Change background color when mouse over

["Germán Diago" <germandiago gmail com>]

Hello. I'm implementing a custom widget, which is a Gtk::VBox and
contains a Gtk::Image and a label.

I want the widget to change color when the mouse goes over it (I just
want to change the VBox zone)
Looking at the documentation I found a way to change the color for
Gtk::VBox with a Gtk::EventBox, but
I don't know how to color it just when the mouse goes over it.

Any help, please?

Here is the code:

class PhotoTile : public Gtk::VBox
{
	private:
		Gtk::VBox box_;
		Gtk::Image image_;
		Gtk::Label label_;
		Gtk::EventBox evtbox_;

		std::string imagename_;

	public:

		PhotoTile()
		{
			box_.set_spacing(12);
			box_.set_border_width(12);
			evtbox_.add(box_);

			
			evtbox_.modify_bg(Gtk::STATE_NORMAL, Gdk::Color("blue"));
		}

		void setImage(const std::string & imagepath)
		{
			image_.set(imagepath);
			box_.pack_start(image_, false, false);
			
			imagename_ = std::string(Glib::path_get_basename(imagepath), 0,
			Glib::path_get_basename(imagepath).find_last_of('.'));
			
			label_.set_text("<b>" + imagename_ + "</b>");
			label_.set_use_markup(true);
			
			box_.pack_start(label_, false, false);

			pack_start(evtbox_, false, false);
			show_all();
		}
};

And thanks for your time.