Gtk.TreeView::test-expand-row
function callback(tree_view, iter:Gtk.TreeIter, path:Gtk.TreePath, ):Boolean;
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.
- tree_view
instance of Gtk.TreeView that is emitting the signal
- 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