Ext.namespace('Ext.ux.data');
Ext.ux.data.CalcRecord = function(data, id) {
	Ext.ux.data.CalcRecord.superclass.constructor.call(this, data, id);
	this.calcFields();
}
Ext.ux.data.CalcRecord.create = function(o){
    var f = Ext.extend(Ext.ux.data.CalcRecord, {});
	var p = f.prototype;
    p.fields = new Ext.util.MixedCollection(false, function(field){
        return field.name;
    });
    for(var i = 0, len = o.length; i < len; i++){
        p.fields.add(new Ext.data.Field(o[i]));
    }
    f.getField = function(name){
        return p.fields.get(name);
    };
    return f;
};
Ext.extend(Ext.ux.data.CalcRecord, Ext.data.Record, {
	set: function(name, value) {
		if(String(this.data[name]) == String(value)){
			return;
		}
		this.dirty = true;
		if(!this.modified){
			this.modified = {};
		}
		if(typeof this.modified[name] == 'undefined'){
			this.modified[name] = this.data[name];
		}
		this.data[name] = value;
		this.calcFields(name);
		if(!this.editing && this.store){
			this.store.afterEdit(this);
		}
	},
	calcFields: function(name) {
		this.fields.each(function(field) {
			if ((field.name != name) && (typeof field.calc == 'function') &&
				(!name || (!field.dependencies || field.dependencies.indexOf(name) != -1))) {
				var value = field.calc(this);
				if (!name || field.notDirty) {
					this.data[field.name] = value;
				} else {
					this.set(field.name, value);
				}
			}
		}, this);
	}
});