Drawing ???

[Sergei Naumov <serge astro unc edu>]

Hi!
I am trying to draw in the drawing area but from what is written in the
example scribble, it is not clear to me what one should do if he wants to
draw a line or a circle or whatever. The code has gdk_draw_rectangle() and
gtk_widget_draw(). What does the second do?

One more thing. What event should I catch when a slider changes the value?
I am writing an application which has to redraw the screen when a user changes
values controlled by sliders.

Thanks,
		Sergei