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Contents
require 'glimmer/dsl/expression'
require 'glimmer/data_binding/model_binding'
require 'glimmer/data_binding/widget_binding'
module Glimmer
module DSL
module SWT
# Responsible for wiring two-way data-binding for text and selection properties
# on Text, Button, and Spinner widgets.
# Does so by using the output of the bind(model, property) command in the form
# of a ModelBinding, which is then connected to an anonymous widget observer
# (aka widget_data_binder as per widget_data_binders array)
#
# Depends on BindCommandHandler
class DataBindingExpression < Expression
def can_interpret?(parent, keyword, *args, &block)
args.size == 1 and
args[0].is_a?(DataBinding::ModelBinding)
end
def interpret(parent, keyword, *args, &block)
model_binding = args[0]
widget_binding_parameters = [parent, keyword]
widget_binding = DataBinding::WidgetBinding.new(*widget_binding_parameters)
widget_binding.call(model_binding.evaluate_property)
#TODO make this options observer dependent and all similar observers in widget specific data binding handlers
widget_binding.observe(model_binding)
# TODO simplify this logic and put it where it belongs
parent.add_observer(model_binding, keyword) if parent.respond_to?(:add_observer, [model_binding, keyword])
end
end
end
end
end
Version data entries
43 entries across 43 versions & 2 rubygems