Merge pull request #251 from x-qq/fix_scrollbar_segfaults

fix for scrollbar segfaults

* fixes #206
* fixes broken mousewheel scrolling of the scenedit palette
* removed boost threads dependency
* added foundation for further refactoring of the drawing and event handling code: interfaces and drawable manager with layering
* removed a bunch of unneeded redraw calls
* removed some repeated recalculation of effectively constant values (boe.actions)
* removed recalculation of effectively constant scrollbar and button positions (boe.graphics)

Closes #251

src/scenedit/scen.menus.linux.cpp

@@ -1,16 +1,26 @@
+#include "scen.global.hpp"
 #include "scen.menus.hpp"
 #include <SFML/Graphics/RenderWindow.hpp>
 #include <memory>
+#include <unordered_map>
+#include <string>
 #include "scen.menu.hpp"
 #include "undo.hpp"
+#include "event_listener.hpp"
+#include "drawable_manager.hpp"
 
 extern sf::RenderWindow mainPtr;
 extern cUndoList undo_list;
+extern std::unordered_map <std::string, std::shared_ptr <iEventListener>> event_listeners;
+extern cDrawableManager drawable_mgr;
 
 std::shared_ptr <OpenBoESceneditMenu> menu_ptr;
 
 void init_menubar() {
 	menu_ptr.reset(new OpenBoESceneditMenu(mainPtr));
+	
+	event_listeners["menubar"] = std::dynamic_pointer_cast <iEventListener> (menu_ptr); 
+	drawable_mgr.add_drawable(UI_LAYER_MENUBAR, "menubar", menu_ptr); 
 }
 
 void shut_down_menus(short mode) {
@@ -21,13 +31,5 @@ void update_edit_menu() {
 	menu_ptr->update_edit_menu(undo_list);
 }
 
-bool menuBarProcessEvent(const sf::Event& event) {
-	return menu_ptr->handle_event(event);
-}
-
-void drawMenuBar() {
-	menu_ptr->draw();
-}
-
 void set_up_apple_events(int argc, char* argv[]) {
 }