MessagesModel class
A single model to consolidate all messages.
Messages can arrive from serial devices or UDP devices, and any device can be unexpectedly disconnected at any time. To simplify the logic of subscribing for new messages, this model holds a stream of WrappedMessages that anyone can subscribe to. When a message arrives, simply call addMessage to ensure it will be added to the stream.
Note that having this model forward stream to the serial and UDP streams would not work,
as those streams can be closed when devices are disconnected, and new streams are created when
devices are connected for the first time. In that case, anyone who subscribes to the stream
before a device is connected (eg, in Model.init) won't get messages received afterwards. To
get around this issue, this model uses the same StreamController the entire time.
- Inheritance
-
- Object
- Model
- MessagesModel
Constructors
Properties
- hashCode → int
-
The hash code for this object.
no setterinherited
- hasListeners → bool
-
Whether any listeners are currently registered.
no setterinherited
- runtimeType → Type
-
A representation of the runtime type of the object.
no setterinherited
-
stream
→ Stream<
WrappedMessage> -
The stream of messages. Use WrappedMessageStream.onMessage to subscribe to messages.
no setter
Methods
-
addListener(
VoidCallback listener) → void -
Register a closure to be called when the object changes.
inherited
-
addMessage(
WrappedMessage message) → void - Adds a message to the stream.
-
dispose(
) → void -
Discards any resources used by the object. After this is called, the
object is not in a usable state and should be discarded (calls to
addListener will throw after the object is disposed).
inherited
-
init(
) → Future< void> -
Initializes any data needed by this model.
override
-
noSuchMethod(
Invocation invocation) → dynamic -
Invoked when a nonexistent method or property is accessed.
inherited
-
notifyListeners(
) → void -
Call all the registered listeners.
inherited
-
removeListener(
VoidCallback listener) → void -
Remove a previously registered closure from the list of closures that are
notified when the object changes.
inherited
-
sendMessage(
Message message, {bool checkVersion = true}) → void - Sends a command over the network or over Serial.
-
toString(
) → String -
A string representation of this object.
inherited
Operators
-
operator ==(
Object other) → bool -
The equality operator.
inherited