Struct cursive::event::Callback
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pub struct Callback(_);
Callback is a function that can be triggered by an event. It has a mutable access to the cursive root.
Methods
impl Callback
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fn from_fn<F: Fn(&mut Cursive) + 'static>(f: F) -> Self
Wraps the given function into a Callback
object.
Methods from Deref<Target=Box<Fn(&mut Cursive)>>
fn downcast<T>(self) -> Result<Box<T>, Box<Any + 'static>> where T: Any
1.0.0
Attempt to downcast the box to a concrete type.
Examples
use std::any::Any; fn print_if_string(value: Box<Any>) { if let Ok(string) = value.downcast::<String>() { println!("String ({}): {}", string.len(), string); } } fn main() { let my_string = "Hello World".to_string(); print_if_string(Box::new(my_string)); print_if_string(Box::new(0i8)); }Run
fn downcast<T>(self) -> Result<Box<T>, Box<Any + 'static + Send>> where T: Any
1.0.0
Attempt to downcast the box to a concrete type.
Examples
use std::any::Any; fn print_if_string(value: Box<Any + Send>) { if let Ok(string) = value.downcast::<String>() { println!("String ({}): {}", string.len(), string); } } fn main() { let my_string = "Hello World".to_string(); print_if_string(Box::new(my_string)); print_if_string(Box::new(0i8)); }Run
Trait Implementations
impl Clone for Callback
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fn clone(&self) -> Callback
Returns a copy of the value. Read more
fn clone_from(&mut self, source: &Self)
1.0.0
Performs copy-assignment from source
. Read more
impl Deref for Callback
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type Target = Box<Fn(&mut Cursive)>
The resulting type after dereferencing
fn deref<'a>(&'a self) -> &'a Box<Fn(&mut Cursive)>
The method called to dereference a value