lib/plugins/movelist/simple_movelist.rb

   1 # Copyright (c) 2009 Paolo Capriotti <p.capriotti@gmail.com>
   2 #
   3 # This program is free software; you can redistribute it and/or modify
   4 # it under the terms of the GNU General Public License as published by
   5 # the Free Software Foundation; either version 2 of the License, or
   6 # (at your option) any later version.
   7
   8 require 'qtutils'
   9 require 'plugins/plugin'
  10 require 'observer_utils'
  11
  12 class SimpleMoveList < Qt::ListView
  13   include Plugin
  14   include Observer
  15
  16   plugin :name => 'Simple Move List',
  17          :interface => :movelist
  18
  19   class LinearHistoryModel < Qt::StringListModel
  20     include Observer
  21     include Observable
  22
  23     def initialize(match)
  24       super([])
  25       @history = match.history
  26       @serializer = match.game.serializer.new(:compact)
  27
  28       @history.add_observer(self)
  29
  30       insert_rows(0, @history.size)
  31       (0...@history.size).each do |i|
  32         update_row(i)
  33       end
  34     end
  35
  36     def on_new_move
  37       if @history.size > rowCount
  38         insert_rows(rowCount, @history.size - rowCount)
  39       else
  40         remove_rows(@history.size, rowCount - @history.size)
  41       end
  42       update_row(@history.current)
  43       on_current_changed
  44     end
  45
  46     def on_current_changed
  47       fire :change_current => index(@history.current, 0)
  48     end
  49
  50     def move(i)
  51       if i == 0
  52         'Mainline'
  53       else
  54         state = @history[i - 1].state
  55         move = @history[i].move
  56         san = @serializer.serialize(move, state)
  57
  58         count = (i + 1) / 2
  59         dots = if i % 2 == 1
  60           '.'
  61         else
  62           '...'
  63         end
  64
  65         "#{count}#{dots} #{san}"
  66       end
  67     end
  68
  69     def update_row(i)
  70       set_data(index(i, 0), move(i), Qt::DisplayRole)
  71     end
  72
  73     def flags(index)
  74       if index.isValid
  75         Qt::ItemIsSelectable | Qt::ItemIsEnabled
  76       else
  77         Qt::NoItemFlags
  78       end
  79     end
  80   end
  81
  82   def initialize(controller, opts = {})
  83     super(controller.table)
  84     @controller = controller
  85     self.font = opts[:font] if opts[:font]
  86
  87     @controller.table.add_observer(self)
  88   end
  89
  90   def on_reset(match)
  91     if match.game.respond_to?(:serializer)
  92       self.model = LinearHistoryModel.new(match)
  93       model.observe(:change_current) do |current|
  94         select(current)
  95       end
  96       sig = 'selectionChanged(QItemSelection, QItemSelection)'
  97       selection_model.on(sig) do |selected, deselected|
  98         match.history.go_to(selected.indexes.first.row)
  99       end
 100       # select last item
 101       select(model.index(model.row_count - 1, 0))
 102     else
 103       self.model = nil
 104     end
 105   end
 106
 107   def select(index)
 108     selection_model.select(index,
 109       Qt::ItemSelectionModel::ClearAndSelect)
 110     scroll_to(index)
 111   end
 112 end
 113