Class: CalculatorPage

Inherits:
UnderOs::Page
  • Object
show all
Defined in:
app/pages/calculator_page.rb

Instance Method Summary collapse

Constructor Details

#initialize ⇒ CalculatorPage

Returns a new instance of CalculatorPage.



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# File 'app/pages/calculator_page.rb', line 3

def initialize
  @label = first('#result')

  find('button').each do |b|
    b.on(:tap){|e| handle_tap(e)}
  end
end

Instance Method Details

#calculate ⇒ Object 



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# File 'app/pages/calculator_page.rb', line 27

def calculate
  return if ! @first_value

  values = [@first_value, @label.text]
  values = values.any?{|v| v.include?('.')} ? values.map(&:to_f) : values.map(&:to_i)

  @label.text = values[0].send(@operator, values[1]).to_s
end

#handle_tap(event) ⇒ Object 



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# File 'app/pages/calculator_page.rb', line 11

def handle_tap(event)
  case event.target.text
  when '0','1','2','3','4','5','6','7','8','9','.'
    @label.text  = '' if ['0', @first_value].include?(@label.text)
    @label.text += event.target.text if @label.text.size < 18
  when '÷','×','-','+'
    @first_value = @label.text
    @operator    = {'÷'=>'/','×'=>'*','-'=>'-','+'=>'+'}[event.target.text]
  when 'C'
    @first_value = nil
    @label.text  = '0'
  when '='
    calculate
  end
end