Table of Contents

Class EventTriggerBase<T>

Namespace
HeBianGu.Base.WpfBase
Assembly
HeBianGu.Base.WpfBase.dll

Represents a trigger that can listen to an element other than its AssociatedObject.

public abstract class EventTriggerBase<T> : EventTriggerBase, IAnimatable, IAttachedObject where T : class

Type Parameters

T

The type that this trigger can be associated with.

Inheritance
EventTriggerBase<T>
Implements
Derived
Inherited Members
Extension Methods

Remarks

EventTriggerBase extends TriggerBase to add knowledge of another object than the one it is attached to. This allows a user to attach a Trigger/Action pair to one element and invoke the Action in response to a change in another object somewhere else. Override OnSourceChanged to hook or unhook handlers on the source element, and OnAttached/OnDetaching for the associated element. The type of the Source element can be constrained by the generic type parameter. If you need control over the type of the AssociatedObject, set a TypeConstraintAttribute on your derived type.

Constructors

EventTriggerBase()

Initializes a new instance of the EventTriggerBase<T> class.

protected EventTriggerBase()

Properties

Source

Gets the resolved source. If is not set or cannot be resolved, defaults to AssociatedObject.

public T Source { get; }

Property Value

T

The resolved source object.

Remarks

In general, this property should be used in place of AssociatedObject in derived classes.

Methods

OnSourceChanged(T, T)

Called when the source property changes.

protected virtual void OnSourceChanged(T oldSource, T newSource)

Parameters

oldSource T

The old source.

newSource T

The new source.

Remarks

Override this to hook functionality to and unhook functionality from the specified source, rather than the AssociatedObject.

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