Hello,

We encountered a problem inside our app while using the kendo-treelist component.

As shown in the video attached, we use a template to edit the values in the tree, which is either kendo-dropdownlist or kendo-numerictextbox. At the press of the kendo-icon-wrapper, which contains that arrow SVG icon (for increasing/decreasing the value or selecting from the dropdown), the whole row will either collapse or expand depending on the current state that it has.

From debugging, we believe that because the same SVG icon has been used, it might trigger the collapsing/expanding.

After adding a kendo-icon-wrapper component inside that cell, we could observe the same behaviour when pressing next to the 'test' text.

We are looking for a solution to this problem.

Thank you in advance.

Setting the initial TreeList selection, or clearing it programmatically, does not seem to update the Select All checkbox.  Is there a way to programmatically do it?
I am using row selection as described in these pages:

https://www.telerik.com/kendo-angular-ui/components/treelist/selection/row-selection#select-all-checkbox

https://www.telerik.com/kendo-angular-ui/components/treelist/selection/persisting#persisting-row-selection-based-on-a-specific-field

Thanks.

I have a kendo-treelist in Angular

Edit mode has only Number, Text or boolean,

I need to make it custom select instead.

Is there any one who knows how?

I am a newbee in Kendo Components and need advice on selecting the right component.

I want a grid or tree representation of something like a book with the following structur.

- Book 1

-- Chapter 1

--- Subchapter 1

---- Line 1

---- Line 2

--- Subchapter 2

---- Line 1

---- Line 2

- Book 2

-------

-------

There are about 18 books. Some books divide lines in both chapters and subchapters. Other books only divide by chapters. So using a Grid can be a problem since setting groups = 'book, chapter, subchapter' would mean that books that dont use subchapters will be presented with an empty group for subchapter

I have tried using Master-Detail grid with 4 levels af grid (see the picture). This actually seem to work but will require a lot of styling to get rid of unwanted space. And there is the issue of a bit difficult navigation betwwen the levels.

Would it be better to use a treelist or treeview.

Hello everyone

I would like to persist the selection of columns in a kendo treelist, such that when a user reloads the page their selection of columns remains the same.

Is there a way of hooking into the events that take place when a selection is applied?

For example, in the picture attached, if the user were to select to display 'Description Two' and hit apply, then I would like for all three columns to be displayed on next reload. Likewise if a user were to hide both Description columns, then only the 'Name' column would be displayed on next reload. All three would still show up in the column chooser in this example, just that two of them would be turned off.

What might I do to achieve this in Angular15?

Best regards

Hey guys,

I have an angular form that contains two tree lists: the first one is hierarchal and the 2nd is flat.  Both are populated using [kendoTreeListFlagBinding] and both render correctly.  The first tree list is hierarchal and the second is flat.  Yay Kendo!!

The issue is when I go to export from the flat treelist, it exports hierarchal and not flat.

First Treelist

code for the column defs etc

second Treelist

code for the column defs etc

What I need is the "directive" to tell excel to export the data as a flat list.

What am I missing from the doc

Thanx Kyle

Hi, 

please help to set k-selected class on expand/collapse event in treeList (angular 16 app).

By default rows are highlighted on select event (k-selected class applied), but I need to highlight it on expand, collapse, select events.

I was trying to use rowCallback for setting/removing selected class and expand/collapse events for getting selected row id, but currently several rows are staying selected at the same time when should be selected only one (from the last action). Am I missing something, or is there a better approach?

rowCallback = (context) => {
return this.zone.run(() => {
if (context.dataItem.id === this.selectedNodeId) {
return {
'k-selected': true
      }
    }
else if (context.dataItem.id === this.previousSelectedNodeId) {
return {
'k-selected': false
      }
    }
  });
}
onAction(e) {
this.zone.run(() => {
const row = this.treeList.view.data.find(dataItem => dataItem.data.id === e.dataItem.id);
if (row) {
this.previousSelectedNodeId = this.selectedNodeId;
this.selectedNodeId = row.data.id;
    }
  });

}
 
<kendo-treelist #treeList kendoTreeListExpandable kendoTreeListSelectable
  [data]="(loadNodes$ | async)"
  [fetchChildren]="fetchChildren"
  [hasChildren]="hasChildren"
  (selectionChange)="onSelectionChange($event)"
  [rowClass]="rowCallback"
  (expand)="onAction($event)"
  (collapse)="onAction($event)">
                                                            

<kendo-treelist
  class="kendo-treelist"
  [kendoTreeListFlatBinding]="data"
  #directive="kendoTreeListFlatBinding"
  [rowClass]="dynamicClass"
  [parentIdField]="parentIdField"
  [idField]="idField"
  kendoTreeListExpandable
  kendoTreeListSelectable
  [rowReorderable]="true"
  (cellClick)="onCellClick($event)"
  [itemKey]="idField"
  [(selectedItems)]="selected"
  [(expandedKeys)]="expandedIds"
  [isExpanded]="isExpanded"
  (expand)="onExpand($event)"
  (collapse)="onCollapse($event)"
  (rowReorder)="onRowReorder($event)"
  [loading]="data.length == 0"
  >
  <kendo-treelist-rowreorder-column [width]="25"></kendo-treelist-rowreorder-column>    
  <kendo-treelist-column
    *ngFor="let column of treeListOptions.columns" 
    [field]="column.field" 
    [expandable]="column.expandable" 
    [title]="column.title"  
    [width]="column.width">
    <ng-template *ngIf="column.ngTemplate" kendoTreeListCellTemplate let-dataItem let-rowIndex="rowIndex">
      <!-- Context values will be accessible for column customization on the parent component. -->
      <ng-container *ngTemplateOutlet="template; context: { dataItem, rowIndex, column }"></ng-container>
    </ng-template>
  </kendo-treelist-column>
</kendo-treelist>

Hi,

I am using Kendo Treelist Angular with 'kendoTreeListFlatBinding'. Mock data is also attached. There could be multiple folders and each folder can have multiple templates in it. I want to use row-reorder on my tree-list component.

After enabling rowreorder. I have following scenarios to deal with:

1. Template is reordered within the same Folder - Positions of all templates will be changed in this case. 
2. Template is reordered into some other Folder - Parent id of dragged template and Positions of all templates in target folder will be changed.
3. Folder is reordered into some other Folder - parent id of dragged template and its child templates will change and Positions of all templates in target folder will be changed.