Struct Appearing 

pub struct Appearing { /* private fields */ }

The coming and going of one surface on the standard Appear motion.

The owner keeps its own open state, which input acts on at once; this only says how the surface is drawn. Self::follow (once a frame, from the draw, and wherever the owner opens or closes it) picks up a change and starts the motion from where it is drawn: a reopen mid-exit reverses, repeated toggles never queue. What asked for the change is the input the toolkit handled last (super::input_source): a key lands it at once, a click moves it. A closing surface keeps being drawn until it has gone, but takes no input (a click goes to whatever is under it).

Every motion it starts asks the frame pump for frames until it settles (super::want_frames_until), so a menu an owner draws outside the polled tree still moves, and nothing asks once it rests.

Implementations

impl Appearing

pub fn closed() -> Appearing

Not shown, at rest.

pub fn opened() -> Appearing

Shown, at rest: a surface that is open from its first paint (first paint shows the resting state; motion explains changes).

pub fn follow(&mut self, open: bool, motion: EffectiveMotion)

Follow the owner’s open state with the motion the person allows (theme.motion()), as the last input asked for it.

pub fn show(&mut self, open: bool)

Open or close it with the motion it last drew with, as the last input asked for it: what an owner’s open and close call, so a surface whose owner stops drawing it once closed still arrives the next time.

pub fn show_from(&mut self, open: bool, source: MotionSource)

Self::show for a change source asked for: a host that opens and closes a surface of its own says what asked, since no input of the app did.

pub fn follow_from( &mut self, open: bool, motion: EffectiveMotion, source: MotionSource, )

Self::follow for a change source asked for (a hover dwell is the pointer’s, whatever was pressed last).

pub fn snap(&mut self, open: bool)

Jump to open, at rest (a surface whose owner was rebuilt open).

pub fn is_open(&self) -> bool

The state it is going to.

pub fn is_drawn(&self) -> bool

Whether anything of it is drawn now: open, opening or still leaving.

pub fn is_moving(&self) -> bool

Whether it is still moving now (its owner asks for frames).

pub fn progress(&self) -> f64

How open it is drawn now, 0..=1.

pub fn pose(&self, surface: Rect, anchor: Point) -> Pose

The pose of surface now, coming from anchor: the summoning control’s centre, the caret, the pointer of a context menu, or the surface’s own centre for a centred dialog. It comes from — or goes back to — the point of the surface nearest the anchor, at 92 % and 8 px toward it arriving, 97 % and 8 px leaving (Appearing says which of the two it is doing).

Trait Implementations

impl Clone for Appearing

fn clone(&self) -> Appearing

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for Appearing

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

Formats the value using the given formatter.

impl Default for Appearing

fn default() -> Appearing

Returns the “default value” for a type.

impl Copy for Appearing