Struct WindowZoom 

pub struct WindowZoom { /* private fields */ }

A window’s content zoom: its factor, where it is remembered, the level the window’s bar says after a change, and the scroll and pinch it accumulates into steps.

Implementations

impl WindowZoom

pub fn factor(&self) -> f32

The factor the window’s content is scaled by (1.0: default).

pub fn restore_for_app(&mut self, app_id: &str) -> bool

Remember the factor in app_id’s settings on this device, and take up the one stored there. Returns whether the factor changed.

pub fn in_window(&self) -> bool

Whether a window a person sees has this zoom: one was opened for an app (Self::restore_for_app). A test’s or a host worker’s app has no window to zoom.

pub fn step(&mut self, step: ZoomStep, now: Instant) -> bool

Take step on the window’s own scale: remember it and show the indicator. Returns whether the factor changed.

pub fn indicate(&mut self, factor: f32, _now: Instant)

Say the level factor in the window’s bar (a widget’s own zoom says its level the same way); the same level again (a step at a bound) says it once more.

pub fn indicator_visible(&self, _now: Instant) -> bool

Whether the window’s bar says the level.

pub fn publish(&mut self)

Keep the window’s bar saying the level while it lasts, and let it go once its time is up; the host calls this on its frames and at Self::deadline.

pub fn deadline(&self) -> Option<Instant>

When the level leaves the window’s bar, for the host’s wake.

pub fn step_of(&mut self, gesture: ZoomGesture) -> Option<ZoomStep>

The step gesture amounts to, if any yet.

pub fn scroll_step(&mut self, delta: &MouseScrollDelta) -> Option<ZoomStep>

A Ctrl+scroll: the step it adds up to, if any. A wheel notch is a step; a touchpad’s pixels add up to one.

pub fn pinch_step(&mut self, delta: f64, phase: TouchPhase) -> Option<ZoomStep>

A touchpad pinch’s change of scale: the step it adds up to, if any.

Trait Implementations

impl Debug for WindowZoom

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

Formats the value using the given formatter.

impl Default for WindowZoom

fn default() -> WindowZoom

Returns the “default value” for a type.