Class: MotionKit::SizeConstraint

Inherits:
CompoundConstraint show all
Defined in:
lib/motion-kit-cocoa/constraints/size_constraint.rb

Constant Summary

Constants inherited from Constraint

Constraint::Attributes, Constraint::Priorities, Constraint::Relationships

Instance Attribute Summary

Attributes inherited from Constraint

#attribute, #attribute2, #constant, #identifier, #multiplier, #priority, #relationship, #relative_to, #target

Instance Method Summary collapse

Methods inherited from CompoundConstraint

#update_constraint

Methods inherited from Constraint

#<=, #==, #>=, #activate, #active, #active=, attribute_lookup, attribute_reverse, axis_lookup, calculate?, #common_ancestor, constant?, #deactivate, #equals, #gte, #is, #lte, #of, orientation_lookup, priority_lookup, relationship_lookup, relationship_reverse, #update_constraint, view_lookup

Constructor Details

#initialize(target, attribute = nil, relationship = :equal) ⇒ SizeConstraint

Returns a new instance of SizeConstraint.



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# File 'lib/motion-kit-cocoa/constraints/size_constraint.rb', line 6

def initialize(target, attribute=nil, relationship=:equal)
  super
  @attribute = [:width, :height]
  @attribute2 = [:width, :height]
end

Instance Method Details

#attribute2=(value) ⇒ Object

Raises:

  • (NoMethodError) 


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# File 'lib/motion-kit-cocoa/constraints/size_constraint.rb', line 16

def attribute2=(value)
  raise NoMethodError.new("undefined method `#{:attribute2=}' for #{self}:#{self.class}", :attribute2=)
end

#attribute=(value) ⇒ Object

Raises:

  • (NoMethodError) 


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# File 'lib/motion-kit-cocoa/constraints/size_constraint.rb', line 12

def attribute=(value)
  raise NoMethodError.new("undefined method `#{:attribute=}' for #{self}:#{self.class}", :attribute=)
end

#constant=(constant) ⇒ Object 



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# File 'lib/motion-kit-cocoa/constraints/size_constraint.rb', line 20

def constant=(constant)
  if constant.is_a?(Array)
    @constant = constant[0..1]
  elsif constant.is_a?(Hash)
    @constant = [0, 0]

    if constant.key?(:w)
      @constant[0] = constant[:w]
    elsif constant.key?(:width)
      @constant[0] = constant[:width]
    end

    if constant.key?(:h)
      @constant[1] = constant[:h]
    elsif constant.key?(:height)
      @constant[1] = constant[:height]
    end
  else
    @constant = [constant, constant]
  end

  self.update_constraint
end

#divided_by(multiplier) ⇒ Object 



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# File 'lib/motion-kit-cocoa/constraints/size_constraint.rb', line 143

def divided_by(multiplier)
  if multiplier.is_a?(Array)
    self.multiplier[0] /= multiplier[0].to_f
    self.multiplier[1] /= multiplier[1].to_f
  elsif multiplier.is_a?(Hash)
    if multiplier.key?(:w)
      self.multiplier[0] /= multiplier[:w].to_f
    elsif multiplier.key?(:width)
      self.multiplier[0] /= multiplier[:width].to_f
    end

    if multiplier.key?(:h)
      self.multiplier[1] /= multiplier[:h].to_f
    elsif multiplier.key?(:height)
      self.multiplier[1] /= multiplier[:height].to_f
    end
  else
    self.multiplier[0] /= multiplier.to_f
    self.multiplier[1] /= multiplier.to_f
  end

  self.update_constraint
  self
end

#minus(constant) ⇒ Object 



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# File 'lib/motion-kit-cocoa/constraints/size_constraint.rb', line 93

def minus(constant)
  if constant.is_a?(Array)
    self.constant[0] -= constant[0]
    self.constant[1] -= constant[1]
  elsif constant.is_a?(Hash)
    if constant.key?(:w)
      self.constant[0] -= constant[:w]
    elsif constant.key?(:width)
      self.constant[0] -= constant[:width]
    end

    if constant.key?(:h)
      self.constant[1] -= constant[:h]
    elsif constant.key?(:height)
      self.constant[1] -= constant[:height]
    end
  else
    self.constant[0] -= constant
    self.constant[1] -= constant
  end

  self.update_constraint
  self
end

#multiplier=(multiplier) ⇒ Object 



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# File 'lib/motion-kit-cocoa/constraints/size_constraint.rb', line 44

def multiplier=(multiplier)
  if multiplier.is_a?(Array)
    @multiplier = multiplier[0..1]
  elsif multiplier.is_a?(Hash)
    @multiplier = [0, 0]

    if multiplier.key?(:w)
      @multiplier[0] = multiplier[:w]
    elsif multiplier.key?(:width)
      @multiplier[0] = multiplier[:width]
    end

    if multiplier.key?(:h)
      @multiplier[1] = multiplier[:h]
    elsif multiplier.key?(:height)
      @multiplier[1] = multiplier[:height]
    end
  else
    @multiplier = [multiplier, multiplier]
  end

  self.update_constraint
end

#plus(constant) ⇒ Object 



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# File 'lib/motion-kit-cocoa/constraints/size_constraint.rb', line 68

def plus(constant)
  if constant.is_a?(Array)
    self.constant[0] += constant[0]
    self.constant[1] += constant[1]
  elsif constant.is_a?(Hash)
    if constant.key?(:w)
      self.constant[0] += constant[:w]
    elsif constant.key?(:width)
      self.constant[0] += constant[:width]
    end

    if constant.key?(:h)
      self.constant[1] += constant[:h]
    elsif constant.key?(:height)
      self.constant[1] += constant[:height]
    end
  else
    self.constant[0] += constant
    self.constant[1] += constant
  end

  self.update_constraint
  self
end

#resolve_all(layout, view) ⇒ Object 



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# File 'lib/motion-kit-cocoa/constraints/size_constraint.rb', line 168

def resolve_all(layout, view)
  @resolved ||= begin
    item = Constraint.view_lookup(layout, view, self.target)
    rel_item = Constraint.view_lookup(layout, view, self.relative_to)
    relationship = Constraint.relationship_lookup(self.relationship)

    [[:width, 0], [:height, 1]].map do |attr_name, index|
      attribute = Constraint.attribute_lookup(attr_name)
      nsconstraint = NSLayoutConstraint.constraintWithItem(item,
        attribute: attribute,
        relatedBy: relationship,
        toItem: rel_item,
        attribute: attribute,
        multiplier: self.multiplier[index],
        constant: self.constant[index]
        )

      if self.priority
        nsconstraint.priority = Constraint.priority_lookup(self.priority)
      end

      if self.identifier
        nsconstraint.setIdentifier(self.identifier)
      end

      nsconstraint
    end
  end
end

#times(multiplier) ⇒ Object 



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# File 'lib/motion-kit-cocoa/constraints/size_constraint.rb', line 118

def times(multiplier)
  if multiplier.is_a?(Array)
    self.multiplier[0] *= multiplier[0]
    self.multiplier[1] *= multiplier[1]
  elsif multiplier.is_a?(Hash)
    if multiplier.key?(:w)
      self.multiplier[0] *= multiplier[:w]
    elsif multiplier.key?(:width)
      self.multiplier[0] *= multiplier[:width]
    end

    if multiplier.key?(:h)
      self.multiplier[1] *= multiplier[:h]
    elsif multiplier.key?(:height)
      self.multiplier[1] *= multiplier[:height]
    end
  else
    self.multiplier[0] *= multiplier
    self.multiplier[1] *= multiplier
  end

  self.update_constraint
  self
end