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#![deny(missing_docs)]
#![deny(missing_copy_implementations)]
extern crate input;
use input::{
GenericEvent,
MouseButton,
};
use input::Button::Mouse;
#[derive(Copy, Clone)]
pub enum Drag {
Interrupt,
Start(f64, f64),
Move(f64, f64),
End(f64, f64),
}
#[derive(Copy, Clone)]
pub struct DragController {
pub drag: bool,
pub pos: [f64; 2],
}
impl DragController {
pub fn new() -> DragController {
DragController {
drag: false,
pos: [0.0, 0.0],
}
}
pub fn event<E: GenericEvent, F>(&mut self, e: &E, mut f: F)
where
F: FnMut(Drag) -> bool
{
e.mouse_cursor(|x, y| {
self.pos = [x, y];
if self.drag {
self.drag = f(Drag::Move(x, y));
}
});
e.press(|button| {
match button {
Mouse(MouseButton::Left) => {
if !self.drag {
self.drag = f(Drag::Start(self.pos[0], self.pos[1]));
}
}
_ => {}
}
});
if !self.drag { return; }
e.release(|button| {
match button {
Mouse(MouseButton::Left) => {
if self.drag {
f(Drag::End(self.pos[0], self.pos[1]));
}
self.drag = false;
}
_ => {}
}
});
e.focus(|focused| {
if focused == false {
self.drag = f(Drag::Interrupt);
}
});
}
}