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IDLE, an integrated development environment for Python written in 100% Python using Tkinter, is included in Python 2.3 standard library as `idlelib'.
This recipie, domtree.py', is a simple example for usingidlelib.TreeWidget'. It is a simplistic DOM viewer.
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51 | # domtree.py
# This is a simple example for idlelib.TreeWidget
# Written by Seo Sanghyeon
# Put into the public domain
from Tkinter import Tk, Canvas
from xml.dom.minidom import parseString
from idlelib.TreeWidget import TreeItem, TreeNode
class DomTreeItem(TreeItem):
def __init__(self, node):
self.node = node
def GetText(self):
node = self.node
if node.nodeType == node.ELEMENT_NODE:
return node.nodeName
elif node.nodeType == node.TEXT_NODE:
return node.nodeValue
def IsExpandable(self):
node = self.node
return node.hasChildNodes()
def GetSubList(self):
parent = self.node
children = parent.childNodes
prelist = [DomTreeItem(node) for node in children]
itemlist = [item for item in prelist if item.GetText().strip()]
return itemlist
data = '''
<a>
<b>
<c>d</c>
<c>e</c>
</b>
<b>
<c>f</c>
</b>
</a>
'''
root = Tk()
canvas = Canvas(root)
canvas.config(bg='white')
canvas.pack()
dom = parseString(data)
item = DomTreeItem(dom.documentElement)
node = TreeNode(canvas, None, item)
node.update()
node.expand()
root.mainloop()
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I couldn't find an easy recipie for using tree widgets in Tkinter. A tree widget is not a built-in widget of Tkinter. And though I found some handful of modules, I found idlelib.TreeWidget to be a nice choice among them. It is sorta built-in, isn't it?
Currently `idlelib' lacks documentations, and is not really used much outside IDLE. I hope this to be fixed soon.
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