| """\ |
| 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 () |
