Enum Command 

pub enum Command {
    NextSlide,
    PreviousSlide,
    NextOverlay,
    PreviousOverlay,
    FirstSlide,
    LastSlide,
    GoToSlide(usize),
    ToggleFreeze,
    ToggleBlackout,
    ToggleWhiteboard,
    ToggleScreenShareMode,
    TogglePresentationMode,
    ToggleLaser,
    CycleLaserStyle,
    SetPointerPosition(f32, f32),
    ToggleInk,
    AddInkPoint(f32, f32),
    FinishInkStroke,
    ClearInk,
    SetInkColor([u8; 4]),
    SetInkWidth(f32),
    CycleInkColor,
    CycleInkWidth,
    ToggleSpotlight,
    SetSpotlightPosition(f32, f32),
    ToggleZoom,
    SetZoomRegion {
        center: (f32, f32),
        factor: f32,
    },
    StartTimer,
    PauseTimer,
    ToggleTimer,
    ResetTimer,
    ToggleSlideOverview,
    ToggleNotesPanel,
    ToggleNotesEdit,
    SetCurrentSlideNotes(String),
    IncrementNotesFontSize,
    DecrementNotesFontSize,
    ToggleTextBoxMode,
    PlaceTextBox {
        x: f32,
        y: f32,
        w: f32,
        h: f32,
    },
    EditTextBoxContent {
        id: u64,
        content: String,
    },
    MoveTextBox {
        id: u64,
        x: f32,
        y: f32,
    },
    ResizeTextBox {
        id: u64,
        w: f32,
        h: f32,
    },
    DeleteTextBox {
        id: u64,
    },
    SelectTextBox(u64),
    DeselectTextBox,
    BeginTextBoxEdit {
        id: u64,
    },
    SetTextBoxFontSize {
        id: u64,
        size: f32,
    },
    SetTextBoxColor {
        id: u64,
        color: [u8; 4],
    },
    SetTextBoxBackground {
        id: u64,
        color: Option<[u8; 4]>,
    },
    Quit,
    SaveSidecar,
}

Every user action in Dais is represented as a discrete typed command.

Commands are dispatched through the CommandBus and processed by the presentation engine. The UI never mutates state directly — all mutations flow through commands.

This design enables future external control surfaces (REST API, WebSocket, mobile remote) to be added as new command sources without modifying the engine.

Variants

NextSlide

Advance to the first page of the next logical slide group.

PreviousSlide

Go back to the first page of the previous logical slide group.

NextOverlay

Advance one PDF page (next overlay/build step within a group).

PreviousOverlay

Go back one PDF page (previous overlay/build step).

FirstSlide

Jump to the first slide.

LastSlide

Jump to the last slide.

GoToSlide(usize)

Jump to a specific logical slide by index (0-based).

ToggleFreeze

Freeze/unfreeze the audience display.

ToggleBlackout

Black out/restore the audience display.

ToggleWhiteboard

Toggle the whiteboard (blank white drawing canvas on audience).

ToggleScreenShareMode

Toggle screen-share mode (audience window as normal window).

TogglePresentationMode

Toggle presentation mode (single-monitor: console ↔ fullscreen HUD).

ToggleLaser

Toggle the laser pointer on/off.

CycleLaserStyle

Cycle the laser pointer visual style.

SetPointerPosition(f32, f32)

Update the pointer position (normalized 0..1 coordinates relative to slide).

ToggleInk

Toggle freehand ink drawing mode.

AddInkPoint(f32, f32)

Add a point to the current ink stroke (normalized coordinates).

FinishInkStroke

Finish the current ink stroke (pen lifted).

ClearInk

Clear all ink on the current page.

SetInkColor([u8; 4])

Set the active pen color (RGBA). Affects only future strokes.

SetInkWidth(f32)

Set the active pen width in logical pixels. Affects only future strokes.

CycleInkColor

Cycle the active pen color through the built-in preset list.

CycleInkWidth

Cycle the active pen width through the built-in preset list.

ToggleSpotlight

Toggle the spotlight overlay.

SetSpotlightPosition(f32, f32)

Update the spotlight center position (normalized coordinates).

ToggleZoom

Toggle zoom mode on the audience display.

SetZoomRegion

Set the zoom region center and magnification factor.

Fields

center: (f32, f32)

factor: f32

StartTimer

Start the timer (or resume if paused).

PauseTimer

Pause the timer.

ToggleTimer

Toggle the timer between running and paused.

ResetTimer

Reset the timer to its initial state.

ToggleSlideOverview

Toggle the slide overview grid.

ToggleNotesPanel

Toggle the notes panel visibility.

ToggleNotesEdit

Toggle inline markdown editing for the current slide’s notes.

SetCurrentSlideNotes(String)

Replace the current slide’s notes markdown.

IncrementNotesFontSize

Increase notes font size by one step.

DecrementNotesFontSize

Decrease notes font size by one step.

ToggleTextBoxMode

Toggle text box placement mode.

PlaceTextBox

Place a new text box on the current slide (normalized coordinates).

Fields

x: f32

y: f32

w: f32

h: f32

EditTextBoxContent

Update the content of a text box.

Fields

id: u64

content: String

MoveTextBox

Move a text box to a new position (normalized coordinates).

Fields

id: u64

x: f32

y: f32

ResizeTextBox

Resize a text box (normalized size).

Fields

id: u64

w: f32

h: f32

DeleteTextBox

Delete a text box by ID.

Fields

id: u64

SelectTextBox(u64)

Select a text box by ID.

DeselectTextBox

Deselect the currently selected text box.

BeginTextBoxEdit

Enter inline edit mode for the selected text box.

Fields

id: u64

SetTextBoxFontSize

Set the font size of a text box.

Fields

id: u64

size: f32

SetTextBoxColor

Set the text color of a text box (RGBA).

Fields

id: u64

color: [u8; 4]

SetTextBoxBackground

Set the background fill of a text box (RGBA, or None to clear).

Fields

id: u64

color: Option<[u8; 4]>

Quit

Quit the application.

SaveSidecar

Save the current sidecar data to disk.

Trait Implementations

impl Clone for Command

fn clone(&self) -> Command

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for Command

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

Formats the value using the given formatter.

impl PartialEq for Command

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

Tests for self and other values to be equal, and is used by ==.

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

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

impl StructuralPartialEq for Command