private TreeNode createTreeNode(DBNode <T> node)
{
TreeNode treeNode;
if (treeNodeLookup.ContainsKey(node))
{
return(treeNodeLookup[node]);
}
else
{
treeNode = new TreeNode();
treeNode.Tag = node;
treeNodeLookup[node] = treeNode;
}
node.UpdateDynamicNode();
node.Children.Sort();
setVisualProperties(treeNode);
updateFilteredItems(treeNode, false);
// add any missing children
foreach (DBNode <T> currSubNode in node.Children)
{
TreeNode child = createTreeNode(currSubNode);
if (!treeNode.Nodes.Contains(child))
{
treeNode.Nodes.Add(child);
}
}
treeNode.Collapse();
node.Modified += new DBNodeEventHandler(nodeModified);
watchedNodes.Add(node);
return(treeNode);
}
private void updateFilteredItems(TreeNode treeNode, bool forcePopulation)
{
DBNode <T> node = treeNode.Tag as DBNode <T>;
// make sure we have an updatable node and we are not already processing
if (node == null)
{
return;
}
if (updatingNodes.Contains(node))
{
return;
}
updatingNodes.Add(node);
// if this is a dynamic node, update the children at model level
if (node.DynamicNode)
{
node.UpdateDynamicNode();
}
// if the node is not expanded and is a leaf node, don't worry about populating it for now
if (!forcePopulation && !treeNode.IsExpanded && node.Children.Count == 0 && node.Filter != null)
{
if (treeNode.Nodes.Count == 0)
{
treeNode.Nodes.Add(new TreeNode("dummy"));
}
updatingNodes.Remove(node);
return;
}
treeNode.Nodes.Clear();
// if this node has children, add, update those children, then exit
if (node.Children.Count > 0)
{
foreach (DBNode <T> currSubNode in node.Children)
{
if (treeNodeLookup.ContainsKey(currSubNode))
{
treeNode.Nodes.Add(treeNodeLookup[currSubNode]);
updateFilteredItems(treeNodeLookup[currSubNode], false);
}
}
updatingNodes.Remove(node);
return;
}
// if this is a dynamic node, add any missing children
if (node.DynamicNode)
{
foreach (DBNode <T> currSubNode in node.Children)
{
TreeNode child = createTreeNode(currSubNode);
if (!treeNode.Nodes.Contains(child))
{
treeNode.Nodes.Add(child);
}
}
updatingNodes.Remove(node);
return;
}
// add all leaf nodes
node.DBManager = DBManager;
if (node.Children.Count == 0)
{
foreach (T currItem in node.GetFilteredItems().OrderBy((item) => item.ToString()))
{
TreeNode itemNode = new TreeNode(currItem.ToString());
itemNode.Tag = currItem;
treeNode.Nodes.Add(itemNode);
setVisualProperties(itemNode);
}
updatingNodes.Remove(node);
return;
}
updatingNodes.Remove(node);
}
