ConnectionState enum

The state of connection to an asynchronous computation.

The usual flow of state is as follows:

  1. none, maybe with some initial data.
  2. waiting, indicating that the asynchronous operation has begun, typically with the data being null.
  3. active, with data being non-null, and possible changing over time.
  4. done, with data being non-null.

See also:

  • AsyncSnapshot, which augments a connection state with information received from the asynchronous computation.
Inheritance

Values

none → const ConnectionState

Not currently connected to any asynchronous computation.

For example, a FutureBuilder whose FutureBuilder.future is null.

waiting → const ConnectionState

Connected to an asynchronous computation and awaiting interaction.

active → const ConnectionState

Connected to an active asynchronous computation.

For example, a Stream that has returned at least one value, but is not yet done.

done → const ConnectionState

Connected to a terminated asynchronous computation.

Properties

hashCode → int
The hash code for this object.
no setterinherited
index → int
A numeric identifier for the enumerated value.
no setterinherited
runtimeType → Type
A representation of the runtime type of the object.
no setterinherited

Methods

noSuchMethod(Invocation invocation) → dynamic
Invoked when a nonexistent method or property is accessed.
inherited
toString() → String
A string representation of this object.
inherited

Operators

operator ==(Object other) → bool
The equality operator.
inherited

Constants

values → const List<ConnectionState>
A constant List of the values in this enum, in order of their declaration.