Learning Dojo - 3.3 Asynchronous Programming

Learning Dojo -- 3.3 Asynchronous Programming
1.Handling dom events

  a.Define the event handler

        function alertSomeEvent(){  alert("someEvent");  }

  b.Connect some event to the handler

   function connect(){      dojo.connect(dojo.byId("someButton"),"click", alertSomeEvent);       }

  c.Register this connection when dom tree initialization is done
        

dojo.addOnLoad(connect);

2.Handling user-defined events

   It's similar with handling dom events, only that the events here user-defined functions

3.Publish-Subcribe Framework

    <!--I'm going to publish this topic when I am clicked -->    <button onclick="javascript:dojo.publish('someTopic')">publish</button>

    //A topic handler will handle this topic     dojo.subscribe("someTopic", handleSomeTopic);    //And it will handle the topic like this,       function handleSomeTopic(){    alert("some topic is published");  }}  

4.Advanced Topic
   Do the research by yourself if you need them
    a.Bubbling/Capturing  (Event Propagation)
    b.dojo.Deferred  (multi-thread programming)

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