void
CellRendererColorSelector::render_vfunc (const Glib::RefPtr<Gdk::Drawable>& window, Gtk::Widget& /*widget*/, const Gdk::Rectangle& /*background_area*/, const Gdk::Rectangle& cell_area, const Gdk::Rectangle& expose_area, Gtk::CellRendererState /*flags*/)
{
- cairo_t* cr = gdk_cairo_create (window->gobj());
- double r, g, b;
Gdk::Color c = _property_color.get_value();
- cairo_rectangle (cr, expose_area.get_x(), expose_area.get_y(), expose_area.get_width(), expose_area.get_height());
- cairo_clip (cr);
-
- r = c.get_red_p();
- g = c.get_green_p();
- b = c.get_blue_p();
-
- cairo_rectangle_t drawing_rect;
-
- drawing_rect.x = cell_area.get_x() + property_xpad();
- drawing_rect.y = cell_area.get_y() + property_ypad();
- drawing_rect.width = cell_area.get_width() - (2 * property_xpad());
- drawing_rect.height = cell_area.get_height() - (2 * property_ypad());
-
- Gtkmm2ext::rounded_rectangle (cr, drawing_rect.x, drawing_rect.y, drawing_rect.width, drawing_rect.height, 5);
- cairo_set_source_rgb (cr, r, g, b);
- cairo_fill (cr);
-
- cairo_destroy (cr);
+ if (c.gobj() != 0) {
+
+ cairo_t* cr = gdk_cairo_create (window->gobj());
+ double r, g, b;
+ Gdk::Color c = _property_color.get_value();
+
+ cairo_rectangle (cr, expose_area.get_x(), expose_area.get_y(), expose_area.get_width(), expose_area.get_height());
+ cairo_clip (cr);
+
+ r = c.get_red_p();
+ g = c.get_green_p();
+ b = c.get_blue_p();
+
+ cairo_rectangle_t drawing_rect;
+
+ drawing_rect.x = cell_area.get_x() + property_xpad();
+ drawing_rect.y = cell_area.get_y() + property_ypad();
+ drawing_rect.width = cell_area.get_width() - (2 * property_xpad());
+ drawing_rect.height = cell_area.get_height() - (2 * property_ypad());
+
+ Gtkmm2ext::rounded_rectangle (cr, drawing_rect.x, drawing_rect.y, drawing_rect.width, drawing_rect.height, 5);
+ cairo_set_source_rgb (cr, r, g, b);
+ cairo_fill (cr);
+
+ cairo_destroy (cr);
+ }
}