package Calculator;

public class EqualButtonObj extends ButtonObj 
{
  public EqualButtonObj( CalcTextGUI gui,
			 CalculatorState stateObj ) 
  {
    super( gui, stateObj );
  }

  public void handleButton() 
  {
    this.stateObj.doneReadingNumber();

    double newOperand = ( this.gui.getValue() );

    double newValue 
      = this.stateObj
            .getPendingOperation()
            .doOperation( this.stateObj.getPreviousOperand(), 
			  newOperand );

    this.gui.setText( String.valueOf( newValue ) );
    if ( java.lang.Double.isInfinite( newValue ) ) 
    {
      this.stateObj.setPreviousOperand( 0 );
    } else 
    {
      this.stateObj.setPreviousOperand( newValue );
    }
    this.stateObj.resetPendingOperation();
  }

}