Struct PreviewCtx

pub struct PreviewCtx<'a> {

    pub project: &'a mut Project,
    pub selection: &'a [u64],
    pub playhead: f64,
    pub playing: bool,
    pub fullscreen: bool,
    pub palette: &'a Palette,
    pub undo: &'a mut dyn FnMut(&Project),
    pub frame: Option<Arc<Frame>>,
    pub gpu_texture: Option<(TextureId, [u32; 2])>,
    pub tool: Tool,
    pub quality: u32,
    pub movie_mode: bool,
    pub prerender: Option<f32>,
    pub buffering: bool,
    pub proxy: Option<f32>,
    pub tracker: Option<(f32, f32, f32, f32)>,
}

Fields

project: &'a mut Project

selection: &'a [u64]

playhead: f64

playing: bool

fullscreen: bool

Video only: no transport bar, no selection overlay / drag.

palette: &'a Palette

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

frame: Option<Arc<Frame>>

A newly rendered frame to upload this update (None = keep the current texture).

gpu_texture: Option<(TextureId, [u32; 2])>

A texture the GPU renderer already holds, with its pixel size — painted directly, with no readback and no upload. Takes precedence over frame.

tool: Tool

Active editing tool (Tool::Select = drag moves the selected clip).

quality: u32

Current preview render scale in percent (settings.preview_quality).

movie_mode: bool

Current movie mode (settings.movie_mode).

prerender: Option<f32>

Pre-render progress 0..1 while frames are being cached (None = not pre-rendering).

buffering: bool

Playback is held while the player refills its read-ahead: draw a spinner over the video.

proxy: Option<f32>

Progress 0..1 of the proxy build in flight (None = no proxy being built).

tracker: Option<(f32, f32, f32, f32)>

Tracker box of the Tracking pane (centre + half sizes, project px relative to the canvas centre) while that pane is on screen — drawn here and dragged to place the template.