- Glib::RefPtr<Gdk::Window> win (w.get_window());
- Glib::RefPtr<Gdk::GC> fg_gc (w.get_style()->get_fg_gc (Gtk::STATE_NORMAL));
- Glib::RefPtr<Gdk::GC> bg_gc (w.get_style()->get_bg_gc (Gtk::STATE_NORMAL));
- gint width, height;
- int db_points[] = { -50, -40, -20, -30, -10, -3, 0, 4 };
- char buf[32];
-
- win->get_size (width, height);
-
- Glib::RefPtr<Gdk::Pixmap> pixmap = Gdk::Pixmap::create (win, width, height);
-
- metric_pixmaps[w.get_name()] = pixmap;
-
- pixmap->draw_rectangle (bg_gc, true, 0, 0, width, height);
-
- Glib::RefPtr<Pango::Layout> layout = w.create_pango_layout("");
-
- for (uint32_t i = 0; i < sizeof (db_points)/sizeof (db_points[0]); ++i) {
-
- float fraction = log_meter (db_points[i]);
- gint pos = height - (gint) floor (height * fraction);
-
- snprintf (buf, sizeof (buf), "%d", abs (db_points[i]));
-
- layout->set_text (buf);
-
- /* we want logical extents, not ink extents here */
-
- int width, height;
- layout->get_pixel_size (width, height);
-
- pixmap->draw_line (fg_gc, 0, pos, 4, pos);
- pixmap->draw_layout (fg_gc, 6, pos - (height/2), layout);