Dear Kendo,

I'm currently working on a data grid that has virtual scrolling enabled. When a user is scrolling fairly quickly, the screen will constantly flash white. See video in attachment.

I see this same behaviour in the example provided in the docs here: https://stackblitz.com/run/?file=app%2Fmain.jsx although it is slightly less noticeable.

What can we do to fix this?

Thanks in advance.

Kind regards,

Peter

We have the requirement to have a data grid with drag and drop configured to support auto scroll when the data grid has no fixed height set and overflow/scrollbar is enabled on the a parent element (div or body).

Full details as per support ticket 1571735.

Hi,

I would like to request a feature for the scatter line type chart for the crosshair line depending on axis to snap to points on the scatter chart. 
An example of this would be like showing X axis crosshair only and having on hover of mouse to snap to nearest dot. (not showing crosshair between points, but always on a point.)

The closest working example I can find of this on kendo react is the bar chart for crosshair tool tip first example https://www.telerik.com/kendo-react-ui/components/charts/chart/elements/crosshairs/ but after talking to support it does not support scatter line chart.

but only with category axis(X axis). 

The desired behavior would be the above but on a scatter line chart using separate axis y or x crosshair only and having them to snap to points instead of hovering between points. If you do hover between points, it should snap to nearest point to mouse cursor.

This sandbox has the behavior but only for a bar chart. https://stackblitz.com/edit/react-qnn9h4?file=app%2Fmain.jsx

Test Environment:

1. Go to system settings.

2. Navigate to 'Accessibility' and activate it.

3. Navigate to 'Contrast theme' and activate it.

4. Select 'Desert/Aquatic' High Contrast theme in the combo box.

Repro Steps:

1. Open given URL https://canvasjs.com/docs/charts/chart-options/axisx/viewport-minimum/ in Edge.

2. Graph page will be open. 

3. Turn on High contrast theme. 

4. Verify that Graphs are not adapting high contrast Aquatic and Desert modes or not. 

Actual Behavior:

Graphs are not adapting high contrast Aquatic and Desert modes. They remain same as in normal mode.  

Expected Behavior:

 Graphs should adapt high contrast Aquatic and Desert modes as defined. All elements should adapt to respective modes properly. 

Just as a first note, the documentation on how to write a custom `messagesMap` function for use in the `Pager` component is extremely vague. Without access to the KendoReact source code, it would have been near impossible.

First request: on the `GridProps` API page, the `pager` prop is defined as being the type "null" or `ComponentType<PagerProps>`. Please convert the text "ComponentType<PagerProps>" into a link to the `PagerProps` page. This will greatly aid in quickly linking to the appropriate documentation.

Second request (and the bulk of the feature request): please make (at least) the pager-related constants and default messages (string templates) available to consuming components. As of v5.4.0 of `@progress/kendo-react-data-tools`, the constants are exported from {kendo-react-private}/packages/datatools/src/messages/index.ts and they are consumed within the `Pager` (and subcomponents), but are not re-exported.

Not having access to the pager-related constants (`pagerInfo`, `pagerFirstPage`, `pagerPreviousPage`, `pagerNextPage`, `pagerLastPage`, `pagerItemPerPage`, `pagerPage`, `pagerOf` and `pagerTotalPages`) means it's a complete shot in the dark at how to write an override function to supply as the `messagesMap` prop. Not only that, but without access to the pager-related default messages (string templates) and given the way the `Pager`'s `render` method is written, we are unable to change just one or just a couple messages; we have to address all nine.

Right now in v5.4.0, the way the `Pager`'s `render` method is written, it simply checks to see if `messagesMap` is non-null (lines 214 through 223 of Pager.tsx, lines 38-43 of PagerInput.tsx and lines 36 and 37 of PagerPageSizes.tsx). This means that if we pass in a custom function for `messagesMap`, the custom function will be used to evaluate the message/string-template for `pagerFirstPage`, `pagerPreviousPage`, `pagerNextPage`, `pagerLastPage`, `pagerInfo`, `pagerPage`, `pagerOf`, `pagerTotalPages` and `pagerItemPerPage` (just in those three, aforementioned files). This means that we have to somehow know that `pagerInfo`, for example, will come through to the custom function as the string "pager.info" or that `pagerPage` will come through as "pager.page" so that the custom function knows which `messageKey` it's being passed so it can send out the object with the appropriate message/string-template as the object's `defaultMessage` property.

Instead, if the pager-related constants and default messages were exposed, we could very easily write a custom `messagesMap` function that could address any number of the nine default messages.

As an example, the Telerik/Kendo default string template for `pagerInfo` is "{0} - {1} of {2} items" that could be better scoped to the type of data the grid shows. Let's say the grid displays products and we'd like the pager to show "Displaying products 5 - 10 of 302" in the bottom right. If the pager-related constants and messages were exposed, this becomes a very simple task while not disturbing all other Telerik/Kendo default messages:

import React from 'react';
import { Grid, GridColumn, GridNoRecords, GridColumnMenuFilter } from '@progress/kendo-react-grid';
import { pagerInfo, pagerOf, messages as defaultPagerMessages, Pager } from '@progress/kendo-react-data-tools';

export default function MyComponent() {
    const customMessagesMap = messageKey  => {
        switch (messageKey) {
            case pagerInfo: return { messageKey, defaultMessage: 'Displaying products {0} - {1} of {2}' };
            default: return { messageKey, defaultMessage: defaultPagerMessages[messageKey] };
        }
    };

    const CustomPager = () => (
        <Pager
            skip={...}
            take={...}
            total={...}
            buttonCount={...}
            type="numeric"
            info={true}
            pageSizes={[...]}
            messagesMap={customMessagesMap}
    );

    return (
        <div className='my-component'>
            <Grid data={[...]} pager={CustomPager}>
                <GridColumn ... />
            </Grid>
        </div>
    );
};

Environment Details:
OS: Windows11 version 21H2 (OS build 22000.856)
Edge Browser version: 104.0.1293.47

Repro steps:
1. Open Code Pen: https://codepen.io/m1mrt/pen/VwXjEzJ page in Edge Browser.2. Run Axe dev tools3. Observe an issue that select element has an accessible name.

Actual Result:Select element does not have an accessible name.

scroll pagination is available in ListView but item selection is not there and in other side item selection is available in ListBox but scroll pagination is not availed, 

we have mostly very common and frequent requirement user can select a item from a big data list, where we need pagination to improve component performance.

this only we can achieve only if ListBox supports scroll pagination

Test Environment:

Is It Possible to Add Persian Datetime format In Datetime Picker

Thanks

In the Checkbox onChange callback, event.nativeEvent.target.checked seems to be set differently depending on whether the input was toggled by mouse click or by pressing space.

After clicking on the Checkbox, event.value and event.nativeEvent.target.checked will have the same value, consistent with the Checkbox's new state.

After pressing space with the Checkbox focused, event.value and event.nativeEvent.target.checked will have different values, with event.value containing the Checkbox's new state and event.nativeEvent.target.checked containing the Checkbox's old state.

I would expect event.nativeEvent.target.checked to be set the same way regardless of whether I am toggling the Checkbox with mouse or keyboard.  Furthermore, I would expect event.value and event.nativeEvent.target.checked to always be equal to each other.

I made a code sandbox to demonstrate the bug here: https://codesandbox.io/s/kendo-react-checkbox-bug-26f7ur

We are currently passing a React.Node which contains both text and custom icons to the DropDownButton text property. The automatically generated aria-label of the DropDownButton returns [object Object] instead of any recognizable text.

Steps to Reproduce:

• Create a DropDownButton with text property set to a React.Node - eg:
  

<DropDownButton text={<div>test text</div>}>

• Inspect the DropDownButton aria-label value using the developer console
  

Expected Result:

aria-label contains the text inside the React.Node

aria-label="test text dropdownbutton"

Actual Result:

aria-label contains [object Object]

aria-label="[object Object] dropdownbutton"

The current grouping implementation renders the resources in each parent group, making duplicates.

The request is for providing an option for grouping resources by adding child items to a specific parent item only (without duplicating them in each group). The UI could be something similar to the following (with collapse/expand functionality):

• https://doc.daypilot.org/scheduler/react/

The data tool Filter component allows me to build an AND/OR filter query. It has a button for adding additional Group objects for nesting query parameters.

Can you please add an option that disables that button so that the user can only add basic AND/OR filters? No additional Groups?

Thank you,

Ryan

Description:

When the NumericTextBox is set to "c0" format and has a value of 0 ($0), it doesn't capture the first digit entered.

Reproduction Steps:

1. Set the field value to 0 ($0)
2. Hit "Tab" to blur the field
3. Hit "Shift-Tab" to focus the field (field contents will be highlighted)
4. Enter "123"
5. Repeat steps 2 through 4

Browser:

Chrome -- Version 89.0.4389.114 (Official Build) (64-bit)

Expected Behavior:

• After step 4, field shows "$123"
• After step 5, field shows "$123"

Observed Behavior:

• After step 4, the field shows "$230"
• After step 5, the field (correctly) shows "$123"

Notes:

• This bug seems to occur when the field has a value of 0 ($0) before gaining focus
• This doesn't occur when the specified format is "c2" or "n0"

Code Snippet:

<NumericTextBox format="c0" />

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

I would like the occurrencesInRange function from jQuery to be implemented in KendoReact.

This allows calculating collisions with recurring events onDrag or onResize.

It appears the visible elements with the dataItem are available in the SchedulerViewItemsContext props. If this context were accessible with a hook perhaps that would be enough?

Thanks

Hello,

is it possible to do reorder/drag and grop grid rows with the keyboard? It doesn't look this is set up but I wanted to check if it is (or if it's something you will be adding at some point).

https://www.telerik.com/kendo-react-ui/components/grid/rows/row-reordering/#toc-kendoreact-dragdrop

Thanks,

Rebecca

Any chance you could provide simple sample code (stackblitz ideally) demonstrating how to combine multiple PDFExport's into a single PDF file?

The need to combine comes from wanting page numbering to start at 1 within each individual pdf render.

Totally open to using the lower level exportPDF from the drawing library... perhaps there's a straightforward path to combining the individual DataURI's?  also open to using additional 3rd party npmjs libraries.