Module: MotionKit::SizeCalculator

Included in:
ViewCalculator
Defined in:
lib/motion-kit/calculator/size_calculator.rb

Instance Method Summary collapse

Instance Method Details

#calculate_scaled_width_height(w, h, view, full_view) ⇒ Object 



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# File 'lib/motion-kit/calculator/size_calculator.rb', line 35

def calculate_scaled_width_height(w, h, view, full_view)
  # scaling is handled a little differently, because it is dependent on
  # the other amount and the intrinsic size.
  if w == :scale && h == :scale
    raise "Either width or height can be :scale, but not both"
  elsif w == :scale
    h = calculate(view, :height, h, full_view)
    size = intrinsic_size(view)
    w = h * size.width / size.height
  elsif h == :scale
    w = calculate(view, :width, w, full_view)
    size = intrinsic_size(view)
    h = w * size.height / size.width
  end
  return w, h
end

#calculate_size(view, amount, full_view) ⇒ Object 



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# File 'lib/motion-kit/calculator/size_calculator.rb', line 6

def calculate_size(view, amount, full_view)
  if amount.is_a?(Array) || amount.is_a?(Hash)
    calculate_size_from_multiple(view, amount, full_view)
  elsif amount == :full
    w = calculate(view, :width, '100%', full_view)
    h = calculate(view, :height, '100%', full_view)
    return CGSize.new(w, h)
  elsif amount == :auto
    return intrinsic_size(view)
  elsif amount.is_a?(Symbol)
    raise "Unrecognized amount symbol #{amount.inspect} in MotionKit#calculate_size"
  else
    return amount
  end
end

#calculate_size_from_multiple(view, amount, full_view) ⇒ Object 



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# File 'lib/motion-kit/calculator/size_calculator.rb', line 22

def calculate_size_from_multiple(view, amount, full_view)
  w, h = resolve_width_and_height(view, amount)

  if w == :scale || h == :scale
    w, h = calculate_scaled_width_height(w, h, view, full_view)
  else
    w = calculate(view, :width, w, full_view)
    h = calculate(view, :height, h, full_view)
  end

  return CGSize.new(w, h)
end

#resolve_width_and_height(view, amount) ⇒ Object 



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# File 'lib/motion-kit/calculator/size_calculator.rb', line 52

def resolve_width_and_height(view, amount)
  if amount.is_a?(Hash)
    w = amount[:w] || amount[:width]  || view.frame.size.width
    h = amount[:h] || amount[:height] || view.frame.size.height
  else
    w = amount[0]
    h = amount[1]
  end
  return w, h
end