Class: MotionBindable::Strategy

Inherits:
Object
  • Object
show all
Defined in:
lib/motion_bindable/strategy.rb

Overview

Represents a binding strategy. Designed to be as flexible as possible.

Direct Known Subclasses

MotionBindable::Strategies::UITextField

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(object, attribute) ⇒ Strategy

Returns a new instance of Strategy.



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# File 'lib/motion_bindable/strategy.rb', line 23

def initialize(object, attribute)
  @attribute = attribute.to_sym
  self.object = object
end

Instance Attribute Details

#bound ⇒ Object

Returns the value of attribute bound.



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# File 'lib/motion_bindable/strategy.rb', line 21

def bound
  @bound
end

#object ⇒ Object

Returns the value of attribute object.



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# File 'lib/motion_bindable/strategy.rb', line 20

def object
  @object
end

Class Method Details

.find_by_reference(object) ⇒ Object 



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# File 'lib/motion_bindable/strategy.rb', line 14

def self.find_by_reference(object)
  @strategies_map.reverse.find do |h|
    h[:candidates].include? object.class
  end.fetch(:class)
end

.register_strategy(strategy, *objects) ⇒ Object 



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# File 'lib/motion_bindable/strategy.rb', line 10

def self.register_strategy(strategy, *objects)
  @strategies_map << { class: strategy, candidates: objects }
end

Instance Method Details

#attribute ⇒ Object 



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# File 'lib/motion_bindable/strategy.rb', line 43

def attribute
  object.send(@attribute)
end

#attribute=(value) ⇒ Object 



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# File 'lib/motion_bindable/strategy.rb', line 47

def attribute=(value)
  object.send(:"#{@attribute.to_s}=", value)
end

#bind(bound) ⇒ Object 



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# File 'lib/motion_bindable/strategy.rb', line 28

def bind(bound)
  self.bound = bound
  on_bind

  self
end

#on_bind ⇒ Object 



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# File 'lib/motion_bindable/strategy.rb', line 39

def on_bind
  refresh
end

#refresh ⇒ Object

You can either choose to just override #refresh for objects that can't be bound with callbacks. Or override #on_bind for objects that can be bound with a callback.



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# File 'lib/motion_bindable/strategy.rb', line 38

def refresh; end