world wide widgets

Lots of great Tkinter widges abound on the web and even in the Python source code under demos. Here are my newest favs and some others I've posted previously:

1. scrolled canvas: uses canvas windows with frames and a scrollbar. credit: python source code demo "canvas-with-scrollbars.py"
2. treeview table: uses a ttk.Treeview to make a table - and they said it couldn't be done. credit: daniweb
3. rascally resize tk scrollbars
4. ttk Notebook demo for Py2

Please feel free to copy these and use them for good. They are covered by this license.

	from Tkinter import Canvas, GROOVE, BOTH, X, Y, YES, RIGHT, LEFT, W
	from ttk import Frame, Scrollbar, Checkbutton
	import logging
	import tkMessageBox
	class ScrolledCanvas(Frame):
	"""
	A scrolling canvas of frames with checkboxes.
	"""
	def __init__(self, master, name=None, scrollregion=(0, 0, '5i', '5i'),
	items=[], window_size=[160, 30], **canvaskw):
	Frame.__init__(self, master, name=name)
	self.scrollcanvas = Canvas(self, name='scrollcanvas',
	scrollregion=scrollregion, **canvaskw)
	self.yscroll = Scrollbar(self, name='yscroll',
	command=self.scrollcanvas.yview)
	self.scrollcanvas['yscrollcommand'] = self.yscroll.set
	self.yscroll.pack(side=RIGHT, fill=Y)
	self.scrollcanvas.pack(side=LEFT, fill=BOTH, expand=YES)
	self.items = dict.fromkeys(items)
	for n, i in enumerate(items):
	self.items[i] = {'frame': Frame(self, name=(i.lower() + '_frame'))}
	self.items[i]['frame'].config(relief=GROOVE, padding=5)
	self.items[i]['chbx'] = Checkbutton(self.items[i]['frame'],
	name=(i.lower() + '_chbx'))
	self.items[i]['chbx']['text'] = i
	self.items[i]['chbx'].pack(side=LEFT, fill=X)
	y = window_size[1] / 2 + window_size[1] * n
	self.items[i]['window'] = self.scrollcanvas.create_window(0, y)
	self.scrollcanvas.itemconfigure(self.items[i]['window'],
	window=self.items[i]['frame'],
	anchor=W, width=window_size[0],
	height=window_size[1])
	def onLeftClick(item, event):
	logging.debug(event.__dict__)
	if tkMessageBox.askokcancel('scrolled canvas', item):
	return
	if __name__ == "__main__":
	import tkFont
	from Tkinter import Tk
	dummy_items = ['holy grail', 'meaning of life', 'life of brian',
	'jabberwocky', "monte python's flying circus",
	'time bandits', 'brazil', '12 monkeys',
	'adventures of baron von munchausen']
	root = Tk()
	maxstr = max(dummy_items, key=lambda x: len(x))
	pixsz = tkFont.Font().measure(maxstr)+25
	chrsz = len(maxstr)+5
	scrollcanvas = ScrolledCanvas(root, scrollregion=[0, 0, '5i', '3i'],
	items=dummy_items, height='2i',
	window_size=[pixsz, 30], width=pixsz)
	# add bindings?
	for item, val in scrollcanvas.items.iteritems():
	logging.debug('binding frame %s', val['frame'])
	callback = lambda e, i=item: onLeftClick(i, e)
	val['frame'].bind('<Button-1>', callback)
	scrollcanvas.pack(expand=YES, fill=BOTH)
	scrollcanvas.mainloop()

view raw scrolled_canvas.py hosted with ❤ by GitHub

	from Tkinter import N, E, W, S, END, YES, BOTH
	from ttk import Frame, Treeview, Scrollbar
	import tkFont
	import logging
	class TreeTable(Frame):
	"""
	A table based on :class:`ttk.Treeview`.
	:Parameters:
	**master** : Tkinter or ttk widget
	The widget in which the :class:`TableTree` will reside.
	**headers** : list of str
	The column headers for the table.
	**data** : list of tuples
	Table data. There must be as many elements in each tuple as there \
	are headers. Each tuple in the list corresponds to a row in the \
	table.
	"""
	def __init__(self, master, headers, data, name=None):
	Frame.__init__(self, master, name=name)
	#: column headers
	self.headers = headers
	#: table data
	self.data = data
	#: :class:`~ttk.Treeview` that only shows "headings" not "tree columns"
	self.tree = Treeview(self, columns=self.headers, show="headings",
	name='tabletree')
	#: vertical scrollbar
	self.yscroll = Scrollbar(self, orient="vertical",
	command=self.tree.yview, name='table_yscroll')
	#: horizontal scrollbar
	self.xscroll = Scrollbar(self, orient="horizontal",
	command=self.tree.xview, name='table_xscroll')
	self.tree['yscrollcommand'] = self.yscroll.set # bind to scrollbars
	self.tree['xscrollcommand'] = self.xscroll.set
	# position widgets and set resize behavior
	self.tree.grid(column=0, row=0, sticky=(N + E + W + S))
	self.yscroll.grid(column=1, row=0, sticky=(N + S))
	self.xscroll.grid(column=0, row=1, sticky=(E + W))
	self.grid_columnconfigure(0, weight=1)
	self.grid_rowconfigure(0, weight=1)
	# build tree
	for col in self.headers:
	# NOTE: Use col as column identifiers, crafty!
	# NOTE: Also change col to title case using str.title()
	# NOTE: make lambda behave nicely in a loop using default arg!
	callback = lambda c=col: self.sortby(c, False)
	self.tree.heading(col, text=col.title(), command=callback)
	# adjust the column's width to the header string
	self.tree.column(col, width=tkFont.Font().measure(col.title()))
	# insert a new top-level treeview item by suing an empty string
	for item in self.data:
	self.tree.insert('', END, values=item)
	# adjust column's width if necessary to fit each value
	for idx, val in enumerate(item):
	col_width = tkFont.Font().measure(val)
	# option can be specified at least 3 ways: as (a) width=None,
	# (b) option='width' or (c) 'width', where 'width' can be any
	# valid column option.
	if self.tree.column(self.headers[idx], 'width') < col_width:
	self.tree.column(self.headers[idx], width=col_width)
	def sortby(self, col, descending):
	"""
	Sort table contents when a column header is clicked.
	:Parameters:
	**col**
	The column identifier of the column to sort.
	**descending**
	False if ascending, True if descending, switches each time.
	"""
	logging.debug('sortby %s, descending: %s', col, descending)
	# grab values to sort
	data = [(self.tree.set(child, col), child)
	for child in self.tree.get_children('')]
	# now sort the data in place
	data.sort(reverse=descending)
	for idx, item in enumerate(data):
	self.tree.move(item[1], '', idx)
	# switch the heading so it will sort in the opposite direction
	callback = lambda: self.sortby(col, not descending)
	self.tree.heading(col, command=callback)
	if __name__ == "__main__":
	from Tkinter import Tk
	dummy_data = [('holy grail', 1975), ('meaning of life', 1983),
	('life of brian', 1979), ('jabberwocky', 1977),
	('time bandits', 1981), ('brazil', 1985),
	('12 monkeys', 1995),
	('adventures of baron von munchausen', 1988)]
	headers = ['movie title', 'year']
	root = Tk()
	treetable = TreeTable(root, headers=headers, data=dummy_data)
	treetable.tree['height'] = 4
	treetable.pack(expand=YES, fill=BOTH)
	treetable.mainloop()

view raw treeview_table.py hosted with ❤ by GitHub