Tutorials > lablgtk2 tutorial > Widget overview > Type conversion

Type conversion

You’ll notice as you go on that you need a type conversion. What you will see are:

method as_widget : Gtk.widget Gtk.obj
method coerce : widget

These are all used to cast arguments in functions. You’ll see them in the examples, and can usually tell when to use them simply by looking at the function’s declaration.

For example:

box#pack button#corece;

This casts the button into a widget.