Implemented culture for jQuery date picker

Author: T_S_V

src/jquery-ui-datepicker.js

@@ -1,4 +1,5 @@
 function init(Survey, $) {
+
   $ = $ || window.$;
   if (!$.fn.bootstrapDP && !!$.fn.datepicker && !!$.fn.datepicker.noConflict) {
     $.fn.bootstrapDP = $.fn.datepicker.noConflict();
@@ -35,6 +36,33 @@ function init(Survey, $) {
         name: "config",
         default: null
       });
+      Survey.JsonObject.metaData.addProperty("datepicker", {
+        name: "dateSeparator",
+        choices: function(obj) {
+          return Survey.cultureInfo && Survey.cultureInfo.getCulture(obj && obj.culture).dateSeparators || [];
+        },
+        onSetValue: function(obj, value, jsonConv) {
+          var newValue = value || "/";
+          if(!!obj.shortDateFormat) {
+            var regex = new RegExp(obj.dateSeparator, 'g');
+            obj.shortDateFormat =  obj.shortDateFormat.replace(regex, newValue);
+          }
+          obj.setPropertyValue("dateSeparator", newValue);
+        },
+        default: "/"
+      });
+      Survey.JsonObject.metaData.addProperty("datepicker", {
+        name: "shortDateFormat",
+        dependsOn: "dateSeparator",
+        choices: function(obj) {
+          return (Survey.cultureInfo && Survey.cultureInfo.getCulture(obj && obj.culture).shortDateFormats || []).map(function(fmt) {
+            return {
+              text: fmt.text.replace(/\//g, obj.dateSeparator || "/"),
+              value: fmt.value.replace(/\//g, obj.dateSeparator || "/")
+            }
+          });
+        }
+      });
     },
     afterRender: function(question, el) {
       var $el = $(el).is(".widget-datepicker")
@@ -50,6 +78,11 @@ function init(Survey, $) {
         config.dateFormat = !!question.dateFormat
           ? question.dateFormat
           : undefined;
+          if (config.dateFormat === undefined) {
+            config.dateFormat = !!question.shortDateFormat
+            ? question.shortDateFormat
+            : undefined;
+          }
       }
       if (config.option === undefined) {
         config.option = {