What is FrameworkPropertyMetadata?

For most WPF framework-level application development purposes, FrameworkPropertyMetadata is the type used for dependency property metadata, rather than the base metadata types PropertyMetadata or UIPropertyMetadata. This is true both for existing dependency properties and for most custom dependency property scenarios.

What is CoerceValueCallback?

The CoerceValueCallback for a dependency property is invoked any time that the property system or any other caller calls CoerceValue on a DependencyObject instance, specifying that property’s identifier as the dp . Changes to the property value may have come from any possible participant in the property system.

What is Property metadata?

Property metadata can be defined and used during dependency property registration when calling the Register method (or variations for attached properties or read-only dependency properties), or after original owner registration when calling the OverrideMetadata method. AddOwner also takes property metadata.

What is a dependency property in WPF?

In WPF applications, dependency property is a specific type of property which extends the CLR property. It takes the advantage of specific functionalities available in the WPF property system. A class which defines a dependency property must be inherited from the DependencyObject class.

What is value coercion?

What is value coercion? If you are not familiar with value coercion, it is simply a mechanism by which related (or “interdependent”) dependency properties can be kept in sync and valid. The quintessential example can be found within the Slider control. A Slider has both Minimum and Maximum properties.

What is a callback which can be registered with property that can change the value of property?

The PropertyChangedCallback is used to create a callback that changes an internal property whenever the public property changes.

What is metadata used for?

Metadata summarizes basic information about data, making finding & working with particular instances of data easier. Metadata can be created manually to be more accurate, or automatically and contain more basic information.

What is CLR property in WPF?

Windows Presentation Foundation (WPF) provides a set of services that can be used to extend the functionality of a common language runtime (CLR) property. Collectively, these services are typically referred to as the WPF property system.

What is difference between dependency property and attached property?

Attached properties allows container to create a property which can be used by any child UI elements whereas dependency property is associated with that particular elements and can help in notification of changes and reacting to that changes.

What is implicit coercion?

Implicit coercion refers to type conversions that are hidden, with non-obvious side-effects that implicitly occur from other actions. In other words, implicit coercions are any type conversions that aren’t obvious (to you).

What are the types of coercion?

And still there are only three types of conversion: numeric, string and boolean. coerced to true , no matter if an object or an array is empty or not. Objects are converted to primitives via the internal [[ToPrimitive]] method, which is responsible for both numeric and string conversion.

What is CreateFcn in MATLAB?

CreateFcn. Callback executes when MATLAB creates the object, but before it is displayed.

What is a callback MATLAB?

A callback is a function that executes in response to some predefined user action, such as clicking on a graphics object or closing a figure window. Associate a callback with a specific user action by assigning a function to the callback property for that user action.

What are examples of meta data?

A simple example of metadata for a document might include a collection of information like the author, file size, the date the document was created, and keywords to describe the document. Metadata for a music file might include the artist’s name, the album, and the year it was released.

What is Dependencyobject?

Dependency object is the base object for all WPF objects. All the UI Elements like Buttons TextBox etc and the Content Elements like Paragraph, Italic, Span etc all are derived from Dependency Object. Dependency objects are used for WPF property system.

When should you use a attached property?

Creating an attached property is useful when:

1. You need a property setting mechanism available to classes other than the defining class.
2. One of your classes represents a service, and you want other classes to integrate the service more transparently.

What is the difference between propertymetadata and uipropertymetadata?

if you just want to back a property by dp and provide a default value, use PropertyMetadata, if you want to specify animation behavior, use UIPropertyMetadata, but if some property affects wpf framework level stuffs eg element layout, parent layout or databinding, use FrameworkPropertyMetadata.

How do I use uiui property metadata?

UIProperty Metadata Property metadata can be defined and used during dependency property registration when calling the Register method (or variations for attached properties or read-only dependency properties), or after original owner registration when calling the OverrideMetadata method. AddOwner also takes property metadata.

How do I define and use property metadata for dependency properties?

Property metadata can be defined and used during dependency property registration when calling the Register method (or variations for attached properties or read-only dependency properties), or after original owner registration when calling the OverrideMetadata method. AddOwner also takes property metadata.

How do I instantiate a propertymetadata instance?

There are two methods that can instantiate a PropertyMetadata instance: a constructor, and a static PropertyMetadata.Create method. Each of these methods has multiple signatures.