Struct WaveformViewportController 

pub struct WaveformViewportController { /* private fields */ }

An observable, source-time Waveform Viewport and its navigation commands.

Create this Controller with use_waveform_viewport. Pan distances are expressed as fractions of the current visible span. Zoom factors greater than one zoom in, and the supplied source-time anchor remains at the same relative position whenever source boundaries permit it.

Implementations

impl WaveformViewportController

pub fn total_duration(self) -> Duration

The complete source duration.

pub fn visible_range(self) -> Range<Duration>

The current positive, half-open visible source-time interval.

pub fn is_following(self) -> bool

Whether Playback position updates currently move the Viewport.

pub fn follow_playback(self, position: Duration)

Keep Playback within the Viewport’s forward safe zone while following.

Positions inside the 15–75% safe zone do not move the Viewport. Once a position leaves it, the Viewport moves to place Playback at 25% unless a source boundary intervenes. Positions beyond the source are clamped.

pub fn resume_follow(self, position: Duration)

Resume following Playback and immediately reveal its current position.

pub fn pan(self, fraction: f64)

Move by a fraction of the current visible span.

pub fn show_range(self, range: Range<Duration>)

Present a requested source-time interval after clamping it to the source.

A collapsed or reversed request becomes the smallest representable positive interval at its requested start.

pub fn reset(self)

Restore the complete source duration.

pub fn zoom(self, factor: f64, anchor: Duration)

Zoom by factor around an explicit source-time anchor.

Invalid or non-positive factors leave the Viewport unchanged. Extreme factors clamp between one nanosecond and the complete source duration.

Trait Implementations

impl Clone for WaveformViewportController

fn clone(&self) -> WaveformViewportController

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for WaveformViewportController

impl PartialEq for WaveformViewportController

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

Equality operator ==.

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

Inequality operator !=.

impl StructuralPartialEq for WaveformViewportController