IXRDependencyObject (Compact 2013)

Artigo
04/19/2017

3/28/2014

This C++ class represents a base class for objects that can both register and own dependency properties in the XAML for Windows Embedded dependency property system.

Syntax

class IXRDependencyObject: public IUnknown

Inheritance Hierarchy

IXRDependencyObject

IXRBrush

IXRCacheMode

IXRColorKeyFrame

IXRColorKeyFrameCollection

IXRColumnDefinition

IXRColumnDefinitionCollection

IXRControlTemplate

IXRDoubleCollection

IXRDoubleKeyFrame

IXRDoubleKeyFrameCollection

IXRDrawingAttributes

IXREasingFunctionBase

IXRGeometryCollection

IXRGradientStop

IXRGradientStopCollection

IXRObjectKeyFrameCollection

IXRPathFigure

IXRPathFigureCollection

IXRPathSegment

IXRPathSegmentCollection

IXRPointCollection

IXRPointKeyFrame

IXRPointKeyFrameCollection

IXRProjection

IXRResourceDictionary

IXRResourceDictionaryCollection

IXRRowDefinition

IXRRowDefinitionCollection

IXRSetterBase

IXRSetterBaseCollection

IXRStylusPointCollection

IXRTextElement

IXRTimeline

IXRTimelineCollection

IXRTransformCollection

IXRTriggerAction

IXRTriggerActionCollection

IXRTriggerBase

IXRTriggerCollection

IXRUIElement

IXRUIElementCollection

IXRVisualState

IXRVisualStateCollection

IXRVisualStateGroup

IXRVisualStateGroupCollection

IXRVisualTransition

IXRVisualTransitionCollection

Methods

Method	Description
IXRDependencyObject::AddDestroyedEventHandler	Adds an event handler for the Destroyed event, which occurs after all of the references to this dependency object are released.
IXRDependencyObject::GetAttachedProperty	Retrieves the value of the specified attached property.
IXRDependencyObject::GetDependencyProperty	Retrieves the value of the specified dependency property.
IXRDependencyObject::GetName	Retrieves the name of this dependency object.
IXRDependencyObject::RemoveDestroyedEventHandler	Removes an event handler from the Destroyed event, which occurs after all of the references to this dependency object are released.
IXRDependencyObject::SetAttachedProperty	Sets the specified attached property to the specified value.
IXRDependencyObject::SetDependencyProperty	Sets the specified dependency property to the specified value.
IXRDependencyObject::SetName	Sets the name of this dependency object.

Thread Safety

Members of this class are thread safe if you previously called IXRApplication::CreateHostFromXaml and supplied it with an XRWindowCreateParams structure that has AllowsMultipleThreadAccess set to true.

Remarks

This C++ class supports the methods on the IUnknown interface.

This is the base object from which most other objects that are used in XAML for Windows Embedded applications are derived. These derived objects are also dependency objects and can represent user-interface (UI) elements, collections, or characteristics that define appearance and behavior.

All these dependency objects can support dependency properties. A dependency property is a property that depends on several other sources for its final calculated value. Several factors can influence the value of a dependency property, including the properties of related UI objects in the presentation layout.

Dependency properties are supported by the XAML for Windows Embedded dependency property system. The dependency property system computes the values of properties and provides system notification about values that have changed.

The IXRDependencyObject class enables dependency property system services on its many derived classes.

IXRDependencyObject services and characteristics include the following:

Support for hosting dependency properties
Support for hosting attached properties
Support for Get and Set utility methods for accessing and modifying values of any dependency properties or attached properties that exist on an IXRDependencyObject derived object
A base class for IXRUIElement, from which various UI objects are derived

When you create a class instance, use an IXRDependencyObjectPtr smart pointer instead of a raw interface pointer. For more information, see XRPtr<Interface>.

.NET Framework Equivalent

System.Windows.DependencyObject

Requirements

Header	XamlRuntime.h
sysgen	SYSGEN_XAML_RUNTIME

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