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tk/lib/tkextlib/blt/dragdrop.rb

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               # File tk/lib/tkextlib/blt/dragdrop.rb, line 20
def initialize(arg)
  if arg.kind_of?(Hash) # arg is a hash includes the widgetpath of token
    arg = _symbolkey2str(arg)
    install_win(nil, arg['widgetname'])
  else  # arg is a drag&drop source
    tk_call('::blt::drag&drop', 'source', arg)
    install_win(nil, tk_call('::blt::drag&drop', 'token', arg))
  end
end