protected virtual void UpdateLines()
{
TreeNodeElement nodeElement = NodeElement;
bool showLines = nodeElement.TreeViewElement.ShowLines;
if (!showLines)
{
foreach (TreeNodeLineElement element in this.Children)
{
element.Visibility = ElementVisibility.Hidden;
}
}
// bool collapseLastlevel = nodeElement.TreeViewElement.LazyMode ;
if (this.Children.Count > 0 && !nodeElement.TreeViewElement.ShowExpandCollapse)
{
this.Children[this.Children.Count - 1].Visibility = ElementVisibility.Collapsed;
}
if (!showLines)
{
return;
}
int index = this.Children.Count - 1;
RadTreeNode node = nodeElement.Data;
if (node.Nodes.Count > 0)
{
node = node.Parent;
}
while (node != null && index >= 0)
{
RadTreeNode nextNode = node.NextNode;
TreeNodeLineElement lineElement = (TreeNodeLineElement)this.Children[index];
UpdateLine(lineElement, node, nextNode, nodeElement);
node = node.Parent;
index--;
}
}
protected virtual void UpdateLine(TreeNodeLineElement lineElement, RadTreeNode node, RadTreeNode nextNode, TreeNodeElement lastNode)
{
if (this.Children[0] == lineElement && !lastNode.TreeViewElement.ShowRootLines)
{
lineElement.Visibility = ElementVisibility.Collapsed;
return;
}
lineElement.Visibility = ElementVisibility.Visible;
lineElement.ForeColor = lastNode.TreeViewElement.LineColor;
lineElement.LineStyle = (DashStyle)lastNode.TreeViewElement.LineStyle;
if (node == lastNode.Data)
{
if (node.Nodes.Count > 0)
{
if (!lastNode.TreeViewElement.ShowExpandCollapse)
{
if (nextNode == null)
{
lineElement.Type = TreeNodeLineElement.LinkType.RightBottomAngleShape;
}
else
{
lineElement.Type = TreeNodeLineElement.LinkType.TShape;
}
}
else
{
if (node.Parent != null && node.Parent.NextNode == null)
{
lineElement.Visibility = ElementVisibility.Hidden;
}
else
{
lineElement.Type = TreeNodeLineElement.LinkType.VerticalLine;
}
}
}
else if (nextNode == null)
{
lineElement.Type = TreeNodeLineElement.LinkType.RightBottomAngleShape;
}
else
{
if (node.Parent == null && node.PrevVisibleNode == null)
{
lineElement.Type = TreeNodeLineElement.LinkType.RightTopAngleShape;
}
else
{
lineElement.Type = (node.TreeViewElement.FullLazyMode) ? TreeNodeLineElement.LinkType.VerticalLine : TreeNodeLineElement.LinkType.TShape;
}
}
}
else
{
if (nextNode == null)
{
lineElement.Visibility = ElementVisibility.Hidden;
}
else if (node.Parent != null && node.Parent.NextNode == null && lineElement == this.Children[0])
{
lineElement.Visibility = ElementVisibility.Hidden;
}
else
{
lineElement.Type = TreeNodeLineElement.LinkType.VerticalLine;
}
}
}