nifty-gui

In a previous blog post I’ve talked about that composition/delegation has some benefits over inheritance. Today I realized that I actually was right

As I was playing around in Nifty I’ve noticed that my TextElements don’t support coloured backgrounds. As a matter of fact the TextRenderer just didn’t support it. The first thought was to simply add this feature. But then I realized that the missing functionality was right there in front of me. I already implemented backgroundColor (and even backgroundImage) for Panels in the PanelRenderer.

So it occurred to me that I only have to combine them both in some nifty composition and be done.

So I’ve just changed the Element class to support not only a single ElementRenderer but several! And by the way I discovered the “varargs declaration” in Java:

public Element(
    final String newId,
    final Element newParent,
    final ElementRenderer ... newElementRenderer) {
  ...
}

You can use it this way:

Element element = new Element("myId", parent, new PanelRenderer(), new TextRenderer());

Nifty indeed

This entry was posted on Tuesday, January 22nd, 2008 at 1:12 am and is filed under design. You can follow any responses to this entry through the RSS 2.0 feed. You can leave a response, or trackback from your own site.