I would like to request the data-query package support filtering on OData collections using lamdba functions. Given a Collection with the existing operators, the filter string outputted by `toODataString` should be OData v4 compliant.

Example: Project is a collection. A user filters to see all General projects which outputs { field: 'Project', operator: 'eq', value: 'General' }.

Recommendation: Supply another key that dictates the lamdba operator and property field to use.

{ field: 'Project', operator: 'eq', value: 'General', lambda: 'any', collectionField: 'Name' } -> $filter=Project/any(x:x/Name eq 'General')

The above can work with inner functions like contains.

{ { field: 'Project', operator: 'contains', value: 'gen', ignoreCase: true, lambda: 'any', collectionField: 'Name' } -> $filter=Project/any(x:contains(tolower(x/Name),'gen'))

As in the JQuery version, it would be good to have the option of showing the total of a column's values without having to use grouping aggregates. 

For example i have 10 products with their prices and i would like to see their total cost in a row below the column, without having to use grouping which adds more elements to the Grid.

Hi,

The new KendoReact Drawer component looks amazing and works like a charm. It would be great if it supported sub-items similar to the PanelBar component. Having sub-items would simplify the development of sidebar navigation with KendoReact.

<PanelBarItem title={'About'} route="/about">
    <PanelBarItem title={'Team'} route="/about/team" />
</PanelBarItem>

Regards,

Basel 

Whether the Treelist supports multi column headers ,Nest columns in the columns definition?

Like the Grid

https://www.telerik.com/kendo-react-ui/components/grid/columns/headers/

Currently, the onLegendItemHover can be used to detect mouseover event on a legend item.

Suggest adding an event mirroring the mouseout event.

Kendo UI for jQuery implements this

https://docs.telerik.com/kendo-ui/api/javascript/dataviz/ui/chart/events/legenditemleave

Existing implementation of Scheduler component has a very limited customization support. To cover some real use-cases we need:

1. Conditionally hide Scheduler Header and Footer. This is possible with CSS, but still makes sense to have props for that.
2. Customize tooltip content when hovering on the event. Currently tooltip is a one line text, but adding support of a larger popups on hover would allow to show additional info associated with that event. Please consider adding a prop to pass custom component for tooltip/popup rendering (similar to how Custom cells work in Kendo Grid)
3. Customize event component. Is there a way to have multiline text in the event component? Currently it is way to limited to show custom content e.g. adding custom icons is impossible.
4. All events in the same group have a same color when displaying. Please consider adding individual color support for each event. This would help to support error states for events.
5. Custom onDelete/onDoubleClick handlers. We would like to have custom implementation of Delete confirmation and Edit form.

Please advise on how to overcome those limitations as a short term solution and consider adding more Scheduler customization abilities to your Roadmap.

Example of highly configurable Scheduler/Timeline component:  https://js.devexpress.com/Demos/WidgetsGallery/Demo/Scheduler/Timelines/React/Light/

Currently, ComboBox generates a UUID and uses it as the input tag's id property (e.g. <input id="2e048165-6468-46c0-ba39-c47b12c7fcf2" />).

As a developer, I want to be able to set my own custom id so that I can set my own label tag as a sibling to the ComboBox component.

For example, I would like this to be possible:

<label for="hello">Hello World</label>
<ComboBox id="hello" />

There is a label prop offered on ComboBox which works fine but it does not let me specify the label tag with custom class names, styling, etc.

This new id prop should be optional and ComboBox can keep using the same technique it does when no id prop is passed to it.

It would be great to have a TreeList component similar in appearance and behavior to the jQuery TreeList (https://demos.telerik.com/kendo-ui/treelist/index), but with the kind of support for virtual scrolling built into the native KendoReact Grid component.

A React wrapper exists for the jQuery TreeList, but it still doesn't play nicely with React, and in any case only supports paging for displaying large data sets, which is inherently not intuitive for displaying tree structures where parent / child hierarchies might span multiple pages.

My sense is this native component would basically be the Grid, but with support for hierarchical data, including drag-and-drop re-ordering of parent / child relationships.

Thanks for considering this feature.

When using the tab strip, it'd be nice if there were an event that fired before the tab changed so that we could abort a tab chat. For example, if a tab has some input fields that allow a user to change some setting but they change the tab without hitting save or something. It'd be nice if I could pop up a modal and ask them to save before changing tab.

The function could just return true or false to allow the tab change, etc.

When adding an item (or editing an item) - it would be great to have the ability to customise the UI - for the dialog box.

This is for a component being included in a Dynamics365 view - using the PowerApps Component Framework.

Even if we had a 'double click' event - and then I could re-direct to the specific page/entity for editing.

For now - the 'default' dialog for edit doesn't work for what we need...

Our old application uses ASP.NET MVC Scheduler component which has GroupHeaderTemplate features to customize header rendering and add customization for following two functional features.

We are migrating applications to React. It seems like React Scheduler does not support GroupHeaderTemplate. We need the following two capabilities on custom rendering:

1. Customize rendering of resource group header & cell for vertical orientation of groups.

2. In the case of multiple groups, need the ability to make groups collapsible/hierarchical (like tree view nodes)

Need Terlik's guidance to achieve these two customizations on Kendo React Scheduler.

Hello,

I would like to make a general feedback after visiting KendoReact website for the first time. I'll expose a lot of wrongs, but keep in mind my goal is to give you insight for improvement, not to bash.

Context : I'm currently curating React UI frameworks for a new long term project within my company. I am a senior software architect seeking some general feelings about a the product (reliability and performance for example) but also very specific : easy layout management and very accomplished components such as Select.

Navigation

The documentation website ( https://www.telerik.com/kendo-react-ui/components ) is extraordinarily slow, this is very inconvenient when you're browsing to discover what the kit has to offer.

Accessing sub-section actually change the page, requiring a full reload, which again, is so slow I don't want to click on it. Seriously.
Take https://www.telerik.com/kendo-react-ui/components/dropdowns/multiselect/ for example, to discover all the features, I have to trigger several page load. This is not gonna happen ; I'll leave this. I did leave this. It's the most wanted component for me in my research. I left.

Content

The documentation pages does not expose the available properties of the component, I have to visit every sublink and read every source to find out. This is not ok either. I'm looking for a framework to save time, and this is starting to seriously leech my time.

The source code of the given examples are real. I can copy paste into an empty file, and it will work. This is the good side of the coin. The bad side of the coin is it takes me an, abnormal amount of time to see how the component is structured. That's the only thing that interest me on the first look. If I want deeper understanding and knowledge, yes please provide with a link to stackblitz or whatever so I can play with it, but first I want to see what it looks like.

You use unconventional naming. Look around in the js world, how people call stuff :

A form select is a select, not a dropdown. Within your dropdown menu item you have multi-select but you have to find it first !
A grid is a css grid, not a DataTable.
You have in your menu : Forms, Dropdown Select, Inputs, Upload. All of that is Form. How am I supposed to know if I've seen all form features if everything is spread around ? You also have Chart, Gauge and Drawing.
PanelBar ? Never heard of it. Accordion ? That's my boy.

You also present features that don't belong here, like Excel Export or PDF Processing whereas some basic information are missing such as "does it work well with TypeScript ?" : https://www.telerik.com/kendo-react-ui/knowledge-base/?search=typescript .

Features

You have a lot of components, some are very accomplished (i.e. TreeList) and others are quite average, such as Select. Check this competitor component : https://blueprintjs.com/docs/#select. Real world usages. Maybe you can achieve the very same thing with KendoReact, but even if true, I feel you don't understand what I need.

Too few UI framework care about layouts, KendoReact unfortunately is no exception. Layout is not just a box next to another. Layout is ordering content and filtering content depending on the device, it's putting some text over an image, it's making a row of three blocks and make sure they have the same height regardless of their content, it's having a page section that is exactly the size of the visitor's screen ; UIKit is very good at this ( https://getuikit.com/docs/height ). But it's also Special States : empty state ( https://material.io/design/communication/empty-states.html#content ) or result state ( https://ant.design/components/result/ )

My overall feeling is the product is disconnected from the environment and dev culture I'm working in.

Hello, 

I would like to request for the filter component to be supported in the KendoReact suite as it is in the ASP.NET Core UI suite.

One aspect is the hierarchical structure which can support complex filter scenarios but also the support to persist state of a set of filters.

Thank you

In the case of multiple columns headers, the column width of the KendoReact  TreeList  is invalid

Add render prop for the SplitButton.

This will allow changing the main button and also the button that opens the DropDownList.