`class DisplayView`

The audience-facing display view that renders the current slide full-screen.

Connects to the class Presently::PresentationController as a listener and updates whenever the slide changes. Pushes the current state on WebSocket reconnect.

Definitions

`def initialize(id = Live::Element.unique_id, data = {}, controller: nil)`

Initialize a new display view.

Signature

parameter　id　String: The unique element identifier.
parameter　data　Hash: The element data attributes.
parameter　controller　PresentationController | Nil: The shared presentation controller.

Implementation

def initialize(id = Live::Element.unique_id, data = {}, controller: nil)
	super(id, data)
	@controller = controller
	@slide_renderer = SlideRenderer.new(css_class: "slide current", templates: controller&.templates)
end

`def bind(page)`

Bind this view to a page and register as a listener. Immediately pushes the current state to the client.

Signature

parameter　page　Live::Page: The page this view is bound to.

Implementation

def bind(page)
	super
	@controller.add_listener(self)
	self.update!
end

`def close`

Close this view and unregister as a listener.

Implementation

def close
	@controller.remove_listener(self)
	super
end

`def slide_changed!`

Called by the controller when the slide changes.

Implementation

def slide_changed!
	self.update!
end

`def handle(event)`

Handle an event from the client.

Signature

parameter　event　Hash: The event data with :detail containing the action.

Implementation

def handle(event)
	case event.dig(:detail, :action)
	when "next"
		@controller.advance!
	when "previous"
		@controller.retreat!
	end
end

`def render(builder)`

Render the display view.

Signature

parameter　builder　XRB::Builder: The HTML builder.

Implementation

def render(builder)
	slide = @controller.current_slide
	return unless slide
	
	builder.tag(:div, class: "display", data: {transition: slide.transition}) do
		builder.tag(:div, class: "slide-container") do
			@slide_renderer.render(builder, slide)
		end
		
		builder.tag(:div, class: "slide-counter") do
			builder.text("#{@controller.current_index + 1} / #{@controller.slide_count}")
		end
	end
end