Module layout 

Geometry primitives for the cell grid.

Three Copy, zero-cost wrappers describe points and extents on the terminal grid:

• Position - an (x, y) point.
• Size - a width × height extent.
• Rect - an axis-aligned rectangle, (x, y, width, height).

Coordinate system

The origin is the top-left corner of the grid. x increases to the right and y increases downward, so (0, 0) is the first cell and a larger y is further down the screen. A Rect covers the half-open ranges x..x + width (columns) and y..y + height (rows):

      x:  0   1   2   3   4
        ┌───┬───┬───┬───┬───┐
  y: 0  │   │   │   │   │   │
        ├───┼───┼───┼───┼───┤
     1  │   │ ▓ │ ▓ │   │   │   Rect::new(1, 1, 2, 2)
        ├───┼───┼───┼───┼───┤   origin (1, 1), 2 × 2 cells,
     2  │   │ ▓ │ ▓ │   │   │   covering x ∈ 1..3, y ∈ 1..3
        ├───┼───┼───┼───┼───┤
     3  │   │   │   │   │   │
        └───┴───┴───┴───┴───┘

Tuple shorthand

Most positional APIs accept impl Into<Position>, impl Into<Size>, and impl Into<Rect>, so plain tuples work as ergonomic shorthand:

use uncurses::layout::{Position, Rect};

let p: Position = (3, 5).into();
assert_eq!(p, Position::new(3, 5));

let r: Rect = (3, 5, 10, 2).into();
assert_eq!(r, Rect::new(3, 5, 10, 2));

Structs

Position

A point in the cell grid (x column, y row).

Rect

An axis-aligned rectangle in the cell grid.

Size

A size in the cell grid (width columns by height rows).