Last time I tried, Delphi had no concept of "outlet", every widget is accessible by the form class that contains it. On the Anjuta+Glade integration, you double click the widget on the inspector to add it to "private" struct, so you can access it on the callbacks.

I know that because I implemented it: https://gitlab.gnome.org/GNOME/anjuta/-/commit/5abe8fd3a97d8...