When you have a very long list of items to display in the tree view its not always ideal to have a vertical scroll.  In order to better utilize space and allow for the user to see more options on the screen at once it would be nice to have a configuration to allow for the list to be split up into columns.  So for example if you have a list of 90 items, you can maybe have 3 columns of 30 items each.  Please see the attached image that demonstrates what I am referring too.  

The Kendo Silverlight does have something similar: https://docs.telerik.com/devtools/silverlight/controls/radtreeview/how-to/create-horizontal-treeview

Request related to - https://github.com/telerik/kendo-angular/issues/3452

Currently, the default filtering mode, known as "lenient", halts its search as soon as a match is identified, showcasing all child elements of that match irrespective of their correspondence with the filter term. However, due to this design, using "lenient" mode while simultaneously auto-expanding child elements matching the filter term is not feasible.

In the "lenient" mode, the algorithm terminates its comparison upon encountering a match. Consequently, utilizing "lenient" mode along with automatic expansion of potential child matches requires switching to the "strict" filtering mode. This compels the algorithm to perform comprehensive comparisons throughout the entire tree, ensuring explicit identification and expansion of all matches.

https://stackblitz.com/edit/angular-5oxrjd-m3qsi6?file=app%2Fapp.component.ts

An enhancement can be introduced by incorporating a setting that drives the algorithm to perform exhaustive comparisons even within "lenient" mode, introducing the capability to expand matches while maintaining the current operational design.

Provide an option to specify the drag target.

Currently, we can click anywhere on the item and drag it. But there are scenarios where the items should be draggable only when clicking an icon.

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

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,

 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

My suggestion for the Angular treeview is to expose a doubleClick event, as opposed to just the single click event (or the selection node event).
This would help in preventing events from firing unless the user has double clicked a node (as an option).

[isDisabled]="disabled || isDisabled(node, nodeIndex(index))"

Because of the hardcoded disabled property, isDisabled cannot be reliably used to control which item is disabled.

Disabling the parent node automatically disables the entire tree under it and isDisabled is never called for those items.

It should behave like other functions - isChecked, isExpanded, isVisible etc - where you have full control over which item does what.

Hi,

Please provide a property that can be used to associate the node pageSize with a specific property of the data items.

thanks

Hi,

Please provide an option that allows exposing the TreeView nodes' indexes. Such a feature will be especially helpful when rearranging the TreeView nodes by dragging.

Thank you

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

Please provide an optional callback function when rebindChildren has finished and the tree is stable again.

Thanks

Hi,

I was going through Treeview in angular 5.
What I feel lacking in Treeview is search functionality.

I would be very thankful if you can provide search functionality.

Thanks

Hello,

Do You have plans, to provide extended 'desktop-like' multiselection of nodes with ctrl/meta or shift key pressed?

It would be useful if the TreeView can support the Angular Routing feature, for example allowing to set a RouterLink directive for each item of the tree.

support r-click menu