Add complex examples like the ones we find on http://dev.sencha.com/deploy/ext-4.0.0/examples/

It would be great if the chart control was able to produce a radar or spider chart, currently we have to use Silverlight to deliver this feature in our solutions. 

Tooltips (especially in charts) get clipped. Need to ensure tooltip is posted in display area.

LESS is a very good idea to use, makes Kendo styles much more readable! However, right now the LESS syntax used to generate styles (ThemeBuilder for example) use a non-official branch of LESS syntax. Unfortunately this makes LESS impossible to compile any other way than using the changed JS libraries and harder to integrate with other LESS in the project.

I suggest you either convince the LESS community that the changes are good and merge them into the official branch or consider the possibilities to use official LESS syntax.

Listview scrolling becomes very laggy after more than 30 or so items are bound via endless scrolling or pull-to-refresh. In the article below by Chris Love he discusses Facebook's decision to abandon html5 for native apps and states the fault isn't necessarily with html5. He suggests techniques such as removing DOM elements when the markup is scrolled far out of view and not reachable with 2-3 flicks that could drastically improve performance for scenarios such as the Facebook infinite scroller. Would it be possible to implement a performance-enhancing technique such as this as a built-in feature of the KendoMobileListView scrolling? I have already made it a practice to never use With Blocks in my ListView item templates by assigning { useWithBlock: false } and would appreciate any other performance optimization options.

http://professionalaspnet.com/archive/2012/12/27/Don_2700_t-Make-Facebook_2700_s-Mistake_2C00_-Architect-for-the-Modern-World.aspx

At present there is no method in the grid's public API to insert an item (i.e. fully populated new row) into the grid programmatically, that is, as distinct from visual edit mode using addRow().  

There are methods to update the dataItem, and to remove an item, but no counterpart method to add an item exists. 

There are many use cases for this method; for one possible use case, please see this thread:

http://www.kendoui.com/forums/ui/grid/how-to-append-a-row-programmatically-not-in-edit-mode.aspx#2442552

For my purposes, it would be optimal if the requested addItem() method did not destroy the UI state of expanded/collapsed groups.

After it has been inserted, the item needs to behave exactly like all of the other rows in the grid: it should be "observed"; it should have a data-UID; it should have a corresponding dataItem; be included in grouping, sorting, filtering, etc etc.

In addition to basic Line and Area chart types, it would be great to add support for the Step Line and Step Area chart type.
Examples: 
http://www.infragistics.com/products/jquery/sample/chart/style-chart-with-themes (switch Series Type to Step Line and Step Area)
or http://www.highcharts.com/stock/demo/step-line

To use Kendo UI as View part of MVP pattern where Model and Presenter reside in GWT it is important to have a GWT wrapper for Kendo UI.

In an android phonegap app the user experience in forms is bad for selecting dates or scrolling lists (due to the use of the standard browser). It would be nice to get a set of widgets to get a consistent user experience for all platforms. Check also mobiscroll.com.

A Pluralsight Course or Telerik Video Training, building a real App with KendoUI Mobile and AngularJS in AppBuilder that shows MVVM, remote DataSources, SQL Storage on the device, BarcodeScanner, Analytics and Backend Services.

Add required validation support when using radio buttons. This is currently not supported out of the box. Ideally only one radio button in a group should need the required attribute, not all of them.

See forum post below for more information:

http://www.telerik.com/forums/extending-the-kendo-ui-validator-to-support-required-validation-on-radio-buttons

It would be nice to have a widget to display network map of all connected node and links.

Add an Year view in addition to the Day, Week and Month views.

When using numeric text box with AngularJS - the model value should be affected by using the arrows, just like it's affected by typing inside the control.

Hi, We have a client request to show week number in kendo ui scheduler timeline view and month view. 

Thanks, 
Lilan

Starting with Kendo-UI 2017, I've noticed that the row filter now shows two "x" buttons to clear the filter (one inside the text box and one to the right of the text box).  It's confusing having two of the exact same buttons next to each other, each doing a slightly different thing.  Please add option to remove either one of the two buttons without having to either do a dataBound or CSS trickery to hide them.

Once a theme is created and the css/less code is grabbed, the only way to easily and visually modify the theme later is to input all the old values back into the themebuilder.  It would be nice if there was a way to easily get the values back into the themebuilder from a created theme.  To take a page from jQuery UI, they stick a commented out URL into the theme's CSS that will automatically load the themeroller with all values filled out.  This is extremely handy for modifying themes.

Hello,

I very much appreciate the effort put into kendoUI, and the widgets look pretty good.  I just have one major issue with how the methods can be called upon as they have an enourmous impact on our code since object chaining and the great advantages jQuery offers with object chaining is simply being thrown away because of the way you force us to use the .data() method to get the kendoUI object.

Following the guidelines on http://docs.jquery.com/Plugins/Authoring, we should be able to do the following:

$('div.grid').kendoGrid(); // Initilises the grid
$('div.grid').kendoGrid('refresh'); // calls the refresh method on the grid

this should always return the jquery object which enables object chaining, so we might do the following:

$('div.grid').kendoGrid('refresh').show();

Unfortunately, the above example using KendoUI would need to be translated into:

$('div.grid').data("kendoGrid").refresh();

because the .data() method obviously does not return a jQuery object, and the refresh() method doesn't either, we can no longer benefit from chaining, and need to reselect the object to execute the show() method:

$('div.grid').show();

This obviously does make things more complicated, and will cause for more code.

I sincerely believe this needs to be addressed.  A forum topic on this is available at http://www.kendoui.com/forums/ui/general-discussions/why-aren-t-widget-methods-just-added-through-object-extention.aspx#2040399

Add ability to have graph "scroll" like a stock ticker. This would allow for the graph to dipslay large X axis values while still contained smaller graph area.  This woudl also help with displaying dataviz on mobile applications as it would give virtual space to the smaller devices.