Class: RoadToRubykaigi::CalibrationBar

Inherits:
Object
  • Object
show all
Defined in:
lib/road_to_rubykaigi/calibration_bar.rb

Constant Summary collapse

BAR_WIDTH = 
100
BAR_MAX = 
2.5
EMOJI_WIDTH = 
2
BOUNCE_HZ = 
4
BASE_X = 
5
EMOJI_BOUNCE_Y = 
6
EMOJI_BASE_Y = 
EMOJI_BOUNCE_Y + 1
MESSAGES = 
{
  remaining: [5, 5, "#{ANSI::BOLD}%-20s#{ANSI::RESET}  %5.1fs"],
  intensity: [5, 8, '[%s] %.4f'],
}.freeze
LABELS = 
{
  static: { text: 'Hold still', emoji: '🧍' },
  walk:   { text: 'Walk',       emoji: '🚶‍➡️', emoji_bounce: '🏃‍➡️' },
  jump:   { text: 'Jump',       emoji: '🧍',    emoji_bounce: '🤸' },
}.freeze

Class Method Summary collapse

Instance Method Summary collapse

Class Method Details

.clear_emoji ⇒ Object 



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# File 'lib/road_to_rubykaigi/calibration_bar.rb', line 25

def self.clear_emoji
  blank = ' ' * (BAR_WIDTH + EMOJI_WIDTH)
  [
    [BASE_X + 1, EMOJI_BOUNCE_Y, blank],
    [BASE_X + 1, EMOJI_BASE_Y, blank],
  ]
end

.states ⇒ Object 



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# File 'lib/road_to_rubykaigi/calibration_bar.rb', line 23

def self.states = LABELS.keys.dup

Instance Method Details

#render ⇒ Object 



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# File 'lib/road_to_rubykaigi/calibration_bar.rb', line 33

def render
  result = [
    format_line(MESSAGES[:remaining], "▶ #{@label[:text]}", @sampler.remaining),
    format_line(MESSAGES[:intensity], bar, @sampler.intensity),
  ]

  if bouncing_state?
    emoji_x = BASE_X + 1 + (@sampler.progress * BAR_WIDTH).to_i.clamp(0, BAR_WIDTH)
    # Clear previous emoji
    unless @prev_emoji_x == emoji_x
      result << [@prev_emoji_x, EMOJI_BOUNCE_Y, ' ' * EMOJI_WIDTH]
      result << [@prev_emoji_x, EMOJI_BASE_Y, ' ' * EMOJI_WIDTH]
      @prev_emoji_x = emoji_x
    end

    if bouncing?
      result << [emoji_x, EMOJI_BOUNCE_Y, @label[:emoji_bounce]]
      result << [emoji_x, EMOJI_BASE_Y, ' ' * EMOJI_WIDTH]
    else
      result << [emoji_x, EMOJI_BOUNCE_Y, ' ' * EMOJI_WIDTH]
      result << [emoji_x, EMOJI_BASE_Y, @label[:emoji]]
    end
  else
    result << [BASE_X + 1, EMOJI_BASE_Y, @label[:emoji]]
  end

  result
end