/************************************************************
 * Classe per disegnare rombi sullo schermo. 
 * Il rombo e` determinato dalla sola sua diagonale.
 * Eredita getOffset, setOffset e drawAt dalla classe Figure.
 ************************************************************/
public class Diamond extends Figure
{
   private int diameter;

   public Diamond()
   {
       super();
       diameter = 0;
   }

   public Diamond(int theOffset, int theDiameter)
   {
       super(theOffset);
       diameter = theDiameter;
   }

   public void reset(int newOffset, int newDiameter)
   {
       setOffset(newOffset);
       diameter = newDiameter;
   }

    /*************************************
     * Disegna la figura alla riga corrente.
     *************************************/
   private void drawHere()
   {
       drawTop();
       drawBottom();
   }

   private void drawTop()
   {
        int startOfLine = getOffset() + (diameter/2);
        spaces(startOfLine);
        System.out.println('*');
        int count;
        int lineCount = (diameter/2) - 1;
        int insideWidth = 1;
        for (count = 0; count < lineCount; count++)
        {
            startOfLine--;
            spaces(startOfLine);
            System.out.print('*');
            spaces(insideWidth);
            System.out.println('*');
            insideWidth = insideWidth + 2;
        }
   }

   private void drawBottom()
   {
        int startOfLine = getOffset();
        int count;
        int lineCount = (diameter/2);
        int insideWidth = 2*lineCount - 1;
        for (count = 0; count < lineCount; count++)
        {

            spaces(startOfLine);
            System.out.print('*');
            spaces(insideWidth);
            System.out.println('*');
            insideWidth = insideWidth - 2;
            startOfLine++;
        }
        spaces(startOfLine);
        System.out.println('*');
   }

    // Scrive lo specificato numero di caratteri blank.
   private static void spaces(int number)
   {
        int count;
        for (count = 0; count < number; count++)
            System.out.print(' ');
   }
	
   public static void main(String[] args)
   {
    	int indent = 5, diagonale = 5;
        System.out.println("Test di Diamond");
 
        Diamond x = new Diamond(indent, diagonale);
      	x.drawAt(0);
		x.reset (4, 7);
		x.drawAt(0);
   }
	
}