Unplanned
Last Updated: 20 Jul 2020 14:23 by ADMIN

All parts of the TreeViewItem (indicator, text, checkbox) are defined as one big template. Therefore customization of only one part of the template still requires retemplating the whole item. 

When retemplating is applied to the treeviewitem and  20+ children in the nodes are loaded, the result is as follow: If you run that on iOS and expand a node you'll see that it crunches the UI for a few seconds and then loads the child nodes, but i also see on our application that it will crash some times and either way gives a bad feel to the UI on iOS

Unplanned
Last Updated: 17 Jul 2020 10:51 by ADMIN

When we call ScrollItemIntoView to scroll to one of the nodes at the bottom of the tree the app will crash with a "Unspecified Error".

I've set it to load 150 nodes into the tree and when you click the "Test" button it will error (using UWP). If you change it to only load 100 nodes or less it should work.

Completed
Last Updated: 24 Jun 2020 12:09 by ADMIN
Release R2 2020 SP

I am using treeview loadondemand, doing an api call for every node that I open. I noticed that when I tried to open an item with 33 children object, it hangs the application.

The issue occurs when TreeViewItemTemplate is used.

Without the itemtemplate no issues.

Completed
Last Updated: 13 May 2020 13:16 by ADMIN
Release R2 2020

Above the TreeView there is a Telerik.SegmentedControl, with two segments. If I click on one of the segments the ItemsSource of the TreeView gets updated by using .Add() or Remove() of the ObservableCollection.

If every Segment is called for the first time there is no problem. But if I want to clear all Items and display the empty treeView I get the following Exception.
Java.Lang.IndexOutOfBoundsException: 'Inconsistency detected. Invalid item position 0(offset:-1).state:14 md5a5af569a83c1a3f5c3a8a63bd7d39860.RadExtendedListView{c6376f1 VFED..... ........ 0,0-1200,840 #5}, adapter:com.telerik.widget.list.ListViewWrapperAdapter@b30041b, layout:android.support.v7.widget.LinearLayoutManager@3fd42d6, context:md5db22775bb305bf9756607f4261793d51.MainActivity@1d6cd4f

Completed
Last Updated: 13 May 2020 13:03 by ADMIN
Release R2 2020
If items are loaded on demand and treeview is placed inside StackLayout, when collapsing and expanding items, at some point the rendering is messed up.
Duplicated
Last Updated: 07 Apr 2020 09:00 by ADMIN

Scrolling a TreeView with expandable items on iOS causes items to randomly change position in the control and prevent items from being selected.
This renders the control unusable on iOS when expandable items are present.

I've attached a basic project that demonstrates the issue.
The project just needs the latest Telerik binaries added to it. They were too large to include.

I believe this is the same issue Martin was experiencing in the comments of https://feedback.telerik.com/xamarin/1427193-treeview-ios-wrong-visualization-with-custom-itemtemplate

Completed
Last Updated: 19 Feb 2020 16:04 by ADMIN
Release R1 2020 SP1
Created by: Safan
Comments: 0
Category: TreeView
Type: Bug Report
11
When you have longer text shown in TreeView items and it is wrapped in 2 or 3 rows, the text is clipped incorrectly.
Completed
Last Updated: 19 Feb 2020 16:03 by ADMIN
Release R1 2020 SP1
Created by: VPS
Comments: 0
Category: TreeView
Type: Bug Report
12
Currently if the TreeView has deeper hierarchy or items with longer text, the end user will not be able to scroll horizontally.
Completed
Last Updated: 19 Feb 2020 16:00 by ADMIN
Release R1 2020 SP1
When we remove the last item from the observable collection we get an unhandled exception like this:

"Attempt to delete item 0 from section 0 which only contains 0 items before the update"
Completed
Last Updated: 15 Jan 2020 12:10 by ADMIN
Release R1 2020
When you have custom ItemTemplates defined with different height, scrolling up through the items causes flickering, also you cannot scroll down to display all the items.
Declined
Last Updated: 06 Jan 2020 10:00 by ADMIN
Created by: Bruce
Comments: 5
Category: TreeView
Type: Bug Report
2

The documentation notes that the TreeView should have its items default as IsExpanded=False, however, everything is expanded when I start my TreeView. This also includes the situation when I have a TreeView with a custom template (provided by the excellent people at Telerik, for dealing with cutoff expander icon issue!) and if I try to set Expanded explicitly to False via the template and viewmodel.

This seems to be pretty basic and I have to wonder if I'm not doing something correctly.

Thanks. 

Unplanned
Last Updated: 26 Nov 2019 13:47 by James
Currently this could be accomplished through methods.
Completed
Last Updated: 19 Nov 2019 12:07 by ADMIN
Release 2019.3.1119 (R3 2019 minor release)
When using MvvmCross framework to load data when the View appears on the screen the ListView cannot be scrolled. It starts jumping rapidly instead.

Workaround:
Load the data in the constructor of the respective ViewModel instead inside its ViewAppearing() method.
Unplanned
Last Updated: 01 Nov 2019 08:45 by ADMIN
Created by: Werner
Comments: 0
Category: TreeView
Type: Bug Report
0
If customers try to load struct or readonly struct into the TreeView, the items does not get displayed.
Completed
Last Updated: 23 Oct 2019 12:26 by ADMIN
Release R3 2019 SP
when custom renderer is registered, it is not applied to the TreeView control. The default one overrides the custom one.
Unplanned
Last Updated: 08 Oct 2019 09:24 by ADMIN
If there is an input control (Editor, Entry) inside the ItemTemplate of the TreeViewDescriptor and its Text is bound to any property of the data item, changing the ItemsSource of the TreeView raises an exception of type AccessViolationException.
Completed
Last Updated: 23 Sep 2019 18:31 by ADMIN
Release R3 2019
When the custom ItemTemplate sets bigger value of its Height e.g. more than 44 pixels, the content of the UITreeViewCell is not sized correctly. Only the cell gets the correct value.
Unplanned
Last Updated: 13 Sep 2019 10:37 by ADMIN

Please let us know:

  • Should the color be applied to the expand indicator as well, or should there be a separate property for this
  • Should the color be applied to the checkbox as well, or should there be a separate property for this
Completed
Last Updated: 28 Aug 2019 10:14 by ADMIN
Release 2019.2.708 (R2 2019 minor release)
When there is custom template applied that hosts multiple rows of UI components with total height greater than 44, the template is not measured correctly, leading to wrong visualization.
Completed
Last Updated: 19 Jun 2019 12:47 by ADMIN
Release R2 2019 SP1
When TreeView has a source with more than 120 items and is placed inside a StackLayout, it is not properly rendered (Layout Cycle Detected exception is raised).
1 2