private void node_CheckStateChanged(object sender, EventArgs e)
{
Node node = (Node)sender;
// for leaf nodes, update the underlying item
AuthorityTokenTableEntry token = (AuthorityTokenTableEntry)node.Tag;
bool nodeChecked = node.CheckState == CheckState.Checked;
if (token != null && token.Selected != nodeChecked)
{
token.Selected = nodeChecked;
}
// check if this event should be ignored because it was not generated by a user action
if (IgnoreCheckStateEventsScope.Ignore)
{
return;
}
if (node.CheckState == CheckState.Mixed)
{
// don't allow the user to set the state to mixed - force it to unchecked
node.CheckState = CheckState.Unchecked;
}
else
{
// otherwise, update child and parent nodes appropriately
using (new IgnoreCheckStateEventsScope())
{
PropagateCheckStateDown(node);
if (node.Parent != null)
{
PropagateCheckStateUp(node.Parent);
}
}
}
}
private void InsertToken(NodeCollection nodeCollection, AuthorityTokenTableEntry token, int depth)
{
// check if a node for this path segment already exists in the tree
PathSegment segment = token.Path.Segments[depth];
Node node = CollectionUtils.SelectFirst <Node>(nodeCollection,
delegate(Node n)
{
return(n.Text == segment.LocalizedText);
});
// if not, create the node
if (node == null)
{
node = new Node(segment.LocalizedText);
node.CheckStateChanged += new EventHandler(node_CheckStateChanged);
nodeCollection.Add(node);
}
// if this is a leaf node, set the properties of the tree node accordingly
if (segment == token.Path.LastSegment)
{
node.Tag = token;
node.Tooltip = token.Description;
node.CheckState = token.Selected ? CheckState.Checked : CheckState.Unchecked;
// addition of this leaf may need to alter the check state of the parent
if (node.Parent != null)
{
PropagateCheckStateUp(node.Parent);
}
}
else
{
// otherwise, recur until we hit the leaf
InsertToken(node.Nodes, token, depth + 1);
}
}
private void InsertToken(NodeCollection nodeCollection, AuthorityTokenTableEntry token, int depth)
{
// check if a node for this path segment already exists in the tree
PathSegment segment = token.Path.Segments[depth];
Node node = CollectionUtils.SelectFirst<Node>(nodeCollection,
delegate(Node n)
{
return n.Text == segment.LocalizedText;
});
// if not, create the node
if(node == null)
{
node = new Node(segment.LocalizedText);
node.CheckStateChanged += new EventHandler(node_CheckStateChanged);
nodeCollection.Add(node);
}
// if this is a leaf node, set the properties of the tree node accordingly
if (segment == token.Path.LastSegment)
{
node.Tag = token;
node.Tooltip = token.Description;
node.CheckState = token.Selected ? CheckState.Checked : CheckState.Unchecked;
// addition of this leaf may need to alter the check state of the parent
if (node.Parent != null)
{
PropagateCheckStateUp(node.Parent);
}
}
else
{
// otherwise, recur until we hit the leaf
InsertToken(node.Nodes, token, depth + 1);
}
}
