Applied Font Styles for every Node not loaded correctly - all have a defaul value

Setting this before the tree is drawn generates a StackOverflowException. If you leave this commented out, and set this property on Form Load, the tree will appear and function correctly. If however you then add a node, the same exception appears.

RadTreeView - DragOverNode event not contains property to determine the drop postion over target node

e.Direction is obsolete

add / remove / clear from RadTreeView control or external source

BringIntoView() does not work on multiselect TreeViews. The property MultiSelect = true

When I try to build a sample application to repro it works fine everytime, except in my main application. In this one it constantly goes wrong. GetNodeByPath works only when I search for the rootnode, for every other child node it returns 'nothing'.

Remove operation not work in sorted unbound treeview

To reproduce:
- Add RadTreeView to a blank form.
- Set its AllowDragDrop and AllowDefaultContextMenu properties to true.
- Clear the menu items in the  ContextMenuOpening event.
- You will notice that the Copy, Cut and Paste items are not removed.

Workaround:
 void radTreeView1_ContextMenuOpening(object sender, Telerik.WinControls.UI.TreeViewContextMenuOpeningEventArgs e)
{
   
    e.Menu.DropDownOpened -= Menu_DropDownOpened; 
    e.Menu.DropDownOpened += Menu_DropDownOpened; 
}

void Menu_DropDownOpened(object sender, EventArgs e)
{
    TreeViewDefaultContextMenu Menu = sender as TreeViewDefaultContextMenu;

    for (int i = Menu.Items.Count - 1; i >= 0; i--)
    {
        if (Menu.Items[i].Name == "Copy" || Menu.Items[i].Name == "Cut" || Menu.Items[i].Name == "Paste")
        {
            Menu.Items.Remove(Menu.Items[i]);
        }
    }
}

The disabling of the scroll bars is broke as shit.

I have tried 

    rtvDrainage.HorizontalScroll.Visible = false;
          rtvDrainage.HorizontalScroll.Maximum = 0;
          rtvDrainage.HorizontalScroll.Enabled = false;
          rtvDrainage.AutoScroll = false;
          rtvDrainage.EnableDeferredScrolling = false;
          rtvDrainage.EnableKineticScrolling = false;

          
          rtvDrainage.HScrollBar.Maximum = 0;
          rtvDrainage.HScrollBar.Visibility = Telerik.WinControls.ElementVisibility.Collapsed;

NOTHING stops this damn thing from showing up (i put this in both the load and in a button to hit after loading)

2 hours wasted trying to make a scroll bar not show up.........

To reproduce:
- Add treeview to a form and set its AutoScrollOnClick property to false.
- click a node that is not entirely visible with the right mouse button.
- You will notice that the view is auto scrolled.

Add a RadTreeView with several hierarchy levels. Initially all nodes are collapsed. When you collapse each child node deeper in the hierarchy, use the following code snippet:

public Form1()
{
    InitializeComponent();

    radTreeView1.CollapseAll();
    radTreeView1.TreeViewElement.AutoScrollOnClick = false;
}

private void radTreeView1_NodeExpandedChanged(object sender, RadTreeViewEventArgs e)
        {
            if (e.Node.Expanded)
            {
                e.Node.LastNode.EnsureVisible();
                radTreeView1.BringIntoView(e.Node.LastNode);
            }
        }
		
The last child node is visible, regarding the height, however, the entire node is not visible, regarding the width.

Workaround: use RadTreeView.MouseUp event instead.

private void radTreeView1_MouseUp(object sender, MouseEventArgs e)
{
    if (e.Button == MouseButtons.Left)
    {
        TreeNodeExpanderItem expander = radTreeView1.ElementTree.GetElementAtPoint(e.Location) as TreeNodeExpanderItem;
        if (expander != null && expander.Expanded && expander.NodeElement.Data != null)
        {
            radTreeView1.BringIntoView(expander.NodeElement.Data.LastNode);
        }
    }
}

The images and SignStyle cannot be modified using Visual Style Builder.

In RadTreeView, if AllowPlusMinusAnimation property is true and LoadOnDemand is true as well, plus/minus symbols disappears.

Font settings for particular node made by Property Builder are washed up if the Property Builder is opened again.

To reproduce:
- Add a RadTreeView which have parent and child nodes to a form.
- Expand nodes until the both scrollbars are simultaneously shown.
- You will notice that you cannot scroll to the last item.

Workaround:
- Subscribe to the following ScrollerUpdated event handler:

void Scroller_ScrollerUpdated(object sender, EventArgs e)
{
radTreeView1.TreeViewElement.InvalidateMeasure();

}

- You can subscribe to this event with the following line of code:
radTreeView1.TreeViewElement.Scroller.ScrollerUpdated += Scroller_ScrollerUpdated;

To reproduce: 
Add a RadTreeView to a form and use the following code:
private List<EntityA> entities = new List<EntityA>(); public Form1() { InitializeComponent(); radTreeView1.TriStateMode = true; entities = new List<EntityA>(); for (int i = 0; i < 10; i++) { var newEntityI = new EntityA(i.ToString()); for (int j = 0; j < 100; j++) { var newEntityJ = new EntityB(j.ToString()); for (int k = 0; k < 1000; k++) { var newEntityK = new EntityC(k.ToString()); newEntityJ.Entities.Add(newEntityK); } newEntityI.Entities.Add(newEntityJ); } entities.Add(newEntityI); } } private void checkBox1_CheckedChanged(object sender, EventArgs e) { foreach (var node in radTreeView1.Nodes) { node.Checked = checkBox1.Checked; } } private void radTreeView1_NodesNeeded(object sender, NodesNeededEventArgs e) { if (e.Parent == null) { foreach (var entity in entities) { e.Nodes.Add(new RadTreeNode(entity.Name, false) { CheckState = ToggleState.Off, Tag = entity }); } } else if (e.Parent.Tag is EntityA) { var currentEntity = e.Parent.Tag as EntityA; foreach (var entity in currentEntity.Entities) { e.Nodes.Add(new RadTreeNode(entity.Name, false) { CheckState = e.Parent.CheckState, Tag = entity }); } } else if (e.Parent.Tag is EntityB) { var currentEntity = e.Parent.Tag as EntityB; foreach (var entity in currentEntity.Entities) { e.Nodes.Add(new RadTreeNode(entity.Name, false) { CheckState = e.Parent.CheckState, Tag = entity }); } } else if (e.Parent.Tag is EntityC) { } } 
Put a breakpoint in the last If statement, you will notice that the breakpoint is being hit, while it is not if the TrieStateMode is set to false 

Workaround: 
Use the following custom RadTreeNode: 
public class MyTreeNode : RadTreeNode { private FieldInfo triStateField; public MyTreeNode() : base() { } public MyTreeNode(string text) : base(text) { } public MyTreeNode(string text, RadTreeNode[] children) : base(text, children) { } public MyTreeNode(string text, bool expanded) : base(text, expanded) { } public MyTreeNode(string text, Image image) : base(text, image) { } public MyTreeNode(string text, Image image, bool expanded) : base(text, image, expanded) { } public override ToggleState CheckState { get { return base.CheckState; } set { bool set = false; if (this.TreeViewElement != null && this.TreeViewElement.TriStateMode) { if (this.triStateField == null) { this.triStateField = typeof(RadTreeViewElement).GetField("triStateMode", BindingFlags.Instance | BindingFlags.NonPublic); } triStateField.SetValue(this.TreeViewElement, false); set = true; } base.CheckState = value; if (set) { this.triStateField.SetValue(this.TreeViewElement, true); } } } }

To reproduce: Add a RadTreeView with hierarchical data. Select a node with hierarchy level > 0. Call the Clear method of the Nodes collection. Refill the tree, drag and drop a node, you will see that two nodes will be dropped since the previous node's Selected property is set to true. 

Workaround: private void DetachAllNodes(RadTreeNode parent) { this.CleanNode(parent); foreach (RadTreeNode node in parent.Nodes) { this.DetachAllNodes(node); } } private void CleanNode(RadTreeNode node) { node.Current = false; node.Selected = false; } foreach (RadTreeNode node in tree.Nodes) { this.DetachAllNodes(node); } tree.Nodes.Clear();

Workaround:
Instead of {RadTreeNode}.Nodes.Clear(), use 

 while ({RadTreeNode}.Nodes.Count>0)
          {
              {RadTreeNode}.Nodes.RemoveAt(0);
          }

To reproduce:
-add RadTreeView and RadButton:
-use the following code:

public partial class Form1 : Form
{
    public Form1()
    {
        InitializeComponent();
        List<Distributor> distributors = new List<Distributor>()
        {
            new Distributor(432,"Distributor 1"),
            new Distributor(454,"Distributor 2"),
            new Distributor(438,"Distributor 3"),
            new Distributor(455,"Distributor 4")
        };

        List<Distributor> distributors2 = new List<Distributor>()
        {
            new Distributor(486,"Distributor 5"),
            new Distributor(487,"Distributor 6"),
            new Distributor(498,"Distributor 7"),
            new Distributor(475,"Distributor 8")
        };

        List<Product> products = new List<Product>();
        products.Add(new Product(567, "Bicycle", 5, distributors));
        products.Add(new Product(456, "Car", 5000,distributors2));
        products.Add(new Product(789, "Bike", 1500,null));

        BindingList<Category> categories = new BindingList<Category>();
        categories.Add(new Category("Bikes", products));
        categories.Add(new Category("Accessories", null));
        categories.Add(new Category("Clothing", null));

        radTreeView1.DataSource = categories;
        if ((radTreeView1.DataSource as BindingList<Category>).Count > 0)
        {
            radTreeView1.DisplayMember = "Name\\Description\\Name";
            radTreeView1.ChildMember = "Categories\\Products\\Distributors";   
        }
        
    }

    private void radButton1_Click(object sender, EventArgs e)
    {
        BindingList<Category> categories = radTreeView1.DataSource as BindingList<Category>;
        categories.Clear();
    }
}

public class Distributor
{
    private int _id;
    private string _name;

    public Distributor(int id, string name)
        {
            this._id = id;
            this._name = name;
        }

    public int Id
        {
            get
            {
                return this._id;
            }
            set
            {
                this._id = value;
            }
        }

    public string Name
        {
            get
            {
                return this._name;
            }
            set
            {
                this._name = value;
            }
        }
}

public class Product
{
    private int _id;
    private string _description;
    private float _price;
    private List<Distributor> _distributors;

    public List<Distributor> Distributors
        {
            get
            {
                return this._distributors;
            }
            set
            {
                this._distributors = value;
            }
        }

    public int ID
        {
            get
            {
                return _id;
            }
            set
            {
                _id = value;
            }
        }

    public string Description
        {
            get
            {
                return _description;
            }
            set
            {
                _description = value;
            }
        }

    public float Price
        {
            get
            {
                return _price;
            }
            set
            {
                _price = value;
            }
        }

    public Product(int id, string description, float price, List<Distributor> distributors)
    {
        _id = id;
        _description = description;
        _price = price;
        _distributors = distributors;
    }
}

public class Category
{
    public Category(string name, List<Product> products)
    {
        _name = name;
        _products = products;
    }

    private List<Product> _products;
    private string _name;

    public string Name
        {
            get
            {
                return _name;
            }
            set
            {
                _name = value;
            }
        }

    public List<Product> Products
        {
            get
            {
                return _products;
            }
            set
            {
                _products = value;
            }
        }
}

When you click the button, ArgumentOutOfRangeException is thrown.

Workaround: instead of clearing the BindingList, remove each list item one by one:
while (categories.Count>0)
{
    categories.RemoveAt(0);
}

FIX. RadTreeView - when adding row in the underlying source, the nodes in the tree are collapsed, even when using DeferRefresh