Module: Glimmer::DataBinding::ObservableModel

Includes:
Observable
Included in:
UI::CustomWidget
Defined in:
lib/glimmer/data_binding/ext/observable_model.rb

Overview

TODO prefix utility methods with double-underscore

Instance Method Summary collapse

Instance Method Details

#add_property_writer_observers(property_name) ⇒ Object

include Glimmer



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# File 'lib/glimmer/data_binding/ext/observable_model.rb', line 14

def add_property_writer_observers(property_name)
  property_writer_name = "#{property_name}="
  method(property_writer_name)
  ensure_array_object_observer(property_name, send(property_name))
  begin
    method("__original_#{property_writer_name}")
  rescue
    old_method = self.class.instance_method(property_writer_name)
    define_singleton_method("__original_#{property_writer_name}", old_method)
    define_singleton_method(property_writer_name) do |value|
      old_value = self.send(property_name)
      unregister_dependent_observers(property_name, old_value)
      self.send("__original_#{property_writer_name}", value)
#             Glimmer::Opal::DisplayProxy.instance.async_exec do
      notify_observers(property_name)
      ensure_array_object_observer(property_name, value, old_value)
#             end
    end
  end
rescue => e
  # ignore writing if no property writer exists
  Glimmer::Config.logger&.debug "No need to observe property writer: #{property_writer_name}\n#{e.message}\n#{e.backtrace.join("\n")}"
end