Struct OptionsUi 

pub struct OptionsUi {
    ctx: Context,
    state: State,
    renderer: Renderer,
    pub visible: bool,
    tab: Tab,
    boot: Settings,
    audio_devices: Vec<String>,
    audio_devices_fetched: bool,
}

Stateful egui overlay. Owns the renderer + the winit event translator; the visualiser keeps one of these for the life of the window.

Fields

ctx: Context

state: State

renderer: Renderer

visible: bool

Whether the panel is currently drawn. Toggle from main via Tab.

tab: Tab

boot: Settings

Snapshot of the settings the process booted with. Restart-only fields (MSAA, texture format) compare against this to decide whether the “Apply & restart” button should be enabled.

audio_devices: Vec<String>

Cached cpal input-device names, populated on demand by the “Refresh” button on the Audio tab. We don’t enumerate every frame — cpal device enumeration on ALSA is multi-millisecond.

audio_devices_fetched: bool

Whether the audio-device cache has been populated at least once. Drives a lazy first-fill on the user’s first visit to the Audio tab.

Implementations

impl OptionsUi

pub fn new( window: &Window, device: &Device, surface_format: TextureFormat, boot_settings: Settings, ) -> Self

pub fn on_event(&mut self, window: &Window, event: &WindowEvent) -> bool

Feed a winit event into egui. Returns true when egui consumed it (e.g. a click on a slider) — the caller should suppress its own handling so typing in egui doesn’t also flip presets.

pub fn toggle(&mut self)

pub fn render( &mut self, device: &Device, queue: &Queue, window: &Window, encoder: &mut CommandEncoder, surface_view: &TextureView, surface_size: (u32, u32), settings: &mut Settings, hud_data: &HudData, ) -> OptionsActions

Run one frame of the UI on top of surface_view. Returns the changes the user just made; the caller applies them to the live engine. The frame is a no-op when neither the options panel nor the HUD wants to draw anything.