def __init__(self, parent_node, id, collapsed_icon, x, y,
parent_widget=None, expanded_icon=None, label=None,
expandable_flag=0, draw=True):
"""overridden method (Node)"""
# Call the constructor of Node
Node.__init__(self, parent_node, id, collapsed_icon, x, y,
parent_widget, expanded_icon, label, expandable_flag)
# Add additional functionality to Node to allow selection of nodes and their subtrees
self.x = x
self.y = y
self.selected = False
sw = self.widget
self.checkUncheckImage = sw.create_image(x - sw.realDistX, y, image=sw.uncheckedIcon)
sw.tag_bind(self.checkUncheckImage, '<1>', self._selectNode)
sw.tag_bind(self.checkUncheckImage, '<3>', self._selectNode2)
sw.tag_bind(self.symbol, '<1>', self._onNodeSelect)
sw.tag_bind(self.label, '<1>', self._onNodeSelect)
self.toBeExpanded = False
