multi_state_selection_box.rb

# * [ok] Allow to select more than one item.
# * [ok] Multi state: no selected, selected, auto selected.
# * [ok] Enable/disable items.
# * [ok] Event over item title.
# * [ok] Automatic text wrapping.
# * [No] Auto-focus to the selected item.
# * [No] Event when moving with arrow up/down.

class MultiStateSelectionBox < CWM::RichText
  def item(id)
    items.find { |i| i.id == id }
  end

  def handle(event)
    if event == over_checkbox_link
      item = item(even.item_id)
      toggle(item)
    end

    refresh

    event
  end

  def refresh
    # update html content based on items
  end

  def toggle(item)
    item.toggle
  end

  def value
    self.items
  end

  # @param v [Array<Item>]
  def value=(v)
    self.items = v
  end

  def content
    # html based on items
  end

  class Item
    abstract_method :id, :label, :status

    module Status
      SELECTED = :selected
      UNSELECTED = :unselected
      AUTO_SELECTED = :auto_selected
    end

    def toggle
      selected? ? Status::UNSELECTED : Status::SELECTED
    end

    def selected?
      status == Status::SELECTED
    end

    # rest of logic to generate the html for the item, etc
  end

  private

  # @return [Array<Item>]
  abstract_method :items
end


# In the dialog from yast-registration:

class AddonsSelector < CWM::MultiStateSelectionBox
  def content
    VBox(filter_widget, super, description_widget)
  end

  def filter_widget
    @filter_widget ||= ...
  end

  def description_widget
    @description_widget ||= DescriptionWidget.new
  end

  def handle(event)
    case event
    when over_name_link
      item = item(event.id)
      description_widget.value = item.description
    when filter
      self.value = calculate_items
    end

    super
  end

  private

  def items
    @items ||= Addons.find_all.each { |a| Item.new(a) }
  end

  def toggle(item)
    item.toggle

    calculate_dependencies
  end

  class Item < CWM::MultiStateSelectionBox::Item
    def initialize(addon)
      @addon = addon
    end

    def status
      return Status::AUTO_SELECTED if @addon.auto_selected?

      @addon.selected? ? Status::SELECTED : Status::UNSELECTED
    end
  end
end


# In the dialog from yast-packager

class ProductSelector < CWM::MultiStateSelectionBox
  def content
    VBox(super, description_widget)
  end

  def description_widget
    @description_widget ||= DescriptionWidget.new
  end

  def handle(event)
    if event == over_name_link
      item = item(event.id)
      description_widget.value = item.description
    end

    super
  end

  private

  def items
    @items ||= Finder.find ...
  end

  def toggle(item)
    item.toggle

    calculate_dependencies
  end

  class Item < CWM::MultiStateSelectionBox::Item
    def initialize(product)
      @product = product
    end

    def status

    end
  end
end