Class: MotionKit::PointConstraint

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

#initialize

Methods inherited from Constraint

#<=, #==, #>=, attribute_lookup, attribute_reverse, axis_lookup, calculate?, constant?, #equals, #gte, #initialize, #is, #lte, #of, orientation_lookup, priority_lookup, relationship_lookup, relationship_reverse, view_lookup

Constructor Details

This class inherits a constructor from MotionKit::CompoundConstraint

Instance Method Details

#constant=(constant) ⇒ Object 



588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
 
# File 'lib/motion-kit-cocoa/constraints/constraint.rb', line 588

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

    if constant.key?(:x)
      @constant[0] = constant[:x]
    end

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

  self.relative_to ||= :superview
  self.update_constraint
end

#divided_by(multiplier) ⇒ Object 



708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
 
# File 'lib/motion-kit-cocoa/constraints/constraint.rb', line 708

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?(:x)
      self.multiplier[0] /= multiplier[:x].to_f
    end

    if multiplier.key?(:y)
      self.multiplier[1] /= multiplier[:y].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 



658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
 
# File 'lib/motion-kit-cocoa/constraints/constraint.rb', line 658

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?(:x)
      self.constant[0] -= constant[:x]
    elsif constant.key?(:right)
      self.constant[0] -= constant[:right]
    elsif constant.key?(:left)
      self.constant[0] += constant[:left]
    end

    if constant.key?(:y)
      self.constant[1] -= constant[:y]
    elsif constant.key?(:up)
      self.constant[1] -= constant[:up]
    elsif constant.key?(:down)
      self.constant[1] += constant[:down]
    end
  else
    self.constant[0] -= constant
    self.constant[1] -= constant
  end

  self.update_constraint
  self
end

#multiplier=(multiplier) ⇒ Object 



609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
 
# File 'lib/motion-kit-cocoa/constraints/constraint.rb', line 609

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

    if multiplier.key?(:x)
      @multiplier[0] = multiplier[:x]
    end

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

  self.update_constraint
end

#plus(constant) ⇒ Object 



629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
 
# File 'lib/motion-kit-cocoa/constraints/constraint.rb', line 629

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?(:x)
      self.constant[0] += constant[:x]
    elsif constant.key?(:right)
      self.constant[0] += constant[:right]
    elsif constant.key?(:left)
      self.constant[0] -= constant[:left]
    end

    if constant.key?(:y)
      self.constant[1] += constant[:y]
    elsif constant.key?(:up)
      self.constant[1] += constant[:up]
    elsif constant.key?(:down)
      self.constant[1] -= constant[:down]
    end
  else
    self.constant[0] += constant
    self.constant[1] += constant
  end

  self.update_constraint
  self
end

#resolve_all(layout, view) ⇒ Object 



738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
 
# File 'lib/motion-kit-cocoa/constraints/constraint.rb', line 738

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)

    [0, 1].map do |index|
      attribute = Constraint.attribute_lookup(self.attribute[index])
      mul = self.multiplier[index]
      const = self.constant[index]

      nsconstraint = NSLayoutConstraint.constraintWithItem(item,
        attribute: attribute,
        relatedBy: relationship,
        toItem: rel_item,
        attribute: attribute,
        multiplier: mul,
        constant: const
        )

      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 



687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
 
# File 'lib/motion-kit-cocoa/constraints/constraint.rb', line 687

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?(:x)
      self.multiplier[0] *= multiplier[:x]
    end

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

  self.update_constraint
  self
end

#update_constraint ⇒ Object 



729
730
731
732
733
734
735
736
 
# File 'lib/motion-kit-cocoa/constraints/constraint.rb', line 729

def update_constraint
  if @resolved
    [0, 1].each do |index|
      constraint = @resolved[index]
      constraint.constant = self.constant[index]
    end
  end
end