connectTestExpandRow
fun connectTestExpandRow(connectFlags: <Error class: unknown class> = ConnectFlags(0u), handler: (iter: TreeIter, path: TreePath) -> Boolean): <Error class: unknown class>
The given row is about to be expanded (show its children nodes). Use this signal if you need to control the expandability of individual rows.
Parameters
connectFlags
A combination of ConnectFlags
handler
the Callback to connect. Params: iter the tree iter of the row to expand; path a tree path that points to the row. Returns false to allow expansion, true to reject