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