piston::event

Trait piston::event::UpdateEvent [−] [src]

pub trait UpdateEvent {
    fn from_update_args(args: &UpdateArgs, old_event: &Self) -> Option<Self>;
    fn update<U, F>(&self, f: F) -> Option<U> where F: FnMut(&UpdateArgs) -> U;

    fn from_dt(dt: f64, old_event: &Self) -> Option<Self> { ... }
    fn update_args(&self) -> Option<UpdateArgs> { ... }
}

When the application state should be updated

Required Methods

fn from_update_args(args: &UpdateArgs, old_event: &Self) -> Option<Self>

Creates an update event.

fn update<U, F>(&self, f: F) -> Option<U> where F: FnMut(&UpdateArgs) -> U

Calls closure if this is an update event.

Provided Methods

fn from_dt(dt: f64, old_event: &Self) -> Option<Self>

Creates an update event with delta time.

fn update_args(&self) -> Option<UpdateArgs>

Returns update arguments.

Implementors