#
# file: conversion.py
#
# This program makes conversion from centimiters to inches
# using graphics

from graphics import *

def main():
    win = GraphWin("Converter from centimiters to inches",480,360)
    win.setBackground('white')

    inputText = Text(Point(80,40),"Centimiters:")
    inputText.draw(win)
    inputBox = Entry(Point(170,40),7)
    inputBox.setText(" ")
    inputBox.draw(win)

    outpt = Text(Point(90,170),"Inches:")
    outpt.draw(win)
    output = Text(Point(150,170)," ")
    output.draw(win)
    
    button = Rectangle(Point(120,90),Point(200,140))
    button.setOutline('yellow')
    button.setFill('yellow')
    button.draw(win)

    button_text = Text(Point(160,115),"Convert!")
    button_text.draw(win)

    p = win.getMouse()

    try:
        cm = float(inputBox.getText())
        inches = cm / 2.54

        output.setText("%0.2f" % inches)
        button_text.setText("Quit!")
    
        p = win.getMouse()

    except:
        Text(Point(240,300),"Incorrect input.").draw(win)
        Text(Point(200,200),"Click anywhere to quit").draw(win)
        p = win.getMouse()
        
    win.close()

main()