import objectdraw.*;

/**
 * Created nested squares iteratively (non-recursively).
 */
public class NestedSquaresIter {

    // spacing between layers of nested squares
    private static final double SQUARE_SPACING = 20;
    
    // side size of the smallest (innermost) square
    private static final double SMALLEST_SIDE_SIZE = 50;

    // the outermost square
    private FramedRect outerSquare;
    
    // create the nested squares at (upperLeftX, upperLeftY) with spacing
    // squareSpacing and an outermost square that has side of length sideSize.
    public NestedSquaresIter(double upperLeftX, double upperLeftY, double sideSize, 
            DrawingCanvas canvas) {

        // draw the outer square no matter what
        outerSquare = new FramedRect(upperLeftX, upperLeftY, sideSize, sideSize, canvas);

        // if the sideSize is still greater than the smallest side size,
        // draw the rest iteratively
        while (sideSize > SMALLEST_SIDE_SIZE) {
            sideSize = sideSize - SQUARE_SPACING * 2;
            upperLeftX = upperLeftX + SQUARE_SPACING;
            upperLeftY = upperLeftY + SQUARE_SPACING;
            new FramedRect(upperLeftX, upperLeftY, sideSize, sideSize, canvas);
        }

    }

    // centers the outer square on the given point
    public void centerOnPoint(Location point) {
        outerSquare.moveTo(point.getX() - outerSquare.getWidth()/2,
            point.getY() - outerSquare.getHeight()/2);
    }

    // move outer square by indicated offsets
    public void move(double xOffset, double yOffset) {
        outerSquare.move(xOffset, yOffset);
    }

    // checks if the Location is in the NestedSquares object
    public boolean contains(Location point) {
        return outerSquare.contains(point);
    }
    
}