Struct Window 

pub struct Window {
    pub origin: Pos,
    pub size: Size,
}

A rectangle in the plane: where it starts and how large it is.

An origin and a Size, and not a Footprint, because the two answer different questions: a window is chosen before anything is drawn and may hold no position at all, while a footprint exists only once a stamp has reached somewhere. A Buffer is given one of these, and render is asked for one, so the same rectangle travels through both without being taken apart into two arguments.

Fields

origin: Pos

The top-left corner, in the plane.

size: Size

How far the window reaches from origin, right and down.

Implementations

impl Window

pub fn contains(self, at: Pos) -> bool

Whether at falls inside this window.

The right and bottom edges are outside: a window of width w holds columns origin.x to origin.x + w - 1, which is the rectangle a buffer stamps into.

pub fn position(self, at: Offset) -> Option<Pos>

The position at reaches, counted from this window’s top-left corner, or None when the origin and the offset cannot be added.

The offset is the one a caller already holds — a click arrives as a column and a row of what was rendered — so nothing is added before this translation, and the window’s origin takes no other part in the answer.

Trait Implementations

impl Clone for Window

fn clone(&self) -> Self

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Copy for Window

impl Debug for Window

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Eq for Window

impl PartialEq for Window

fn eq(&self, other: &Self) -> bool

Equality operator ==.

fn ne(&self, other: &Rhs) -> bool

Inequality operator !=.

impl StructuralPartialEq for Window