Struct druid::Region

pub struct Region(_);

A region of a widget, generally used to describe what needs to be drawn.

This is currently just a single Rect, but may become more complicated in the future. Although this is just a wrapper around Rect, it has some different conventions. Mainly, "signed" invalidation regions don't make sense. Therefore, a rectangle with non-positive width or height is considered "empty", and all empty rectangles are treated the same.

Implementations

impl Region

pub const EMPTY: Region

An empty region.

pub fn to_rect(&self) -> Rect

Returns the smallest Rect that encloses the entire region.

pub fn intersects(&self, other: Rect) -> bool

Returns true if self intersects with other.

pub fn is_empty(&self) -> bool

Returns true if this region is empty.

Trait Implementations

impl AddAssign<Vec2> for Region

fn add_assign(&mut self, offset: Vec2)

Performs the += operation.

impl Clone for Region

fn clone(&self) -> Region

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for Region

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

Formats the value using the given formatter.

impl From<Rect> for Region

fn from(src: Rect) -> Region

Performs the conversion.

impl SubAssign<Vec2> for Region

fn sub_assign(&mut self, offset: Vec2)

Performs the -= operation.