menu/container: add window_coords_change

The children container of a container have to be notified if the
window coordinates of the parent changed. The children have to
recalculate their own window coordinates.

1 files changed, 14 insertions, 0 deletions

diff --git a/src/menu/container.hpp b/src/menu/container.hpp
index ac7d6129..f9eeacd5 100644
--- a/src/menu/container.hpp
+++ b/src/menu/container.hpp
@@ -26,6 +26,7 @@
 #define CONTAINER_HPP
 
 #include <list>
+#include <boost/signals2.hpp>
 #include <log4cpp/Category.hh>
 
 #include "drawable_control.hpp"
@@ -51,6 +52,14 @@ namespace usdx
 		Point<int> window_coords;
 		void recalculate_window_coords(void);
 
+		/**
+		 * Connection to recieve window coordinate changes from parent
+		 * container.
+		 */
+		boost::signals2::connection window_coords_connection;
+
+		void init(Container* parent);
+
 	protected:
 		Container(Container*, const ContainerHelper&);
 
@@ -95,6 +104,11 @@ namespace usdx
 		 * @see window_coords
 		 */
 		virtual void set_size(int width, int height);
+
+		/**
+		 * This signal gets emitted, if the window coordinates are changed.
+		 */
+		boost::signals2::signal<void ()> window_coords_change;
 	};
 };