Class: Glimmer::DSL::Opal::CheckboxGroupSelectionDataBindingExpression

Inherits:
Expression
  • Object
show all
Defined in:
lib/glimmer/dsl/opal/checkbox_group_selection_data_binding_expression.rb

Instance Method Summary collapse

Instance Method Details

#can_interpret?(parent, keyword, *args, &block) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/glimmer/dsl/opal/checkbox_group_selection_data_binding_expression.rb', line 31

def can_interpret?(parent, keyword, *args, &block)
  keyword == 'selection' and
    block.nil? and
    (parent.is_a?(Glimmer::SWT::Custom::CheckboxGroup) or (parent.is_a?(Glimmer::UI::CustomWidget) and parent.body_root.is_a?(Glimmer::SWT::Custom::CheckboxGroup)) ) and
    args.size == 1 and
    args[0].is_a?(DataBinding::ModelBinding) and
    args[0].evaluate_options_property.is_a?(Array)
end

#interpret(parent, keyword, *args, &block) ⇒ Object 



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# File 'lib/glimmer/dsl/opal/checkbox_group_selection_data_binding_expression.rb', line 40

def interpret(parent, keyword, *args, &block)
  model_binding = args[0]
  
  #TODO make this options observer dependent and all similar observers in widget specific data binding handlers
  # TODO consider delegating some of this work
  widget_binding = DataBinding::ElementBinding.new(parent, 'items')
  widget_binding.call(model_binding.evaluate_options_property)
  model = model_binding.base_model
  widget_binding.observe(model, model_binding.options_property_name)
  
  widget_binding = DataBinding::ElementBinding.new(parent, 'selection')
  widget_binding.call(model_binding.evaluate_property)
  widget_binding.observe(model, model_binding.property_name_expression)
  
  parent.on_widget_selected do
    model_binding.call(widget_binding.evaluate_property)
  end
end