Support DABC histogram in JavaScript. At the moment when histogram

   requested, DABC record converted into JSROOT.TH1 class
      

git-svn-id: https://subversion.gsi.de/dabc/trunk/plugins/root/js@2919 bcbf6573-9a26-0410-9ebc-ce4ab7aade96

Author: linev

scripts/JSRootPainter.js

@@ -7641,6 +7641,26 @@
       // one can load extra scripts here or assign draw functions
       ready_callback();
    }
+   
+   JSROOT.HierarchyPainter.prototype.GetOnlineItem = function(item, callback) {
+      // method used to request object from the http server
+      
+      var url = this.itemFullName(item);
+      if (url.length > 0) url += "/";
+      var h_get = ('_more' in item) || ('_doing_expand' in item);
+      url += h_get ? 'h.json?compact=3' : 'root.json.gz?compact=3';
+
+      var itemreq = JSROOT.NewHttpRequest(url, 'object', function(obj) {
+         if ((obj != null) && !h_get && (item._name === "StreamerInfo")
+               && (obj['_typename'] === 'TList'))
+            obj['_typename'] = 'TStreamerInfoList';
+
+         if (typeof callback == 'function')
+            callback(item, obj);
+      });
+
+      itemreq.send(null);
+   }
 
    JSROOT.HierarchyPainter.prototype.OpenOnline = function(server_address, user_callback) {
       var painter = this;
@@ -7653,22 +7673,7 @@
          painter.h['_online'] = server_address;
 
          painter.h['_get'] = function(item, callback) {
-
-            var url = painter.itemFullName(item);
-            if (url.length > 0) url += "/";
-            var h_get = ('_more' in item) || ('_doing_expand' in item);
-            url += h_get ? 'h.json?compact=3' : 'root.json.gz?compact=3';
-
-            var itemreq = JSROOT.NewHttpRequest(url, 'object', function(obj) {
-               if ((obj != null) && !h_get && (item._name === "StreamerInfo")
-                     && (obj['_typename'] === 'TList'))
-                  obj['_typename'] = 'TStreamerInfoList';
-
-               if (typeof callback == 'function')
-                  callback(item, obj);
-            });
-
-            itemreq.send(null);
+            painter.GetOnlineItem(item, callback);
          }
 
          painter.h['_expand'] = function(node, obj) {