#
# tk/textimage.rb - treat Tk text image object
#
require 'tk'
require 'tk/text'

class TkTextImage<TkObject
  include TkText::IndexModMethods

  def initialize(parent, index, keys)
    #unless parent.kind_of?(TkText)
    #  fail ArguemntError, "expect TkText for 1st argument"
    #end
    @t = parent
    if index == 'end' || index == :end
      @path = TkTextMark.new(@t, tk_call(@t.path, 'index', 'end - 1 chars'))
    elsif index.kind_of? TkTextMark
      if tk_call_without_enc(@t.path,'index',index.path) == tk_call_without_enc(@t.path,'index','end')
        @path = TkTextMark.new(@t, tk_call_without_enc(@t.path, 'index', 
                                                       'end - 1 chars'))
      else
        @path = TkTextMark.new(@t, tk_call_without_enc(@t.path, 'index', 
                                                       index.path))
      end
    else
      @path = TkTextMark.new(@t, tk_call_without_enc(@t.path, 'index', 
                                                     _get_eval_enc_str(index)))
    end
    @path.gravity = 'left'
    @index = @path.path
    @id = tk_call_without_enc(@t.path, 'image', 'create', @index, 
                              *hash_kv(keys, true)).freeze
    @path.gravity = 'right'
  end

  def id
    TkText::IndexString.new(@id)
  end
  def mark
    @path
  end

  def [](slot)
    cget(slot)
  end
  def []=(slot, value)
    configure(slot, value)
    value
  end

  def cget(slot)
    @t.image_cget(@index, slot)
  end

  def configure(slot, value=None)
    @t.image_configure(@index, slot, value)
    self
  end
#  def configure(slot, value)
#    tk_call @t.path, 'image', 'configure', @index, "-#{slot}", value
#  end

  def configinfo(slot = nil)
    @t.image_configinfo(@index, slot)
  end

  def current_configinfo(slot = nil)
    @t.current_image_configinfo(@index, slot)
  end

  def image
    img = tk_call_without_enc(@t.path, 'image', 'cget', @index, '-image')
    TkImage::Tk_IMGTBL[img]? TkImage::Tk_IMGTBL[img] : img
  end

  def image=(value)
    tk_call_without_enc(@t.path, 'image', 'configure', @index, '-image', 
                        _get_eval_enc_str(value))
    #self
    value
  end
end
