Thanks for the amazingly quick and completely correct reply. Cheers Stephen <div>On 9/21/07, Matthew Flatt <<a href="mailto:mflatt@cs.utah.edu"> mflatt@cs.utah.edu</a>> wrote:<blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">At Fri, 21 Sep 2007 14:35:04 +0100, "Stephen De Gabrielle" wrote: > I'm trying my hand at making a simple widget. > > I've done something wrong and it is twice as high as it should be. > > Please look at my code below and let me know where I have gone wrong. You are creating four widgets: * A frame that contains      * A pane (of min height 200)      * A pane that contains          * A canvas (of min height 200) Since the canvas is not nested in the first pane, the frame is constrained to be 400 pixels tall. I think you probably meant to make the canvas a child of the first pane, instead of having two panes. To do that, move the `super-instantiate' for the enclosing pane% class to before the creation of the canvas% instance, and get rid of the `pane' definition, and change the `parent' canvas% argument from `pane' to `this'. Matthew </blockquote></div> -- Cheers, Stephen -- Stephen De Gabrielle <a href="mailto:s.degabrielle@ucl.ac.uk">s.degabrielle@ucl.ac.uk</a> Telephone +44 (0)20 7679 5242 (x45242) Mobile                  079 851 890 45 <a href="http://www.uclic.ucl.ac.uk/annb/MaSI.html">http://www.uclic.ucl.ac.uk/annb/MaSI.html</a> University College London Interaction Centre Remax House - 31/32 Alfred Place London - WC1E 7DP