// Copyright (c) 2013-2014 by SiegeLord
//
// All rights reserved. Distributed under LGPL 3.0. For full terms see the file LICENSE.
use std::fmt;
pub use self::Coordinate::*;
/// Specifies how to interpret the coordinate passed to a plotting command
#[derive(Copy)]
pub enum Coordinate
{
/// Coordinates are done relative to a graph (i.e. an axis set). (0, 0) is the bottom left corner and (1, 1) is the top right corner.
/// You'd use this to place labels and other objects so that they remain in the same place relative to the graph no matter what you have plotted.
Graph(f64),
/// Coordinates match those on the axes. You'd use this to place labels and other objects relative to regions of interest in the graph (e.g. labeling the peak of a function)
Axis(f64)
}
impl fmt::Display for Coordinate
{
fn fmt(&self, buf: &mut fmt::Formatter) -> fmt::Result
{
let (name, x) = match *self
{
Graph(x) => (" graph ", x),
Axis(x) => (" first ", x),
};
write!(buf, "{}{:.16e}", name, x)
}
}