• Using render selectors to capture element references

    August 14, 2013

    One of the little known features of Ext JS is renderSelectors. It is used mostly internally but can come handy from time to time on the application side, too. The main purpose of the renderSelectors is to support compound Component templates: when you create a Component that consists of several DOM elements, grabbing the references […]

  • Using synchronous bidirectional communication with Controllers

    August 8, 2013

    In a big application, Controllers often need to communicate between each other in both directions; i.e. requesting some information and acting upon receiving it. Direct method calls are usually used for this: Ext.define('My.controller.Foo', { extend: 'Ext.app.Controller', onPanelButtonClick: function(button) { // Before dispatching a message to Bar, we need to ask Baz // if it has […]

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