private void DisposeDataNodes()
{
lock ( _dataNodes )
{
foreach (IntHashTable.Entry e in _dataNodes)
{
ResourceTreeDataNode node = (ResourceTreeDataNode)e.Value;
node.Dispose();
}
_dataNodes.Clear();
}
}
private void RemoveNode(JetListViewNode parentNode, IResource resource)
{
if (parentNode.Nodes.Contains(resource))
{
parentNode.Nodes.Remove(resource);
}
if (!_listView.NodeCollection.Contains(resource))
{
ResourceTreeDataNode dataNode = (ResourceTreeDataNode)_dataNodes [resource.Id];
if (dataNode != null)
{
dataNode.Dispose();
lock ( _dataNodes )
{
_dataNodes.Remove(resource.Id);
}
}
}
}
/// <summary>
/// For an existing tree node (incl. the originaly-present root), sets up the sorting for that node,
/// and expands it by adding all the "child" resources as child nodes.
/// </summary>
private void ExpandResource(JetListViewNode parentNode, IResource parentResource)
{
//////////////////
// Apply sorting
UserOrderSortSettings settings = null;
// Get the per-property sort settings as a string (written to each node)
string nodeSort = Core.ResourceTreeManager.GetResourceNodeSort(parentResource);
if (nodeSort != null) // Apply, if available
{
settings = UserOrderSortSettings.Parse(Core.ResourceStore, nodeSort);
}
else
{
settings = new UserOrderSortSettings();
}
// Apply the user-order sorting (it's writter as a property on the parent with an ordered list of child resources)
settings.SetUserOrder(parentResource);
// Submit the sorting order to the node
_listView.NodeCollection.SetItemComparer(
parentNode.Data
, new ResourceComparer(null, new UserOrderResourceComparer(settings), true));
/////////////////
// Get Children
ResourceTreeDataNode dataNode;
lock ( _dataNodes )
{
dataNode = (ResourceTreeDataNode)_dataNodes [parentResource.Id];
if (dataNode == null)
{
IResourceList childResources = null;
int parentProp = _parentProp;
if (_resourceChildProvider != null)
{
childResources = _resourceChildProvider.GetChildResources(parentResource);
}
if (childResources == null)
{
childResources = parentResource.GetLinksToLive(null, _parentProp);
}
else
{
parentProp = 0;
}
dataNode = new ResourceTreeDataNode(this, _listView, parentResource, parentProp, childResources);
_dataNodes [parentResource.Id] = dataNode;
}
}
////////////////////
// Submit Children
lock (dataNode.ChildResources)
{
// Add 'em!
foreach (IResource res in dataNode.ChildResources.ValidResources)
{
AddNode(parentNode, res); // This also calls an ExpandResource for that node
}
// Listen for changes to the children resources of the node (not to the node resource itself)
dataNode.AttachHandlers();
}
}
