Progresso e timer

extends Node

const DURATION: float = 4.0

var bar: ProgressBar
var countdown: Label
var timer: Timer
var running: bool = true


func _ready() -> void:
	var column: VBoxContainer = _root()

	var title: Label = Label.new()
	title.text = 'Timer drives the bar'
	title.add_theme_font_size_override('font_size', 26)
	column.add_child(title)

	bar = ProgressBar.new()
	bar.max_value = DURATION
	bar.show_percentage = false
	bar.custom_minimum_size = Vector2(420, 26)
	bar.add_theme_stylebox_override('background', _bar_style(Color('#2a2f3d')))
	bar.add_theme_stylebox_override('fill', _bar_style(Color('#8eef97')))
	column.add_child(bar)

	countdown = Label.new()
	countdown.add_theme_color_override('font_color', Color('#8eef97'))
	column.add_child(countdown)

	var toggle: Button = Button.new()
	toggle.text = 'pause'
	toggle.pressed.connect(func(): _toggle(toggle))
	column.add_child(toggle)

	timer = Timer.new()
	timer.wait_time = DURATION
	timer.timeout.connect(_on_timeout)
	add_child(timer)
	timer.start()


func _process(_delta: float) -> void:
	bar.value = DURATION - timer.time_left
	countdown.text = '%.1f s left' % timer.time_left


func _on_timeout() -> void:
	bar.value = 0
	timer.start()


func _toggle(button: Button) -> void:
	running = not running
	timer.paused = not running
	button.text = 'resume' if not running else 'pause'


func _bar_style(color: Color) -> StyleBoxFlat:
	var style: StyleBoxFlat = StyleBoxFlat.new()
	style.bg_color = color
	style.set_corner_radius_all(6)

	return style


func _root() -> VBoxContainer:
	var background: ColorRect = ColorRect.new()
	background.color = Color('#12141a')
	add_child(background)
	background.set_anchors_and_offsets_preset(Control.PRESET_FULL_RECT)

	var center: CenterContainer = CenterContainer.new()
	add_child(center)
	center.set_anchors_and_offsets_preset(Control.PRESET_FULL_RECT)

	var column: VBoxContainer = VBoxContainer.new()
	column.add_theme_constant_override('separation', 20)
	center.add_child(column)

	return column