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Class Calculator.NumButtonObj

java.lang.Object
   |
   +----Calculator.ButtonObj
           |
           +----Calculator.NumButtonObj
public class NumButtonObj
extends ButtonObj
This class is a smart button object that handles the Calculator's numeric buttons. Every ButtonHandler should have ten ( 0 - 9 ).

See Also:
Calculator

Constructor Index

o NumButtonObj(int, CalcTextGUI, CalculatorState)
How to make one: Make a ButtonObj (i.e., my superclass) and also remember my number.

Method Index

o handleButton()
This method is called by the ButtonHandler whenever the decimal point button is pressed.

Constructors

o NumButtonObj 
 public NumButtonObj(int num,
                     CalcTextGUI gui,
                     CalculatorState stateObj)
How to make one: Make a ButtonObj (i.e., my superclass) and also remember my number.

Parameters:
num - Which numbered button am I? ( 0 - 9 )
gui - The CalcTextGUI to keep track of.
stateObj - The CalculatorState to keep track of.

Methods

o handleButton 
 public void handleButton()
This method is called by the ButtonHandler whenever the decimal point button is pressed.

How to handle (my button) being pressed? Make sure that we're reading a number (tell the stateObj if it doesn't know) and then either use this number as the current display or append it to it if there's already a partial number.

Overrides:
handleButton in class ButtonObj
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