Hi Telerik Support Team,

I would like to request a feature enhancement for the Kendo UI for Angular TreeList component, specifically regarding the selection mechanisms.

Feature Request:

Please consider adding a (selectAllChange) event emitter to the <kendo-treelist-checkbox-column> component, similar to how selection events are handled or how other advanced components expose header checkbox interactions.

Use Case / Motivation:

Currently, when a user clicks the "Select-All" checkbox in the header, it is difficult to intercept this specific action efficiently to run custom business logic, perform secondary async operations, or manually update external states that depend strictly on the "all selected/unselected" toggle.

While we can listen to general selection changes on the TreeList, having a dedicated (selectAllChange) event that emits the current state (e.g., true, false, or even a custom event object) would provide much cleaner control over the application state, especially in complex data-binding scenarios.

Proposed Syntax:

<kendo-treelist-checkbox-column 
    [showSelectAll]="true" 
    (selectAllChange)="onSelectAllChange($event)">
</kendo-treelist-checkbox-column>

This event would be useful to focus the editor on some specific scenarios like in the Dialog:

https://www.telerik.com/kendo-angular-ui/components/knowledge-base/focusing-editor-inside-dialog

It currently relies on a short delay, which might differ depending on the machine.

Ability to customize the fields control of the FilterExressions:

The multiCheckbox filter popup in the Grid sorts its distinct-value list using JavaScript's native string comparison, which orders characters by Unicode code point. This produces correct results for ASCII-only data but breaks for any locale whose alphabet includes characters outside the ASCII range (Turkish İ/Ğ/Ş/Ö/Ü/Ç, German ä/ö/ü, Czech/Polish diacritics, etc.).

The request is to sort the filter item list using locale-aware comparison (`String.prototype.localeCompare`) so that values appear in the correct alphabetical order for the active language, or provide a custom way to order the filter options.

Hi,

in the ListBoxComponent, there is the concept of custom messages, by which a "noData" message can be set:

https://www.telerik.com/kendo-angular-ui/components/listbox/api/custommessagescomponent#nodatatext

A similar concept would be beneficial for the ListView (https://www.telerik.com/kendo-angular-ui/components/listview), so that we can show a message in here as well in case no data is available.

Thanks,

Felix

When a DropDownList is configured with both sticky headers and grouping, the first group header is rendered twice when opening the component - once as the sticky header and once as part of the list.

Currently, there is no built-in way to suppress this duplicate. Achieving the desired appearance requires custom CSS styles, and in cases where virtual scrolling is enabled, custom DOM manipulation of internal elements is needed, which causes side effects and edge cases.

Enhancing the DropDownList with a built-in option for achieving this would allow developers to control this behavior without relying on unsupported workarounds.

Hi,

Please provide a template for the operators of the FilterExressions.

thanks

Currently, the (X) close button is always shown and visible. In other words, it is not possible to configure the dialog component to NOT display this icon button. It is actually not just about the icon button, but also the ESC shortcut. It should not be possible to close the dialog when the input is set.

Feature request: Add an input `closable` for the Dialog Component ('kendo-dialog') to be able to turn off the closable behaviour. Example:

```html

  <kendo-dialog [closable]="false"></kendo-dialog>

```

The "closable" is `true` by default, ensuring that it is backwards compatible.

Use case: A certain dialog is presented to the user and user must NOT be able to close/ignore the dialog. The user is thus forced to resolve the instructions presented in the dialog and resolve it the intended way.

It would be great if the <kendo-listbox> had the possibility to take in a list of selected values, which causes the matching items to be selected.

Currently, the only option I see is to inject the ListBoxComponent as viewChild, and call .select manually, which is quite cumbersome.

Suggestion:

- additionally to the "textField", provide a "valueField" property

- also add a "selectedValues" property, which takes in an array / signal of value properties, which then are automatically selected, whenever its value changes.

See https://www.telerik.com/kendo-angular-ui/components/listbox/api/listboxcomponent

Due to the internal mechanism by which the Scheduler displays events per day, some events are shrunk without reason, because others are shrunk due to overlap.

In the following screenshot, the Scheduler Event 1 has enough space to occupy the entire column, but is shrunk the same as Event 2 (which is shrunk due to the overlap with Event 3). Internally, each day use column separation logic to distribute the events. Since all three events fall into the same slot, the entire column is divided by 3 and events are distributed among them. Since Event 1 is the first event, it has been shown in the first 1/3. This isn't optimal, as this case proves it.

Here is how Kendo Scheduler behaves compared to Google Calendar in this case





Google Calendar

Please provide a way to disable the months or years when displaying months or years in the Calendar. The disabledDates callback function could be evaluated for these views.

Thank you

This will enhance the PDFViewer usability as the Toolbar provides many built-in features like responsiveness, tool customizations, etc., which will add extra value to the component.

The component is already used internally in the Editor and Spreadsheet.

Provide an option to dynamically remove a PDF file from the PDFViewer (a method, property, or a built-in toolbar tool).

When the PDF is removed, show the default blank page or the custom kendoPdfViewerBlankPageTemplate.

The Angular Grid export only includes PDF and Excel formats. Requesting an enhancement to be able to export to CSV for purposes of opening the data in a text editor other than Excel or to allow for easier upload into other applications.

There are articles that show how to do this but it would be better out of the box from Telerik.

https://stackblitz.com/edit/kendo-angular-grid-csv-export?file=app/app.component.ts

https://www.codeproject.com/Articles/5162666/CSV-Export-In-Angular-with-Kendo-Control