Write to PGraphics in class

jeffthompson

I'd like to build a class that contains a PGraphics object and write to it from outside the class (in setup(), draw(), etc). I can do this now, but it's clunky:

thing.pg.beginDraw();
thing.pg.rect(0,0, 10,10);
thing.pg.endDraw();

I'd like to be able to do something more like this:

thing.beginDraw();
thing.rect(0,0, 10,10);
thing.endDraw();

I know I can create new functions for rect(), etc inside the class, but that's ugly. I found this post, which offers some hope, but not sure how to make it work in my case.

colouredmirrorball

You can make your class extend PGraphics, provided you can make it somehow fit into your class scheme.

GoToLoop

http://forum.Processing.org/two/discussions/tagged/pgraphicsjava2d

jeffthompson

Thanks both of you – I did see the "layer" post that GoToLoop posted. But the thread is very confusing and I don't have much experience with extending classes. Could you show me a very simple class that does this?

(For example, the exampled linked to above also gets the parent applet and does some other stuff – is that necessary too?)

GoToLoop

• That utility method getEnclosingPApplet() isn't necessary.
• It's just a hack to avoid requesting the sketch's PApplet reference.
• Method ignite() can also go away too.
• But as I said back then, that Layer class wasn't meant to be understood.
• Rather to be moved to a separate tab and stay hidden from view.
• For it is just a base to make our own PGraphicsJava2D based subclasses.
• And also a replacement for what createGraphics() actually does underneath it.
• For a basic subclass example, take a look @ CustomPGraph:
  https://forum.Processing.org/two/discussion/6884/question-about-pgraphics#Item_3