Struct TimelineCtx

pub struct TimelineCtx<'a> {

    pub project: &'a mut Project,
    pub selection: &'a mut Vec<u64>,
    pub sel_transitions: &'a mut Vec<u64>,
    pub playhead: &'a mut f64,
    pub undo: &'a mut dyn FnMut(&Project),
    pub waveforms: &'a mut WaveformCache,
    pub palette: &'a Palette,
    pub snap: bool,
    pub playing: bool,
    pub thumbs: Option<&'a mut ThumbCache>,
    pub keep_ranges: &'a [(f64, f64)],
    pub prerender: &'a [(f64, f64, bool)],
    pub tool: Tool,
}

Fields

project: &'a mut Project

selection: &'a mut Vec<u64>

sel_transitions: &'a mut Vec<u64>

Selected transition ids (timeline bands) — separate from the clip selection: clicking one kind of thing deselects the other, Ctrl adds within its own kind.

playhead: &'a mut f64

undo: &'a mut dyn FnMut(&Project)

Call with the project before mutating it (once per gesture) — pushes an undo snapshot.

waveforms: &'a mut WaveformCache

palette: &'a Palette

snap: bool

playing: bool

thumbs: Option<&'a mut ThumbCache>

Thumbnail cache for video/image filmstrips. None = no filmstrips (e.g. headless tests).

keep_ranges: &'a [(f64, f64)]

Timeline ranges shaded in palette.selection at 15 % alpha (auto-cut “keep” preview). Empty = nothing.

prerender: &'a [(f64, f64, bool)]

Movie-mode pre-render coverage: merged (from, to, ready) runs, drawn as a bar along the top of the ruler. Empty = movie mode is off / nothing requested.

tool: Tool

Active tool strip tool. Cut splits a clicked clip, Marker drops a marker, Stretch retimes an edge drag instead of trimming it; everything else behaves as Select.