def __init__(self, model, parent, *args):
super(HexItemDelegate, self).__init__(parent)
# compute size hint for hex view
dh = QTextDocument()
dh.setHtml("<font color='green'>DF</font>")
self.hex_hint = QtCore.QSize(dh.idealWidth()-dh.documentMargin(), 22)
# compute size hint for char view
dc = QTextDocument()
dc.setHtml("W")
self.char_hint = QtCore.QSize(dc.idealWidth()-dc.documentMargin(), 22)
self._model = model
