Class: MotionKit::ViewCalculator

Inherits:
Object
  • Object
show all
Extended by:
FrameCalculator, OriginCalculator, SizeCalculator
Defined in:
lib/motion-kit-cocoa/calculator/view_calculator.rb

Class Method Summary collapse

Methods included from OriginCalculator

calculate_absolute_from_hash, calculate_from_center, calculate_from_hash, calculate_from_hash_array, calculate_origin, calculate_relative_from_hash

Methods included from SizeCalculator

calculate_scaled_width_height, calculate_size, calculate_size_from_multiple, resolve_width_and_height

Methods included from FrameCalculator

calculate_frame, calculate_frame_from_array, calculate_frame_from_hash, calculate_frame_from_symbol

Class Method Details

.calculate(view, dimension, amount, full_view = nil) ⇒ Object 



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# File 'lib/motion-kit-cocoa/calculator/view_calculator.rb', line 12

def self.calculate(view, dimension, amount, full_view=nil)
  if amount.is_a? Proc
    return view.instance_exec(&amount)
  elsif dimension == :origin || dimension == :center
    return calculate_origin(view, dimension, amount, nil, full_view)
  elsif dimension == :size
    return calculate_size(view, amount, full_view)
  elsif dimension == :frame
    return calculate_frame(view, amount, full_view)
  elsif amount == :full
    return calculate(view, dimension, '100%', full_view)
  elsif amount == :auto
    return intrinsic_size(view).send(dimension) # :left or :right
  elsif amount.is_a?(String) && amount.include?('%')
    if not full_view
      if view.is_a?(CALayer)
        full_view = view.superlayer
      elsif view.respond_to?(:superview)
        full_view = view.superview
      end

      if not full_view
        raise NoSuperviewError.new("Cannot calculate #{amount.inspect} of #{dimension.inspect} because view #{view} has no superview.")
      end
    end
    calc = Calculator.scan(amount)

    raise "Unknown dimension #{dimension}" unless [:width, :height].include?(dimension)
    return (full_view.frame.size.send(dimension) * calc.factor + calc.constant).round
  else
    return amount
  end
end

.intrinsic_size(view) ⇒ Object 



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# File 'lib/motion-kit-cocoa/calculator/view_calculator.rb', line 46

def self.intrinsic_size(view)
  size_that_fits = view.intrinsicContentSize
  if size_that_fits.width == MotionKit.no_intrinsic_metric
    size_that_fits.width = 0
  end
  if size_that_fits.height == MotionKit.no_intrinsic_metric
    size_that_fits.height = 0
  end
  return size_that_fits
end