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"""\
A silly little calculator implemented in JPython using
Java components for the UI.
"""
import java
from java import awt
def exit(e): java.lang.System.exit(0)
def getField (f):
t = f.getText ()
if t == '':
return 0
else:
return java.lang.Integer.parseInt (t)
def doMath (e):
n1 = getField (f1)
n2 = getField (f2)
sum.setText (repr (n1 + n2))
diff.setText (repr (n1 - n2))
prod.setText (repr (n1 * n2))
quo.setText (repr (n1 / n2))
f = awt.Frame ('BSH Calculator (jpython)', windowClosing=exit)
f1 = awt.TextField (20, actionPerformed=doMath)
f2 = awt.TextField (20, textValueChanged=doMath)
p = awt.Panel ()
p.setLayout (awt.GridLayout (2, 2))
p.add (awt.Label ('Enter Operand'))
p.add (f1)
p.add (awt.Label ('Enter Operand'))
p.add (f2)
f.add ('North', p)
f.add ("Center", awt.Label ('Results:'))
p = awt.Panel ()
p.setLayout (awt.GridLayout (4, 2))
p.add (awt.Label ('Sum'))
sum = awt.TextField (20)
p.add (sum)
p.add (awt.Label ('Difference'))
diff = awt.TextField (20)
p.add (diff)
p.add (awt.Label ('Product'))
prod = awt.TextField (20)
p.add (prod)
p.add (awt.Label ('Quotient'))
quo = awt.TextField (20)
p.add (quo)
f.add ('South', p)
f.pack ()
f.show ()
f.toFront ()
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