Class com.bumpslide.data.Model

com.bumpslide.data.Map
   +--com.bumpslide.data.Model

Description

This class represents an observable mapping of key value pairs

Primitive Map with additional functionality: 1 - ability to add getters/setter for all mapped values 2 - ability to watch for changes via dispatched events

This class was built to provide state management functionality.

Sample setup in Model Locator:

 	var stateVars:Object = {
 		section: 1,
 		selectedIds: [] 		
   } 
   ModelLocator.state = new Model( stateVars, "myappstate" );
 
 

Changing state using ObjectProxy-like getter/setter interface:

 	function onButtonPress() {
 		// If this changes the state, then events will be broadcast to listeners
 		ModelLocator.state.section = 2;
 	} 
 

Listening to changes in some other class:

   
   function init() {
 		ModelLocator.state.addEventListener( Model.VALUE_CHANGED_EVENT, Delegate.create( this, modelValueChanged ) );
 	}
 
 	function modelValueChanged( e:ModelValueChangedEvent ) {
 		trace( e.key +" has changed from "+e.oldValue +" to "+e.newValue);
   }    
 

Responding to model changes in the view using binding:

 
   // Some view clip...
   function onLoad() {
 		ModelLocator.state.bind( "section", this );
 	}
 
   // when section changes, this setter gets called 
   function set section (n) {
 		trace("Section is now "+n);
		// update view now
   }
 

Copyright (c) 2006, David Knape Released under the open-source MIT license. See LICENSE.txt for full license terms.