Module: Loco::Observable

Included in:
Controller, Model, RecordArray, Resizable, UI::TableViewCell, ViewController
Defined in:
lib/motion-loco/observable.rb

Defined Under Namespace

Modules: ClassMethods

Instance Method Summary collapse

Dynamic Method Handling

This class handles dynamic methods through the method_missing method

#method_missing(method, *args, &block) ⇒ Object 



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# File 'lib/motion-loco/observable.rb', line 46

def method_missing(method, *args, &block)
  if method.end_with?('_binding=') || method.end_with?('Binding=')
    method = method.gsub('_binding=', '').gsub('Binding=', '')
    if args.first.is_a?(String)
      if args.first =~ /^[A-Z]/
        split_args = args.first.split('.')
        target = split_args.slice!(0).constantize.instance
        key_path = split_args.join('.')
      else
        target = self
        key_path = args.first
      end
    else
      target = args.first.first
      key_path = args.first.last
    end
    self.setValue(target.valueForKeyPath(key_path), forKey:method)
    register_observer(target, key_path) do
      self.setValue(target.valueForKeyPath(key_path), forKey:method)
    end
  else
    super
  end
end

Instance Method Details

#init ⇒ Object

Used to create observable view controllers.



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# File 'lib/motion-loco/observable.rb', line 7

def init
  super
  initialize_bindings
  set_properties({})
  self
end

#initialize(properties = {}) ⇒ Object

Create new instance from a hash of properties with values.

Parameters:

  • properties (Hash) (defaults to: {}) 


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# File 'lib/motion-loco/observable.rb', line 16

def initialize(properties={})
  super
  initialize_bindings
  set_properties(properties)
  self
end

#register_observer(target, key_path, &block) ⇒ Object 



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# File 'lib/motion-loco/observable.rb', line 71

def register_observer(target, key_path, &block)
  unless observer_is_registered?(target, key_path)
    target.addObserver(self, forKeyPath:key_path.to_s, options:0, context:nil) 
  end
  observers_for(target, key_path) << block
end

#remove_all_observers ⇒ Object 



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# File 'lib/motion-loco/observable.rb', line 84

def remove_all_observers
  return if @observers.nil?
  @observers.each do |target, key_paths|
    key_paths.each_key do |key_path|
      target.removeObserver(self, forKeyPath:key_path)
    end
  end
  @observers.clear
end

#remove_observer(target, key_path) ⇒ Object 



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# File 'lib/motion-loco/observable.rb', line 78

def remove_observer(target, key_path)
  target.removeObserver(self, forKeyPath:key_path)
  observers = observers_for(target, key_path)
  observers[target].delete(key_path) if observers[target].has_key?(key_path)
end

#set_properties(properties_hash) ⇒ Object Also known as: setProperties

Change one or many properties from a hash of properties with values.

Parameters:

  • properties_hash (Hash) 


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# File 'lib/motion-loco/observable.rb', line 25

def set_properties(properties_hash)
  # Set the initial property values from the given hash
  properties_hash.each do |key, value|
    self.send("#{key}=", value)
  end
end

#update_attributes(properties_hash) ⇒ Object Also known as: updateAttributes

Change one or many properties from a hash of properties with values. Only updates attributes defined with #property.

Parameters:

  • properties_hash (Hash) 


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# File 'lib/motion-loco/observable.rb', line 36

def update_attributes(properties_hash)
  self.class.get_class_properties.each do |property|
    key = property[:name].to_sym
    if properties_hash.has_key? key
      self.setValue(properties_hash[key], forKey:key)
    end
  end
end