mirror of
https://github.com/gryf/debugging_python.git
synced 2025-12-17 11:30:30 +01:00
101 lines
3.2 KiB
Python
101 lines
3.2 KiB
Python
import Tkinter as tk
|
|
|
|
|
|
class CmInchConverter(object):
|
|
"""Simple conversion between length in cm to inch and inch to cm"""
|
|
|
|
def __init__(self):
|
|
"""Initialize"""
|
|
self._root = None
|
|
self.value = "0"
|
|
self.result = "0"
|
|
self.convert_to_inches = None
|
|
|
|
def run(self):
|
|
"""Create and execute program"""
|
|
self._gui_initialize()
|
|
self._root.mainloop()
|
|
|
|
def calculate(self):
|
|
"""Perform calculation"""
|
|
action = {1: self._inch_calculate,
|
|
2: self._cm_calculate}
|
|
try:
|
|
val = int(self.value.get())
|
|
except ValueError:
|
|
val = self.value.get()
|
|
|
|
result = action[self.convert_to_inches.get()](val)
|
|
self.result.set(result)
|
|
|
|
def _inch_calculate(self, val):
|
|
"""Calculate inch value from given val in cm"""
|
|
try:
|
|
return "%.4f" % val * 0.3937
|
|
except TypeError:
|
|
return "Err"
|
|
|
|
def _cm_calculate(self, val):
|
|
"""Calculate cm value from given val in inch"""
|
|
try:
|
|
return "%.4f" % val/0.3937
|
|
except TypeError:
|
|
return "Err"
|
|
|
|
def _gui_initialize(self):
|
|
"""Initialize the GUI"""
|
|
self._root = tk.Tk()
|
|
self._root.title("inch/cm converter")
|
|
|
|
self.convert_to_inches = tk.IntVar()
|
|
self.value = tk.StringVar()
|
|
self.result = tk.StringVar()
|
|
self.convert_to_inches.set(1)
|
|
self.value.set("0")
|
|
self.result.set("0")
|
|
|
|
mainframe = tk.Frame(self._root, pady=5, padx=5)
|
|
mainframe.grid(column=0, row=0, sticky=(tk.N, tk.W, tk.E, tk.S))
|
|
mainframe.columnconfigure(0, weight=1)
|
|
mainframe.rowconfigure(0, weight=1)
|
|
|
|
defaults = {"padx": 2, "pady": 2, "sticky": tk.W}
|
|
|
|
radio1 = tk.Radiobutton(mainframe,
|
|
text="cm to inches",
|
|
padx=2,
|
|
variable=self.convert_to_inches,
|
|
value=1)
|
|
radio1.grid(column=0, row=2, columnspan=2, **defaults)
|
|
radio2 = tk.Radiobutton(mainframe,
|
|
text="inches to cm",
|
|
padx=2,
|
|
variable=self.convert_to_inches,
|
|
value=2)
|
|
radio2.grid(column=0, row=3, columnspan=2, **defaults)
|
|
|
|
tk.Label(mainframe, text="Enter value:").grid(column=0, row=1,
|
|
**defaults)
|
|
entry1 = tk.Entry(mainframe, width=20, textvariable=self.value)
|
|
entry1.grid(column=1, row=1, **defaults)
|
|
|
|
tk.Label(mainframe, text="Result:").grid(column=0, row=4, **defaults)
|
|
|
|
entry2 = tk.Entry(mainframe, width=20, state=tk.DISABLED,
|
|
textvariable=self.result,
|
|
disabledbackground="White Smoke",
|
|
disabledforeground="Midnight Blue")
|
|
entry2.grid(column=1, row=4, **defaults)
|
|
tk.Button(mainframe, text="Calculate",
|
|
command=self.calculate).grid(column=3, row=5, **defaults)
|
|
|
|
|
|
def main():
|
|
"""Main function"""
|
|
conv = CmInchConverter()
|
|
conv.run()
|
|
|
|
|
|
if __name__ == '__main__':
|
|
main()
|