// ...
private void ExpandNode(TreeDataNode node)
{
if (node == null || node.IsExpanded)
{
return;
}
Console.WriteLine("Expand Node: " + node.Data.NodeDisplay);
node.IsExpanded = true;
node.Nodes.Clear();
DataNode backNode = node.Data;
if (!backNode.IsExpanded)
{
backNode.Expand();
}
foreach (DataNode child in backNode.Nodes)
{
if (child != null)
{
node.Nodes.Add(new TreeDataNode(child));
}
}
}
public override void ItemDidExpand(NSNotification notification)
{
TreeDataNode node = notification.UserInfo ["NSObject"] as TreeDataNode;
if (node != null)
{
Console.WriteLine("Finished Expanding: " + node.Data.NodeDisplay);
}
}
public override void ItemWillExpand(NSNotification notification)
{
TreeDataNode node = notification.UserInfo ["NSObject"] as TreeDataNode;
if (node != null)
{
Console.WriteLine("Preparing to expand: " + node.Data.NodeDisplay);
_main.ExpandNode(node);
}
}
public override int GetChildrenCount(NSOutlineView outlineView, NSObject item)
{
if (item is TreeDataNode)
{
TreeDataNode nodeItem = item as TreeDataNode;
return(nodeItem.Nodes.Count);
}
return(_nodes.Count);
}
public override bool ItemExpandable(NSOutlineView outlineView, NSObject item)
{
TreeDataNode nodeItem = item as TreeDataNode;
if (nodeItem != null)
{
return(nodeItem.HasChildren);
}
return(false);
}
public override NSObject GetChild(NSOutlineView outlineView, int childIndex, NSObject ofItem)
{
TreeDataNode nodeItem = ofItem as TreeDataNode;
if (nodeItem != null)
{
return(nodeItem.Nodes [childIndex]);
}
return(Nodes[childIndex]);
}
public override NSObject GetObjectValue(NSOutlineView outlineView, NSTableColumn forTableColumn, NSObject byItem)
{
TreeDataNode nodeItem = byItem as TreeDataNode;
if (nodeItem == null)
{
return(null);
}
return((NSString)nodeItem.CombinedName);
}
public override void ItemWillCollapse(NSNotification notification)
{
TreeDataNode node = notification.UserInfo ["NSObject"] as TreeDataNode;
if (node != null)
{
if (node.Data.NodeDisplay == "saves") // The root node
{
Console.WriteLine("Uh-oh...");
}
Console.WriteLine("Preparing to collapse: " + node.Data.NodeDisplay);
}
}
// ...
private void ExpandNode (TreeDataNode node)
{
if (node == null || node.IsExpanded)
return;
Console.WriteLine ("Expand Node: " + node.Data.NodeDisplay);
node.IsExpanded = true;
node.Nodes.Clear ();
DataNode backNode = node.Data;
if (!backNode.IsExpanded) {
backNode.Expand ();
}
foreach (DataNode child in backNode.Nodes) {
if (child != null) {
node.Nodes.Add (new TreeDataNode (child));
}
}
}