Presents a font chooser dialog to the user.
The font chooser dialog will be set up for selecting a font and specify features for the selected font.
Font features affect how the font is rendered, for example enabling glyph variants or ligatures.
| this |
a font dialog |
| parent |
the parent window |
| initial_value |
the font to select initially |
| cancellable |
a cancellable to cancel the operation |
| callback |
a callback to call when the operation is complete |
| user_data |
data to pass to |