/*
 * ClearButtonObj Class
 *
 * Developed for "Rethinking CS101", a project of Lynn Andrea Stein's AP Group.
 * For more information, see <a href="http://www.ai.mit.edu/projects/cs101/">the
 * CS101 homepage</a> or email <las@ai.mit.edu>.
 *
 * Copyright (C) 1997 Massachusetts Institute of Technology.
 * Please do not redistribute without obtaining permission.
 */
package Calculator;

/**
 *  This class is a smart button object that clears the Calculator.
 *  Every ButtonHandler should have one.
 *
 * @author:  Luis F. G. Sarmenta, lfgs@mit.edu
 * @version: $$
 *
 * @see Calculator, ButtonHandler, ButtonObj
 */
public class ClearButtonObj extends ButtonObj 
{
    /**
     * How to make one: Make a ButtonObj (i.e., my superclass).  This
     * constructor exists only to call super w/the appropriate
     * arguments.
     *
     * @param gui      The CalcTextGUI to keep track of.
     * @param stateObj The CalculatorState to keep track of.
    */
  public ClearButtonObj( CalcTextGUI gui, CalculatorState stateObj ) 
  {
    super( gui, stateObj );
  }

    /**
     * This method is called by the ButtonHandler whenever the
     * decimal point button is pressed.  <p>
     *
     * How to handle (my button) being pressed?  Clear the calculator
     * by asking its state to reset.  <p>
     *
     * This should really call this.gui.clearScreen(), now, shouldn't it?
     */
  public void handleButton() 
  {
    this.stateObj.reset();
    this.gui.setText("");
  }

}

/*
 * $Log: ClearButtonObj.java,v $
 * Revision 1.1.1.1  2002/06/05 21:56:25  root
 * CS101 comes to Olin finally.
 *
 * Revision 1.2  1997/10/24 22:20:41  las
 * Documented all of the code files, but didn't write the user manual (yet).
 *
 */