gtkscrolledwindow resize atomatic

[Alexandre <alpebu yahoo com br>]

  I have a gtkplotcanvas (from gtkextra) inside a
viewport that  is inside a scrolledwindow, but, when I
resize the gtkplotcanvas to a size bigger than the
scrolledwindow the scrollbars still the same (don't
change), and I'm not able to view all the
gtkplotcanvas..

  Any help? .. thanks

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