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Contents

require 'glimmer/dsl/expression'
require 'glimmer/swt/display_proxy'

module Glimmer
  module DSL
    module SWT
      class WidgetListenerExpression < Expression
        include_package 'org.eclipse.swt.widgets'
  
        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_')
          widget_or_display_parentage = parent.respond_to?(:swt_widget) || parent.is_a?(Glimmer::SWT::DisplayProxy)
          Glimmer::Config.logger.debug {"parent #{parent} is a widget or display: #{widget_or_display_parentage}"}
          return false unless widget_or_display_parentage
          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
  
        def interpret(parent, keyword, *args, &block)
          parent.handle_observation_request(keyword, &block)
        end
      end
    end
  end
end

Version data entries

17 entries across 17 versions & 1 rubygems

Version Path
glimmer-dsl-swt-0.6.9 lib/glimmer/dsl/swt/widget_listener_expression.rb
glimmer-dsl-swt-0.6.8 lib/glimmer/dsl/swt/widget_listener_expression.rb
glimmer-dsl-swt-0.6.7 lib/glimmer/dsl/swt/widget_listener_expression.rb
glimmer-dsl-swt-0.6.6 lib/glimmer/dsl/swt/widget_listener_expression.rb
glimmer-dsl-swt-0.6.5 lib/glimmer/dsl/swt/widget_listener_expression.rb
glimmer-dsl-swt-0.6.4 lib/glimmer/dsl/swt/widget_listener_expression.rb
glimmer-dsl-swt-0.6.3 lib/glimmer/dsl/swt/widget_listener_expression.rb
glimmer-dsl-swt-0.6.2 lib/glimmer/dsl/swt/widget_listener_expression.rb
glimmer-dsl-swt-0.6.1 lib/glimmer/dsl/swt/widget_listener_expression.rb
glimmer-dsl-swt-0.6.0 lib/glimmer/dsl/swt/widget_listener_expression.rb
glimmer-dsl-swt-0.5.6 lib/glimmer/dsl/swt/widget_listener_expression.rb
glimmer-dsl-swt-0.5.5 lib/glimmer/dsl/swt/widget_listener_expression.rb
glimmer-dsl-swt-0.5.4 lib/glimmer/dsl/swt/widget_listener_expression.rb
glimmer-dsl-swt-0.5.3 lib/glimmer/dsl/swt/widget_listener_expression.rb
glimmer-dsl-swt-0.5.2 lib/glimmer/dsl/swt/widget_listener_expression.rb
glimmer-dsl-swt-0.5.1 lib/glimmer/dsl/swt/widget_listener_expression.rb
glimmer-dsl-swt-0.5.0 lib/glimmer/dsl/swt/widget_listener_expression.rb