From 0dc342de848a642ecce8db697b8fecd83a63e117 Mon Sep 17 00:00:00 2001
From: yugui <yugui@b2dd03c8-39d4-4d8f-98ff-823fe69b080e>
Date: Mon, 25 Aug 2008 15:02:05 +0000
Subject: added tag v1_9_0_4

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/tags/v1_9_0_4@18845 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
---
 trunk/ext/tk/lib/tk/canvas.rb | 789 ++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 789 insertions(+)
 create mode 100644 trunk/ext/tk/lib/tk/canvas.rb

(limited to 'trunk/ext/tk/lib/tk/canvas.rb')

diff --git a/trunk/ext/tk/lib/tk/canvas.rb b/trunk/ext/tk/lib/tk/canvas.rb
new file mode 100644
index 0000000000..36ea008a17
--- /dev/null
+++ b/trunk/ext/tk/lib/tk/canvas.rb
@@ -0,0 +1,789 @@
+#
+#               tk/canvas.rb - Tk canvas classes
+#                       by Yukihiro Matsumoto <matz@caelum.co.jp>
+#
+require 'tk'
+require 'tk/canvastag'
+require 'tk/itemconfig'
+require 'tk/scrollable'
+
+module TkCanvasItemConfig
+  include TkItemConfigMethod
+
+  def __item_strval_optkeys(id)
+    # maybe need to override
+    super(id) + [
+      'fill', 'activefill', 'disabledfill', 
+      'outline', 'activeoutline', 'disabledoutline'
+    ]
+  end
+  private :__item_strval_optkeys
+
+  def __item_methodcall_optkeys(id)
+    {'coords'=>'coords'}
+  end
+  private :__item_methodcall_optkeys
+
+  def __item_val2ruby_optkeys(id)  # { key=>proc, ... }
+    super(id).update('window'=>proc{|i, v| window(v)})
+  end
+  private :__item_val2ruby_optkeys
+
+  def __item_pathname(tagOrId)
+    if tagOrId.kind_of?(TkcItem) || tagOrId.kind_of?(TkcTag)
+      self.path + ';' + tagOrId.id.to_s
+    else
+      self.path + ';' + tagOrId.to_s
+    end
+  end
+  private :__item_pathname
+end
+
+class Tk::Canvas<TkWindow
+  include TkCanvasItemConfig
+  include Tk::Scrollable
+
+  TkCommandNames = ['canvas'.freeze].freeze
+  WidgetClassName = 'Canvas'.freeze
+  WidgetClassNames[WidgetClassName] = self
+
+  def __destroy_hook__
+    TkcItem::CItemID_TBL.delete(@path)
+  end
+
+  #def create_self(keys)
+  #  if keys and keys != None
+  #    tk_call_without_enc('canvas', @path, *hash_kv(keys, true))
+  #  else
+  #    tk_call_without_enc('canvas', @path)
+  #  end
+  #end
+  #private :create_self
+
+  def __numval_optkeys
+    super() + ['closeenough']
+  end
+  private :__numval_optkeys
+
+  def __boolval_optkeys
+    super() + ['confine']
+  end
+  private :__boolval_optkeys
+
+  def tagid(tag)
+    if tag.kind_of?(TkcItem) || tag.kind_of?(TkcTag)
+      tag.id
+    else
+      tag  # maybe an Array of configure paramters
+    end
+  end
+  private :tagid
+
+
+  # create a canvas item without creating a TkcItem object
+  def create(type, *args)
+    type.create(self, *args)
+  end
+
+
+  def addtag(tag, mode, *args)
+    mode = mode.to_s
+    if args[0] && mode =~ /^(above|below|with(tag)?)$/
+      args[0] = tagid(args[0])
+    end
+    tk_send_without_enc('addtag', tagid(tag), mode, *args)
+    self
+  end
+  def addtag_above(tagOrId, target)
+    addtag(tagOrId, 'above', tagid(target))
+  end
+  def addtag_all(tagOrId)
+    addtag(tagOrId, 'all')
+  end
+  def addtag_below(tagOrId, target)
+    addtag(tagOrId, 'below', tagid(target))
+  end
+  def addtag_closest(tagOrId, x, y, halo=None, start=None)
+    addtag(tagOrId, 'closest', x, y, halo, start)
+  end
+  def addtag_enclosed(tagOrId, x1, y1, x2, y2)
+    addtag(tagOrId, 'enclosed', x1, y1, x2, y2)
+  end
+  def addtag_overlapping(tagOrId, x1, y1, x2, y2)
+    addtag(tagOrId, 'overlapping', x1, y1, x2, y2)
+  end
+  def addtag_withtag(tagOrId, tag)
+    addtag(tagOrId, 'withtag', tagid(tag))
+  end
+
+  def bbox(tagOrId, *tags)
+    list(tk_send_without_enc('bbox', tagid(tagOrId), 
+                             *tags.collect{|t| tagid(t)}))
+  end
+
+  #def itembind(tag, context, cmd=Proc.new, *args)
+  #  _bind([path, "bind", tagid(tag)], context, cmd, *args)
+  #  self
+  #end
+  def itembind(tag, context, *args)
+    # if args[0].kind_of?(Proc) || args[0].kind_of?(Method)
+    if TkComm._callback_entry?(args[0]) || !block_given?
+      cmd = args.shift
+    else
+      cmd = Proc.new
+    end
+    _bind([path, "bind", tagid(tag)], context, cmd, *args)
+    self
+  end
+
+  #def itembind_append(tag, context, cmd=Proc.new, *args)
+  #  _bind_append([path, "bind", tagid(tag)], context, cmd, *args)
+  #  self
+  #end
+  def itembind_append(tag, context, *args)
+    # if args[0].kind_of?(Proc) || args[0].kind_of?(Method)
+    if TkComm._callback_entry?(args[0]) || !block_given?
+      cmd = args.shift
+    else
+      cmd = Proc.new
+    end
+    _bind_append([path, "bind", tagid(tag)], context, cmd, *args)
+    self
+  end
+
+  def itembind_remove(tag, context)
+    _bind_remove([path, "bind", tagid(tag)], context)
+    self
+  end
+
+  def itembindinfo(tag, context=nil)
+    _bindinfo([path, "bind", tagid(tag)], context)
+  end
+
+  def canvasx(screen_x, *args)
+    #tk_tcl2ruby(tk_send_without_enc('canvasx', screen_x, *args))
+    number(tk_send_without_enc('canvasx', screen_x, *args))
+  end
+  def canvasy(screen_y, *args)
+    #tk_tcl2ruby(tk_send_without_enc('canvasy', screen_y, *args))
+    number(tk_send_without_enc('canvasy', screen_y, *args))
+  end
+  alias canvas_x canvasx
+  alias canvas_y canvasy
+
+  def coords(tag, *args)
+    if args == []
+      tk_split_list(tk_send_without_enc('coords', tagid(tag)))
+    else
+      tk_send_without_enc('coords', tagid(tag), *(args.flatten))
+      self
+    end
+  end
+
+  def dchars(tag, first, last=None)
+    tk_send_without_enc('dchars', tagid(tag), 
+                        _get_eval_enc_str(first), _get_eval_enc_str(last))
+    self
+  end
+
+  def delete(*args)
+    tbl = nil
+    TkcItem::CItemID_TBL.mutex.synchronize{
+      tbl = TkcItem::CItemID_TBL[self.path]
+    }
+    if tbl
+      args.each{|tag|
+        find('withtag', tag).each{|item|
+          if item.kind_of?(TkcItem)
+            TkcItem::CItemID_TBL.mutex.synchronize{
+              tbl.delete(item.id)
+            }
+          end
+        }
+      }
+    end
+    tk_send_without_enc('delete', *args.collect{|t| tagid(t)})
+    self
+  end
+  alias remove delete
+
+  def dtag(tag, tag_to_del=None)
+    tk_send_without_enc('dtag', tagid(tag), tagid(tag_to_del))
+    self
+  end
+  alias deltag dtag
+
+  def find(mode, *args)
+    list(tk_send_without_enc('find', mode, *args)).collect!{|id| 
+      TkcItem.id2obj(self, id)
+    }
+  end
+  def find_above(target)
+    find('above', tagid(target))
+  end
+  def find_all
+    find('all')
+  end
+  def find_below(target)
+    find('below', tagid(target))
+  end
+  def find_closest(x, y, halo=None, start=None)
+    find('closest', x, y, halo, start)
+  end
+  def find_enclosed(x1, y1, x2, y2)
+    find('enclosed', x1, y1, x2, y2)
+  end
+  def find_overlapping(x1, y1, x2, y2)
+    find('overlapping', x1, y1, x2, y2)
+  end
+  def find_withtag(tag)
+    find('withtag', tag)
+  end
+
+  def itemfocus(tagOrId=nil)
+    if tagOrId
+      tk_send_without_enc('focus', tagid(tagOrId))
+      self
+    else
+      ret = tk_send_without_enc('focus')
+      if ret == ""
+        nil
+      else
+        TkcItem.id2obj(self, ret)
+      end
+    end
+  end
+
+  def gettags(tagOrId)
+    list(tk_send_without_enc('gettags', tagid(tagOrId))).collect{|tag|
+      TkcTag.id2obj(self, tag)
+    }
+  end
+
+  def icursor(tagOrId, index)
+    tk_send_without_enc('icursor', tagid(tagOrId), index)
+    self
+  end
+
+  def index(tagOrId, idx)
+    number(tk_send_without_enc('index', tagid(tagOrId), idx))
+  end
+
+  def insert(tagOrId, index, string)
+    tk_send_without_enc('insert', tagid(tagOrId), index, 
+                        _get_eval_enc_str(string))
+    self
+  end
+
+=begin
+  def itemcget(tagOrId, option)
+    case option.to_s
+    when 'dash', 'activedash', 'disableddash'
+      conf = tk_send_without_enc('itemcget', tagid(tagOrId), "-#{option}")
+      if conf =~ /^[0-9]/
+        list(conf)
+      else
+        conf
+      end
+    when 'text', 'label', 'show', 'data', 'file', 'maskdata', 'maskfile'
+      _fromUTF8(tk_send_without_enc('itemcget', tagid(tagOrId), "-#{option}"))
+    when 'font', 'kanjifont'
+      #fnt = tk_tcl2ruby(tk_send('itemcget', tagid(tagOrId), "-#{option}"))
+      fnt = tk_tcl2ruby(_fromUTF8(tk_send_with_enc('itemcget', tagid(tagOrId), '-font')))
+      unless fnt.kind_of?(TkFont)
+        fnt = tagfontobj(tagid(tagOrId), fnt)
+      end
+      if option.to_s == 'kanjifont' && JAPANIZED_TK && TK_VERSION =~ /^4\.*/
+        # obsolete; just for compatibility
+        fnt.kanji_font
+      else
+        fnt
+      end
+    else
+      tk_tcl2ruby(_fromUTF8(tk_send_without_enc('itemcget', tagid(tagOrId), 
+                                                "-#{option}")))
+    end
+  end
+
+  def itemconfigure(tagOrId, key, value=None)
+    if key.kind_of? Hash
+      key = _symbolkey2str(key)
+      coords = key.delete('coords')
+      self.coords(tagOrId, coords) if coords
+
+      if ( key['font'] || key['kanjifont'] \
+          || key['latinfont'] || key['asciifont'] )
+        tagfont_configure(tagid(tagOrId), key.dup)
+      else
+        _fromUTF8(tk_send_without_enc('itemconfigure', tagid(tagOrId), 
+                                      *hash_kv(key, true)))
+      end
+
+    else
+      if ( key == 'coords' || key == :coords )
+        self.coords(tagOrId, value)
+      elsif ( key == 'font' || key == :font || 
+              key == 'kanjifont' || key == :kanjifont || 
+              key == 'latinfont' || key == :latinfont || 
+              key == 'asciifont' || key == :asciifont )
+        if value == None
+          tagfontobj(tagid(tagOrId))
+        else
+          tagfont_configure(tagid(tagOrId), {key=>value})
+        end
+      else
+        _fromUTF8(tk_send_without_enc('itemconfigure', tagid(tagOrId), 
+                                      "-#{key}", _get_eval_enc_str(value)))
+      end
+    end
+    self
+  end
+#  def itemconfigure(tagOrId, key, value=None)
+#    if key.kind_of? Hash
+#      tk_send 'itemconfigure', tagid(tagOrId), *hash_kv(key)
+#    else
+#      tk_send 'itemconfigure', tagid(tagOrId), "-#{key}", value
+#    end
+#  end
+#  def itemconfigure(tagOrId, keys)
+#    tk_send 'itemconfigure', tagid(tagOrId), *hash_kv(keys)
+#  end
+
+  def itemconfiginfo(tagOrId, key=nil)
+    if TkComm::GET_CONFIGINFO_AS_ARRAY
+      if key
+        case key.to_s
+        when 'coords'
+          return ['coords', '', '', '', self.coords(tagOrId)]
+        when 'dash', 'activedash', 'disableddash'
+          conf = tk_split_simplelist(tk_send_without_enc('itemconfigure', tagid(tagOrId), "-#{key}"))
+          if conf[3] && conf[3] =~ /^[0-9]/
+            conf[3] = list(conf[3])
+          end
+          if conf[4] && conf[4] =~ /^[0-9]/
+            conf[4] = list(conf[4])
+          end
+        when 'text', 'label', 'show', 'data', 'file', 'maskdata', 'maskfile'
+          conf = tk_split_simplelist(_fromUTF8(tk_send_without_enc('itemconfigure', tagid(tagOrId), "-#{key}")))
+        when 'font', 'kanjifont'
+          conf = tk_split_simplelist(_fromUTF8(tk_send_without_enc('itemconfigure', tagid(tagOrId),"-#{key}")))
+          conf[4] = tagfont_configinfo(tagid(tagOrId), conf[4])
+        else
+          conf = tk_split_list(_fromUTF8(tk_send_without_enc('itemconfigure', tagid(tagOrId), "-#{key}")))
+        end
+        conf[0] = conf[0][1..-1]
+        conf
+      else
+        ret = tk_split_simplelist(_fromUTF8(tk_send_without_enc('itemconfigure', tagid(tagOrId)))).collect{|conflist|
+          conf = tk_split_simplelist(conflist)
+          conf[0] = conf[0][1..-1]
+          case conf[0]
+          when 'text', 'label', 'show', 'data', 'file', 'maskdata', 'maskfile'
+          when 'dash', 'activedash', 'disableddash'
+            if conf[3] && conf[3] =~ /^[0-9]/
+              conf[3] = list(conf[3])
+            end
+            if conf[4] && conf[4] =~ /^[0-9]/
+              conf[4] = list(conf[4])
+            end
+          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] = tagfont_configinfo(tagid(tagOrId), fontconf[4])
+          ret.push(fontconf)
+        end
+
+        ret << ['coords', '', '', '', self.coords(tagOrId)]
+      end
+    else # ! TkComm::GET_CONFIGINFO_AS_ARRAY
+      if key
+        case key.to_s
+        when 'coords'
+          {'coords' => ['', '', '', self.coords(tagOrId)]}
+        when 'dash', 'activedash', 'disableddash'
+          conf = tk_split_simplelist(tk_send_without_enc('itemconfigure', 
+                                                         tagid(tagOrId), 
+                                                         "-#{key}"))
+          if conf[3] && conf[3] =~ /^[0-9]/
+            conf[3] = list(conf[3])
+          end
+          if conf[4] && conf[4] =~ /^[0-9]/
+            conf[4] = list(conf[4])
+          end
+        when 'text', 'label', 'show', 'data', 'file', 'maskdata', 'maskfile'
+          conf = tk_split_simplelist(_fromUTF8(tk_send_without_enc('itemconfigure', tagid(tagOrId), "-#{key}")))
+        when 'font', 'kanjifont'
+          conf = tk_split_simplelist(_fromUTF8(tk_send_without_enc('itemconfigure', tagid(tagOrId),"-#{key}")))
+          conf[4] = tagfont_configinfo(tagid(tagOrId), conf[4])
+        else
+          conf = tk_split_list(_fromUTF8(tk_send_without_enc('itemconfigure', tagid(tagOrId), "-#{key}")))
+        end
+        key = conf.shift[1..-1]
+        { key => conf }
+      else
+        ret = {}
+        tk_split_simplelist(_fromUTF8(tk_send_without_enc('itemconfigure', tagid(tagOrId)))).each{|conflist|
+          conf = tk_split_simplelist(conflist)
+          key = conf.shift[1..-1]
+          case key
+          when 'text', 'label', 'show', 'data', 'file', 'maskdata', 'maskfile'
+          when 'dash', 'activedash', 'disableddash'
+            if conf[2] && conf[2] =~ /^[0-9]/
+              conf[2] = list(conf[2])
+            end
+            if conf[3] && conf[3] =~ /^[0-9]/
+              conf[3] = list(conf[3])
+            end
+          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] = tagfont_configinfo(tagid(tagOrId), fontconf[3])
+          ret['font'] = fontconf
+        end
+
+        ret['coords'] = ['', '', '', self.coords(tagOrId)]
+
+        ret
+      end
+    end
+  end
+
+  def current_itemconfiginfo(tagOrId, key=nil)
+    if TkComm::GET_CONFIGINFO_AS_ARRAY
+      if key
+        conf = itemconfiginfo(tagOrId, key)
+        {conf[0] => conf[4]}
+      else
+        ret = {}
+        itemconfiginfo(tagOrId).each{|conf|
+          ret[conf[0]] = conf[4] if conf.size > 2
+        }
+        ret
+      end
+    else # ! TkComm::GET_CONFIGINFO_AS_ARRAY
+      ret = {}
+      itemconfiginfo(tagOrId, key).each{|k, conf|
+        ret[k] = conf[-1] if conf.kind_of?(Array)
+      }
+      ret
+    end
+  end
+=end
+
+  def lower(tag, below=nil)
+    if below
+      tk_send_without_enc('lower', tagid(tag), tagid(below))
+    else
+      tk_send_without_enc('lower', tagid(tag))
+    end
+    self
+  end
+
+  def move(tag, x, y)
+    tk_send_without_enc('move', tagid(tag), x, y)
+    self
+  end
+
+  def postscript(keys)
+    tk_send("postscript", *hash_kv(keys))
+  end
+
+  def raise(tag, above=nil)
+    if above
+      tk_send_without_enc('raise', tagid(tag), tagid(above))
+    else
+      tk_send_without_enc('raise', tagid(tag))
+    end
+    self
+  end
+
+  def scale(tag, x, y, xs, ys)
+    tk_send_without_enc('scale', tagid(tag), x, y, xs, ys)
+    self
+  end
+
+  def scan_mark(x, y)
+    tk_send_without_enc('scan', 'mark', x, y)
+    self
+  end
+  def scan_dragto(x, y, gain=None)
+    tk_send_without_enc('scan', 'dragto', x, y, gain)
+    self
+  end
+
+  def select(mode, *args)
+    r = tk_send_without_enc('select', mode, *args)
+    (mode == 'item')? TkcItem.id2obj(self, r): self
+  end
+  def select_adjust(tagOrId, index)
+    select('adjust', tagid(tagOrId), index)
+  end
+  def select_clear
+    select('clear')
+  end
+  def select_from(tagOrId, index)
+    select('from', tagid(tagOrId), index)
+  end
+  def select_item
+    select('item')
+  end
+  def select_to(tagOrId, index)
+    select('to', tagid(tagOrId), index)
+  end
+
+  def itemtype(tag)
+    TkcItem.type2class(tk_send('type', tagid(tag)))
+  end
+end
+
+#TkCanvas = Tk::Canvas unless Object.const_defined? :TkCanvas
+Tk.__set_toplevel_aliases__(:Tk, Tk::Canvas, :TkCanvas)
+
+
+class TkcItem<TkObject
+  extend Tk
+  include TkcTagAccess
+  extend TkItemFontOptkeys
+  extend TkItemConfigOptkeys
+
+  CItemTypeName = nil
+  CItemTypeToClass = {}
+
+  CItemID_TBL = TkCore::INTERP.create_table
+
+  TkCore::INTERP.init_ip_env{
+    CItemID_TBL.mutex.synchronize{ CItemID_TBL.clear }
+  }
+
+  def TkcItem.type2class(type)
+    CItemTypeToClass[type]
+  end
+
+  def TkcItem.id2obj(canvas, id)
+    cpath = canvas.path
+    CItemID_TBL.mutex.synchronize{
+      if CItemID_TBL[cpath]
+        CItemID_TBL[cpath][id]? CItemID_TBL[cpath][id]: id
+      else
+        id
+      end
+    }
+  end
+
+  ########################################
+  def self._parse_create_args(args)
+    fontkeys = {}
+    methodkeys = {}
+    if args[-1].kind_of? Hash
+      keys = _symbolkey2str(args.pop)
+      if args.size == 0
+        args = keys.delete('coords')
+        unless args.kind_of?(Array)
+          fail "coords parameter must be given by an Array"
+        end
+      end
+
+      #['font', 'kanjifont', 'latinfont', 'asciifont'].each{|key|
+      #  fontkeys[key] = keys.delete(key) if keys.key?(key)
+      #}
+      __item_font_optkeys(nil).each{|key|
+        fkey = key.to_s
+        fontkeys[fkey] = keys.delete(fkey) if keys.key?(fkey)
+
+        fkey = "kanji#{key}"
+        fontkeys[fkey] = keys.delete(fkey) if keys.key?(fkey)
+
+        fkey = "latin#{key}"
+        fontkeys[fkey] = keys.delete(fkey) if keys.key?(fkey)
+
+        fkey = "ascii#{key}"
+        fontkeys[fkey] = keys.delete(fkey) if keys.key?(fkey)
+      }
+
+      __item_optkey_aliases(nil).each{|alias_name, real_name|
+        alias_name = alias_name.to_s
+        if keys.has_key?(alias_name)
+          keys[real_name.to_s] = keys.delete(alias_name)
+        end
+      }
+
+      __item_methodcall_optkeys(nil).each{|key|
+        key = key.to_s
+        methodkeys[key] = keys.delete(key) if keys.key?(key)
+      }
+
+      __item_ruby2val_optkeys(nil).each{|key, method|
+        key = key.to_s
+        keys[key] = method.call(keys[key]) if keys.has_key?(key)
+      }
+
+      #args = args.flatten.concat(hash_kv(keys))
+      args = args.flatten.concat(itemconfig_hash_kv(nil, keys))
+    else
+      args = args.flatten
+    end
+
+    [args, fontkeys]
+  end
+  private_class_method :_parse_create_args
+
+  def self.create(canvas, *args)
+    unless self::CItemTypeName
+      fail RuntimeError, "#{self} is an abstract class"
+    end
+    args, fontkeys = _parse_create_args(args)
+    idnum = tk_call_without_enc(canvas.path, 'create', 
+                                self::CItemTypeName, *args)
+    canvas.itemconfigure(idnum, fontkeys) unless fontkeys.empty?
+    idnum.to_i  # 'canvas item id' is an integer number
+  end
+  ########################################
+
+  def initialize(parent, *args)
+    #unless parent.kind_of?(Tk::Canvas)
+    #  fail ArgumentError, "expect Tk::Canvas for 1st argument"
+    #end
+    @parent = @c = parent
+    @path = parent.path
+
+    @id = create_self(*args) # an integer number as 'canvas item id'
+    CItemID_TBL.mutex.synchronize{
+      CItemID_TBL[@path] = {} unless CItemID_TBL[@path]
+      CItemID_TBL[@path][@id] = self
+    }
+  end
+  def create_self(*args)
+    self.class.create(@c, *args) # return an integer number as 'canvas item id'
+  end
+  private :create_self
+
+  def id
+    @id
+  end
+
+  def exist?
+    if @c.find_withtag(@id)
+      true
+    else
+      false
+    end
+  end
+
+  def delete
+    @c.delete @id
+    CItemID_TBL.mutex.synchronize{
+      CItemID_TBL[@path].delete(@id) if CItemID_TBL[@path]
+    }
+    self
+  end
+  alias remove  delete
+  alias destroy delete
+end
+
+class TkcArc<TkcItem
+  CItemTypeName = 'arc'.freeze
+  CItemTypeToClass[CItemTypeName] = self
+end
+
+class TkcBitmap<TkcItem
+  CItemTypeName = 'bitmap'.freeze
+  CItemTypeToClass[CItemTypeName] = self
+end
+
+class TkcImage<TkcItem
+  CItemTypeName = 'image'.freeze
+  CItemTypeToClass[CItemTypeName] = self
+end
+
+class TkcLine<TkcItem
+  CItemTypeName = 'line'.freeze
+  CItemTypeToClass[CItemTypeName] = self
+end
+
+class TkcOval<TkcItem
+  CItemTypeName = 'oval'.freeze
+  CItemTypeToClass[CItemTypeName] = self
+end
+
+class TkcPolygon<TkcItem
+  CItemTypeName = 'polygon'.freeze
+  CItemTypeToClass[CItemTypeName] = self
+end
+
+class TkcRectangle<TkcItem
+  CItemTypeName = 'rectangle'.freeze
+  CItemTypeToClass[CItemTypeName] = self
+end
+
+class TkcText<TkcItem
+  CItemTypeName = 'text'.freeze
+  CItemTypeToClass[CItemTypeName] = self
+  def self.create(canvas, *args)
+    if args[-1].kind_of?(Hash)
+      keys = _symbolkey2str(args.pop)
+      txt = keys['text']
+      keys['text'] = _get_eval_enc_str(txt) if txt
+      args.push(keys)
+    end
+    super(canvas, *args)
+  end
+end
+
+class TkcWindow<TkcItem
+  CItemTypeName = 'window'.freeze
+  CItemTypeToClass[CItemTypeName] = self
+  def self.create(canvas, *args)
+    if args[-1].kind_of?(Hash)
+      keys = _symbolkey2str(args.pop)
+      win = keys['window']
+      # keys['window'] = win.epath if win.kind_of?(TkWindow)
+      keys['window'] = _epath(win) if win
+      args.push(keys)
+    end
+    super(canvas, *args)
+  end
+end
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