package Calculator;

public class DotButtonObj extends ButtonObj 
{
  private ButtonObj zeroButton;

  public DotButtonObj( ButtonObj zeroButton, 
		       CalcTextGUI gui,
		       CalculatorState stateObj ) 
  {
    super( gui, stateObj );
    this.zeroButton = zeroButton;
  }

  public void handleButton() 
  {
    if ( this.stateObj.notReadingNumber() ) 
    {
      this.zeroButton.handleButton();
    }

    if ( this.stateObj.noDotYet() ) 
    {
      this.stateObj.justSawDot();
      this.gui.appendText( "." );
    }
  }

}