Sep-26-2016, 09:19 PM
Hello,
Install Pmw (pip install Pmw), and try the following code (From graysons book, modified for python 3). It will show what can be done with tkinter.
Install Pmw (pip install Pmw), and try the following code (From graysons book, modified for python 3). It will show what can be done with tkinter.
from tkinter import *
import Pmw
class SLabel(Frame):
""" SLabel defines a 2-sided label within a Frame. The
left hand label has blue letters the right has white letters
"""
def __init__(self, master, leftl, rightl):
Frame.__init__(self, master, bg='gray40')
self.pack(side=LEFT, expand=YES, fill=BOTH)
Label(self, text=leftl, fg='steelblue1',
font=("arial", 6, "bold"), width=5, bg='gray40').pack(
side=LEFT, expand=YES, fill=BOTH)
Label(self, text=rightl, fg='white',
font=("arial", 6, "bold"), width=1, bg='gray40').pack(
side=RIGHT, expand=YES, fill=BOTH)
class Key(Button):
def __init__(self, master, font=('arial', 8, 'bold'),
fg='white', width=5, borderwidth=5, **kw):
kw['font'] = font
kw['fg'] = fg
kw['width'] = width
kw['borderwidth'] = borderwidth
# apply(Button.__init__, (self, master), kw)
Button.__init__(self, master, kw)
self.pack(side=LEFT, expand=NO, fill=NONE)
class Calculator(Frame):
def __init__(self, parent=None):
Frame.__init__(self, bg='gray40')
self.pack(expand=YES, fill=BOTH)
self.master.title('Tkinter Toolkit TT-42')
self.master.iconname('Tk-42')
self.calc = Evaluator() # This is our evaluator
self.build_calculator() # Build the widgets
# This is an incomplete dictionary - a good exercise!
self.actionDict = {'second': self.do_this, 'mode': self.do_this,
'delete': self.do_this, 'alpha': self.do_this,
'stat': self.do_this, 'math': self.do_this,
'matrix': self.do_this, 'program': self.do_this,
'vars': self.do_this, 'clear': self.clearall,
'sin': self.do_this, 'cos': self.do_this,
'tan': self.do_this, 'up': self.do_this,
'X1': self.do_this, 'X2': self.do_this,
'log': self.do_this, 'ln': self.do_this,
'store': self.do_this, 'off': self.turnoff,
'neg': self.do_this, 'enter': self.do_enter,
}
self.current = ""
@staticmethod
def do_this(action):
print('"{}" has not been implemented'.format(action))
def turnoff(self, *args):
self.quit()
def clearall(self, *args):
self.current = ""
self.display.component('text').delete(1.0, END)
def do_enter(self, *args):
result = self.calc.runpython(self.current)
if result:
self.display.insert(END, '\n')
self.display.insert(END, '{}\n'.format(result), 'ans')
self.current = ""
def do_keypress(self, event):
key = event.char
if not key in ['\b']:
self.current = self.current + event.char
if key == '\b':
self.current = self.current[:-1]
def key_action(self, key):
self.display.insert(END, key)
self.current = self.current + key
def eval_action(self, action):
try:
self.actionDict[action](action)
except KeyError:
pass
def build_calculator(self):
FUN = 1 # Designates a Function
KEY = 0 # Designates a Key
KC1 = 'gray30' # Dark Keys
KC2 = 'gray50' # Light Keys
KC3 = 'steelblue1' # Light Blue Key
KC4 = 'steelblue' # Dark Blue Key
keys = [
[('2nd', '', '', KC3, FUN, 'second'), # Row 1
('Mode', 'Quit', '', KC1, FUN, 'mode'),
('Del', 'Ins', '', KC1, FUN, 'delete'),
('Alpha', 'Lock', '', KC2, FUN, 'alpha'),
('Stat', 'List', '', KC1, FUN, 'stat')],
[('Math', 'Test', 'A', KC1, FUN, 'math'), # Row 2
('Mtrx', 'Angle', 'B', KC1, FUN, 'matrix'),
('Prgm', 'Draw', 'C', KC1, FUN, 'program'),
('Vars', 'YVars', '', KC1, FUN, 'vars'),
('Clr', '', '', KC1, FUN, 'clear')],
[('X-1', 'Abs', 'D', KC1, FUN, 'X1'), # Row 3
('Sin', 'Sin-1', 'E', KC1, FUN, 'sin'),
('Cos', 'Cos-1', 'F', KC1, FUN, 'cos'),
('Tan', 'Tan-1', 'G', KC1, FUN, 'tan'),
('^', 'PI', 'H', KC1, FUN, 'up')],
[('X2', 'Root', 'I', KC1, FUN, 'X2'), # Row 4
(',', 'EE', 'J', KC1, KEY, ','),
('(', '{', 'K', KC1, KEY, '('),
(')', '}', 'L', KC1, KEY, ')'),
('/', '', 'M', KC4, KEY, '/')],
[('Log', '10x', 'N', KC1, FUN, 'log'), # Row 5
('7', 'Un-1', 'O', KC2, KEY, '7'),
('8', 'Vn-1', 'P', KC2, KEY, '8'),
('9', 'n', 'Q', KC2, KEY, '9'),
('X', '[', 'R', KC4, KEY, '*')],
[('Ln', 'ex', 'S', KC1, FUN, 'ln'), # Row 6
('4', 'L4', 'T', KC2, KEY, '4'),
('5', 'L5', 'U', KC2, KEY, '5'),
('6', 'L6', 'V', KC2, KEY, '6'),
('-', ']', 'W', KC4, KEY, '-')],
[('STO', 'RCL', 'X', KC1, FUN, 'store'), # Row 7
('1', 'L1', 'Y', KC2, KEY, '1'),
('2', 'L2', 'Z', KC2, KEY, '2'),
('3', 'L3', '', KC2, KEY, '3'),
('+', 'MEM', '"', KC4, KEY, '+')],
[('Off', '', '', KC1, FUN, 'off'), # Row 8
('0', '', '', KC2, KEY, '0'),
('.', ':', '', KC2, KEY, '.'),
('(-)', 'ANS', '?', KC2, FUN, 'neg'),
('Enter', 'Entry', '', KC4, FUN, 'enter')]]
self.display = Pmw.ScrolledText(self, hscrollmode='dynamic',
vscrollmode='dynamic', hull_relief='sunken',
hull_background='gray40', hull_borderwidth=10,
text_background='honeydew4', text_width=16,
text_foreground='black', text_height=6,
text_padx=10, text_pady=10, text_relief='groove',
text_font=('arial', 12, 'bold'))
self.display.pack(side=TOP, expand=YES, fill=BOTH)
self.display.tag_config('ans', foreground='white')
self.display.component('text').bind('<Key>', self.do_keypress)
self.display.component('text').bind('<Return>', self.do_enter)
for row in keys:
rowa = Frame(self, bg='gray40')
rowb = Frame(self, bg='gray40')
for p1, p2, p3, color, ktype, func in row:
if ktype == FUN:
a = lambda s=self, a=func: s.eval_action(a)
else:
a = lambda s=self, k=func: s.key_action(k)
SLabel(rowa, p2, p3)
Key(rowb, text=p1, bg=color, command=a)
rowa.pack(side=TOP, expand=YES, fill=BOTH)
rowb.pack(side=TOP, expand=YES, fill=BOTH)
class Evaluator:
def __init__(self):
self.myNameSpace = {}
self.runpython("from math import *")
def runpython(self, code):
try:
return eval(code, self.myNameSpace, self.myNameSpace)
except SyntaxError:
try:
exec(code in self.myNameSpace, self.myNameSpace)
except:
print("Unexpected error:", sys.exc_info()[0])
return 'Error'
if __name__ == '__main__':
Calculator().mainloop()Larz60+