Sync with Kendo UI Professional

Author: Kendo Bot

docs-aspnet/html-helpers/datasource/cancellation-token.md

@@ -0,0 +1,48 @@
+---
+title: Cancellation Token
+page_title: Passing a Cancellation Token
+description: "Learn how to cancel an asynchronous call by passing additional parameter to the DataSource method."
+slug: htmlhelper_datasource_cancellationtoken
+---
+
+# Description
+
+It is possible to cancel the asynchronous call to database query or some other action if the time limit is reached or due to another problem. This is achieved by passing a [CancellationToken](https://docs.microsoft.com/en-us/dotnet/api/system.threading.cancellationtoken?view=netframework-4.8) parameter to the [ToDataSourceResultAsync](https://docs.telerik.com/{{ site.platform }}/knowledge-base/grid-add-asynchronous-calls-to-action-methods) method of the DataSource instance.
+
+In real-case scenarios, developers usually have also to consider other factors like Connection Time Limit, Invalid Input, etc. To help with this task, we exposed the capability to also pass a **CancellationToken** parameter which comes handy in this type of scenarios.
+
+# Example
+
+        public async Task<ActionResult> EditingInline_Read([DataSourceRequest] DataSourceRequest request)
+        {
+            CancellationTokenSource source = new CancellationTokenSource(2000);
+            CancellationToken token = source.Token;
+
+            var result = await GetOrders().ToDataSourceResultAsync(request, token);
+            return Json(result);
+        }
+
+        private List<OrderViewModel> GetOrders()
+        {
+            Thread.Sleep(3000);
+            return Enumerable.Range(0, 50).Select(i => new OrderViewModel
+            {
+                OrderID = i,
+                Freight = i * 10,
+                OrderDate = DateTime.Now.AddDays(i),
+                ShipName = "ShipName " + i,
+                ShipCity = "ShipCity " + i
+            }).ToList();
+        }
+
+
+You can find a full runnable sample with a Grid integration here:
+
+{% if site.mvc %}
+[Grid Sample with Cancellation Token](https://github.com/telerik/ui-for-aspnet-mvc-examples/tree/master/grid/grid-cancellationtoken/KendoGridCancellationToken)
+{% endif %}
+
+{% if site.core %}
+[Grid Sample with Cancellation Token](https://github.com/telerik/ui-for-aspnet-core-examples/blob/master/Telerik.Examples.Mvc/Telerik.Examples.Mvc/Views/Grid/AsynchronousBindingWithCancellationToken.cshtml)
+{% endif %}
+

src/kendo.draganddrop.js

@@ -894,10 +894,14 @@ var __meta__ = { // jshint ignore:line
 
             if (yInBounds) {
                 parent.scrollTop += velocity.y;
+            } else if (yIsScrollable && yDelta < 0) {
+                parent.scrollTop = 0;
             }
 
             if (xInBounds) {
                 parent.scrollLeft += velocity.x;
+            } else if (xIsScrollable && xDelta < 0) {
+                parent.scrollLeft = 0;
             }
 
             if (this.hint && isRootNode && (xInBounds || yInBounds)) {

styles/web/common/base.less

@@ -113,6 +113,7 @@
 .k-slider,
 .k-splitter,
 .k-treeview,
+.k-treeview > .k-group,
 .k-panelbar,
 .k-content,
 .k-header-column-menu {
@@ -125,6 +126,7 @@
 .k-splitbar,
 .k-calendar,
 .k-treeview,
+.k-treeview > .k-group,
 .k-pager-wrap,
 .k-grid-header .k-i-link-horizontal,
 .k-header-column-menu {