[−][src]Type Definition azul_core::callbacks::UpdateScreen
type UpdateScreen = Option<()>;
A callback function has to return if the screen should be updated after the function has run.
NOTE: This is currently a typedef for Option<()>
, so that you can use
the ?
operator in callbacks (to simply not redraw if there is an error).
This was an enum previously, but since Rust doesn't have a "custom try" operator,
this led to a lot of usability problems. In the future, this might change back
to an enum therefore the constants "Redraw" and "DontRedraw" are not capitalized,
to minimize breakage.