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#!/usr/bin/python
"""
A mortgage repayment calculator. Used in the presentation at VanPy 2005 and PyCon 2005.
Subsequently borrowed for the presentation at OSDC 2005
"""
__version__ = "$Revision: 1.2 $"
__date__ = "$Date: 2005/12/13 11:13:22 $"
from PythonCard import dialog, model
import pyfi
class MyBackground(model.Background)
def on_initialize(self, event):
# if you have any initialization
# including sizer setup, do it here
self.on_Calculate_mouseClick(None)
def on_Calculate_mouseClick(self, event):
comp = self.components
try:
principal = float(comp.Principal.text)
interestRate = float(comp.InterestRate.text)
if interestRate > 1:
interestRate = interestRate / 100.0
payment15 = pyfi.amortization(principal, interestRate, 12, 15 * 12)
payment30 = pyfi.amortization(principal, interestRate, 12, 30 * 12)
comp.Result.text = "15 year monthly payment: %.2f\n30 year monthly payment: %.2f" % (payment15, payment30)
except ValueError:
dialog.alertDialog(self, 'Please enter valid values', 'Input Value(s) Error')
if __name__ == '__main__':
app = model.Application(MyBackground)
app.MainLoop()
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