Lee

Glad you found the guide useful!

A mixin can only extend other mixins or Java interfaces. Since BoardSquare extends CustomNode you can’t use it as a mix-in.

You could define BoardSquareInterface as a mixin (or subclass it with a new mixin) and provide a default implementation for the methods.

Grate guide this has really helped me out, thank you very much.

Although I am struggling with one aspect the “use Mixins instead of Multiple Inheritance”. Once I use “Public mixin class” I am no longer able to use “extends CustomNode, BoardSquareInterface”. Because it gives me an error within NetBeans, do you know any way I could get around this?

I have included the code that worked with javafx 1.1 below:

public class BoardSquare extends CustomNode, BoardSquareInterface {
public var pieceWidth : Number;
public var pieceHeight : Number;
public-init var positionX : Integer;
public-init var positionY : Integer;
public var content : Piece;
public-init var board : Board;

def square = Rectangle
{
x: bind positionX * pieceWidth;
y: bind positionY * pieceHeight;
width: bind pieceWidth;
height: bind pieceHeight;
fill: Color.LIGHTGOLDENRODYELLOW;
}
public function getXPixel() : Number
{
return positionX * pieceWidth;
}

public function getYPixel() : Number
{
return positionY * pieceHeight;
}

override function create():Node {
return square;
}

override function getX() : Integer
{
return positionX;
}

override function getY() : Integer
{
return positionY;
}

override function isOccupied() : Boolean
{
return (content != null);
}
}

Any help at all would be greatly appreciated.

Many thanks,
Lee