class Glimmer::DSL::Swing::ListenerExpression

Widget, Shape, and Display listener experssion

Public Instance Methods

can_interpret?(parent, keyword, *args, &block) click to toggle source
# File lib/glimmer/dsl/swing/listener_expression.rb, line 29
def can_interpret?(parent, keyword, *args, &block)
  Glimmer::Config.logger.debug {"keyword starts with on_: #{keyword.start_with?('on_')}"}
  return false unless keyword.start_with?('on_')
  proper_parent = parent.respond_to?(:original)
  Glimmer::Config.logger.debug {"parent #{parent} is a widget, shape, or display: #{proper_parent}"}
  return false unless proper_parent
  Glimmer::Config.logger.debug {"block exists?: #{!block.nil?}"}
  raise Glimmer::Error, "Listener is missing block for keyword: #{keyword}" unless block_given?
  Glimmer::Config.logger.debug {"args are empty?: #{args.empty?}"}
  raise Glimmer::Error, "Invalid listener arguments for keyword: #{keyword}(#{args})" unless args.empty?
  result = parent.can_handle_observation_request?(keyword)
  Glimmer::Config.logger.debug {"can add listener? #{result}"}
  raise Glimmer::Error, "Invalid listener keyword: #{keyword}" unless result
  true
end
interpret(parent, keyword, *args, &block) click to toggle source
# File lib/glimmer/dsl/swing/listener_expression.rb, line 45
def interpret(parent, keyword, *args, &block)
  parent.handle_observation_request(keyword, &block)
end