added run loop actions

Application.cpp

@@ -8,6 +8,7 @@
 
 #include "Application.hpp"
 #include "Window.hpp"
+#include <algorithm>
 
 using namespace sc::gui;
 
@@ -19,8 +20,11 @@ void Application::run() {
         for (const Window& window : Window::windows()) {
             window.update();
         }
+        for (RunLoopAction action : _actions) {
+            action();
+        }
         SDL_Event event;
-        if (SDL_WaitEvent(&event)) {
+        if (SDL_PollEvent(&event)) {
             switch (event.type) {
                 case SDL_QUIT:
                     quit = true;
@@ -55,3 +59,11 @@ bool Application::handle_event(const SDL_Event& event) {
     }
     return quit;
 }
+
+void Application::add_run_loop_action(RunLoopAction action) {
+    _actions.push_back(action);
+}
+
+void Application::remove_run_loop_action(RunLoopAction action) {
+    _actions.erase(std::remove(_actions.begin(), _actions.end(), action), _actions.end());
+}

Application.hpp

@@ -16,6 +16,7 @@
 namespace sc {
     namespace gui {
         using EventHandler = bool(*)(const SDL_Event&);
+        using RunLoopAction = void(*)();
 
         class Application {
             public:
@@ -32,11 +33,14 @@ namespace sc {
 
                 void run();
                 void add_event_handler(EventHandler handler, SDL_EventType event);
+                void add_run_loop_action(RunLoopAction action);
+                void remove_run_loop_action(RunLoopAction action);
 
             private:
                 static Application app;
 
                 std::map<SDL_EventType, std::vector<EventHandler>> _event_handlers;
+                std::vector<RunLoopAction> _actions;
 
                 bool handle_event(const SDL_Event& event);
         };