets a TextPointer that represents the start of content in the element.
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)
ElementEnd	Gets a TextPointer that represents the position just after the end of the element.
ElementStart	Gets a TextPointer that represents the position just before the start of the element.
ExitDisplayModeOnAccessKeyInvoked	Gets or sets a value that specifies whether the access key display is dismissed when an access key is invoked.
ExitDisplayModeOnAccessKeyInvokedProperty	Identifies the ExitDisplayModeOnAccessKeyInvoked dependency property.
FontFamily	Gets or sets the preferred top-level font family for the content of the element.
FontFamilyProperty	Identifies the FontFamily dependency property.
FontSize	Gets or sets the font size for the content of the element.
FontSizeProperty	Identifies the FontSize dependency property.
FontStretch	Gets or sets the glyph width of the font in a family to select.
FontStretchProperty	Identifies the FontStretch dependency property.
FontStyle	Gets or sets the font style for the content in this element.
FontStyleProperty	Identifies the FontStyle dependency property.
FontWeight	Gets or sets the top-level font weight to select from the font family for the content in this element.
FontWeightProperty	Identifies the FontWeight dependency property.
Foreground	Gets or sets the Brush to apply to the content in this element.
ForegroundProperty	Identifies the Foreground dependency property.
IsAccessKeyScope	Gets or sets a value that indicates whether an element defines its own access key scope.
IsAccessKeyScopeProperty	Identifies the IsAccessKeyScope dependency property.
IsTextScaleFactorEnabled	Gets or sets whether automatic text enlargement, to reflect the system text size setting, is enabled.
IsTextScaleFactorEnabledProperty	Identifies the IsTextScaleFactorEnabled dependency property.
KeyTipHorizontalOffset	Gets or sets a value that indicates how far left or right the keytip is placed in relation to the text element.
KeyTipHorizontalOffsetProperty	Identifies the KeyTipHorizontalOffset dependency property.
KeyTipPlacementMode	Gets or sets a value that indicates where the KeyTip is placed in relation to the text element.
KeyTipPlacementModeProperty	Identifies the KeyTipPlacementMode dependency property.
KeyTipVerticalOffset	Gets or sets a value that indicates how far up or down the keytip is placed in relation to the text element.
KeyTipVerticalOffsetProperty	Identifies the KeyTipVerticalOffset dependency property.
Language	Gets or sets localization/globalization language information that applies to a TextElement.
LanguageProperty	Identifies the Language dependency property.
Name	Gets or sets a unique identification for the object. Name can only be set from initial parsing of XAML.
TextDecorations	Gets or sets a value that indicates what decorations are applied to the text.
TextDecorationsProperty	Identifies the TextDecorations dependency property.
XamlRoot	Gets or sets the XamlRoot in which this element is being viewed.

Methods

ClearValue(DependencyProperty)	Clears the local value of a dependency property. (Inherited from DependencyObject)
FindName(String)	Retrieves an object in the object model / runtime object graph by referencing the object's x:Name or Name attribute value.
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)	Returns the current effective value of a dependency property from a DependencyObject. (Inherited from DependencyObject)
OnDisconnectVisualChildren()	Override this method to implement how layout and logic should behave when items are removed from a class-specific content or child property.
ReadLocalValue(DependencyProperty)	Returns the local value of a dependency property, if a local value is set. (Inherited from DependencyObject)
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)

Events

AccessKeyDisplayDismissed	Occurs when the access key sequence is complete to notify controls that they should hide access key visuals.
AccessKeyDisplayRequested	Occurs when the access key sequence is started to notify controls that they should show access key visuals.
AccessKeyInvoked	Occurs when a user completes an access key sequence to notify the element that the access key action should be invoked.

Applies to

Delen via