Hello,

We found a bug in the latest version of Kendo related to the reordering columns in Treelist when inside a Grid DetailTemplate

See the Dojo below to replicate the problem:

https://dojo.telerik.com/exotEsej

Expand the detail row under a grid row and attempt to drag one of the treelist column titles to the left or right and note that an error is thrown.

Uncaught TypeError: Cannot read properties of undefined (reading 'lockable')

Let us know when you have a workaround for this as it prevents us from promoting this version of Kendo to our production environment.

Thank you,

Brad Garner

Setup a Treelist with paging

edit set to popup

get "Maximum call stack size exceeded" error after update

I removed the paging and it works as expected

Please consider adding persis selection functionality to the TreeList. Such is available in the Grid:

https://docs.telerik.com/kendo-ui/api/javascript/ui/grid/configuration/persistselection

Hi Team,

I'd like to request the functionality to filter only parent records and not the child's records.

Thank you!

The Kendo TreeList has an incorrect colspan value for the headers when the first column is hidden and the file is exported to Excel.

Dojo:

https://dojo.telerik.com/IFuCutaV/4 

The names of the headers are not displayed in the correct positions.

Bug report

TreeList autoFitColumn doesn't work properly.

Reproduction of the problem

Run the first sample from here:
https://docs.telerik.com/kendo-ui/api/javascript/ui/treelist/methods/autofitcolumn

Alternatively, open this dojo:
https://dojo.telerik.com/uvafiZeh

Current behavior

Expected/desired behavior

TicketID:

1519223

Hi Team,

I would like to request the Kendo UI TreeList to have an optional setting to show aggregate values at the parent row based on the children's aggregates.  

Thank you!

Bug report

TreeList with TextArea editor and locked columns do not align row height between locked and non-locked tables

Reproduction of the problem
1, Open below Dojo
2. Click on a cell within the locked table to edit

https://dojo.telerik.com/UwUmoWOX

Current behavior
Clicked locked row height not aligned with the row height of the non-locked row

Expected/desired behavior
TreeList with TextArea editor and locked columns shall align rows between locked and non-locked tables

Workaround:

$("#treelist").getKendoTreeList()._syncLockedContentHeight();

• https://dojo.telerik.com/EMajaCUY

Environment
Kendo UI version: all
jQuery version: x.y
Browser: [all | Chrome XX | Firefox XX | IE XX | Safari XX | Mobile Chrome XX | Android X.X Web Browser | iOS XX Safari | iOS XX UIWebView | iOS XX WKWebView ]

Hello,

We have a grid of tasks and each row has a detail's pane (hierarchy) that shows, when expanded, a tree list of sub-tasks.

If you attempt to delete a tree list node (not the last) it will delete the node correctly, but will trigger the grid's to prompt the user to make sure the item should be deleted or not (which is NOT normal). But when this is shown, it is already too late to Cancel has the tree list has already deleted the item. Users don't understand why they are given a chance to prevent the deletion, but it does not work.

So in short, we want the tree list, when the users deletes a node, to not trigger (i.e. to prevent) the grid's item deletion.

Here is a dojo that shows what happens:

https://dojo.telerik.com/APaXoRuR

1. Load the Dojo and open the Network tab of the developer toolbar
2. Expand one of grid's detail row
3. Attempt to delete one of the tree list items (except the last item)
4. Note the dialog popup which is not normally shown for a treelist
5. Note the Item is already deleted anyway... before the popup is shown...
6. Click Cancel on the dialog
7. The item disappears even if you did cancel

Please let me know if you need more information,

Regards,

Eric.

Eric Boulé, B.Eng.
Solution Architect
Centre d’Essais Techniques de la Qualité (CETQ) | Quality Engineering Test Establishment (QETE)
Department of National Defence / Government of Canada
Eric.Boule@forces.gc.ca

Add persistSelection property in the Kendo UI TreeList similar to the persistSelection in the Kendo UI Grid:

https://docs.telerik.com/kendo-ui/api/javascript/ui/grid/configuration/persistselection

### Bug report

The change event is not triggered, when a checkbox is selected in the Keno UI TreeList widget.

### Reproduction of the problem

1) Create a checkbox selectable TreeList widget;

2) Select/check any of the checkboxes;

3) The change event is not triggered;

4) Unselect/uncheck any of the checkboxes;

5) The change event is triggered;

A Dojo sample for reproduction: https://dojo.telerik.com/EWUFOhip

### Expected/desired behavior

The change event should be triggered, when a checkbox is selected in a checkbox selectable TreeList widget.

### Environment

* **Kendo UI version:**2021.1.119
* **jQuery version:** 1.12.4
* **Browser:** [all]

### Bug report

When custom classes are set via the headerAttributes of the column and the showColumn is called, the predefined classes are wiped away

### Reproduction of the problem

1. Set custom class via headerAttributes.

2. Call the showColumn method.

3. Custom classes are wiped away.

Dojo sample for reproduction:

https://dojo.telerik.com/UJalevej

### Expected/desired behavior

The classes should be retained after the method is called.

### Environment

* **Kendo UI version:** 2021.1.119
* **jQuery version:** 1.12.4
* **Browser:** [all]

Bug report

TreeList Drag and drop row to the bottom of the list does not work when the bottom item has no children

Reproduction of the problem
1. Open the following Dojo: 

https://dojo.telerik.com/eTiZONIj

2. Drag Jane and Drop it under Maria

Current behavior

Jane goes above Maria
Expected/desired behavior
Jane shall be placed at the bottom of the list under Maria

Environment
Kendo UI version: 2020.3.1118
Browser: [all]

### Bug report

When the columns of the Kendo UI TreeList have the attributes option set, a JavaScrip error is thrown. 

### Reproduction of the problem

1. Set the attributes property for any of the columns in the TreeList.

2. Call the setOptions() method.

3. An error in the console is present.

https://dojo.telerik.com/OKUnEDiJ

### Environment

* **Kendo UI version:** 2020.3.1118
* **jQuery version:** 1.12.4
* **Browser:** [all[]

When aggregate sum few child's rows the parent row not calculate only at the bottom of the treelist grid.

First I thought there is a problem in my code, after search I found this post.

I have fixed the data type but as I said the parent not include in the sum group only at the bottom total.

link : https://stackoverflow.com/questions/34848829/kendotreelist-aggregate-not-working-properly.

Thanks

Bug report

Ticket ID: 1489274

The TreeList reorderable functionality does not work when using a different field name for the parentId (not the default parentId).

Reproduction

In the example below the treelist with parentId: ''parentId" works well when you drag Carla under Ashley. But in the second treelist, Carla disappears 

[Dojo]

Environment

* **Kendo UI version:** 2020.3.915

Hi Team,

I'd like to request the functionality to drag the column header of a Kendo UI TreeList and dropping it in a grouping section to make the TreeList Groupable. 

Similar to the Kendo UI Grid:

Thank you!

The grid dataBinding event exposes useful information like the action, based on which I can implement my logic.

The treeList equivalent only has the sender, making it virtually useless.