We are trying to scroll treeview to item that should be selected after page load (and tree automatic expand). Provide a built-in way to scroll to a programmatically selected item.

Please provide a built - in feature that allows to achieve the behavior demonstrated at the following link:

https://www.lidorsystems.com/support/articles/angular/treeview/treeview-compact-view/

thank you

Hi,

 

  We are facing a notable poor performance in tree view when loading about 1500 tree nodes with custom template and it is taking approximately 32 Seconds to load it. You have already provided load more option to virtualize data but this is not so user friendly and suggested listview which has virtualization also not good fit to replace treeview.  I wonder how this virtual scroll is missed in tree view!!. It is very important component to our project If you could provide this feature will be great.

 

Thanks& regards,

Ramesh M

I'm aware of the solution described https://www.telerik.com/forums/is-there-a-way-to-set-a-treeview-busy-like-grid's-loading but it would be nice to have a way to control build-in loading indicator instead of implementing a custom one.

 

In a scenario when the data is stored in the state and fetch children immediately returns empty observable and then when data is available and emitted to the source observable you can't see the loading indicator.

An example:

https://stackblitz.com/edit/angular-wtvg2h?file=app/categories.service.ts

Click to expand a category, the "expand" icon is changed to "expanded" but no data is available yet. Two seconds later when data arrives it looks fine, but it would be really good to improve users experience and show a build-in loading indicator while data is not yet available

If you expand a tree node with 1000 items in it, and that tree has an ng-template the performance is very poor. It takes 7 seconds on my machine, see here https://www.telerik.com/forums/slow-treeview-with-large-datasets

Please add virtualisation to the TreeView so that not so many DOM elements (and therefore ng-templates) need to be created.

Hi,

 

 The tree view enables us to drag and drop one item at a time. we have a scenario where i want to drag and drop multiple items. tree view also enables multiple selection of items but not supporting drag and drop of multiple items. Could you please provide some solution to dag and drop multiple items

 

 

 

Hi,

 

 The tree view enables us to drag and drop one item at a time. we have a scenario where i want to drag and drop multiple items. tree view also enables multiple selection of items but not supporting drag and drop of multiple items. Could you please provide some solution to dag and drop multiple items

 

Thanks& regards,

Ramesh M

Provide an option to adjust the drag and drop sensitivity, by requiring more mouse movement before the drag event is fired.

Treeview filter(with checkboxes)

 

Hi Team,

 

There is a filternodes option available but not with checkboxes. Would be glad to have Treeview filter(with checkboxes) something similar kenod jquery component(attached the link and screenshot for your reference). Is there any plans to release this feature in near future? 

 

 

When using the "checkBy" attribute to configure the data field for the key definition, then the indeterminate state of parent nodes is broken.

To reproduce the issue have a look to this StackBlitz: https://stackblitz.com/edit/angular-okpokx

The functionality we would love to see is the ctrl+click/shift+click functionality for selecting checkboxes more efficiently. The reason for this is in several use cases, our users will have 100+ items to select under a single parent. In many cases, they will need to select about 1/2 of them. So the only option at that point will be to select all 50 or select the entire parent and 50.

Having a mechanism to more efficiently select/ (such as shift+click) would be ideal.