Class: ListSelectionDataBindingCommandHandler

Inherits:
Object
  • Object
show all
Includes:
CommandHandler, Glimmer
Defined in:
lib/command_handlers/list_selection_data_binding_command_handler.rb

Instance Method Summary collapse

Methods included from Glimmer

#add_contents, add_contents, #dsl, dsl, logger, method_missing, #method_missing

Dynamic Method Handling

This class handles dynamic methods through the method_missing method in the class Glimmer

Instance Method Details

#can_handle?(parent, command_symbol, *args, &block) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/command_handlers/list_selection_data_binding_command_handler.rb', line 11

def can_handle?(parent, command_symbol, *args, &block)
  parent.is_a?(RWidget) and
  parent.widget.is_a?(List) and
  command_symbol.to_s == "selection" and
  args.size == 1 and
  args[0].is_a?(ModelBinding) and
  args[0].evaluate_options_property.is_a?(Array) and
  block == nil
end

#do_handle(parent, command_symbol, *args, &block) ⇒ Object 



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# File 'lib/command_handlers/list_selection_data_binding_command_handler.rb', line 21

def do_handle(parent, command_symbol, *args, &block)
  model_binding = args[0]
  widget_binding = WidgetBinding.new(parent, "items")
  widget_binding.update(model_binding.evaluate_options_property)
  model = model_binding.base_model
  model.extend ObservableModel unless model.is_a?(ObservableModel)
  model.add_observer(model_binding.options_property_name, widget_binding)

  property_type = :string
  property_type = :array if parent.has_style?(:multi)
  list_selection_binding = ListSelectionBinding.new(parent, property_type)
  list_selection_binding.update(model_binding.evaluate_property)
  model.add_observer(model_binding.property_name_expression, list_selection_binding)

  add_contents(parent) {
    on_widget_selected {
      model_binding.update(list_selection_binding.evaluate_property)
    }
  }
end