Enum Rotation 

pub enum Rotation {
    None,
    Cw90,
    Cw180,
    Cw270,
}

How far the UI is turned clockwise on its way to the window.

A quarter turn trades the screen’s width and height, so egui lays out for a portrait screen on a landscape panel (and the other way round). Pointer and touch positions travel back the same way, so a tap lands where it looks.

Variants

None

Cw90

A quarter turn clockwise: the screen’s top edge runs down the window’s right side.

Cw180

Upside down, for a panel mounted that way.

Cw270

A quarter turn anticlockwise: the screen’s top edge runs up the window’s left side.

Implementations

impl Rotation

pub const ALL: [Rotation; 4]

In turn order, for a setting that cycles them.

pub fn quarter_turns(self) -> u8

Quarter turns clockwise, 0 to 3.

pub fn from_quarter_turns(turns: i32) -> Self

Wrapping, and negative turns count anticlockwise, so callers may add turns without normalising first.

pub fn degrees(self) -> f64

Clockwise degrees, as SDL_RenderCopyEx takes them.

pub fn swaps_axes(self) -> bool

Whether width and height trade places.

pub fn screen_size(self, window: Vec2) -> Vec2

The screen egui lays out for, inside a window of window.

pub fn to_window(self, p: Pos2, window: Vec2) -> Pos2

Where a point of the turned screen lands in the window. window is the window’s size in the same unit as p — points for geometry egui laid out, pixels for a frame being presented.

pub fn from_window(self, p: Pos2, window: Vec2) -> Pos2

Where a point of the window falls in the turned screen — the way pointer input travels.

pub fn rect_to_window(self, rect: Rect, window: Vec2) -> Rect

A quarter turn maps an axis-aligned rect onto another one, so a clip rect survives the trip.

pub fn turn_primitives(self, jobs: &mut [ClippedPrimitive], window: Vec2)

Turn a tessellated frame into window space, for backends that put their geometry on screen as it comes. window is the window’s size in points.

Paint callbacks are moved but not turned: what they draw is the app’s own, out of reach here.

Trait Implementations

impl Clone for Rotation

fn clone(&self) -> Rotation

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for Rotation

impl Debug for Rotation

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

Formats the value using the given formatter.

impl Default for Rotation

fn default() -> Rotation

Returns the “default value” for a type.

impl Eq for Rotation

impl Hash for Rotation

fn hash<__H: Hasher>(&self, state: &mut __H)

Feeds this value into the given Hasher.

fn hash_slice<H>(data: &[Self], state: &mut H)

where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl PartialEq for Rotation

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

Equality operator ==.

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

Inequality operator !=.

impl StructuralPartialEq for Rotation