possibility to make protobuffer entities @observable about protobuf.dart HOT 7 CLOSED

You don't need to extend Observable you can use it as mixin

class SomeMessage extends GeneratedMessage with Observable {
 ...
}

The bigger problem is to know on what fields the annotations @observable should be applied or should maps and lists also wrapped in toObservable([]).
I think this should be defined in the proto files in some way for each property.

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For all field is not an option?

All fields in my proto need to be observable. It would help if we can
support this globally. A command line switch would be perfect.

Thanks for your support.
Le 23 sept. 2014 09:10, "Günter Zöchbauer" [email protected] a
écrit :

You don't need to extend Observable you can use it as mixin

class SomeMessage extends GeneratedMessage with Observable {
...}

The bigger problem is to know on what fields the annotations @observable
should be applied or should maps and lists also wrapped in toObservable([]).
I think this should be defined in the proto files in some way for each
property.

—
Reply to this email directly or view it on GitHub
https://github.com/dart-lang/dart-protoc-plugin/issues/29#issuecomment-56483198
.

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I didn't do much deep thinking about this topic yet but I'm sure it could be very useful in some projects and don't see a problem applying @observable on all simple fields String, int, double, bool but I am not so sure about collections, references to other classes. Normally all features come with a cost. It would be interesting to hear other thoughts.

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dart protobuffer messages store values in a map. There is no easy way to add @observable to simple fields. Access to such values are all wrapped in getters and setters.

Contrary to the Observable mixin ChangeNotifier doesn't use dirtyChecking.
As we wrap any modification in setField/clearField anyway I don't see any reason not to use ChangeNotifier.

I admit that I didn't think about Lists.
Are there any maps in protobuffers?

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I've started working on observable messages and repeated fields. Related bug:
#43

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In 0.4.2, you can subclass a GeneratedMessage to override the getter for eventPlugin and the new createRepeatedField() method to find out when fields change. This isn't a complete solution but it provides the hooks to write one.

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This won't be implemented. We are currently working on removing the existing eventPlugin API.

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