source: Dev/trunk/src/client/dojox/form/YearTextBox.js

define([
        "dojo/_base/kernel",
        "dojo/_base/lang",
        "dojox/widget/YearlyCalendar",
        "dijit/form/TextBox",
        "./DateTextBox",
        "dojo/_base/declare"
        ], function(kernel, lang, YearlyCalendar, TextBox, DateTextBox, declare){
                kernel.experimental("dojox/form/DateTextBox");
                return declare("dojox.form.YearTextBox", DateTextBox,
                {
                        // summary:
                        //              A validating, serializable, range-bound date text box with a popup calendar that contains only years

                        popupClass: YearlyCalendar,

                        format: function(value){
                                //console.log('Year format ' + value);
                                if(typeof value == "string"){
                                        return value;
                                }
                                else if(value.getFullYear){
                                        return value.getFullYear();
                                }
                                return value;
                        },

                        validator: function(value){
                                return value == "" || value == null || /(^-?\d\d*$)/.test(String(value));
                        },

                        _setValueAttr: function(value, priorityChange, formattedValue){
                                if(value){
                                        if(value.getFullYear){
                                                value = value.getFullYear();
                                        }
                                }
                                TextBox.prototype._setValueAttr.call(this, value, priorityChange, formattedValue);
                        },

                        openDropDown: function(){
                                this.inherited(arguments);
                                //console.log('yearly openDropDown and value = ' + this.get('value'));

                                this.dropDown.onValueSelected = lang.hitch(this, function(value){
                                        this.focus(); // focus the textbox before the popup closes to avoid reopening the popup
                                        setTimeout(lang.hitch(this, "closeDropDown"), 1); // allow focus time to take
                                        TextBox.prototype._setValueAttr.call(this,value, true, value);
                                });
                        },

                        parse: function(/*String*/ value, /*dojo.date.locale.__FormatOptions*/ constraints){
                                return value || (this._isEmpty(value) ? null : undefined); // Date
                        },

                        filter: function(val){
                                if(val && val.getFullYear){
                                        return val.getFullYear().toString();
                                }
                                return this.inherited(arguments);
                        }
                });
});