From: Joe Van Dyk <joe.vandyk@...>
Date: 2004-11-17T08:33:19+09:00
Subject: Drawing in a GUI

So, I have a bunch of objects that are responsible for drawing on something
on the screen (in this case, a GnomeCanvas object).

Say I need to have a grid drawn on this canvas.  In order to draw a line, I
need to call Gnome::CanvasLine with a reference to the GnomeCanvas I want to
draw on (and various other details about the line).

If I have a Grid class

class Grid
  def draw_grid
    ...
  end
end

How should I tell Grid what GnomeCanvas to draw on?  Pass it in when it's
initialized?  For some reason, that doesn't seem like the best thing to do.

Any ideas?