lib/plugins/movelist/simple_movelist.rb

   1 require 'plugins/plugin'
   2
   3 class SimpleMoveList < Qt::ListView
   4   include Plugin
   5   include Observer
   6
   7   plugin :name => 'Simple Move List',
   8          :interface => :movelist
   9
  10   class LinearHistoryModel < Qt::StringListModel
  11     include Observer
  12     include Observable
  13
  14     def initialize(match)
  15       super([])
  16       @history = match.history
  17       @serializer = match.game.serializer.new(:compact)
  18
  19       @history.add_observer(self)
  20
  21       insert_rows(0, @history.size)
  22       (0...@history.size).each do |i|
  23         update_row(i)
  24       end
  25     end
  26
  27     def on_new_move
  28       if @history.size > rowCount
  29         insert_rows(rowCount, @history.size - rowCount)
  30       else
  31         remove_rows(@history.size, rowCount - @history.size)
  32       end
  33       update_row(@history.current)
  34       on_current_changed
  35     end
  36
  37     def on_current_changed
  38       fire :change_current => index(@history.current, 0)
  39     end
  40
  41     def move(i)
  42       if i == 0
  43         'Mainline'
  44       else
  45         state = @history[i - 1].state
  46         move = @history[i].move
  47         san = @serializer.serialize(move, state)
  48
  49         count = i / 2 + 1
  50         dots = if i % 2 == 0
  51           '.'
  52         else
  53           '...'
  54         end
  55
  56         "#{count}#{dots} #{san}"
  57       end
  58     end
  59
  60     def update_row(i)
  61       set_data(index(i, 0), move(i), Qt::DisplayRole)
  62     end
  63
  64     def flags(index)
  65       if index.isValid
  66         Qt::ItemIsSelectable | Qt::ItemIsEnabled
  67       else
  68         Qt::NoItemFlags
  69       end
  70     end
  71   end
  72
  73   def initialize(controller, opts = {})
  74     super(controller.table)
  75     @controller = controller
  76     self.font = opts[:font] if opts[:font]
  77
  78     @controller.table.add_observer(self)
  79   end
  80
  81   def on_reset(match)
  82     if match.game.respond_to?(:serializer)
  83       self.model = LinearHistoryModel.new(match)
  84       model.observe(:change_current) do |current|
  85         select(current)
  86       end
  87       sig = 'selectionChanged(QItemSelection, QItemSelection)'
  88       selection_model.on(sig) do |selected, deselected|
  89         @controller.go_to(selected.indexes.first.row)
  90       end
  91       # select last item
  92       select(model.index(model.row_count - 1, 0))
  93     else
  94       self.model = nil
  95     end
  96   end
  97
  98   def select(index)
  99     selection_model.select(index,
 100       Qt::ItemSelectionModel::ClearAndSelect)
 101     scroll_to(index)
 102   end
 103 end
 104