#
#		tk.rb - Tk interface module using tcltklib
#			$Date$
#			by Yukihiro Matsumoto <matz@netlab.jp>

# use Shigehiro's tcltklib
require 'tcltklib'
require 'tkutil'

# autoload
require 'tk/autoload'

class TclTkIp
  # backup original (without encoding) _eval and _invoke
  alias _eval_without_enc _eval
  alias _invoke_without_enc _invoke
end

# define TkComm module (step 1: basic functions)
module TkComm
  include TkUtil
  extend TkUtil

  WidgetClassNames = {}.taint

  # None = Object.new  ### --> definition is moved to TkUtil module
  # def None.to_s
  #   'None'
  # end
  # None.freeze

  #Tk_CMDTBL = {}
  #Tk_WINDOWS = {}
  Tk_IDs = ["00000".taint, "00000".taint].freeze  # [0]-cmdid, [1]-winid

  # for backward compatibility
  Tk_CMDTBL = Object.new
  def Tk_CMDTBL.method_missing(id, *args)
    TkCore::INTERP.tk_cmd_tbl.send(id, *args)
  end
  Tk_CMDTBL.freeze
  Tk_WINDOWS = Object.new
  def Tk_WINDOWS.method_missing(id, *args)
    TkCore::INTERP.tk_windows.send(id, *args)
  end
  Tk_WINDOWS.freeze

  self.instance_eval{
    @cmdtbl = [].taint
  }

  unless const_defined?(:GET_CONFIGINFO_AS_ARRAY)
    # GET_CONFIGINFO_AS_ARRAY = false => returns a Hash { opt =>val, ... }
    #                           true  => returns an Array [[opt,val], ... ]
    # val is a list which includes resource info. 
    GET_CONFIGINFO_AS_ARRAY = true
  end
  unless const_defined?(:GET_CONFIGINFOwoRES_AS_ARRAY)
    # for configinfo without resource info; list of [opt, value] pair
    #           false => returns a Hash { opt=>val, ... }
    #           true  => returns an Array [[opt,val], ... ]
    GET_CONFIGINFOwoRES_AS_ARRAY = true
  end
  #  *** ATTENTION ***
  # 'current_configinfo' method always returns a Hash under all cases of above.

  def error_at
    frames = caller()
    frames.delete_if do |c|
      c =~ %r!/tk(|core|thcore|canvas|text|entry|scrollbox)\.rb:\d+!
    end
    frames
  end
  private :error_at

  def _genobj_for_tkwidget(path)
    return TkRoot.new if path == '.'

    begin
      #tk_class = TkCore::INTERP._invoke('winfo', 'class', path)
      tk_class = Tk.ip_invoke_without_enc('winfo', 'class', path)
    rescue
      return path
    end

    if ruby_class = WidgetClassNames[tk_class]
      ruby_class_name = ruby_class.name
      # gen_class_name = ruby_class_name + 'GeneratedOnTk'
      gen_class_name = ruby_class_name
      classname_def = ''
    elsif Object.const_defined?('Tk' + tk_class)
      ruby_class_name = 'Tk' + tk_class
      # gen_class_name = ruby_class_name + 'GeneratedOnTk'
      gen_class_name = ruby_class_name
      classname_def = ''
    else
      ruby_class_name = 'TkWindow'
      # gen_class_name = ruby_class_name + tk_class + 'GeneratedOnTk'
      gen_class_name = 'TkWidget_' + tk_class
      classname_def = "WidgetClassName = '#{tk_class}'.freeze"
    end
    unless Object.const_defined? gen_class_name
      Object.class_eval "class #{gen_class_name}<#{ruby_class_name}
                           #{classname_def}
                         end"
    end
    Object.class_eval "#{gen_class_name}.new('widgetname'=>'#{path}', 
                                             'without_creating'=>true)"
  end
  private :_genobj_for_tkwidget
  module_function :_genobj_for_tkwidget

  def tk_tcl2ruby(val, enc_mode = nil)
    if val =~ /^rb_out (c\d+)/
      #return Tk_CMDTBL[$1]
      return TkCore::INTERP.tk_cmd_tbl[$1]
      #cmd_obj = TkCore::INTERP.tk_cmd_tbl[$1]
      #if cmd_obj.kind_of?(Proc) || cmd_obj.kind_of?(Method)
      #  cmd_obj
      #else
      #  cmd_obj.cmd
      #end
    end
    #if val.include? ?\s
    #  return val.split.collect{|v| tk_tcl2ruby(v)}
    #end
    case val
    when /^@font/
      TkFont.get_obj(val)
    when /^-?\d+$/
      val.to_i
    when /^\./
      #Tk_WINDOWS[val] ? Tk_WINDOWS[val] : _genobj_for_tkwidget(val)
      TkCore::INTERP.tk_windows[val]? 
           TkCore::INTERP.tk_windows[val] : _genobj_for_tkwidget(val)
    when /^i\d+$/
      TkImage::Tk_IMGTBL[val]? TkImage::Tk_IMGTBL[val] : val
    when /^-?\d+\.?\d*(e[-+]?\d+)?$/
      val.to_f
    when /[^\\] /
      tk_split_escstr(val).collect{|elt|
        tk_tcl2ruby(elt)
      }
    when /\\ /
      val.gsub(/\\ /, ' ')
    else
      if enc_mode
	_fromUTF8(val)
      else
	val
      end
    end
  end

  private :tk_tcl2ruby

unless const_defined?(:USE_TCLs_LIST_FUNCTIONS)
  USE_TCLs_LIST_FUNCTIONS = true
end

if USE_TCLs_LIST_FUNCTIONS
  ###########################################################################
  # use Tcl function version of split_list
  ###########################################################################

  def tk_split_escstr(str)
    TkCore::INTERP._split_tklist(str)
  end

  def tk_split_sublist(str)
    return [] if str == ""
    list = TkCore::INTERP._split_tklist(str)
    if list.size == 1
      tk_tcl2ruby(list[0])
    else
      list.collect{|token| tk_split_sublist(token)}
    end
  end

  def tk_split_list(str)
    return [] if str == ""
    TkCore::INTERP._split_tklist(str).collect{|token| tk_split_sublist(token)}
  end

  def tk_split_simplelist(str)
    #lst = TkCore::INTERP._split_tklist(str)
    #if (lst.size == 1 && lst =~ /^\{.*\}$/)
    #  TkCore::INTERP._split_tklist(str[1..-2])
    #else
    #  lst
    #end
    TkCore::INTERP._split_tklist(str)
  end

  def array2tk_list(ary)
    return "" if ary.size == 0

    dst = ary.collect{|e|
      if e.kind_of? Array
	array2tk_list(e)
      elsif e.kind_of? Hash
	tmp_ary = []
	e.each{|k,v| tmp_ary << k << v }
	array2tk_list(tmp_ary)
      else
	_get_eval_string(e)
      end
    }
    TkCore::INTERP._merge_tklist(*dst)
  end

else
  ###########################################################################
  # use Ruby script version of split_list (traditional methods)
  ###########################################################################

  def tk_split_escstr(str)
    return [] if str == ""
    list = []
    token = nil
    escape = false
    brace = 0
    str.split('').each {|c|
      brace += 1 if c == '{' && !escape
      brace -= 1 if c == '}' && !escape
      if brace == 0 && c == ' ' && !escape
        list << token.gsub(/^\{(.*)\}$/, '\1') if token
        token = nil
      else
        token = (token || "") << c
      end
      escape = (c == '\\' && !escape)
    }
    list << token.gsub(/^\{(.*)\}$/, '\1') if token
    list
  end

  def tk_split_sublist(str)
    return [] if str == ""
    return [tk_split_sublist(str[1..-2])] if str =~ /^\{.*\}$/
    list = tk_split_escstr(str)
    if list.size == 1
      tk_tcl2ruby(list[0])
    else
      list.collect{|token| tk_split_sublist(token)}
    end
  end

  def tk_split_list(str)
    return [] if str == ""
    tk_split_escstr(str).collect{|token| tk_split_sublist(token)}
  end
=begin
  def tk_split_list(str)
    return [] if str == ""
    idx = str.index('{')
    while idx and idx > 0 and str[idx-1] == ?\\
      idx = str.index('{', idx+1)
    end
    unless idx
      list = tk_tcl2ruby(str)
      unless Array === list
        list = [list]
      end
      return list
    end

    list = tk_tcl2ruby(str[0,idx])
    list = [] if list == ""
    str = str[idx+1..-1]
    i = -1
    escape = false
    brace = 1
    str.each_byte {|c|
      i += 1
      brace += 1 if c == ?{ && !escape
      brace -= 1 if c == ?} && !escape
      escape = (c == ?\\)
      break if brace == 0
    }
    if str.size == i + 1
      return tk_split_list(str[0, i])
    end
    if str[0, i] == ' '
      list.push ' '
    else
      list.push tk_split_list(str[0, i])
    end
    list += tk_split_list(str[i+1..-1])
    list
  end
=end

  def tk_split_simplelist(str)
    return [] if str == ""
    list = []
    token = nil
    escape = false
    brace = 0
    str.split('').each {|c|
      if c == '\\' && !escape
        escape = true
        token = (token || "") << c if brace > 0
	next
      end
      brace += 1 if c == '{' && !escape
      brace -= 1 if c == '}' && !escape
      if brace == 0 && c == ' ' && !escape
        list << token.gsub(/^\{(.*)\}$/, '\1') if token
        token = nil
      else
        token = (token || "") << c
      end
      escape = false
    }
    list << token.gsub(/^\{(.*)\}$/, '\1') if token
    list
  end

  def array2tk_list(ary)
    ary.collect{|e|
      if e.kind_of? Array
	"{#{array2tk_list(e)}}"
      elsif e.kind_of? Hash
	"{#{e.to_a.collect{|ee| array2tk_list(ee)}.join(' ')}}"
      else
	s = _get_eval_string(e)
	(s.index(/\s/) || s.size == 0)? "{#{s}}": s
      end
    }.join(" ")
  end
end

  private :tk_split_escstr, :tk_split_sublist
  private :tk_split_list, :tk_split_simplelist
  private :array2tk_list

  module_function :tk_split_escstr, :tk_split_sublist
  module_function :tk_split_list, :tk_split_simplelist
  module_function :array2tk_list

  private_class_method :tk_split_escstr, :tk_split_sublist
  private_class_method :tk_split_list, :tk_split_simplelist
  private_class_method :array2tk_list

=begin
  ### --> definition is moved to TkUtil module
  def _symbolkey2str(keys)
    h = {}
    keys.each{|key,value| h[key.to_s] = value}
    h
  end
  private :_symbolkey2str
  module_function :_symbolkey2str
=end

=begin
  ### --> definition is moved to TkUtil module
  # def hash_kv(keys, enc_mode = nil, conf = [], flat = false)
  def hash_kv(keys, enc_mode = nil, conf = nil)
    # Hash {key=>val, key=>val, ... } or Array [ [key, val], [key, val], ... ]
    #     ==> Array ['-key', val, '-key', val, ... ]
    dst = []
    if keys and keys != None
      keys.each{|k, v|
	#dst.push("-#{k}")
	dst.push('-' + k.to_s)
	if v != None
	  # v = _get_eval_string(v, enc_mode) if (enc_mode || flat)
	  v = _get_eval_string(v, enc_mode) if enc_mode
	  dst.push(v)
	end
      }
    end
    if conf
      conf + dst
    else
      dst
    end
  end
  private :hash_kv
  module_function :hash_kv
=end

=begin
  ### --> definition is moved to TkUtil module
  def bool(val)
    case val
    when "1", 1, 'yes', 'true'
      true
    else
      false
    end
  end

  def number(val)
    case val
    when /^-?\d+$/
      val.to_i
    when /^-?\d+\.?\d*(e[-+]?\d+)?$/
      val.to_f
    else
      fail(ArgumentError, "invalid value for Number:'#{val}'")
    end
  end
  def string(val)
    if val == "{}"
      ''
    elsif val[0] == ?{ && val[-1] == ?}
      val[1..-2]
    else
      val
    end
  end
  def num_or_str(val)
    begin
      number(val)
    rescue ArgumentError
      string(val)
    end
  end
=end

  def list(val)
    tk_split_list(val)
  end
  def simplelist(val)
    tk_split_simplelist(val)
  end
  def window(val)
    if val =~ /^\./
      #Tk_WINDOWS[val]? Tk_WINDOWS[val] : _genobj_for_tkwidget(val)
      TkCore::INTERP.tk_windows[val]? 
           TkCore::INTERP.tk_windows[val] : _genobj_for_tkwidget(val)
    else
      nil
    end
  end
  def image_obj(val)
    if val =~ /^i\d+$/
      TkImage::Tk_IMGTBL[val]? TkImage::Tk_IMGTBL[val] : val
    else
      val
    end
  end
  def procedure(val)
    if val =~ /^rb_out (c\d+)/
      #Tk_CMDTBL[$1]
      #TkCore::INTERP.tk_cmd_tbl[$1]
      TkCore::INTERP.tk_cmd_tbl[$1].cmd
    else
      #nil
      val
    end
  end
  private :bool, :number, :string, :list, :simplelist, :window, :procedure
  module_function :bool, :number, :num_or_str, :string, :list, :simplelist
  module_function :window, :image_obj, :procedure

  def _toUTF8(str, encoding = nil)
    TkCore::INTERP._toUTF8(str, encoding)
  end
  def _fromUTF8(str, encoding = nil)
    TkCore::INTERP._fromUTF8(str, encoding)
  end
  private :_toUTF8, :_fromUTF8
  module_function :_toUTF8, :_fromUTF8

=begin
  ### --> definition is moved to TkUtil module
  def _get_eval_string(str, enc_mode = nil)
    return nil if str == None
    if str.kind_of?(TkObject)
      str = str.path
    elsif str.kind_of?(String)
      str = _toUTF8(str) if enc_mode
    elsif str.kind_of?(Symbol)
      str = str.id2name
      str = _toUTF8(str) if enc_mode
    elsif str.kind_of?(Hash)
      str = hash_kv(str, enc_mode).join(" ")
    elsif str.kind_of?(Array)
      str = array2tk_list(str)
      str = _toUTF8(str) if enc_mode
    elsif str.kind_of?(Proc)
      str = install_cmd(str)
    elsif str == nil
      str = ""
    elsif str == false
      str = "0"
    elsif str == true
      str = "1"
    elsif (str.respond_to?(:to_eval))
      str = str.to_eval()
      str = _toUTF8(str) if enc_mode
    else
      str = str.to_s() || ''
      unless str.kind_of? String
	fail RuntimeError, "fail to convert the object to a string" 
      end
      str = _toUTF8(str) if enc_mode
    end
    return str
  end
=end
=begin
  def _get_eval_string(obj, enc_mode = nil)
    case obj
    when Numeric
      obj.to_s
    when String
      (enc_mode)? _toUTF8(obj): obj
    when Symbol
      (enc_mode)? _toUTF8(obj.id2name): obj.id2name
    when TkObject
      obj.path
    when Hash
      hash_kv(obj, enc_mode).join(' ')
    when Array
      (enc_mode)? _toUTF8(array2tk_list(obj)): array2tk_list(obj)
    when Proc, Method, TkCallbackEntry
      install_cmd(obj)
    when false
      '0'
    when true
      '1'
    when nil
      ''
    when None
      nil
    else
      if (obj.respond_to?(:to_eval))
	(enc_mode)? _toUTF8(obj.to_eval): obj.to_eval
      else
	begin
	  obj = obj.to_s || ''
	rescue
	  fail RuntimeError, "fail to convert object '#{obj}' to string" 
	end
	(enc_mode)? _toUTF8(obj): obj
      end
    end
  end
  private :_get_eval_string
  module_function :_get_eval_string
=end

=begin
  ### --> definition is moved to TkUtil module
  def _get_eval_enc_str(obj)
    return obj if obj == None
    _get_eval_string(obj, true)
  end
  private :_get_eval_enc_str
  module_function :_get_eval_enc_str
=end

=begin
  ### --> obsolete
  def ruby2tcl(v, enc_mode = nil)
    if v.kind_of?(Hash)
      v = hash_kv(v)
      v.flatten!
      v.collect{|e|ruby2tcl(e, enc_mode)}
    else
      _get_eval_string(v, enc_mode)
    end
  end
  private :ruby2tcl
=end

=begin
  ### --> definition is moved to TkUtil module
  def _conv_args(args, enc_mode, *src_args)
    conv_args = []
    src_args.each{|arg|
      conv_args << _get_eval_string(arg, enc_mode) unless arg == None
      # if arg.kind_of?(Hash)
      # arg.each{|k, v|
      #   args << '-' + k.to_s
      #   args << _get_eval_string(v, enc_mode)
      # }
      # elsif arg != None
      #   args << _get_eval_string(arg, enc_mode)
      # end
    }
    args + conv_args
  end
  private :_conv_args
=end

  def _curr_cmd_id
    #id = format("c%.4d", Tk_IDs[0])
    id = "c" + TkComm::Tk_IDs[0]
  end
  def _next_cmd_id
    id = _curr_cmd_id
    #Tk_IDs[0] += 1
    TkComm::Tk_IDs[0].succ!
    id
  end
  private :_curr_cmd_id, :_next_cmd_id
  module_function :_curr_cmd_id, :_next_cmd_id

  def install_cmd(cmd)
    return '' if cmd == ''
    id = _next_cmd_id
    #Tk_CMDTBL[id] = cmd
    if cmd.kind_of?(TkCallbackEntry)
      TkCore::INTERP.tk_cmd_tbl[id] = cmd
    else
      TkCore::INTERP.tk_cmd_tbl[id] = TkCore::INTERP.get_cb_entry(cmd)
    end
    @cmdtbl = [] unless defined? @cmdtbl
    @cmdtbl.taint unless @cmdtbl.tainted?
    @cmdtbl.push id
    #return Kernel.format("rb_out %s", id);
    return 'rb_out ' + id
  end
  def uninstall_cmd(id)
    id = $1 if /rb_out (c\d+)/ =~ id
    #Tk_CMDTBL.delete(id)
    TkCore::INTERP.tk_cmd_tbl.delete(id)
  end
  # private :install_cmd, :uninstall_cmd
  module_function :install_cmd, :uninstall_cmd

=begin
  def install_win(ppath,name=nil)
    if !name or name == ''
      #name = format("w%.4d", Tk_IDs[1])
      #Tk_IDs[1] += 1
      name = "w" + Tk_IDs[1]
      Tk_IDs[1].succ!
    end
    if name[0] == ?.
      @path = name.dup
    elsif !ppath or ppath == "."
      @path = Kernel.format(".%s", name);
    else
      @path = Kernel.format("%s.%s", ppath, name)
    end
    #Tk_WINDOWS[@path] = self
    TkCore::INTERP.tk_windows[@path] = self
  end
=end
  def install_win(ppath,name=nil)
    if name
      if name == ''
	raise ArgumentError, "invalid wiget-name '#{name}'"
      end
      if name[0] == ?.
	@path = '' + name
	@path.freeze
	return TkCore::INTERP.tk_windows[@path] = self
      end
    else
      name = "w" + Tk_IDs[1]
      Tk_IDs[1].succ!
    end
    if !ppath or ppath == '.'
      @path = '.' + name
    else
      @path = ppath + '.' + name
    end
    @path.freeze
    TkCore::INTERP.tk_windows[@path] = self
  end

  def uninstall_win()
    #Tk_WINDOWS.delete(@path)
    TkCore::INTERP.tk_windows.delete(@path)
  end
  private :install_win, :uninstall_win

  def _epath(win)
    if win.kind_of?(TkObject)
      win.epath
    elsif win.respond_to?(:epath)
      win.epath
    else
      win
    end
  end
  private :_epath
end

# define TkComm module (step 2: event binding)
module TkComm
  include TkEvent
  extend TkEvent

  def tk_event_sequence(context)
    if context.kind_of? TkVirtualEvent
      context = context.path
    end
    if context.kind_of? Array
      context = context.collect{|ev|
	if ev.kind_of? TkVirtualEvent
	  ev.path
	else
	  ev
	end
      }.join("><")
    end
    if /,/ =~ context
      context = context.split(/\s*,\s*/).join("><")
    else
      context
    end
  end

  def _bind_core(mode, what, context, cmd, args=nil)
    id = install_bind(cmd, args) if cmd
    begin
      tk_call_without_enc(*(what + ["<#{tk_event_sequence(context)}>", 
			      mode + id]))
    rescue
      uninstall_cmd(id) if cmd
      fail
    end
  end

  def _bind(what, context, cmd, args=nil)
    _bind_core('', what, context, cmd, args)
  end

  def _bind_append(what, context, cmd, args=nil)
    _bind_core('+', what, context, cmd, args)
  end

  def _bind_remove(what, context)
    tk_call_without_enc(*(what + ["<#{tk_event_sequence(context)}>", '']))
  end

  def _bindinfo(what, context=nil)
    if context
      tk_call_without_enc(*what+["<#{tk_event_sequence(context)}>"]) .collect {|cmdline|
	if cmdline =~ /^rb_out (c\d+)\s+(.*)$/
	  #[Tk_CMDTBL[$1], $2]
	  [TkCore::INTERP.tk_cmd_tbl[$1], $2]
	else
	  cmdline
	end
      }
    else
      tk_split_simplelist(tk_call_without_enc(*what)).collect!{|seq|
	l = seq.scan(/<*[^<>]+>*/).collect!{|subseq|
	  case (subseq)
	  when /^<<[^<>]+>>$/
	    TkVirtualEvent.getobj(subseq[1..-2])
	  when /^<[^<>]+>$/
	    subseq[1..-2]
	  else
	    subseq.split('')
	  end
	}.flatten
	(l.size == 1) ? l[0] : l
      }
    end
  end
  private :install_bind, :tk_event_sequence, 
          :_bind_core, :_bind, :_bind_append, :_bind_remove, :_bindinfo

  def bind(tagOrClass, context, cmd=Proc.new, args=nil)
    _bind(["bind", tagOrClass], context, cmd, args)
    tagOrClass
  end

  def bind_append(tagOrClass, context, cmd=Proc.new, args=nil)
    _bind_append(["bind", tagOrClass], context, cmd, args)
    tagOrClass
  end

  def bind_remove(tagOrClass, context)
    _bind_remove(['bind', tagOrClass], context)
    tagOrClass
  end

  def bindinfo(tagOrClass, context=nil)
    _bindinfo(['bind', tagOrClass], context)
  end

  def bind_all(context, cmd=Proc.new, args=nil)
    _bind(['bind', 'all'], context, cmd, args)
    TkBindTag::ALL
  end

  def bind_append_all(context, cmd=Proc.new, args=nil)
    _bind_append(['bind', 'all'], context, cmd, args)
    TkBindTag::ALL
  end

  def bind_remove_all(context)
    _bind_remove(['bind', 'all'], context)
    TkBindTag::ALL
  end

  def bindinfo_all(context=nil)
    _bindinfo(['bind', 'all'], context)
  end
end


module TkCore
  include TkComm
  extend TkComm

  unless self.const_defined? :INTERP
    if self.const_defined? :IP_NAME
      name = IP_NAME.to_s
    else
      #name = nil
      name = $0
    end
    if self.const_defined? :IP_OPTS
      if IP_OPTS.kind_of?(Hash)
	opts = hash_kv(IP_OPTS).join(' ')
      else
	opts = IP_OPTS.to_s
      end
    else
      opts = ''
    end

    INTERP = TclTkIp.new(name, opts)

    def INTERP.__getip
      self
    end

    INTERP.instance_eval{
      @tk_cmd_tbl = {}.taint
      @tk_windows = {}.taint

      @tk_table_list = [].taint

      @init_ip_env  = [].taint  # table of Procs
      @add_tk_procs = [].taint  # table of [name, args, body]

      @cb_entry_class = Class.new(TkCallbackEntry){|c|
	class << c
	  def inspect
	    sprintf("#<Class(TkCallbackEntry):%0x>", self.__id__)
	  end
	  alias to_s inspect
	end

	def initialize(ip, cmd)
	  @ip = ip
	  @cmd = cmd
	end
	attr_reader :ip, :cmd
	def call(*args)
	  @ip.cb_eval(@cmd, *args)
	end
	def inspect
	  sprintf("#<cb_entry:%0x>", self.__id__)
	end
	alias to_s inspect
      }.freeze
    }

    def INTERP.cb_entry_class
      @cb_entry_class
    end
    def INTERP.tk_cmd_tbl
      @tk_cmd_tbl
    end
    def INTERP.tk_windows
      @tk_windows
    end

    class Tk_OBJECT_TABLE
      def initialize(id)
	@id = id
      end
      def method_missing(m, *args, &b)
	TkCore::INTERP.tk_object_table(@id).send(m, *args, &b)
      end
    end

    def INTERP.tk_object_table(id)
      @tk_table_list[id]
    end
    def INTERP.create_table
      id = @tk_table_list.size
      (tbl = {}).tainted? || tbl.taint
      @tk_table_list << tbl
#      obj = Object.new
#      obj.instance_eval <<-EOD
#        def self.method_missing(m, *args)
#	  TkCore::INTERP.tk_object_table(#{id}).send(m, *args)
#        end
#      EOD
#      return obj
      Tk_OBJECT_TABLE.new(id)
    end

    def INTERP.get_cb_entry(cmd)
      @cb_entry_class.new(__getip, cmd).freeze
    end
    def INTERP.cb_eval(cmd, *args)
      TkUtil._get_eval_string(TkUtil.eval_cmd(cmd, *args))
    end

    def INTERP.init_ip_env(script = Proc.new)
      @init_ip_env << script
      script.call(self)
    end
    def INTERP.add_tk_procs(name, args = nil, body = nil)
      @add_tk_procs << [name, args, body]
      self._invoke('proc', name, args, body) if args && body
    end
    def INTERP.init_ip_internal
      ip = self
      @init_ip_env.each{|script| script.call(ip)}
      @add_tk_procs.each{|name,args,body| ip._invoke('proc',name,args,body)}
    end
  end

  WIDGET_DESTROY_HOOK = '<WIDGET_DESTROY_HOOK>'
  INTERP._invoke_without_enc('event', 'add', 
			     "<#{WIDGET_DESTROY_HOOK}>", 'Destroy')
  INTERP._invoke_without_enc('bind', 'all', "<#{WIDGET_DESTROY_HOOK}>",
			     install_bind(proc{|xpath|
				path = xpath[1..-1]
				unless TkCore::INTERP.deleted?
				  if (widget = TkCore::INTERP.tk_windows[path])
				    if widget.respond_to?(:__destroy_hook__)
				      begin
					widget.__destroy_hook__
				      rescue Exception
				      end
				    end
				  end
				end
			     }, 'x%W'))
  INTERP.add_tk_procs(TclTkLib::FINALIZE_PROC_NAME, '', 
		      "bind all <#{WIDGET_DESTROY_HOOK}> {}")

  INTERP.add_tk_procs('rb_out', 'args', <<-'EOL')
    if {[set st [catch {eval {ruby_cmd TkCore callback} $args} ret]] != 0} {
       #return -code $st $ret
       set idx [string first "\n\n" $ret]
       if {$idx > 0} {
          return -code $st \
                 -errorinfo [string range $ret [expr $idx + 2] \
                                               [string length $ret]] \
                 [string range $ret 0 [expr $idx - 1]]
       } else {
          return -code $st $ret
       }
    } else {
	return $ret
    }
  EOL
=begin
  INTERP.add_tk_procs('rb_out', 'args', <<-'EOL')
    #regsub -all {\\} $args {\\\\} args
    #regsub -all {!} $args {\\!} args
    #regsub -all "{" $args "\\{" args
    regsub -all {(\\|!|\{|\})} $args {\\\1} args
    if {[set st [catch {ruby [format "TkCore.callback %%Q!%s!" $args]} ret]] != 0} {
       #return -code $st $ret
       set idx [string first "\n\n" $ret]
       if {$idx > 0} {
          return -code $st \
                 -errorinfo [string range $ret [expr $idx + 2] \
                                               [string length $ret]] \
                 [string range $ret 0 [expr $idx - 1]]
       } else {
          return -code $st $ret
       }
    } else {
	return $ret
    }
  EOL
=end

  EventFlag = TclTkLib::EventFlag

  def callback_break
    fail TkCallbackBreak, "Tk callback returns 'break' status"
  end

  def callback_continue
    fail TkCallbackContinue, "Tk callback returns 'continue' status"
  end

  def TkCore.callback(*arg)
    begin
      TkCore::INTERP.tk_cmd_tbl[arg.shift].call(*arg)
    rescue Exception => e
      begin
	msg = _toUTF8(e.class.inspect) + ': ' + 
	      _toUTF8(e.message) + "\n" + 
	      "\n---< backtrace of Ruby side >-----\n" + 
	      _toUTF8(e.backtrace.join("\n")) + 
	      "\n---< backtrace of Tk side >-------"
	msg.instance_variable_set(:@encoding, 'utf-8')
      rescue Exception
	msg = e.class.inspect + ': ' + e.message + "\n" + 
	      "\n---< backtrace of Ruby side >-----\n" + 
	      e.backtrace.join("\n") + 
	      "\n---< backtrace of Tk side >-------"
      end
      fail(e, msg)
    end
  end
=begin
  def TkCore.callback(arg_str)
    # arg = tk_split_list(arg_str)
    arg = tk_split_simplelist(arg_str)
    #_get_eval_string(TkUtil.eval_cmd(Tk_CMDTBL[arg.shift], *arg))
    #_get_eval_string(TkUtil.eval_cmd(TkCore::INTERP.tk_cmd_tbl[arg.shift], 
    #  			     *arg))
    # TkCore::INTERP.tk_cmd_tbl[arg.shift].call(*arg)
    begin
      TkCore::INTERP.tk_cmd_tbl[arg.shift].call(*arg)
    rescue Exception => e
      raise(e, e.class.inspect + ': ' + e.message + "\n" + 
               "\n---< backtrace of Ruby side >-----\n" + 
               e.backtrace.join("\n") + 
               "\n---< backtrace of Tk side >-------")
    end
#=begin
#    cb_obj = TkCore::INTERP.tk_cmd_tbl[arg.shift]
#    unless $DEBUG
#      cb_obj.call(*arg)
#    else
#      begin
#	raise 'check backtrace'
#      rescue
#	# ignore backtrace before 'callback'
#	pos = -($!.backtrace.size)
#      end
#      begin
#	cb_obj.call(*arg)
#      rescue
#	trace = $!.backtrace
#	raise $!, "\n#{trace[0]}: #{$!.message} (#{$!.class})\n" + 
#	          "\tfrom #{trace[1..pos].join("\n\tfrom ")}"
#      end
#    end
#=end
  end
=end

  def load_cmd_on_ip(tk_cmd)
    bool(tk_call('auto_load', tk_cmd))
  end

  def after(ms, cmd=Proc.new)
    myid = _curr_cmd_id
    cmdid = install_cmd(cmd)
    tk_call_without_enc("after",ms,cmdid)  # return id
#    return
#    if false #defined? Thread
#      Thread.start do
#	ms = Float(ms)/1000
#	ms = 10 if ms == 0
#	sleep ms/1000
#	cmd.call
#      end
#    else
#      cmdid = install_cmd(cmd)
#      tk_call("after",ms,cmdid)
#    end
  end

  def after_idle(cmd=Proc.new)
    myid = _curr_cmd_id
    cmdid = install_cmd(cmd)
    tk_call_without_enc('after','idle',cmdid)
  end

  def windowingsystem
    tk_call_without_enc('tk', 'windowingsystem')
  end

  def scaling(scale=nil)
    if scale
      tk_call_without_enc('tk', 'scaling', scale)
    else
      Float(number(tk_call_without_enc('tk', 'scaling')))
    end
  end
  def scaling_displayof(win, scale=nil)
    if scale
      tk_call_without_enc('tk', 'scaling', '-displayof', win, scale)
    else
      Float(number(tk_call_without_enc('tk', '-displayof', win, 'scaling')))
    end
  end

  def appname(name=None)
    tk_call('tk', 'appname', name)
  end

  def appsend(interp, async, *args)
    if async
      tk_call('send', '-async', '--', interp, *args)
    else
      tk_call('send', '--', interp, *args)
    end
  end

  def rb_appsend(interp, async, *args)
    #args = args.collect!{|c| _get_eval_string(c).gsub(/[\[\]$"]/, '\\\\\&')}
    args = args.collect!{|c| _get_eval_string(c).gsub(/[\[\]$"\\]/, '\\\\\&')}
    args.push(').to_s"')
    appsend(interp, async, 'ruby "(', *args)
  end

  def appsend_displayof(interp, win, async, *args)
    win = '.' if win == nil
    if async
      tk_call('send', '-async', '-displayof', win, '--', interp, *args)
    else
      tk_call('send', '-displayor', win, '--', interp, *args)
    end
  end

  def rb_appsend_displayof(interp, win, async, *args)
    #args = args.collect!{|c| _get_eval_string(c).gsub(/[\[\]$"]/, '\\\\\&')}
    args = args.collect!{|c| _get_eval_string(c).gsub(/[\[\]$"\\]/, '\\\\\&')}
    args.push(').to_s"')
    appsend_displayof(interp, win, async, 'ruby "(', *args)
  end

  def info(*args)
    tk_call('info', *args)
  end

  def mainloop(check_root = true)
    TclTkLib.mainloop(check_root)
  end

  def mainloop_watchdog(check_root = true)
    # watchdog restarts mainloop when mainloop is dead
    TclTkLib.mainloop_watchdog(check_root)
  end

  def do_one_event(flag = TclTkLib::EventFlag::ALL)
    TclTkLib.do_one_event(flag)
  end

  def set_eventloop_tick(timer_tick)
    TclTkLib.set_eventloop_tick(timer_tick)
  end

  def get_eventloop_tick()
    TclTkLib.get_eventloop_tick
  end

  def set_no_event_wait(wait)
    TclTkLib.set_no_even_wait(wait)
  end

  def get_no_event_wait()
    TclTkLib.get_no_eventloop_wait
  end

  def set_eventloop_weight(loop_max, no_event_tick)
    TclTkLib.set_eventloop_weight(loop_max, no_event_tick)
  end

  def get_eventloop_weight()
    TclTkLib.get_eventloop_weight
  end

  def restart(app_name = nil, keys = {})
    TkCore::INTERP.init_ip_internal

    tk_call('set', 'argv0', app_name) if app_name
    if keys.kind_of?(Hash)
      # tk_call('set', 'argc', keys.size * 2)
      tk_call('set', 'argv', hash_kv(keys).join(' '))
    end

    INTERP.restart
    nil
  end

  def event_generate(window, context, keys=nil)
    #window = window.path if window.kind_of?(TkObject)
    if keys
      tk_call_without_enc('event', 'generate', window, 
			  "<#{tk_event_sequence(context)}>", 
			  *hash_kv(keys, true))
    else
      tk_call_without_enc('event', 'generate', window, 
			  "<#{tk_event_sequence(context)}>")
    end
    nil
  end

  def messageBox(keys)
    tk_call('tk_messageBox', *hash_kv(keys))
  end

  def getOpenFile(keys = nil)
    tk_call('tk_getOpenFile', *hash_kv(keys))
  end

  def getSaveFile(keys = nil)
    tk_call('tk_getSaveFile', *hash_kv(keys))
  end

  def chooseColor(keys = nil)
    tk_call('tk_chooseColor', *hash_kv(keys))
  end

  def chooseDirectory(keys = nil)
    tk_call('tk_chooseDirectory', *hash_kv(keys))
  end

  def _ip_eval_core(enc_mode, cmd_string)
    case enc_mode
    when nil
      res = INTERP._eval(cmd_string)
    when false
      res = INTERP._eval_without_enc(cmd_string)
    when true
      res = INTERP._eval_with_enc(cmd_string)
    end
    if  INTERP._return_value() != 0
      fail RuntimeError, res, error_at
    end
    return res
  end
  private :_ip_eval_core

  def ip_eval(cmd_string)
    _ip_eval_core(nil, cmd_string)
  end

  def ip_eval_without_enc(cmd_string)
    _ip_eval_core(false, cmd_string)
  end

  def ip_eval_with_enc(cmd_string)
    _ip_eval_core(true, cmd_string)
  end

  def _ip_invoke_core(enc_mode, *args)
    case enc_mode
    when false
      res = INTERP._invoke_without_enc(*args)
    when nil
      res = INTERP._invoke(*args)
    when true
      res = INTERP._invoke_with_enc(*args)
    end
    if  INTERP._return_value() != 0
      fail RuntimeError, res, error_at
    end
    return res
  end
  private :_ip_invoke_core

  def ip_invoke(*args)
    _ip_invoke_core(nil, *args)
  end

  def ip_invoke_without_enc(*args)
    _ip_invoke_core(false, *args)
  end

  def ip_invoke_with_enc(*args)
    _ip_invoke_core(true, *args)
  end

  def _tk_call_core(enc_mode, *args)
    ### puts args.inspect if $DEBUG
    #args.collect! {|x|ruby2tcl(x, enc_mode)}
    #args.compact!
    #args.flatten!
    args = _conv_args([], enc_mode, *args)
    puts 'invoke args => ' + args.inspect if $DEBUG
    ### print "=> ", args.join(" ").inspect, "\n" if $DEBUG
    begin
      # res = INTERP._invoke(*args).taint
      # res = INTERP._invoke(enc_mode, *args)
      res = _ip_invoke_core(enc_mode, *args)
      # >>>>>  _invoke returns a TAINTED string  <<<<<
    rescue NameError => err
      # err = $!
      begin
        args.unshift "unknown"
        #res = INTERP._invoke(*args).taint 
        #res = INTERP._invoke(enc_mode, *args) 
        res = _ip_invoke_core(enc_mode, *args) 
	# >>>>>  _invoke returns a TAINTED string  <<<<<
      rescue StandardError => err2
	fail err2 unless /^invalid command/ =~ err2.message
	fail err
      end
    end
    if  INTERP._return_value() != 0
      fail RuntimeError, res, error_at
    end
    ### print "==> ", res.inspect, "\n" if $DEBUG
    return res
  end
  private :_tk_call_core

  def tk_call(*args)
    _tk_call_core(nil, *args)
  end

  def tk_call_without_enc(*args)
    _tk_call_core(false, *args)
  end

  def tk_call_with_enc(*args)
    _tk_call_core(true, *args)
  end
end


module Tk
  include TkCore
  extend Tk

  TCL_VERSION = INTERP._invoke_without_enc("info", "tclversion").freeze
  TCL_PATCHLEVEL = INTERP._invoke_without_enc("info", "patchlevel").freeze

  TK_VERSION  = INTERP._invoke_without_enc("set", "tk_version").freeze
  TK_PATCHLEVEL  = INTERP._invoke_without_enc("set", "tk_patchLevel").freeze

  JAPANIZED_TK = (INTERP._invoke_without_enc("info", "commands", 
					     "kanji") != "").freeze

  def Tk.const_missing(sym)
    case(sym)
    when :TCL_LIBRARY
      INTERP._invoke("set", "tcl_library").freeze

    when :TK_LIBRARY
      INTERP._invoke("set", "tk_library").freeze

    when :LIBRARY
      INTERP._invoke("info", "library").freeze

    #when :PKG_PATH, :PACKAGE_PATH, :TCL_PACKAGE_PATH
    #  tk_split_simplelist(INTERP._invoke('set', 'tcl_pkgPath'))

    #when :LIB_PATH, :LIBRARY_PATH, :TCL_LIBRARY_PATH
    #  tk_split_simplelist(INTERP._invoke('set', 'tcl_libPath'))

    when :PLATFORM, :TCL_PLATFORM
      if $SAFE >= 4
	fail SecurityError, "can't get #{sym} when $SAFE >= 4"
      end
      Hash[*tk_split_simplelist(INTERP._invoke_without_enc('array', 'get', 
							   'tcl_platform'))]

    when :ENV
      Hash[*tk_split_simplelist(INTERP._invoke('array', 'get', 'env'))]

    #when :AUTO_PATH   #<=== 
    #  tk_split_simplelist(INTERP._invoke('set', 'auto_path'))

    #when :AUTO_OLDPATH
    #  tk_split_simplelist(INTERP._invoke('set', 'auto_oldpath'))

    when :AUTO_INDEX
      Hash[*tk_split_simplelist(INTERP._invoke('array', 'get', 'auto_index'))]

    when :PRIV, :PRIVATE, :TK_PRIV
      priv = {}
      if INTERP._invoke_without_enc('info', 'vars', 'tk::Priv') != ""
	var_nam = 'tk::Priv'
      else
	var_nam = 'tkPriv'
      end
      Hash[*tk_split_simplelist(INTERP._invoke('array', 'get', 
					       var_nam))].each{|k,v|
	k.freeze
	case v
	when /^-?\d+$/
	  priv[k] = v.to_i
	when /^-?\d+\.?\d*(e[-+]?\d+)?$/
	  priv[k] = v.to_f
	else
	  priv[k] = v.freeze
	end
      }
      priv

    else
      raise NameError, 'uninitialized constant Tk::' + sym.id2name
    end
  end

  def root
    TkRoot.new
  end

  def Tk.load_tclscript(file, enc=nil)
    if enc
      # TCL_VERSION >= 8.5
      tk_call('source', '-encoding', enc, file)
    else
      tk_call('source', file)
    end
  end

  def Tk.load_tcllibrary(file, pkg_name=None, interp=None)
    tk_call('load', file, pkg_name, interp)
  end

  def Tk.unload_tcllibrary(*args)
    if args[-1].kind_of?(Hash)
      keys = _symbolkey2str(args.pop)
      nocomp = (keys['nocomplain'])? '-nocomplain': None
      keeplib = (keys['keeplibrary'])? '-keeplibrary': None
      tk_call('unload', nocomp, keeplib, '--', *args)
    else
      tk_call('unload', *args)
    end
  end

  def Tk.bell(nice = false)
    if nice
      tk_call_without_enc('bell', '-nice')
    else
      tk_call_without_enc('bell')
    end
    nil
  end

  def Tk.bell_on_display(win, nice = false)
    if nice
      tk_call_without_enc('bell', '-displayof', win, '-nice')
    else
      tk_call_without_enc('bell', '-displayof', win)
    end
    nil
  end

  def Tk.destroy(*wins)
    tk_call_without_enc('destroy', *wins)
  end

  def Tk.exit
    tk_call_without_enc('destroy', '.')
  end

  def Tk.pack(*args)
    #TkPack.configure(*args)
    TkPack(*args)
  end

  def Tk.grid(*args)
    TkGrid.configure(*args)
  end

  def Tk.update(idle=nil)
    if idle
      tk_call_without_enc('update', 'idletasks')
    else
      tk_call_without_enc('update')
    end
  end
  def Tk.update_idletasks
    update(true)
  end

=begin
  #  See tcltklib.c for the reason of why the following methods are disabled. 
  def Tk.thread_update(idle=nil)
    if idle
      tk_call_without_enc('thread_update', 'idletasks')
    else
      tk_call_without_enc('thread_update')
    end
  end
  def Tk.thread_update_idletasks
    thread_update(true)
  end
=end

  def Tk.current_grabs(win = nil)
    if win
      window(tk_call_without_enc('grab', 'current', win))
    else
      tk_split_list(tk_call_without_enc('grab', 'current'))
    end
  end

  def Tk.focus(display=nil)
    if display == nil
      window(tk_call_without_enc('focus'))
    else
      window(tk_call_without_enc('focus', '-displayof', display))
    end
  end

  def Tk.focus_to(win, force=false)
    if force
      tk_call_without_enc('focus', '-force', win)
    else
      tk_call_without_enc('focus', win)
    end
  end

  def Tk.focus_lastfor(win)
    window(tk_call_without_enc('focus', '-lastfor', win))
  end

  def Tk.focus_next(win)
    TkManageFocus.next(win)
  end

  def Tk.focus_prev(win)
    TkManageFocus.prev(win)
  end

  def Tk.strictMotif(bool=None)
    bool(tk_call_without_enc('set', 'tk_strictMotif', bool))
  end

  def Tk.show_kinsoku(mode='both')
    begin
      if /^8\.*/ === TK_VERSION  && JAPANIZED_TK
        tk_split_simplelist(tk_call('kinsoku', 'show', mode))
      end
    rescue
    end
  end
  def Tk.add_kinsoku(chars, mode='both')
    begin
      if /^8\.*/ === TK_VERSION  && JAPANIZED_TK
        tk_split_simplelist(tk_call('kinsoku', 'add', mode, 
                                    *(chars.split(''))))
      else
        []
      end
    rescue
      []
    end
  end
  def Tk.delete_kinsoku(chars, mode='both')
    begin
      if /^8\.*/ === TK_VERSION  && JAPANIZED_TK
        tk_split_simplelist(tk_call('kinsoku', 'delete', mode, 
                            *(chars.split(''))))
      end
    rescue
    end
  end

  def Tk.toUTF8(str, encoding = nil)
    _toUTF8(str, encoding)
  end
  
  def Tk.fromUTF8(str, encoding = nil)
    _fromUTF8(str, encoding)
  end
end

###########################################
#  string with Tcl's encoding
###########################################
module Tk
  def Tk.subst_utf_backslash(str)
    Tk::EncodedString.subst_utf_backslash(str)
  end
  def Tk.subst_tk_backslash(str)
    Tk::EncodedString.subst_tk_backslash(str)
  end
  def Tk.utf_to_backslash_sequence(str)
    Tk::EncodedString.utf_to_backslash_sequence(str)
  end
  def Tk.utf_to_backslash(str)
    Tk::EncodedString.utf_to_backslash_sequence(str)
  end
  def Tk.to_backslash_sequence(str)
    Tk::EncodedString.to_backslash_sequence(str)
  end
end


###########################################
#  convert kanji string to/from utf-8
###########################################
if (/^(8\.[1-9]|9\.|[1-9][0-9])/ =~ Tk::TCL_VERSION && !Tk::JAPANIZED_TK)
  class TclTkIp
    # from tkencoding.rb by ttate@jaist.ac.jp
    attr_accessor :encoding

    alias __eval _eval
    alias __invoke _invoke

    alias __toUTF8 _toUTF8
    alias __fromUTF8 _fromUTF8

=begin
    #### --> definition is moved to TclTkIp module

    def _toUTF8(str, encoding = nil)
      # decide encoding
      if encoding
	encoding = encoding.to_s
      elsif str.kind_of?(Tk::EncodedString) && str.encoding != nil
	encoding = str.encoding.to_s
      elsif str.instance_variable_get(:@encoding)
	encoding = str.instance_variable_get(:@encoding).to_s
      elsif defined?(@encoding) && @encoding != nil
	encoding = @encoding.to_s
      else
	encoding = __invoke('encoding', 'system')
      end

      # convert
      case encoding
      when 'utf-8', 'binary'
	str
      else
	__toUTF8(str, encoding)
      end
    end

    def _fromUTF8(str, encoding = nil)
      unless encoding
	if defined?(@encoding) && @encoding != nil
	  encoding = @encoding.to_s
	else
	  encoding = __invoke('encoding', 'system')
	end
      end

      if str.kind_of?(Tk::EncodedString)
	if str.encoding == 'binary'
	  str
	else
	  __fromUTF8(str, encoding)
	end
      elsif str.instance_variable_get(:@encoding).to_s == 'binary'
	str
      else
	__fromUTF8(str, encoding)
      end
    end
=end

    def _eval(cmd)
      _fromUTF8(__eval(_toUTF8(cmd)))
    end

    def _invoke(*cmds)
      _fromUTF8(__invoke(*(cmds.collect{|cmd| _toUTF8(cmd)})))
    end

    alias _eval_with_enc _eval
    alias _invoke_with_enc _invoke

=begin
    def _eval(cmd)
      if defined?(@encoding) && @encoding != 'utf-8'
	ret = if cmd.kind_of?(Tk::EncodedString)
		case cmd.encoding
		when 'utf-8', 'binary'
		  __eval(cmd)
		else
		  __eval(_toUTF8(cmd, cmd.encoding))
		end
	      elsif cmd.instance_variable_get(:@encoding) == 'binary'
		__eval(cmd)
	      else
		__eval(_toUTF8(cmd, @encoding))
	      end
	if ret.kind_of?(String) && ret.instance_variable_get(:@encoding) == 'binary'
	  ret
	else
	  _fromUTF8(ret, @encoding)
	end
      else
	__eval(cmd)
      end
    end

    def _invoke(*cmds)
      if defined?(@encoding) && @encoding != 'utf-8'
	cmds = cmds.collect{|cmd|
	  if cmd.kind_of?(Tk::EncodedString)
	    case cmd.encoding
	    when 'utf-8', 'binary'
	      cmd
	    else
	      _toUTF8(cmd, cmd.encoding)
	    end
	  elsif cmd.instance_variable_get(:@encoding) == 'binary'
	    cmd
	  else
	    _toUTF8(cmd, @encoding)
	  end
	}
	ret = __invoke(*cmds)
	if ret.kind_of?(String) && ret.instance_variable_get(:@encoding) == 'binary'
	  ret
	else
	  _fromUTF8(ret, @encoding)
	end
      else
	__invoke(*cmds)
	end
    end
=end
  end

  module Tk
    module Encoding
      extend Encoding

      TkCommandNames = ['encoding'.freeze].freeze

      def encoding=(name)
	TkCore::INTERP.encoding = name
      end

      def encoding
	TkCore::INTERP.encoding
      end

      def encoding_names
	tk_split_simplelist(tk_call('encoding', 'names'))
      end

      def encoding_system
	tk_call('encoding', 'system')
      end

      def encoding_system=(enc)
	tk_call('encoding', 'system', enc)
      end

      def encoding_convertfrom(str, enc=None)
	TkCore::INTERP.__invoke('encoding', 'convertfrom', enc, str)
      end
      alias encoding_convert_from encoding_convertfrom

      def encoding_convertto(str, enc=None)
	TkCore::INTERP.__invoke('encoding', 'convertto', enc, str)
      end
      alias encoding_convert_to encoding_convertto
    end

    extend Encoding
  end

  # estimate encoding
  case $KCODE
  when /^e/i  # EUC
    Tk.encoding = 'euc-jp'
  when /^s/i  # SJIS
    Tk.encoding = 'shiftjis'
  when /^u/i  # UTF8
    Tk.encoding = 'utf-8'
  else        # NONE
    begin
      Tk.encoding = Tk.encoding_system
    rescue StandardError, NameError
      Tk.encoding = 'utf-8'
    end
  end

else
  # dummy methods
  class TclTkIp
    alias __eval _eval
    alias __invoke _invoke

    alias _eval_with_enc _eval
    alias _invoke_with_enc _invoke
  end

  module Tk
    module Encoding
      extend Encoding

      def encoding=(name)
	nil
      end
      def encoding
	nil
      end
      def encoding_names
	nil
      end
      def encoding_system
	nil
      end
      def encoding_system=(enc)
	nil
      end

      def encoding_convertfrom(str, enc=None)
	str
      end
      alias encoding_convert_from encoding_convertfrom

      def encoding_convertto(str, enc=None)
	str
      end
      alias encoding_convert_to encoding_convertto
    end
  end
end


module TkTreatFont
  def font_configinfo(name = nil)
    ret = TkFont.used_on(self.path)
    if ret == nil
=begin
      if name
	ret = name
      else
	ret = TkFont.init_widget_font(self.path, self.path, 'configure')
      end
=end
      ret = TkFont.init_widget_font(self.path, self.path, 'configure')
    end
    ret
  end
  alias fontobj font_configinfo

  def font_configure(slot)
    slot = _symbolkey2str(slot)

    if slot.key?('font')
      fnt = slot.delete('font')
      if fnt.kind_of? TkFont
	return fnt.call_font_configure(self.path, self.path,'configure',slot)
      else
	if fnt 
	  if (slot.key?('kanjifont') || 
	      slot.key?('latinfont') || 
	      slot.key?('asciifont'))
	    fnt = TkFont.new(fnt)

	    lfnt = slot.delete('latinfont')
	    lfnt = slot.delete('asciifont') if slot.key?('asciifont')
	    kfnt = slot.delete('kanjifont')

	    fnt.latin_replace(lfnt) if lfnt
	    fnt.kanji_replace(kfnt) if kfnt
	  else
	    slot['font'] = fnt
	    tk_call(self.path, 'configure', *hash_kv(slot))
	  end
	end
	return self
      end
    end

    lfnt = slot.delete('latinfont')
    lfnt = slot.delete('asciifont') if slot.key?('asciifont')
    kfnt = slot.delete('kanjifont')

    if lfnt && kfnt
      return TkFont.new(lfnt, kfnt).call_font_configure(self.path, self.path, 
							'configure', slot)
    end

    latinfont_configure(lfnt) if lfnt
    kanjifont_configure(kfnt) if kfnt
      
    tk_call(self.path, 'configure', *hash_kv(slot)) if slot != {}
    self
  end

  def latinfont_configure(ltn, keys=nil)
    if (fobj = TkFont.used_on(self.path))
      fobj = TkFont.new(fobj) # create a new TkFont object
    elsif Tk::JAPANIZED_TK
      fobj = fontobj          # create a new TkFont object
    else
      tk_call(self.path, 'configure', '-font', ltn)
      return self
    end

    if fobj.kind_of?(TkFont)
      if ltn.kind_of? TkFont
	conf = {}
	ltn.latin_configinfo.each{|key,val| conf[key] = val}
	if keys
	  fobj.latin_configure(conf.update(keys))
	else
	  fobj.latin_configure(conf)
	end
      else
	fobj.latin_replace(ltn)
      end
    end

    return fobj.call_font_configure(self.path, self.path, 'configure', {})
  end
  alias asciifont_configure latinfont_configure

  def kanjifont_configure(knj, keys=nil)
    if (fobj = TkFont.used_on(self.path))
      fobj = TkFont.new(fobj) # create a new TkFont object
    elsif Tk::JAPANIZED_TK
      fobj = fontobj          # create a new TkFont object
    else
      tk_call(self.path, 'configure', '-font', knj)
      return self
    end

    if fobj.kind_of?(TkFont)
      if knj.kind_of? TkFont
	conf = {}
	knj.kanji_configinfo.each{|key,val| conf[key] = val}
	if keys
	  fobj.kanji_configure(conf.update(keys))
	else
	  fobj.kanji_configure(conf)
	end
      else
	fobj.kanji_replace(knj)
      end
    end

    return fobj.call_font_configure(self.path, self.path, 'configure', {})
  end

  def font_copy(window, tag=nil)
    if tag
      fnt = window.tagfontobj(tag).dup
    else
      fnt = window.fontobj.dup
    end
    fnt.call_font_configure(self.path, self.path, 'configure', {})
    self
  end

  def latinfont_copy(window, tag=nil)
    fontobj.dup.call_font_configure(self.path, self.path, 'configure', {})
    if tag
      fontobj.latin_replace(window.tagfontobj(tag).latin_font_id)
    else
      fontobj.latin_replace(window.fontobj.latin_font_id)
    end
    self
  end
  alias asciifont_copy latinfont_copy

  def kanjifont_copy(window, tag=nil)
    fontobj.dup.call_font_configure(self.path, self.path, 'configure', {})
    if tag
      fontobj.kanji_replace(window.tagfontobj(tag).kanji_font_id)
    else
      fontobj.kanji_replace(window.fontobj.kanji_font_id)
    end
    self
  end
end


module TkBindCore
  def bind(context, cmd=Proc.new, args=nil)
    Tk.bind(self, context, cmd, args)
  end

  def bind_append(context, cmd=Proc.new, args=nil)
    Tk.bind_append(self, context, cmd, args)
  end

  def bind_remove(context)
    Tk.bind_remove(self, context)
  end

  def bindinfo(context=nil)
    Tk.bindinfo(self, context)
  end
end


class TkObject<TkKernel
  include Tk
  include TkTreatFont
  include TkBindCore

  def path
    @path
  end

  def epath
    @path
  end

  def to_eval
    @path
  end

  def tk_send(cmd, *rest)
    tk_call(path, cmd, *rest)
  end
  def tk_send_without_enc(cmd, *rest)
    tk_call_without_enc(path, cmd, *rest)
  end
  def tk_send_with_enc(cmd, *rest)
    tk_call_with_enc(path, cmd, *rest)
  end
  private :tk_send, :tk_send_without_enc, :tk_send_with_enc

  def method_missing(id, *args)
    name = id.id2name
    case args.length
    when 1
      if name[-1] == ?=
	configure name[0..-2], args[0]
      else
	configure name, args[0]
      end
    when 0
      begin
	cget(name)
      rescue
	fail NameError, 
	     "undefined local variable or method `#{name}' for #{self.to_s}", 
	     error_at
      end
    else
      fail NameError, "undefined method `#{name}' for #{self.to_s}", error_at
    end
  end

  def [](id)
    cget(id)
  end

  def []=(id, val)
    configure(id, val)
    val
  end

  def cget(slot)
    case slot.to_s
    when 'text', 'label', 'show', 'data', 'file'
      #tk_call(path, 'cget', "-#{slot}")
      _fromUTF8(tk_call_without_enc(path, 'cget', "-#{slot}"))
    when 'font', 'kanjifont'
      #fnt = tk_tcl2ruby(tk_call(path, 'cget', "-#{slot}"))
      #fnt = tk_tcl2ruby(tk_call(path, 'cget', "-font"))
      fnt = tk_tcl2ruby(tk_call_without_enc(path, 'cget', "-font"), true)
      unless fnt.kind_of?(TkFont)
	fnt = fontobj(fnt)
      end
      if slot == 'kanjifont' && JAPANIZED_TK && TK_VERSION =~ /^4\.*/
	# obsolete; just for compatibility
	fnt.kanji_font
      else
	fnt
      end
    else
      tk_tcl2ruby(tk_call_without_enc(path, 'cget', "-#{slot}"), true)
    end
  end

  def configure(slot, value=None)
    if slot.kind_of? Hash
      if (slot['font'] || slot[:font] || 
          slot['kanjifont'] || slot[:kanjifont] || 
	  slot['latinfont'] || slot[:latinfont] || 
          slot['asciifont'] || slot[:asciifont] )
	font_configure(slot)
      elsif slot.size > 0
	tk_call(path, 'configure', *hash_kv(slot))
      end

    else
      if (slot == 'font' || slot == :font || 
          slot == 'kanjifont' || slot == :kanjifont || 
	  slot == 'latinfont' || slot == :latinfont || 
          slot == 'asciifont' || slot == :asciifont )
	if value == None
	  fontobj
	else
	  font_configure({slot=>value})
	end
      else
	tk_call(path, 'configure', "-#{slot}", value)
      end
    end
    self
  end

  def configure_cmd(slot, value)
    configure(slot, install_cmd(value))
  end

  def configinfo(slot = nil)
    if TkComm::GET_CONFIGINFO_AS_ARRAY
      if slot == 'font' || slot == :font || 
	  slot == 'kanjifont' || slot == :kanjifont
	conf = tk_split_simplelist(_fromUTF8(tk_send_without_enc('configure', "-#{slot}")))
	conf[0] = conf[0][1..-1]
	conf[4] = fontobj(conf[4])
	conf
      else
	if slot
	  case slot.to_s
	  when 'text', 'label', 'show', 'data', 'file'
	    conf = tk_split_simplelist(_fromUTF8(tk_send_without_enc('configure', "-#{slot}")))
	  else
	    conf = tk_split_list(_fromUTF8(tk_send_without_enc('configure', "-#{slot}")))
	  end
	  conf[0] = conf[0][1..-1]
	  conf
	else
	  ret = tk_split_simplelist(_fromUTF8(tk_send_without_enc('configure'))).collect{|conflist|
	    conf = tk_split_simplelist(conflist)
	    conf[0] = conf[0][1..-1]
	    case conf[0]
	    when 'text', 'label', 'show', 'data', 'file'
	    else
	      if conf[3]
		if conf[3].index('{')
		  conf[3] = tk_split_list(conf[3]) 
		else
		  conf[3] = tk_tcl2ruby(conf[3]) 
		end
	      end
	      if conf[4]
		if conf[4].index('{')
		  conf[4] = tk_split_list(conf[4]) 
		else
		  conf[4] = tk_tcl2ruby(conf[4]) 
		end
	      end
	    end
	    conf[1] = conf[1][1..-1] if conf.size == 2 # alias info
	    conf
	  }
	  fontconf = ret.assoc('font')
	  if fontconf
	    ret.delete_if{|item| item[0] == 'font' || item[0] == 'kanjifont'}
	    fontconf[4] = fontobj(fontconf[4])
	    ret.push(fontconf)
	  else
	    ret
	  end
	end
      end
    else # ! TkComm::GET_CONFIGINFO_AS_ARRAY
      if slot == 'font' || slot == :font || 
	  slot == 'kanjifont' || slot == :kanjifont
	conf = tk_split_simplelist(_fromUTF8(tk_send_without_enc('configure', "-#{slot}")))
	key = conf.shift[1..-1]
	conf[3] = fontobj(conf[3])
	{ key => conf }
      else
	if slot
	  case slot.to_s
	  when 'text', 'label', 'show', 'data', 'file'
	    conf = tk_split_simplelist(_fromUTF8(tk_send_without_enc('configure', "-#{slot}")))
	  else
	    conf = tk_split_list(_fromUTF8(tk_send_without_enc('configure', "-#{slot}")))
	  end
	  key = conf.shift[1..-1]
	  { key => conf }
	else
	  ret = {}
	  tk_split_simplelist(_fromUTF8(tk_send_without_enc('configure'))).each{|conflist|
	    conf = tk_split_simplelist(conflist)
	    key = conf.shift[1..-1]
	    case key
	    when 'text', 'label', 'show', 'data', 'file'
	    else
	      if conf[2]
		if conf[2].index('{')
		  conf[2] = tk_split_list(conf[2]) 
		else
		  conf[2] = tk_tcl2ruby(conf[2]) 
		end
	      end
	      if conf[3]
		if conf[3].index('{')
		  conf[3] = tk_split_list(conf[3])
		else
		  conf[3] = tk_tcl2ruby(conf[3]) 
		end
	      end
	    end
	    if conf.size == 1
	      ret[key] = conf[0][1..-1]  # alias info
	    else
	      ret[key] = conf
	    end
	  }
	  fontconf = ret['font']
	  if fontconf
	    ret.delete('font')
	    ret.delete('kanjifont')
	    fontconf[3] = fontobj(fontconf[3])
	    ret['font'] = fontconf
	  end
	  ret
	end
      end
    end
  end

  def current_configinfo(slot = nil)
    if TkComm::GET_CONFIGINFO_AS_ARRAY
      if slot
	conf = configinfo(slot)
	{conf[0] => conf[4]}
      else
	ret = {}
	configinfo().each{|conf|
	  ret[conf[0]] = conf[4] if conf.size > 2
	}
	ret
      end
    else # ! TkComm::GET_CONFIGINFO_AS_ARRAY
      ret = {}
      configinfo(slot).each{|key, conf|	
	ret[key] = conf[-1] if conf.kind_of?(Array)
      }
      ret
    end
  end

  def event_generate(context, keys=nil)
    if keys
      #tk_call('event', 'generate', path, 
      #	      "<#{tk_event_sequence(context)}>", *hash_kv(keys))
      tk_call_without_enc('event', 'generate', path, 
			  "<#{tk_event_sequence(context)}>", 
			  *hash_kv(keys, true))
    else
      #tk_call('event', 'generate', path, "<#{tk_event_sequence(context)}>")
      tk_call_without_enc('event', 'generate', path, 
			  "<#{tk_event_sequence(context)}>")
    end
  end

  def tk_trace_variable(v)
    unless v.kind_of?(TkVariable)
      fail(ArgumentError, "type error (#{v.class}); must be TkVariable object")
    end
    v
  end
  private :tk_trace_variable

  def destroy
    tk_call 'trace', 'vdelete', @tk_vn, 'w', @var_id if @var_id
  end
end


class TkWindow<TkObject
  include TkWinfo
  extend TkBindCore

  WidgetClassName = ''.freeze
  def self.to_eval
    self::WidgetClassName
  end

  def initialize(parent=nil, keys=nil)
    if parent.kind_of? Hash
      keys = _symbolkey2str(parent)
      parent = keys.delete('parent')
      widgetname = keys.delete('widgetname')
      install_win(if parent then parent.path end, widgetname)
      without_creating = keys.delete('without_creating')
      if without_creating && !widgetname 
        fail ArgumentError, 
             "if set 'without_creating' to true, need to define 'widgetname'"
      end
    elsif keys
      keys = _symbolkey2str(keys)
      widgetname = keys.delete('widgetname')
      install_win(if parent then parent.path end, widgetname)
      without_creating = keys.delete('without_creating')
      if without_creating && !widgetname 
        fail ArgumentError, 
             "if set 'without_creating' to true, need to define 'widgetname'"
      end
    else
      install_win(if parent then parent.path end)
    end
    if self.method(:create_self).arity == 0
      p 'create_self has no arg' if $DEBUG
      create_self unless without_creating
      if keys
        # tk_call @path, 'configure', *hash_kv(keys)
        configure(keys)
      end
    else
      p 'create_self has args' if $DEBUG
      fontkeys = {}
      if keys
        ['font', 'kanjifont', 'latinfont', 'asciifont'].each{|key|
          fontkeys[key] = keys.delete(key) if keys.key?(key)
        }
      end
      if without_creating && keys
        configure(keys)
      else
        create_self(keys)
      end
      font_configure(fontkeys) unless fontkeys.empty?
    end
  end

  def create_self
    fail RuntimeError, "TkWindow is an abstract class"
  end
  private :create_self

  def exist?
    TkWinfo.exist?(self)
  end

  def bind_class
    @db_class || self.class()
  end

  def database_classname
    TkWinfo.classname(self)
  end
  def database_class
    name = database_classname()
    if WidgetClassNames[name]
      WidgetClassNames[name]
    else
      TkDatabaseClass.new(name)
    end
  end
  def self.database_classname
    self::WidgetClassName
  end
  def self.database_class
    WidgetClassNames[self::WidgetClassName]
  end

  def pack(keys = nil)
    #tk_call_without_enc('pack', epath, *hash_kv(keys, true))
    if keys
      TkPack.configure(self, keys)
    else
      TkPack.configure(self)
    end
    self
  end

  def pack_in(target, keys = nil)
    if keys
      keys = keys.dup
      keys['in'] = target
    else
      keys = {'in'=>target}
    end
    #tk_call 'pack', epath, *hash_kv(keys)
    TkPack.configure(self, keys)
    self
  end

  def pack_forget
    #tk_call_without_enc('pack', 'forget', epath)
    TkPack.forget(self)
    self
  end
  alias unpack pack_forget

  def pack_config(slot, value=None)
    #if slot.kind_of? Hash
    #  tk_call 'pack', 'configure', epath, *hash_kv(slot)
    #else
    #  tk_call 'pack', 'configure', epath, "-#{slot}", value
    #end
    if slot.kind_of? Hash
      TkPack.configure(self, slot)
    else
      TkPack.configure(self, slot=>value)
    end
  end

  def pack_info()
    #ilist = list(tk_call('pack', 'info', epath))
    #info = {}
    #while key = ilist.shift
    #  info[key[1..-1]] = ilist.shift
    #end
    #return info
    TkPack.info(self)
  end

  def pack_propagate(mode=None)
    #if mode == None
    #  bool(tk_call('pack', 'propagate', epath))
    #else
    #  tk_call('pack', 'propagate', epath, mode)
    #  self
    #end
    if mode == None
      TkPack.propagate(self)
    else
      TkPack.propagate(self, mode)
      self
    end
  end

  def pack_slaves()
    #list(tk_call('pack', 'slaves', epath))
    TkPack.slaves(self)
  end

  def grid(keys = nil)
    #tk_call 'grid', epath, *hash_kv(keys)
    if keys
      TkGrid.configure(self, keys)
    else
      TkGrid.configure(self)
    end
    self
  end

  def grid_in(target, keys = nil)
    if keys
      keys = keys.dup
      keys['in'] = target
    else
      keys = {'in'=>target}
    end
    #tk_call 'grid', epath, *hash_kv(keys)
    TkGrid.configure(self, keys)
    self
  end

  def  grid_forget
    #tk_call('grid', 'forget', epath)
    TkGrid.forget(self)
    self
  end
  alias ungrid grid_forget

  def grid_bbox(*args)
    #list(tk_call('grid', 'bbox', epath, *args))
    TkGrid.bbox(self, *args)
  end

  def grid_config(slot, value=None)
    #if slot.kind_of? Hash
    #  tk_call 'grid', 'configure', epath, *hash_kv(slot)
    #else
    #  tk_call 'grid', 'configure', epath, "-#{slot}", value
    #end
    if slot.kind_of? Hash
      TkGrid.configure(self, slot)
    else
      TkGrid.configure(self, slot=>value)
    end
  end

  def grid_columnconfig(index, keys)
    #tk_call('grid', 'columnconfigure', epath, index, *hash_kv(keys))
    TkGrid.columnconfigure(self, index, keys)
  end
  alias grid_columnconfigure grid_columnconfig

  def grid_rowconfig(index, keys)
    #tk_call('grid', 'rowconfigure', epath, index, *hash_kv(keys))
    TkGrid.rowconfigure(self, index, keys)
  end
  alias grid_rowconfigure grid_rowconfig

  def grid_columnconfiginfo(index, slot=nil)
    #if slot
    #  tk_call('grid', 'columnconfigure', epath, index, "-#{slot}").to_i
    #else
    #  ilist = list(tk_call('grid', 'columnconfigure', epath, index))
    #  info = {}
    #  while key = ilist.shift
    #	info[key[1..-1]] = ilist.shift
    #  end
    #  info
    #end
    TkGrid.columnconfiginfo(self, index, slot)
  end

  def grid_rowconfiginfo(index, slot=nil)
    #if slot
    #  tk_call('grid', 'rowconfigure', epath, index, "-#{slot}").to_i
    #else
    #  ilist = list(tk_call('grid', 'rowconfigure', epath, index))
    #  info = {}
    #  while key = ilist.shift
    #	info[key[1..-1]] = ilist.shift
    #  end
    #  info
    #end
    TkGrid.rowconfiginfo(self, index, slot)
  end

  def grid_info()
    #list(tk_call('grid', 'info', epath))
    TkGrid.info(self)
  end

  def grid_location(x, y)
    #list(tk_call('grid', 'location', epath, x, y))
    TkGrid.location(self, x, y)
  end

  def grid_propagate(mode=None)
    #if mode == None
    #  bool(tk_call('grid', 'propagate', epath))
    #else
    #  tk_call('grid', 'propagate', epath, mode)
    #  self
    #end
    if mode == None
      TkGrid.propagete(self)
    else
      TkGrid.propagete(self, mode)
      self
    end
  end

  def grid_remove()
    #tk_call 'grid', 'remove', epath
    TkGrid.remove(self)
    self
  end

  def grid_size()
    #list(tk_call('grid', 'size', epath))
    TkGrid.size(self)
  end

  def grid_slaves(args)
    #list(tk_call('grid', 'slaves', epath, *hash_kv(args)))
    TkGrid.slaves(self, args)
  end

  def place(keys)
    #tk_call 'place', epath, *hash_kv(keys)
    TkPlace.configure(self, keys)
    self
  end

  def place_in(target, keys = nil)
    if keys
      keys = keys.dup
      keys['in'] = target
    else
      keys = {'in'=>target}
    end
    #tk_call 'place', epath, *hash_kv(keys)
    TkPlace.configure(self, keys)
    self
  end

  def  place_forget
    #tk_call 'place', 'forget', epath
    TkPlace.forget(self)
    self
  end
  alias unplace place_forget

  def place_config(slot, value=None)
    #if slot.kind_of? Hash
    #  tk_call 'place', 'configure', epath, *hash_kv(slot)
    #else
    #  tk_call 'place', 'configure', epath, "-#{slot}", value
    #end
    TkPlace.configure(self, slot, value)
  end

  def place_configinfo(slot = nil)
    # for >= Tk8.4a2 ?
    #if slot
    #  conf = tk_split_list(tk_call('place', 'configure', epath, "-#{slot}") )
    #  conf[0] = conf[0][1..-1]
    #  conf
    #else
    #  tk_split_simplelist(tk_call('place', 
    #				  'configure', epath)).collect{|conflist|
    #	conf = tk_split_simplelist(conflist)
    #	conf[0] = conf[0][1..-1]
    #	conf
    #  }
    #end
    TkPlace.configinfo(slot)
  end

  def place_info()
    #ilist = list(tk_call('place', 'info', epath))
    #info = {}
    #while key = ilist.shift
    #  info[key[1..-1]] = ilist.shift
    #end
    #return info
    TkPlace.info(self)
  end

  def place_slaves()
    #list(tk_call('place', 'slaves', epath))
    TkPlace.slaves(self)
  end

  def set_focus(force=false)
    if force
      tk_call_without_enc('focus', '-force', path)
    else
      tk_call_without_enc('focus', path)
    end
    self
  end
  alias focus set_focus

  def grab(opt = nil)
    unless opt
      tk_call_without_enc('grab', 'set', path)
      return self
    end

    case opt
    when 'global', :global
      #return(tk_call('grab', 'set', '-global', path))
      tk_call_without_enc('grab', 'set', '-global', path)
      return self
    when 'release', :release
      #return tk_call('grab', 'release', path)
      tk_call_without_enc('grab', 'release', path)
      return self
    when 'current', :current
      return window(tk_call_without_enc('grab', 'current', path))
    when 'status', :status
      return tk_call_without_enc('grab', 'status', path)
    else
      return tk_call_without_enc('grab', args[0], path)
    end
  end

  def grab_current
    grab('current')
  end
  def grab_release
    grab('release')
  end
  def grab_set
    grab('set')
  end
  def grab_set_global
    grab('global')
  end
  def grab_status
    grab('status')
  end

  def lower(below=None)
    # below = below.epath if below.kind_of?(TkObject)
    below = _epath(below)
    tk_call 'lower', epath, below
    self
  end
  def raise(above=None)
    #above = above.epath if above.kind_of?(TkObject)
    above = _epath(above)
    tk_call 'raise', epath, above
    self
  end

  def command(cmd=nil, &b)
    if cmd
      configure_cmd('command', cmd)
    elsif b
      configure_cmd('command', Proc.new(&b))
    else
      cget('command')
    end
  end

  def colormodel(model=None)
    tk_call('tk', 'colormodel', path, model)
    self
  end

  def caret(keys=nil)
    TkXIM.caret(path, keys)
  end

  def destroy
    super
    children = []
    rexp = /^#{self.path}\.[^.]+$/
    TkCore::INTERP.tk_windows.each{|path, obj|
      children << [path, obj] if path =~ rexp
    }
    if defined?(@cmdtbl)
      for id in @cmdtbl
	uninstall_cmd id
      end
    end

    children.each{|path, obj|
      if defined?(@cmdtbl)
	for id in @cmdtbl
	  uninstall_cmd id
	end
      end
      TkCore::INTERP.tk_windows.delete(path)
    }

    begin
      tk_call_without_enc('destroy', epath)
    rescue
    end
    uninstall_win
  end

  def wait_visibility(on_thread = true)
    if $SAFE >= 4
      fail SecurityError, "can't wait visibility at $SAFE >= 4"
    end
    on_thread &= (Thread.list.size != 1)
    if on_thread
      INTERP._thread_tkwait('visibility', path)
    else
      INTERP._invoke('tkwait', 'visibility', path)
    end
  end
  def eventloop_wait_visibility
    wait_visibility(false)
  end
  def thread_wait_visibility
    wait_visibility(true)
  end
  alias wait wait_visibility
  alias tkwait wait_visibility
  alias eventloop_wait eventloop_wait_visibility
  alias eventloop_tkwait eventloop_wait_visibility
  alias eventloop_tkwait_visibility eventloop_wait_visibility
  alias thread_wait thread_wait_visibility
  alias thread_tkwait thread_wait_visibility
  alias thread_tkwait_visibility thread_wait_visibility

  def wait_destroy(on_thread = true)
    if $SAFE >= 4
      fail SecurityError, "can't wait destroy at $SAFE >= 4"
    end
    on_thread &= (Thread.list.size != 1)
    if on_thread
      INTERP._thread_tkwait('window', epath)
    else
      INTERP._invoke('tkwait', 'window', epath)
    end
  end
  def eventloop_wait_destroy
    wait_destroy(false)
  end
  def thread_wait_destroy
    wait_destroy(true)
  end
  alias tkwait_destroy wait_destroy
  alias eventloop_tkwait_destroy eventloop_wait_destroy
  alias thread_tkwait_destroy thread_wait_destroy

  def bindtags(taglist=nil)
    if taglist
      fail ArgumentError, "taglist must be Array" unless taglist.kind_of? Array
      tk_call('bindtags', path, taglist)
      taglist
    else
      list(tk_call('bindtags', path)).collect{|tag|
	if tag.kind_of?(String) 
	  if cls = WidgetClassNames[tag]
	    cls
	  elsif btag = TkBindTag.id2obj(tag)
	    btag
	  else
	    tag
	  end
	else
	  tag
	end
      }
    end
  end

  def bindtags=(taglist)
    bindtags(taglist)
    taglist
  end

  def bindtags_shift
    taglist = bindtags
    tag = taglist.shift
    bindtags(taglist)
    tag
  end

  def bindtags_unshift(tag)
    bindtags(bindtags().unshift(tag))
  end
end


# freeze core modules
#TclTkLib.freeze
#TclTkIp.freeze
#TkUtil.freeze
#TkKernel.freeze
#TkComm.freeze
#TkComm::Event.freeze
#TkCore.freeze
#Tk.freeze

module Tk
  autoload :AUTO_PATH,        'tk/variable'
  autoload :TCL_PACKAGE_PATH, 'tk/variable'
  autoload :PACKAGE_PATH,     'tk/variable'
  autoload :TCL_LIBRARY_PATH, 'tk/variable'
  autoload :LIBRARY_PATH,     'tk/variable'
  autoload :TCL_PRECISION,    'tk/variable'
end