Question

I what to share some events from my application to be shared across the views and controllers.
For example, event: “updates from server are available”.
To do that I can fireEvent(“updatesAvailable”) in the controller, but that makes other components to subscribe to that particular controller that fires that event.

What I want is to have a singleton object that will keep all application logic events subscriptions.

Currently I see that I can solve the problem with having one shared view instance and subscribe all to it. But I would like to know is there is one out of the box Event Dispatcher that is aware about all events inside the application.

Answer 1

As far as I understand you want to use pattern ‘Event Bus’?
You could use the ‘global’ and single object that exists in every ST2 application – Ext.Viewport. At least I’m creating in my app and till now nothing is bad.
Note, the best place to create event handler is controller’s init() method.

Ext.define('Myapp.controller.ActivitiesController', {

extend : 'Ext.app.Controller',

requires : [],
    config: {
        refs: {
            myview: 'myview'
        }
...
    init: function () {
    var me = this;

    Ext.Viewport.on({
        scope: this,
        addactivitytype: function (config) {
                    var myview = me.getMyview(),
                        record = config.record
...

          });
     }
});

in the another controller (or ever view) you could write

 addActivityTypeTap: function (record) {
      ....
      Ext.Viewport.fireEvent('addactivitytype', {
        record: record
      });
 }