Application

Application glues models, views, controllers, and stores to assemble a complete functional application.

Ext JS

In Ext JS, the Ext.app.Application class does the following:

Extends Ext.app.Controller.
Sets the path on the loader. This helps us in loading the application classes from folders other than the app folder.
Loads the Viewport class if autoCreateViewport is true. When set to true, the application will load the Viewport.js file from the appview folder.
Registers the onReady method where it instantiates and calls the init method on all the controllers.
Enables QuickTips if enableQuickTips was set to true.
Creates the Viewport if autoCreateViewport is true.
Calls the launch method of the application.
Fires the launch event.
Calls the onLaunch method of each of the controllers.

In Touch, the Ext.app.Application class does the following:

Extends the Ext.app.Controller class
Enables loader so that the dependencies can be loaded
Loads the profiles, if any
Instantiates controllers and loads their dependencies
Instantiates stores
Identifies the active profile and if there is an active profile, sets the current profile with it
Loads the dependencies of all the profiles configured for the profile
Calls the init method on all the controllers
Calls the launch method of the active profile
Calls the launch method of the application
Calls the launch method of all the controllers
Redirects the user to the appropriate controller method call based on the configured routes

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