Properties and Binding

Represents a property, which exposes a value and allows observers to see when that value has changed.

A concrete property that is readable and observable.

A concrete property that can be updated when bound to another property.

A concrete property that can be updated, but not read from.

Base class for properties that can be both read from and written to, i.e. is capable of bidirectional binding.

A concrete read/write property whose value can be mutated directly.

A read/write property whose storage is maintained external to the property. This is mainly useful for compatibility with existing UI frameworks. For example, an ExternalValueProperty may be used to add binding support to an existing AppKit control, such as the stringValue property of NSTextField.

A convenience form of WriteOnlyProperty that allows a given function to be called whenever a new value is delivered through a binding. This allows for use of the ~~> operator that allows for setting up a binding between a UI control that produces momentary events (e.g. UIButton clicks) and an ActionProperty that wraps an event handler.

A handle to a binding that is established by one of the bind or connect methods.

Describes the result of a connectBidi transformation.

Establishes a unidirectional binding between lhs and rhs. When the value of the synchronous rhs property changes, the value of lhs will be updated.

Establishes a unidirectional binding between lhs and rhs. When the value of the asynchronous rhs property changes, the value of lhs will be updated.

Establishes a bidirectional binding between the two properties. When one property’s value changes, the other property’s value will be updated and vice versa. Note that using this operator will cause the lhs property to take on the the rhs property’s value immedately.

Establishes a bidirectional binding between the two properties. When one property’s value changes, the other property’s value will be updated and vice versa. Note that using this operator will cause the lhs property to take on the the rhs property’s value immedately (if the value is defined).

Establishes a unidirectional binding such that rhs is poked whenever lhs delivers a new value.

Undocumented

Undocumented

A concrete readable property whose value is fetched asynchronously.

A concrete readable property whose value can be updated and fetched asynchronously.

Works in conjunction with will-change and did-change notifications that are delivered to a UI control when an associated Property’s underlying value is changing asynchronously.