Dynamically populate TreeView children on first expand

[matwachich]

Hi!

I have a specific need: my app will have to display many (MANY) data on a tree view. So I want to dynamically populate it on expand.

I first populate root elements, that I want that on double clique (expand), while responding to TVN_EXPANDING, this item will have it's children.

The problem is that when an item has no children, impossible to expand it! The [+] button doesn't appear.

What's the best solution to this? I think I will test to add to each item a dummy child that will be deleted in TVN_EXPANDING.

[Nine]

You should know by now that providing a basic example (runable snippet of code) of the issue you are facing will greatly help us to help you.

[matwachich]

Problem soved (I think)

It's working just fine as I said: adding a dummy child element (with "..." text) that is deleted in $TVN_EXPANDING and then replaced by the content loaded from database.