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dhtmlxtree - updating opened item

Hello,

I'm updating (add, update and delete) my tree data with a frameset consisting of data input and tree frames.

When a sub-item is added, updated or deleted from an item that was already loaded and opened, the following code snippet is used to update the item in order to display the current sub-items state.

tree.updateItem(id, "newLabel", tree.getItemImage(id,0), tree.getItemImage(id,1), tree.getItemImage(id,2));
tree.refreshItem(id);

The problem is, this method causes refresh of all sub-items every time an update occurs. This is not particularly efficient especially where there are large number of sub-items involve.

My question is, what can be done to have refreshed only the sub-item affected by update.

Thanks for your support!