traiting.rs

pub trait ApplicationDelegate {
    fn application_did_quit(&mut self, _timestamp: u32) {}
}

pub trait MouseDelegate {
	fn mouse_did_move(&mut self, _info: &MouseMotionEventInfo)  {}
	fn mouse_did_click(&mut self, _info: &MouseButtonEventInfo) {}
	fn mouse_did_scroll(&mut self, _info: &MouseWheelEventInfo) {}
}

pub struct NullDelegate;

impl ApplicationDelegate for NullDelegate {}
impl MouseDelegate for NullDelegate {}

impl NullDelegate {
	pub fn as_app(&mut self) -> &mut ApplicationDelegate {
		// ERROR: Failed to find an implementation of trait ApplicationDelegate...
		// Removing mut doesn't fix it either.
		&mut self as &mut ApplicationDelegate
	}
}