Some details about the initialization of a qooxdoo application.

1. Load HTML
2. Load the JavaScript files

1. Merge user settings from previously defined qx.Settings.
2. Load qooxdoo core (OO, Array, String, validation, Object, …)
3. Load Logging module
4. Instantiate qx.Init
   1. attach event handler to onload, onbeforeunload and ununload

    qx.core.Init.getInstance().setApplication(new my.namespace.Application);

qx.Init._onload:

1. looks up the default application from the settings.
2. delegates initialization of the framework to the application.

1. Instantiate qx.ui.core.ClientDocument. ClientDocument is the basic widget of all qooxdoo applications. It is the parent of all children inside your application. It also handles their resizing and focus navigation.
2. Instantiate qx.event.handler.EventHandler. The event handler themselves get not yet attached.

1. Call main of the user defined applications class.
2. Start preloading of images

This phase is started after the image preloader system has finished loading.

1. Flush global queues. This creates the DOM nodes of the widgets and applies styling.
2. Global event handler for mouse, key and focus events are registered.