David Allen wrote:
> I have a group that fills the main window. The resizable widget of the group
> is a drawing area where geometric concepts are illustrated; the lengths of
> its horizontal side and vertical side must remain in a fixed ratio.
>
> When I move the right edge of the main window, I would like for the bottom
> edge of the main window to automatically change accordingly.
> Similarly, if I move the bottom edge of the main window ...
>
> I would appreciate hints as to how to do this. Maybe even point me to an
> example where something similar is done.
You should be able to do this by overriding the resize() method
(derive a class from Fl_Window or Fl_Double_Window).
That method is passed the xywh values which you can then
reinterpret to do anything you like to change the xywh values,
and then pass them on down to Fl_Window::resize(x,y,w,h) to
do the actual sizing.
I don't have a simple example of just that, but assuming
you know how to derive from Fl_Window and override methods,
it should be easy.
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