/// <summary>
/// Expands or unexpands a specific node
/// </summary>
/// <param name="node"></param>
/// <param name="expand"></param>
public void ExpandNode(TaskTreeNode node, bool expand)
{
if (expand != node.isExpanded)
{
int index = stackPanel.Children.IndexOf(node);
if (expand)
{
node.isExpanded = true;
try
{
foreach (TaskTreeNode n in node.children)
{
stackPanel.Children.Insert(index + 1, n);
InitalizeExpandNode(n);
index += GetVisibleChildCount(n) + 1;
}
}
catch (Exception ex) { Console.WriteLine(ex); RefreshAll(); return; }
}
else
{
int children = GetVisibleChildCount(node);
try { stackPanel.Children.RemoveRange(index + 1, children); }
catch (Exception ex) { Console.WriteLine(ex); RefreshAll(); return; }
node.isExpanded = false;
}
node.ExpanderRefresh();
}
}
private void NodeAddToTree(TaskTreeNode node)
{
stackPanel.Children.Add(node);
nodeDictionary[node.ID] = node;
AddEvents(node);
foreach (TaskTreeNode n in node.children)
{
NodeAddToTree(n);
}
}
/// <summary>
/// Puts a certain node into focus
/// </summary>
/// <param name="node"></param>
public void Select(TaskTreeNode node)
{
foreach (TaskTreeNode n in selectedNodes)
{
n.Deselect();
}
selectedNodes.Clear();
selectedNodes.Add(node);
node.Select();
OnSelectionChanged();
}
public void AddNode(Task task, string parentID, bool expandParent)
{
TaskTreeNode parentNode = nodeDictionary[parentID];
TaskTreeNode node = new TaskTreeNode(task, parentNode.depth + 1);
if (expandParent)
{
ExpandNode(parentNode, true);
}
parentNode.children.Add(node);
parentNode.ExpanderRefresh();
NodeAddToTree(node, parentNode);
}
private void NodeAddToTree(TaskTreeNode node, TaskTreeNode parentNode)
{
if (stackPanel.Children.Contains(parentNode)) //Only add to panel if the parent is visible
{
int index = stackPanel.Children.IndexOf(parentNode) + GetVisibleChildCount(parentNode);
stackPanel.Children.Insert(index, node);
}
nodeDictionary[node.ID] = node;
AddEvents(node);
foreach (TaskTreeNode n in node.children)
{
NodeAddToTree(n, node);
}
}
private int GetVisibleChildCount(TaskTreeNode node)
{
int count = 0;
if (node.isExpanded)
{
count += node.children.Count;
foreach (TaskTreeNode n in node.children)
{
count += GetVisibleChildCount(n);
}
}
return(count);
}
/// <summary>
/// Creates the subnodes for a node assuming they were not there before
/// </summary>
/// <param name="node"></param>
private void InitalizeExpandNode(TaskTreeNode node)
{
if (node.isExpanded)
{
int index = stackPanel.Children.IndexOf(node);
foreach (TaskTreeNode n in node.children)
{
stackPanel.Children.Insert(index + 1, n);
InitalizeExpandNode(n);
index += GetVisibleChildCount(n) + 1;
}
}
node.ExpanderRefresh();
}
public void RemoveNode(List <TaskTreeNode> nodes, string nodeID)
{
for (int i = 0; i < nodes.Count; i++)
{
TaskTreeNode n = nodes[i];
if (n.ID == nodeID)
{
nodes.Remove(n);
i--;
}
else
{
RemoveNode(n.children, nodeID);
}
}
}
public void AddNode(Task task)
{
TaskTreeNode node = new TaskTreeNode(task, 0);
NodeAddToTree(node);
}
private void Node_ExpandUpdated(object sender, ExpandUpdatedEventArgs e)
{
TaskTreeNode node = (TaskTreeNode)sender;
ExpandNode(node, e.expanded);
}
private void AddEvents(TaskTreeNode node)
{
node.SelectionChanged += Node_SelectionChanged;
node.ExpandUpdated += Node_ExpandUpdated;
}