nomad-software
commented
8 years ago The treeview widget was rushed so only the bare minimum of functionality exists. With that said it should be possible to do what you want by thinking a little differently.
The widget should be seen as a view for your data and not a storage facility for it. In other words maintain a list of rows in your application and add and remove from that list, then when presenting the data to the user, clear and re-add the rows to the widget. I agree this won't scale if you are using thousands of rows but until a new API for this widget is in place that is the solution.
TheGag96
It doesn't appear that there is any way to delete individual rows from a TreeView barring deleting them all with deleteRows(). Calling destroy() on TreeViewRow does nothing. I thought then maybe I could do it the incredibly inefficient way and get all rows, delete them all from the tree, build a new list of rows (checking manually as to not add ones I want to remove), then adding that new list back. The thing is, I can't even do that because there's no way to get the list of all rows! Is the functionality really that incomplete, or am I missing something here?