Hello I've been trying to create an IUP language binding for the Crystal language[1]. What I've got so far works fine, however, I haven't been able to bind `IupSetCallback` or `IupSetCallbacks` in an idiomatic way.
I created a post on the Crystal forums about this[2], the summary is that: to have this work in a "nice" way, either the original C function needs to have a `void* data`-type argument that can be used[3], or I create a singleton class which stores all the (Crystal) callbacks and looks up the appropriate one when writing the (C) callback. While the first option doesn't seem possible (considering it'd probably be a breaking change with no benefit), is there some way in IUP that I can use to be notified when the set callback isn't needed anymore as the control/dialog isn't either? Thanks, Ben [1]: https://crystal-lang.org [2]: https://forum.crystal-lang.org/t/c-binding-non-void-callback/2079 [3]: similar to `gpointer data` for `g_signal_connect_data()` in Gtk https://developer.gnome.org/gobject/stable/gobject-Signals.html#g-signal-connect-data _______________________________________________ Iup-users mailing list Iup-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/iup-users
