Class: TreeItemsBinding

Inherits:
Object
  • Object
show all
Includes:
Observer
Defined in:
lib/command_handlers/models/tree_items_binding.rb

Instance Method Summary collapse

Constructor Details

#initialize(parent, model_binding, tree_properties) ⇒ TreeItemsBinding

Returns a new instance of TreeItemsBinding.



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# File 'lib/command_handlers/models/tree_items_binding.rb', line 10

def initialize(parent, model_binding, tree_properties)
  @tree = parent
  @model_binding = model_binding
  @tree_properties = [tree_properties].flatten.first.to_h
  update(@model_binding.evaluate_property)
  model = model_binding.base_model
  model.extend(ObservableModel) unless model.is_a?(ObservableModel)
  model.add_observer(model_binding.property_name_expression, self)
end

Instance Method Details

#populate_tree(model_tree_root_node, parent, tree_properties) ⇒ Object 



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# File 'lib/command_handlers/models/tree_items_binding.rb', line 28

def populate_tree(model_tree_root_node, parent, tree_properties)
  parent.widget.removeAll
  populate_tree_node(model_tree_root_node, parent.widget, tree_properties)
end

#populate_tree_node(model_tree_node, parent, tree_properties) ⇒ Object 



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# File 'lib/command_handlers/models/tree_items_binding.rb', line 32

def populate_tree_node(model_tree_node, parent, tree_properties)
  table_item = TreeItem.new(parent, SWT::NONE)
  table_item.setText((model_tree_node && model_tree_node.send(tree_properties[:text])).to_s)
    [model_tree_node && model_tree_node.send(tree_properties[:children])].flatten.to_a.compact.each do |child|
    child.extend(ObservableModel) unless child.is_a?(ObservableModel)
    child.add_observer(@tree_properties[:text], self)
    populate_tree_node(child, table_item, tree_properties)
  end
end

#update(model_tree_root_node = nil) ⇒ Object 



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# File 'lib/command_handlers/models/tree_items_binding.rb', line 19

def update(model_tree_root_node=nil)
  if model_tree_root_node and model_tree_root_node.respond_to?(@tree_properties[:children])
    model_tree_root_node.extend(ObservableModel) unless model_tree_root_node.is_a?(ObservableModel)
    model_tree_root_node.add_observer(@tree_properties[:text], self)
    model_tree_root_node.add_observer(@tree_properties[:children], self)
    @model_tree_root_node = model_tree_root_node
  end
  populate_tree(@model_tree_root_node, @tree, @tree_properties)
end