Tetris

BLoCs for Flutter made easy.

Goals

Simplicity

Write the Code you need with as minimal Boilerplate as possible

RxDart Syntax

Feel at Home

Flexibility

Be usefull everywhere, even in now-unknown places

Chaining

Yo dawg, I heard you like Blocs, so I put some Blocs in your Blocs, so now you can play Tetris while playing Tetris

(soon)

API

TetrisEvent(action, payload)

An Event happening in your App, originating by UI or somewhere else. TetrisEvents are fully described by

• String action The action you expect to happen
• String type Optional Type of event
• dynamic payload Any type of Object you want to process

TetrisBloc

A TetrisBloc is an asynchronous Event Processor. It handles events sourced through

MyTetrisBloc.dispatch(TetrisEvent.withAction(action:"MyAction")); 

in its

Stream<TetrisEvent> processEvent(TetrisEvent event)

function and yields a (new) event as a result.

TetrisProvider

TetrisProvicer is a DI Container that provides instances of your TetrisBloc's to Widgets in your App.
A Provider can hold multiple BLoCs and you can have multiple Providers in your App. To retrieve a BLoC from the Provider call

var bloc = TetrisProvider.of<MyBloc>(context) 

TetrisBuilder

TetrisBuilder is similar to StreamBuilder in that it will rebuild your Widgets on incoming TetrisEvents A Single Builder can receive Events from multiple BLoCs. It has a withFilter Constructor that allows you to drop Events that are not of interest.

TetrisBuilder.withFilter(
      blocs: [myFirstBloc, mySecondBloc],
      builder: (BuildContext context, TetrisEvent event) { return Text(event.action) },
      filter: (TetrisEvent event){ return event.action == "accept"; }
      ); 

Examples

Loading a List

With Simplicity in Mind, loading a List is down to two lines of code. To Trigger the Action:

 TetrisProvider.of<MyTetrisBloc>(context).dispatch(TetrisEvent.withAction("loadList")

And the full implementation of the Bloc is this:

class MyTetrisBloc extends TetrisBloc {
   Stream<TetrisEvent> processEvent(TetrisEvent event) async* {
     yield TetrisEvent.withPayload("loadList",[1,3,5,7]);
   }
}

Example Project

The classic "Button Clicker" Example is here

Contributors

• @dividebyzero
• Your name here ?