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TimelineViewport

app_ui::timeline_view

Struct TimelineViewport 

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pub struct TimelineViewport {
    px_per_frame: f64,
    scroll_frame: f64,
    width_px: f64,
    fps: u32,
    duration_frames: u64,
}
Expand description

Maps between project frames and timeline pixels at a zoom + scroll.

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§px_per_frame: f64§scroll_frame: f64§width_px: f64§fps: u32§duration_frames: u64

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impl TimelineViewport

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pub fn fit(duration_frames: u64, fps: u32, width_px: f64) -> Self

A viewport zoomed so the whole clip fits in width_px.

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pub fn px_per_frame(&self) -> f64

Pixels per frame (the zoom level).

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pub fn scroll_frame(&self) -> f64

Leftmost visible frame.

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pub fn frame_to_px(&self, frame: f64) -> f64

Pixel x of a frame within the viewport.

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pub fn px_to_frame(&self, px: f64) -> f64

Frame at a pixel x within the viewport.

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pub fn frame_to_fraction(&self, frame: f64) -> f64

Fraction 0..=1 of the viewport width for frame (for percent-based CSS positioning of a responsive, fit-to-width ruler).

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pub fn visible_range(&self) -> (f64, f64)

Visible frame range (first, last).

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pub fn zoom_at(&mut self, factor: f64, anchor_px: f64)

Zoom by factor (>1 = in) keeping the frame under anchor_px fixed — so zooming centred on the playhead keeps the playhead put.

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pub fn pan_px(&mut self, dx: f64)

Pan by dx pixels (positive dx scrolls the content left).

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fn clamp_scroll(&mut self)

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pub fn ruler_ticks(&self) -> Vec<RulerTick>

Labeled ruler ticks across the visible range, at a “nice” second interval chosen so labels stay at least MIN_TICK_SPACING_PX apart. Frame-correct at every zoom level.

Trait Implementations§

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impl Clone for TimelineViewport

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fn clone(&self) -> TimelineViewport

Returns a duplicate of the value. Read more
1.0.0 (const: unstable) · Source§

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

Performs copy-assignment from source. Read more
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impl Debug for TimelineViewport

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

Formats the value using the given formatter. Read more
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impl PartialEq for TimelineViewport

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

Tests for self and other values to be equal, and is used by ==.
1.0.0 (const: unstable) · Source§

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

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.
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impl Copy for TimelineViewport

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impl StructuralPartialEq for TimelineViewport

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