The original Tcl demo includes code to create peer and split windows; however, the Text.peer_create() method is not available in Python 3.2.3 under Windows.
# File: textwindows.py
#
# http://infohost.nmt.edu/tcc/help/pubs/tkinter//text.html
# http://infohost.nmt.edu/tcc/help/pubs/tkinter//panedwindow.html
# http://www.tcl.tk/man/tcl8.5/TkCmd/text.htm
# http://www.tcl.tk/man/tcl8.5/TkCmd/panedwindow.htm
from tkinter import *
from tkinter import ttk
import tkinter.messagebox as mb
from demopanels import MsgPanel, SeeDismissPanel
class TextWindowsDemo(ttk.Frame):
def __init__(self, isapp=True, name='textwindowsdemo'):
ttk.Frame.__init__(self, name=name)
self.pack(expand=Y, fill=BOTH)
self.master.title('Text Embedded Windows and other features Demo')
self.isapp = isapp
self._create_widgets()
def _create_widgets(self):
if self.isapp:
# don't need message panel
SeeDismissPanel(self)
self._create_demo_panel()
def _create_demo_panel(self):
demoPanel = Frame(self, highlightthickness=1,
borderwidth=1, relief=SUNKEN,
name='demo')
demoPanel.pack(side=TOP, fill=BOTH, expand=Y)
text = self._create_text_widget(demoPanel)
self._add_content(text)
def _create_text_widget(self, parent):
# create scrolled text widget
text = Text(parent, height=30, setgrid=True, wrap=WORD,
width=70, highlightthickness=0,
borderwidth=0, pady=5, padx=8)
# setup scrollbar
yscroll = ttk.Scrollbar(parent, orient=VERTICAL,
command=text.yview)
text.configure(yscrollcommand=yscroll.set)
# prevent edit of text
text.bind('<KeyPress>', lambda e: 'break')
# position in frame and set resize constraints
# Note: if pack() is used, vertical scrollbar
# is 'clipped' when window size is reduced
# and disappears
yscroll.grid(row=0, column=1, sticky=N+S)
text.grid(row=0, column=0, sticky=N+S+E+W)
parent.grid_rowconfigure(0, weight=1)
parent.grid_columnconfigure(0, weight=1)
return text
def _add_content(self, text):
# configure tags
text.tag_config('center', justify=CENTER,
spacing1='5m', spacing3='5m')
text.tag_config('buttons', lmargin1='1c', lmargin2='1c',
rmargin='1c', spacing1='3m',
spacing2=0, spacing3=0)
# insert text
text.insert(END, ''.join(
["A text widget can contain many different kinds of items, ",
"both active and passive. It can lay these out in various ",
"ways, with wrapping, tabs, centering, etc. In addition, ",
"when the contents are too big for the window, smooth ",
"scrolling in all directions is provided.\n\n",
"A text widget can contain other widgets embedded ",
'in it. These are called "embedded windows" ',
"and they can consist of arbitrary widgets. ",
"For example, here are two embedded button ",
"widgets. You can click on the first button to "]))
# create and add buttons to turn the horizontal scroll on/off
self._create_hscroll_btns(text)
text.window_create(END, window=text.__on) # insert button
text.insert(END, ''.join([" horizontal scrolling, which also turns off ",
"word wrapping. Or, you can click on the second ",
"button to "]))
text.window_create(END, window=text.__off) # insert button
text.insert(END, " horizontal scrolling and turn word wrapping back on.\n\n")
# create and add buttons to display/remove a simple plot
self._create_plot_btns(text)
text.insert(END, "Or, here is another example. If you ")
text.window_create(END, window=text.__click)
text.insert(END, " a canvas displaying an x-y plot will appear right here.")
# marks for plot insertion
text.mark_set('plot', INSERT)
text.mark_gravity('plot', LEFT)
text.insert(END, " You can drag the data points around with the mouse, ")
text.insert(END, "or you can click here to ")
text.window_create(END, window=text.__delete)
text.insert(END, " the plot again.\n\n")
# create and add 'peer window' buttons
self._create_peer_btns(text)
text.insert(END, "You can also create multiple text widgets each of which ")
text.insert(END, "display the same underlying text. Click this button to ")
text.window_create(END, window=text.__peer, padx=3, pady=2)
text.insert(END, " widget. Notice how peer widgets can have different ")
text.insert(END, "font settings, and by default contain all the images ")
text.insert(END, "of the 'parent', but many of the embedded windows, ")
text.insert(END, "such as buttons will not be there. The easiest way ")
text.insert(END, "to ensure they are in all peers is to use '-create' ")
text.insert(END, "embedded window creation scripts ")
text.insert(END, "(the plot above and the 'Make A Peer' button are ")
text.insert(END, "designed to show up in all peers). A good use of ")
text.insert(END, "peers is for ")
text.window_create(END, window=text.__split, padx=3, pady=2)
text.insert(END, " \n\n")
text.insert(END, "Users of previous versions of Tk will also be interested ")
text.insert(END, "to note that now cursor movement is now by visual line by ")
text.insert(END, "default, and that all scrolling of this widget is by pixel.\n\n")
text.insert(END, "You may also find it useful to put embedded windows in ")
text.insert(END, "a text without any actual text. In this case the ")
text.insert(END, "text widget acts like a geometry manager. For ")
text.insert(END, "example, here is a collection of buttons laid out ")
text.insert(END, "neatly into rows by the text widget. These buttons ")
text.insert(END, "can be used to change the background color of the ")
text.insert(END, "text widget (\"Default\" restores the color to ")
text.insert(END, "its default). If you click on the button labeled ")
text.insert(END, "\"Short\", it changes to a longer string so that ")
text.insert(END, "you can see how the text widget automatically ")
text.insert(END, "changes the layout. Click on the button again ")
text.insert(END, "to restore the short string.\n")
# add short, default and color buttons
text.window_create(END, window=self._create_short_btn(text), padx=3, pady=2)
text.window_create(END, window=self._create_default_btn(text), padx=3, pady=2)
self._add_color_btns(text)
# applies the 'buttons' tag to the default, short and color buttons
text.tag_add('buttons', text.__short, END)
# mark end of color button tagging
btnEnd = text.tag_ranges('buttons')[1]
text.insert(END, "\n\nYou can also change the usual border width, ")
text.insert(END, "highlightthickness and padding.\n")
# remove tag (if not removed will apply to all remaining text)
text.tag_remove('buttons', btnEnd, END)
# add buttons to control border, highlight and padding
self._add_border_btns(text)
text.insert(END, '\n')
text.tag_add('buttons', text.__borderBtn, END)
btnEnd = text.tag_ranges('buttons')[-1] # save last pos of all the tag's ranges
# add an image
text.insert(END, "\nFinally, images fit comfortably in text widgets too:\n")
text.tag_remove('buttons', btnEnd, END)
# must save a permanent link to the image, otherwise
# it will be garbage collected
self.__im = BitmapImage(file='images/face.xbm')
text.image_create(END, image=self.__im)
# note that 'btnEnd' is a Tcl_obj, use it's string method
# to convert it's value to a float
text.tag_add('center', float(str(btnEnd))+1, END)
# ===========================================================================
# Button Creation
# - methods to create all the buttons used in the text content
# - all buttons are created as children of the 'text' widget
# ===========================================================================
def _create_hscroll_btns(self, txt):
txt.__on = ttk.Button(txt, text='Turn On', cursor='top_left_arrow',
style='Demo.TButton',
command=lambda t=txt: self._text_wnd_on(t))
txt.__off = ttk.Button(txt, text='Turn Off', cursor='top_left_arrow',
style='Demo.TButton',
command=lambda t=txt: self._text_wnd_off(t))
def _create_plot_btns(self, txt):
txt.__click = ttk.Button(txt, text='Click Here', cursor='top_left_arrow',
style='Demo.TButton',
command=lambda t=txt: self._text_wnd_plot(t))
txt.__delete = ttk.Button(txt, text='Delete', cursor='top_left_arrow',
style='Demo.TButton',
command=lambda t=txt: self._text_wnd_del(t))
def _create_peer_btns(self, txt):
txt.__peer = ttk.Button(txt, text='Make a Peer', cursor='top_left_arrow',
style='Demo.TButton',
command=lambda t=txt: self._text_make_peer(t))
txt.__split = ttk.Button(txt, text='Split Windows', cursor='top_left_arrow',
style='Demo.TButton', state='disabled',
command=lambda t=txt: self._text_split_wnd(t))
def _create_short_btn(self, txt):
# button changes size based on text display
# clicking on it demonstrates the text widget's ability to re-flow the
# color buttons that follow; much as a grid manager can reflow content
# the callback changes its text and reconfigures it to act as
# a 'Toolbutton' when clicked
ttk.Style().configure('Demo.Toolbutton', anchor='center', padding=(5,5))
btn = ttk.Checkbutton( txt,
style='Demo.TButton',
offvalue='Short',
onvalue='A much longer string',
cursor='top_left_arrow')
btn['command'] = lambda b=btn: self._cb_value_changed(b)
btn['text'] = 'Short'
txt.__short = btn # save to use as start of button tag area
return btn
def _create_default_btn(self, txt):
# create the 'Default' button to allow colour reset
bgc = txt['background']
btn = ttk.Button(txt, text='Default', cursor='top_left_arrow',
style='Demo.TButton', width=15,
command=lambda c=bgc, t=txt: self._set_bgcolor(t, c))
return btn
def _add_color_btns(self, txt):
# add a number of colour buttons that will change the text
# background colour when clicked
colors = ( 'AntiqueWhite3', 'Bisque1', 'Bisque2', 'Bisque3', 'Bisque4',
'SlateBlue3', 'RoyalBlue1', 'SteelBlue2', 'DeepSkyBlue3', 'LightBlue1',
'DarkSlateGray1', 'Aquamarine2', 'DarkSeaGreen2', 'SeaGreen1',
'Yellow1', 'IndianRed1', 'IndianRed2', 'Tan1', 'Tan4' )
for c in colors:
btn = ttk.Button(txt, text=c, cursor='top_left_arrow',
style='Demo.TButton', width=15,
command=lambda c=c, t=txt: self._set_bgcolor(t,c))
txt.window_create(END, window=btn, padx=3, pady=2)
def _add_border_btns(self, txt):
# save existing style settings
norm = {'bw': {'borderwidth': txt.cget('borderwidth')},
'hi': {'highlightthickness': txt.cget('highlightthickness')},
'pad': {'padx': txt.cget('padx'),
'pady': txt.cget('pady')}}
# create buttons to control the text border and highlight
btn = ttk.Button(txt, text='Big Borders',
width=15, cursor='top_left_arrow',
command=lambda t=txt: t.configure({'borderwidth': 15}))
txt.window_create(END, window=btn)
txt.__borderBtn = btn # save for tag marking
btn = ttk.Button(txt, text='Small borders',
width=15, cursor='top_left_arrow',
command=lambda t=txt, n=norm: t.configure(n['bw']))
txt.window_create(END, window=btn)
# create buttons to control the text highlightthickness
btn = ttk.Button(txt, text='Big highlight',
width=15, cursor='top_left_arrow',
command=lambda t=txt: t.configure({'highlightthickness': 15}))
txt.window_create(END, window=btn)
btn = ttk.Button(txt, text='Small highlight',
width=15, cursor='top_left_arrow',
command=lambda t=txt, n=norm: t.configure(n['hi']))
txt.window_create(END, window=btn)
# create buttons to control the text's padding
btn = ttk.Button(txt, text='Big pad',
width=15, cursor='top_left_arrow',
command=lambda t=txt: t.configure({'padx': 30, 'pady': 15}))
txt.window_create(END, window=btn)
btn = ttk.Button(txt, text='Small pad',
width=15, cursor='top_left_arrow',
command=lambda t=txt, n=norm: t.configure(n['pad']))
txt.window_create(END, window=btn)
# ===========================================================================
# Button Commands
# ===========================================================================
def _text_wnd_on(self, txt):
# add a horizontal scrollbar to the window
# and turn off word wrap
hscroll = ttk.Scrollbar(txt.master, orient=HORIZONTAL,
command=txt.xview, name='hscroll')
hscroll.grid(row=1, column=0, sticky=E+W)
txt['xscrollcommand'] = hscroll.set
txt['wrap'] = NONE
def _text_wnd_off(self, txt):
# turn word wrap back on and destroy the horizontal scrollbar
txt.master.nametowidget('hscroll').destroy()
txt['xscrollcommand'] = ''
txt['wrap'] = WORD
def _text_wnd_plot(self, txt):
if hasattr(txt, 'plot'):
return # already showing the plot
# create and insert the plot
txt.insert('plot', '\n')
# Note: if the 'create' option is used
# the plot won't display, even if
# a permanent reference is kept to
# the canvas object
txt.window_create('plot', window=self._create_plot(txt))
txt.tag_add('center', 'plot')
txt.insert('plot', '\n')
def _text_wnd_del(self, txt):
# remove the plot
if txt.plot:
c = txt.plot.destroy()
# remove extra space inserted
# around the plot
s = txt.get('plot') + ' \t\n'
for _ in s:
txt.delete('plot')
txt.insert('plot', ' ')
def _text_make_peer(self, txt):
mb.showinfo('Text Peers',
'Text.peer_create() is not available in Python 3.2.3')
def _text_split_wnd(self, txt):
# not implemented
pass
def _cb_value_changed(self, cb):
# called when the 'Short' button is clicked
# if selected, use the 'Toolbutton'
# style to make it appear 'sunken'
if cb.instate(('selected',)):
cb['style'] = 'Demo.Toolbutton'
if cb.cget('text'):
cb['text'] = cb['onvalue']
else:
cb['style'] = 'Demo.TButton'
if cb.cget('text'):
cb['text'] = cb['offvalue']
def _set_bgcolor(self, text, color):
# called when the default or colour buttons are clicked
text['background'] = color
ttk.Style().configure('Demo.TButton', background=color)
# ===================================================================
# Create a simple plot
# ===================================================================
def _create_plot(self, txt):
c = Canvas(txt, relief=SUNKEN, width=450,
height=300, cursor='top_left_arrow')
c.create_text(225, 20, text='A simple plot',
font='helvetica 18', fill='brown' )
# draw the x and y axis
c.create_line(100, 250, 400, 250, width=2 )
c.create_line(100,250, 100, 50, width=2 )
for i in range(1,11):
x = 100+i*30
c.create_line(x, 250, x, 245, width=2)
c.create_text(x, 254, text=str(i*10), anchor='n',
font='helvetica 16' )
for i in range(0,6):
y = 250-i*40
c.create_line(100, y, 105, y, width=2)
c.create_text(96, y, text=str(i)+'.0', anchor='e',
font='helvetica 16' )
# draw the points
points = [(12, 56), (20, 94), (33, 98), (32, 120),
(61, 180), (75, 160), (98, 223) ]
c.items=[]
for p0, p1 in points:
x = 100 + 3*p0
y = 250 - 4*p1/5
itm = c.create_oval(x-6,y-6,x+6, y+6,
width=1, outline='black',
fill='SkyBlue2')
c.addtag_withtag('points', itm )
c.items.append(itm)
# collectively bind the points, using the tag
c.tag_bind('points', '<Any-Enter>', lambda e, p=c: self._plot_enter(e, p) )
c.tag_bind('points', '<Any-Leave>', lambda e, p=c: self._plot_leave(e, p))
c.tag_bind('points', '<B1-Motion>', lambda e, p=c: self._plot_move(e, p) )
txt.plot = c # save a reference to the plot
return c
def _plot_enter( self, evt, plot ):
plot.itemconfigure('current', fill='red' )
plot.oldx, plot.oldy = plot.canvasx(evt.x), plot.canvasy(evt.y)
def _plot_leave( self, evt, plot ):
plot.itemconfigure('current', fill='SkyBlue2' )
def _plot_move( self, evt, plot ):
x,y = plot.canvasx(evt.x), plot.canvasy(evt.y)
plot.move('current', x-plot.oldx, y-plot.oldy )
plot.oldx, plot.oldy = x, y
if __name__ == '__main__':
TextWindowsDemo().mainloop()
