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