obtaining current viewport/scrolled window dimensions

[James Morris <jwm art net gmail com>]

Hi,

I have a GtkDrawingArea within a GtkViewport within a
GtkScrolledWindow. I need the viewport dimensions so I can center the
contents of the drawing area when the drawn contents are smaller than
the viewport/window. There is a vague mention of "page_size" in the
documentation for scrolled window but no other clues.

How do I get these dimensions please?

Cheers,
James.


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