package qtrees;

import java.io.IOException;
import java.io.Writer;

/**
 * Representation of a node in a QTree
 * @author Sjaak Smetsers
 * @author Camil Staps, s4498062
 * 
 * Note: the version by Sjaak Smetsers contained a sameLeaf method. This seems to be reduntant though, so I removed it.
 */
public abstract class QTNode {
    protected boolean boolean_value;
    protected String string_value;
    
    /**
     * Fill a (part of a) bitmap with this node
     * In the template this was an abstract method. However, then we would use
     * essentially the same code in BlackLeaf and WhiteLeaf. Using a concrete
     * function here that depends on static properties is much more flexible. In
     * GreyNode we still override this function.
     * @param x the x coordinate of the top left corner
     * @param y the y coordinate of the top left corner
     * @param width the width of the part of the bitmap to fill
     * @param bitmap the bitmap to fill
     */
    public void fillBitmap( int x, int y, int width, Bitmap bitmap ) {
        int old_x = x, old_y = y;
        for (; x < old_x + width; x++)
            for (y = old_y; y < old_y + width; y++)
                bitmap.setBit(x, y, boolean_value);
    }
    
    /**
     * Write a node as bitstream
     * In the template this was an abstract method. However, then we would use
     * essentially the same code in BlackLeaf and WhiteLeaf. Using a concrete
     * function here that depends on static properties is much more flexible. In
     * GreyNode we still override this function.
     * @param out Writer to write to
     * @throws IOException is passed on from Writer
     */
    public void writeNode( Writer out ) throws IOException {
        out.write("0" + string_value);
    }

    /**
     * Fill a complete area of a bitmap with a particular value
     * @param x the x coordinate of the top left corner
     * @param y the y coordinate of the top left corner
     * @param width the width (and height) of the area to fill
     * @param bitmap the bitmap to fill
     * @param val the value to fill the area with
     */
    public static void fillArea( int x, int y, int width, Bitmap bitmap, boolean val ){
        for (int i = 0; i < width; i++) {
            for (int j = 0; j < width; j++) {
                bitmap.setBit(x+i, y+j, val);
            }
        }
    }
}