Changing the min / max value of the progressbar isn't possible.  For now, we have to destroy the progressbar and recreate a new one using the new min / max values.

Topojson is a much more compact data format for spatial data. Supporting it would allow more complex spatial data to be loaded without slowing down the browser experience.

You've already got two "Material" themes, but they don't really seem to match the Google Material Design guidelines (http://www.google.com/design/spec/material-design/introduction.html). Would it be possible to add a new theme that accurately tracks the Material Design guidelines?

https://svelte.dev/

Looks to be so much better than React.

Validation framework is great, but too much of a black-box.  No way to understand what failed.  For example, try using a bootstrap styled form, and have kendo validate and add/remove bootstrap error/OK styles from parent elements using onblur.

When using jQuery Validation in your forms, particularly with jQuery Unobtrusive Validation, the Kendo controls don't behave well from a styling perspective. In order to get things to work, you need to use a script like the one from this example:

https://github.com/telerik/kendo-examples-asp-net-mvc/blob/master/kendo-input-widgets-validation/KendoInputs_Validation/Views/Home/jQuery_KendoMvcValidate.cshtml

It would be nice if this script/support was better documented and potentially included as a supported mechanism rather than something each customer has to implement and tweak individually.

We were recently going to upgrade from Kendo 2012Q2 to 2013Q1. Unfortunately we can't because we require support for IE8+. 

Our issue is the grid's dataItem method. In IE, it's just too slow. In order to use the newer version of Kendo, we have to upgrade to jQuery 1.9.1 (supplied in the Kendo package). In some cases, the selectors you are using are 13x slower than they were in jQuery 1.7.1.

http://jsperf.com/jquery-1-9-performance-issues

In the dataItem method, you're using the ">" selector instead of children. This, coupled with :not causes this method to crawl. 

In the jsperf test I linked above, I profile many different scenarios. You might want to take a look and see if perhaps you can make use of the .children() method and .not() instead of :not in future releases.

I would like to implement something similar to what proposed here:
http://kendoui-feedback.telerik.com/forums/127393-telerik-kendo-ui-feedback/suggestions/6454228-separation-of-shapes-and-datasource-for-maps-in-da

Basically, it comes to binding shape properties to data: every time data changes, the filling of the shapes is changed accordingly.

Please, guys, this would be really good!

It looks like a Funnel chart type is one of the typically missing chart types from many html5 chart libs, currently. 

It's pretty useful and including it in dataWiz would give you a competitive edge towards other chart libs ;-)

The previous KendoUI mobile listview respected datasource grouping when endlessScroll was enabled. This functionality has regressed in the Q2.2013 release.

An extract from my support ticket 718079:

For our application, it is not acceptable that the ability to group with endless scrolling has been lost. Grouping is fundamental to the user experience in our app - especially when there can be a lot of items in a listview. It is just as important as the performance that endlessScroll enables. One, without the other is a backwards step.

Telerik response extract:

Thank you for your feedback. I fully agree with you - grouping of a large dataset improves the user experience and provides the necessary visual clues for the user to determine the current position in the list. The only reason why this is not supported is the high complexity and performance implications of the task, when combined with virtual mode, which is a requirement for a large list support - our previous implementation easily crashed the mobile browser when 100+ items were displayed. I would like to suggest that you post this feature request to our UserVoice feedback  site; we are actively following the popular items and responding to our customers demand with each release.
---

I do not believe the complexity is quite as high as has been described. The datasource can identify how many groups there are - for any current filters and adjust the endlessScroll height accordingly. The listview items themselves can be adjusted down in position by the number of group headers above them.

As of now there is no right click and double click events on diagram shapes, It will be useful if an event is raised on these particular actions. because these are the obvious actions on shapes

http://www.kendoui.com/forums/dataviz/chart/support-for-chart-types.aspx

Any update on this?

If you need to draw a horizontal line in Kendo DataViz Chart (to express desired target value for budget consumption, for example), you have now only two possibilities using line series or plot bands. Unfortunately both approaches have drawbacks:

1) Using additional line series
In this case the line doesn't start at the beginning of the image of the chart, there is visible margin. Also, the determining of number of values for the line series is painful in case you have multiple series with different value counts bind on server side.

2) Using plot bands
In this case the actual width of the band is dependent on the scale of the chart, which can be dynamic depending on data. So this approach is not usable if you want a line width specific width.

What we need is draw a simple line with given width, color and brush.

For example. I have article and I attached 3 files to it. Now i open article for edit because I want to add 2 more files but delete one. Of course i could make separate list of already uploaded files. But better would be to give to this UI element list of files to be populated on initialization.

With the Silverlight controls, one can make the charts scrollable. This is a great feature for adding tons of data without making the bars in a chart so small you can't click on them, and would make an excellent addition to an already great product.

We need the ability to modify the title of the new predefined dialog control.  This control is a great replacement for JavaScript alerts and confirms.  However, we should be able to modify the title by passing in an additional parameter when using the control.

Below is a workaround using CSS:

    <style>
        .k-confirm .k-window-titlebar::before,
        .k-alert .k-window-titlebar::before {
            content: 'My New Title';
            font-weight: bold;
        }
        .k-confirm .k-window-titlebar .k-dialog-title {
            visibility: collapse;
        }
        .k-dialog .k-window-titlebar .k-dialog-title {
            visibility: hidden;
        }
    </style>

I believe TabStrip is not supported with SplitView as SplitView can not be used in a view. This is inconsistent if the application needs a common TabStrip across all pages.

Make better kendo framework documentation. Demos are fine but it does not have many of the necessary information.

Make it easy to add Kendo UI to ASP.NET projects and provide a NuGet package.