#!/usr/bin/env python

# $Id: calc.py,v 1.26 2001/09/27 08:24:57 wyy Exp $ 
#
# William Emmanuel S. YU <william.s.yu@ieee.org>
# Ateneo de Manila University, Philippines
#
# QT Python Calculator
# Copyright (C) 2001  William Emmanuel S. Yu
# 
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# any later version.
# 
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
# 
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
#

import sys
from qt import *
from FCalc import FCalc
from math import sqrt

# overriding the original calculator program
class FCalcMethods(FCalc):
	flag = 1;
	operator = 1;
	operand = 0;

	def __init__(self,parent = None,name = None,modal = 0,fl = 0):
		FCalc.__init__(self,parent,name,modal,fl)

		if name == None:
			self.setName('FCalcMethods')

	def sqrt(self):
		self.operand = self.Display.text()
		if str(self.operand) == "":
			self.operand = QString ("0")

		result = sqrt(float(str(self.operand)))
		if result == "":
			result = 0

		self.Display.clear()
		display = QString (str(result))
		self.Display.insert(display)
		self.operator = -1;
		self.operand = display;

	def equals(self):
		if str(self.operand) == "":
			self.operand = QString ("0")

		operand2 = self.Display.text()
		if str(operand2) == "":
			operand2 = QString ("0")

		if self.operator == 1:
			result = float(str(self.operand)) + float(str(operand2))
		elif self.operator == 2:
			result = float(str(self.operand)) - float(str(operand2))
		elif self.operator == 3:
			result = float(str(self.operand)) * float(str(operand2))
		elif self.operator == 4:
			result = float(str(self.operand)) / float(str(operand2))
		elif self.operator == 5:
			result = float(str(self.operand)) % float(str(operand2))

		if result == "":
			result = 0

		self.Display.clear()
		display = QString (str(result))
		self.Display.insert(display)
		self.operator = -1;
		self.operand = display;

	def add(self):
		self.operand = self.Display.text()
		self.Display.clear()
		self.operator = 1;

	def subtract(self):
		self.operand = self.Display.text()
		self.Display.clear()
		self.operator = 2;

	def multiply(self):
		self.operand = self.Display.text()
		self.Display.clear()
		self.operator = 3;

	def divide(self):
		self.operand = self.Display.text()
		self.Display.clear()
		self.operator = 4;

	def modulo(self):
		self.operand = self.Display.text()
		self.Display.clear()
		self.operator = 5;

	def allClear(self):
		self.Display.clear()
		self.operator = -1;
		self.operand = 0;

	def backSpace(self):
		self.Display.backspace()

	def printSign(self):
		display = str(self.Display.text())
		self.Display.clear()

		if display != "":
			value = float(display)
			if value == 0:
				result = -1
			else:
				result = value * -1
		else:
			result = -1

		display = QString (str(result))
		self.Display.insert (display)

	def printDot(self):
		if self.flag == 0:
			self.Display.insert (".")
		else:
			self.Display.clear()
			self.Display.insert (".")
			self.flag = 0

	def print0(self):
		if self.flag == 0:
			self.Display.insert ("0")
		else:
			self.Display.clear()
			self.Display.insert ("0")
			self.flag = 0

	def print1(self):
		if self.flag == 0:
			self.Display.insert ("1")
		else:
			self.Display.clear()
			self.Display.insert ("1")
			self.flag = 0

	def print2(self):
		if self.flag == 0:
			self.Display.insert ("2")
		else:
			self.Display.clear()
			self.Display.insert ("2")
			self.flag = 0

	def print3(self):
		if self.flag == 0:
			self.Display.insert ("3")
		else:
			self.Display.clear()
			self.Display.insert ("3")
			self.flag = 0

	def print4(self):
		if self.flag == 0:
			self.Display.insert ("4")
		else:
			self.Display.clear()
			self.Display.insert ("4")
			self.flag = 0

	def print5(self):
		if self.flag == 0:
			self.Display.insert ("5")
		else:
			self.Display.clear()
			self.Display.insert ("5")
			self.flag = 0

	def print6(self):
		if self.flag == 0:
			self.Display.insert ("6")
		else:
			self.Display.clear()
			self.Display.insert ("6")
			self.flag = 0

	def print7(self):
		if self.flag == 0:
			self.Display.insert ("7")
		else:
			self.Display.clear()
			self.Display.insert ("7")
			self.flag = 0

	def print8(self):
		if self.flag == 0:
			self.Display.insert ("8")
		else:
			self.Display.clear()
			self.Display.insert ("8")
			self.flag = 0

	def print9(self):
		if self.flag == 0:
			self.Display.insert ("9")
		else:
			self.Display.clear()
			self.Display.insert ("9")
			self.flag = 0

# main function of the program
def main ():
	QApplication.setColorSpec(QApplication.CustomColor)
	a = QApplication(sys.argv)

	w = FCalcMethods()
	a.setMainWidget(w)
	w.show()
	a.exec_loop()

if __name__ == '__main__':
	main()