Hi! > Thanks for the code. > However, it does not draw anything. I assume the draw rectangle need to be > done in draw_cb() so I added this code in > cairo_set_source_surface(cr, surface, 0, 0); > > cairo_set_source_rgb(cr, 0, 1, 0); > cairo_rectangle(cr, 300, 300, 200, 200); > cairo_stroke(cr); > cairo_paint(cr); > > but it still does not draw any rectangle. Do I not need to have "expose" > handler to draw? What version of GTK+ are you using? Simple app I sent to you uses version 3 and will not work properly with version 2. If you're using GTK+ version 2, you'll need to make some minor changes (replace "draw" signal with "expose-event" signal, update draw callback prototype and manually create cairo context for GTkDrawingArea's GdkWindow). > Also, I would like to know how to render contents from main window AND from > offscreen both together on main visible window > say, a primitive (Rectangle) on main window and another primitive (circle) > from offscreen? Could you please show me how? Not sure what is giving you trouble here. Drawing from offscreen is done by two simple function calls: cairo_set_source_surface() and cairo_paint(). If you need something else drawn onto your widgets, simply draw that from inside draw (or expose-event for GTK+ 2.x) callbackusing cairo drawing functions. Cheers, Tadej -- Tadej Borovšak blog.borovsak.si tadeboro@xxxxxxxxx tadej.borovsak@xxxxxxxxx _______________________________________________ gtk-list mailing list gtk-list@xxxxxxxxx https://mail.gnome.org/mailman/listinfo/gtk-list
