Class: Glimmer::DataBinding::TableItemsBinding

Inherits:
Object
  • Object
show all
Includes:
DataBinding::Observable, DataBinding::Observer
Defined in:
lib/glimmer/data_binding/table_items_binding.rb

Instance Method Summary collapse

Constructor Details

#initialize(parent, model_binding, column_properties) ⇒ TableItemsBinding

Returns a new instance of TableItemsBinding.



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# File 'lib/glimmer/data_binding/table_items_binding.rb', line 36

def initialize(parent, model_binding, column_properties)
  @table = parent
  @model_binding = model_binding
  @table.swt_widget.data = @model_binding
  @column_properties = column_properties
  if @table.respond_to?(:column_properties=)
    @table.column_properties = @column_properties
  else # assume custom widget
    @table.body_root.column_properties = @column_properties
  end
  call(@model_binding.evaluate_property)
  @table_observer_registration = observe(model_binding)
  @table.on_widget_disposed do |dispose_event|
    unregister_all_observables
  end
end

Instance Method Details

#call(new_model_collection = nil) ⇒ Object 



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# File 'lib/glimmer/data_binding/table_items_binding.rb', line 53

def call(new_model_collection=nil)
  new_model_collection = @model_binding.evaluate_property # this ensures applying converters (e.g. :on_read)
  table_cells = @table.swt_widget.items.map {|item| @table.column_properties.size.times.map {|i| item.get_text(i)} }
  model_cells = new_model_collection.to_a.map {|m| @table.cells_for(m)}
  return if table_cells == model_cells
  if new_model_collection and new_model_collection.is_a?(Array)
    @table_items_observer_registration&.unobserve
    @table_items_observer_registration = observe(new_model_collection, @column_properties)
    add_dependent(@table_observer_registration => @table_items_observer_registration)
    @model_collection = new_model_collection
  end
  populate_table(@model_collection, @table, @column_properties)        
end

#populate_table(model_collection, parent, column_properties) ⇒ Object 



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# File 'lib/glimmer/data_binding/table_items_binding.rb', line 67

def populate_table(model_collection, parent, column_properties)
  selected_table_item_models = parent.swt_widget.getSelection.map(&:getData)
  parent.finish_edit!
  parent.swt_widget.items.each(&:dispose)
  parent.swt_widget.removeAll
  model_collection.each do |model|
    table_item = TableItem.new(parent.swt_widget, SWT::SWTProxy[:none])
    for index in 0..(column_properties.size-1)
      table_item.setText(index, model.send(column_properties[index]).to_s)
    end
    table_item.setData(model)
  end
  selected_table_items = parent.search {|item| selected_table_item_models.include?(item.getData) }
  selected_table_items = [parent.swt_widget.getItems.first].to_java(TableItem) if selected_table_items.empty? && !parent.swt_widget.getItems.empty?
  parent.swt_widget.setSelection(selected_table_items) unless selected_table_items.empty?
  parent.sort
  parent.swt_widget.redraw if parent&.swt_widget&.respond_to?(:redraw)
end