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use Cursive;
use event::{Callback, Event, EventResult};
use std::collections::HashMap;
use view::{View, ViewWrapper};
use With;
pub struct OnEventView<T: View> {
content: T,
callbacks: HashMap<Event, Callback>,
}
impl<T: View> OnEventView<T> {
pub fn new(view: T) -> Self {
OnEventView {
content: view,
callbacks: HashMap::new(),
}
}
pub fn on_event<F, E: Into<Event>>(self, event: E, cb: F) -> Self
where F: Fn(&mut Cursive) + 'static
{
self.with(|s| s.set_on_event(event, cb))
}
pub fn set_on_event<F, E: Into<Event>>(&mut self, event: E, cb: F)
where F: Fn(&mut Cursive) + 'static
{
self.callbacks.insert(event.into(), Callback::from_fn(cb));
}
}
impl<T: View> ViewWrapper for OnEventView<T> {
wrap_impl!(self.content: T);
fn wrap_on_event(&mut self, event: Event) -> EventResult {
match self.content.on_event(event.clone()) {
EventResult::Ignored => {
match self.callbacks.get(&event) {
None => EventResult::Ignored,
Some(cb) => EventResult::Consumed(Some(cb.clone())),
}
}
res => res,
}
}
}