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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 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
13 entries across 13 versions & 1 rubygems