Graph-Widget not behaving well in GTK 3+
Right off the bat, I run Ubuntu 16.04 and have downloaded the necessary packages. I am working on creating a GUI where one of the widgets is Graph-Widget in addition to a few others that I am creating. When I place Graph-Widget in the window directly, I see it fine and it works properly. When I put it inside a table, however, I only see a blank (white) window with nothing. If I add some other widget to the table in the window, I just see that widget. When I place a Graph-Widget inside a Box in the window, I see it fine. But if I add another widget in the Box, I can't see my widget anymore. This is the only widget that I have used so far that has this weird behavior and so it effectively means that I can't have any widgets in a window with Graph-Widget (since I can only add one overall item - like a box or grid - to the window). Am I doing something wrong or can I not use more than one widget in the window (in which case, why does the widget exist?).