lib/plugins/movelist/simple_movelist.rb

   1 require 'plugins/plugin'
   2 require 'observer_utils'
   3
   4 class SimpleMoveList < Qt::ListView
   5   include Plugin
   6   include Observer
   7
   8   plugin :name => 'Simple Move List',
   9          :interface => :movelist
  10
  11   class LinearHistoryModel < Qt::StringListModel
  12     include Observer
  13     include Observable
  14
  15     def initialize(match)
  16       super([])
  17       @history = match.history
  18       @serializer = match.game.serializer.new(:compact)
  19
  20       @history.add_observer(self)
  21
  22       insert_rows(0, @history.size)
  23       (0...@history.size).each do |i|
  24         update_row(i)
  25       end
  26     end
  27
  28     def on_new_move
  29       if @history.size > rowCount
  30         insert_rows(rowCount, @history.size - rowCount)
  31       else
  32         remove_rows(@history.size, rowCount - @history.size)
  33       end
  34       update_row(@history.current)
  35       on_current_changed
  36     end
  37
  38     def on_current_changed
  39       fire :change_current => index(@history.current, 0)
  40     end
  41
  42     def move(i)
  43       if i == 0
  44         'Mainline'
  45       else
  46         state = @history[i - 1].state
  47         move = @history[i].move
  48         san = @serializer.serialize(move, state)
  49
  50         count = (i + 1) / 2
  51         dots = if i % 2 == 1
  52           '.'
  53         else
  54           '...'
  55         end
  56
  57         "#{count}#{dots} #{san}"
  58       end
  59     end
  60
  61     def update_row(i)
  62       set_data(index(i, 0), move(i), Qt::DisplayRole)
  63     end
  64
  65     def flags(index)
  66       if index.isValid
  67         Qt::ItemIsSelectable | Qt::ItemIsEnabled
  68       else
  69         Qt::NoItemFlags
  70       end
  71     end
  72   end
  73
  74   def initialize(controller, opts = {})
  75     super(controller.table)
  76     @controller = controller
  77     self.font = opts[:font] if opts[:font]
  78
  79     @controller.table.add_observer(self)
  80   end
  81
  82   def on_reset(match)
  83     if match.game.respond_to?(:serializer)
  84       self.model = LinearHistoryModel.new(match)
  85       model.observe(:change_current) do |current|
  86         select(current)
  87       end
  88       sig = 'selectionChanged(QItemSelection, QItemSelection)'
  89       selection_model.on(sig) do |selected, deselected|
  90         match.history.go_to(selected.indexes.first.row)
  91       end
  92       # select last item
  93       select(model.index(model.row_count - 1, 0))
  94     else
  95       self.model = nil
  96     end
  97   end
  98
  99   def select(index)
 100     selection_model.select(index,
 101       Qt::ItemSelectionModel::ClearAndSelect)
 102     scroll_to(index)
 103   end
 104 end
 105