Class: Teacup::Constraint
- Inherits:
-
Object
- Object
- Teacup::Constraint
- Defined in:
- lib/teacup/constraint.rb
Constant Summary collapse
- Priorities =
{ required: 1000, # NSLayoutPriorityRequired high: 750, # NSLayoutPriorityDefaultHigh medium: 500, low: 250, # NSLayoutPriorityDefaultLow }
- Relationships =
NSLayoutPriorityDefaultLow
{}
- Attributes =
{}
Instance Attribute Summary collapse
-
#attribute ⇒ Object
Returns the value of attribute attribute.
-
#attribute2 ⇒ Object
Returns the value of attribute attribute2.
-
#constant ⇒ Object
Returns the value of attribute constant.
-
#identifier(identifier = nil) ⇒ Object
Returns the value of attribute identifier.
-
#multiplier ⇒ Object
Returns the value of attribute multiplier.
-
#priority(priority = nil) ⇒ Object
Returns the value of attribute priority.
-
#relationship ⇒ Object
Returns the value of attribute relationship.
-
#relative_to ⇒ Object
Returns the value of attribute relative_to.
-
#target ⇒ Object
Returns the value of attribute target.
Class Method Summary collapse
Instance Method Summary collapse
- #copy ⇒ Object
- #divided_by(multiplier) ⇒ Object
- #equals(relative_to, attribute2 = nil) ⇒ Object
- #gte(relative_to, attribute2 = nil) ⇒ Object (also: #at_least, #is_at_least)
-
#initialize(target = nil, attribute = nil) ⇒ Constraint
constructor
A new instance of Constraint.
- #inspect ⇒ Object
- #lte(relative_to, attribute2 = nil) ⇒ Object (also: #at_most, #is_at_most)
- #minus(constant) ⇒ Object
- #nslayoutconstraint ⇒ Object
- #plus(constant) ⇒ Object
- #set_relationship(relation, relative_to, attribute2) ⇒ Object
- #times(multiplier) ⇒ Object
Constructor Details
#initialize(target = nil, attribute = nil) ⇒ Constraint
Returns a new instance of Constraint.
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# File 'lib/teacup/constraint.rb', line 117 def initialize(target=nil, attribute=nil) self.target = target self.attribute = attribute self.constant = 0 self.multiplier = 1 self.priority = :high # this is the xcode default end |
Instance Attribute Details
#attribute ⇒ Object
Returns the value of attribute attribute.
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# File 'lib/teacup/constraint.rb', line 4 def attribute @attribute end |
#attribute2 ⇒ Object
Returns the value of attribute attribute2.
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# File 'lib/teacup/constraint.rb', line 7 def attribute2 @attribute2 end |
#constant ⇒ Object
Returns the value of attribute constant.
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# File 'lib/teacup/constraint.rb', line 9 def constant @constant end |
#identifier(identifier = nil) ⇒ Object
Returns the value of attribute identifier.
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# File 'lib/teacup/constraint.rb', line 11 def identifier @identifier end |
#multiplier ⇒ Object
Returns the value of attribute multiplier.
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# File 'lib/teacup/constraint.rb', line 8 def multiplier @multiplier end |
#priority(priority = nil) ⇒ Object
Returns the value of attribute priority.
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# File 'lib/teacup/constraint.rb', line 10 def priority @priority end |
#relationship ⇒ Object
Returns the value of attribute relationship.
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# File 'lib/teacup/constraint.rb', line 5 def relationship @relationship end |
#relative_to ⇒ Object
Returns the value of attribute relative_to.
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# File 'lib/teacup/constraint.rb', line 6 def relative_to @relative_to end |
#target ⇒ Object
Returns the value of attribute target.
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# File 'lib/teacup/constraint.rb', line 3 def target @target end |
Class Method Details
.from_sym(sym, relative_to = :superview) ⇒ Object
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# File 'lib/teacup/constraint.rb', line 44 def self.from_sym(sym, relative_to=:superview) case sym when :full [ self.new(:self, :left).equals(relative_to, :left), self.new(:self, :top).equals(relative_to, :top), self.new(:self, :width).equals(relative_to, :width), self.new(:self, :height).equals(relative_to, :height), ] when :full_width [ self.new(:self, :center_x).equals(relative_to, :center_x), self.new(:self, :width).equals(relative_to, :width), ] when :full_height [ self.new(:self, :center_y).equals(relative_to, :center_y), self.new(:self, :height).equals(relative_to, :height), ] when :center_x [ self.new(:self, :center_x).equals(:superview, :center_x), ] when :center_y [ self.new(:self, :center_y).equals(:superview, :center_y), ] when :centered [ self.new(:self, :center_x).equals(:superview, :center_x), self.new(:self, :center_y).equals(:superview, :center_y), ] when :top [ self.new(:self, :top).equals(relative_to, :top), ] when :right [ self.new(:self, :right).equals(relative_to, :right), ] when :bottom [ self.new(:self, :bottom).equals(relative_to, :bottom), ] when :left [ self.new(:self, :left).equals(relative_to, :left), ] when :top_left, :topleft [ self.new(:self, :left).equals(relative_to, :left), self.new(:self, :top).equals(relative_to, :top), ] when :top_right, :topright [ self.new(:self, :right).equals(relative_to, :right), self.new(:self, :top).equals(relative_to, :top), ] when :bottom_right, :bottomright [ self.new(:self, :right).equals(relative_to, :right), self.new(:self, :bottom).equals(relative_to, :bottom), ] when :bottom_left, :bottomleft [ self.new(:self, :left).equals(relative_to, :left), self.new(:self, :bottom).equals(relative_to, :bottom), ] else raise "Unknown symbol #{sym.inspect}" end end |
Instance Method Details
#copy ⇒ Object
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# File 'lib/teacup/constraint.rb', line 198 def copy copy = self.class.new(self.target, self.attribute) copy.relationship = self.relationship copy.relative_to = self.relative_to copy.attribute2 = self.attribute2 copy.multiplier = self.multiplier copy.constant = self.constant copy.priority = self.priority copy.identifier = self.identifier copy end |
#divided_by(multiplier) ⇒ Object
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# File 'lib/teacup/constraint.rb', line 168 def divided_by(multiplier) times 1.0/multiplier end |
#equals(relative_to, attribute2 = nil) ⇒ Object
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# File 'lib/teacup/constraint.rb', line 125 def equals(relative_to, attribute2=nil) self.set_relationship(NSLayoutRelationEqual, relative_to, attribute2) end |
#gte(relative_to, attribute2 = nil) ⇒ Object Also known as: at_least, is_at_least
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# File 'lib/teacup/constraint.rb', line 135 def gte(relative_to, attribute2=nil) self.set_relationship(NSLayoutRelationGreaterThanOrEqual, relative_to, attribute2) end |
#inspect ⇒ Object
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# File 'lib/teacup/constraint.rb', line 210 def inspect "#<#{self.class.name} ##{object_id.to_s(16)}" + " target=#{target.inspect}" + " attribute=#{attribute_reverse(attribute).inspect}" + " relationship=#{relationship_reverse(relationship).inspect}" + " relative_to=#{relative_to.inspect}" + " attribute2=#{attribute_reverse(attribute2).inspect}" + " multiplier=#{multiplier.inspect}" + " constant=#{constant.inspect}" + ">" end |
#lte(relative_to, attribute2 = nil) ⇒ Object Also known as: at_most, is_at_most
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# File 'lib/teacup/constraint.rb', line 129 def lte(relative_to, attribute2=nil) self.set_relationship(NSLayoutRelationLessThanOrEqual, relative_to, attribute2) end |
#minus(constant) ⇒ Object
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# File 'lib/teacup/constraint.rb', line 180 def minus(constant) plus -constant end |
#nslayoutconstraint ⇒ Object
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# File 'lib/teacup/constraint.rb', line 222 def nslayoutconstraint nsconstraint = NSLayoutConstraint.constraintWithItem( self.target, attribute: self.attribute, relatedBy: self.relationship, toItem: self.relative_to, attribute: self.attribute2, multiplier: self.multiplier, constant: self.constant ) nsconstraint.priority = priority_lookup(self.priority) nsconstraint.setIdentifier(self.identifier) if self.identifier return nsconstraint end |
#plus(constant) ⇒ Object
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# File 'lib/teacup/constraint.rb', line 172 def plus(constant) if not self.relationship constant = -constant end self.constant += constant self end |
#set_relationship(relation, relative_to, attribute2) ⇒ Object
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# File 'lib/teacup/constraint.rb', line 141 def set_relationship(relation, relative_to, attribute2) if attribute2.nil? self.constant = relative_to self.relative_to = nil self.attribute2 = :none else self.relative_to = relative_to self.attribute2 = attribute2 end self.relationship = relation self end |
#times(multiplier) ⇒ Object
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# File 'lib/teacup/constraint.rb', line 163 def times(multiplier) self.multiplier *= multiplier self end |