def _createDataGraph(self, parent):
""" This will be the upper part of the right panel.
It will contain the Data Graph with their relations.
"""
self._dataCanvas = Canvas(parent, width=600, height=500)
self._dataCanvas.grid(row=0, column=0, sticky='nsew')
self._dataCanvas.onClickCallback = self._onClick
self._dataCanvas.onDoubleClickCallback = self._onDoubleClick
self._dataCanvas.onRightClickCallback = self._onRightClick
self._updateDataGraph()
