pub trait ToplevelExtManual: Sealed + IsA<Toplevel> {
// Provided method
fn connect_compute_size<F: Fn(&Toplevel, &mut ToplevelSize) + 'static>(
&self,
f: F,
) -> SignalHandlerId { ... }
}Expand description
Trait containing manually implemented methods of
Toplevel.
Provided Methods§
Sourcefn connect_compute_size<F: Fn(&Toplevel, &mut ToplevelSize) + 'static>(
&self,
f: F,
) -> SignalHandlerId
fn connect_compute_size<F: Fn(&Toplevel, &mut ToplevelSize) + 'static>( &self, f: F, ) -> SignalHandlerId
Emitted when the size for the surface needs to be computed, when it is present.
This signal will normally be emitted during or after a call to
ToplevelExt::present(), depending on the configuration
received by the windowing system. It may also be emitted at any
other point in time, in response to the windowing system
spontaneously changing the configuration of the toplevel surface.
It is the responsibility of the toplevel user to handle this signal
and compute the desired size of the toplevel, given the information
passed via the ToplevelSize object. Failing to do so
will result in an arbitrary size being used as a result.
§size
Dyn Compatibility§
This trait is not dyn compatible.
In older versions of Rust, dyn compatibility was called "object safety", so this trait is not object safe.