sync to keep working

src/system/include/pw/system/window.hpp

@@ -5,11 +5,15 @@
 #include <pw/core/size.hpp>
 #include <pw/core/point.hpp>
 
+#include <functional>
+
 namespace pw {
 
 class window {
 public:
 
+    typedef std::function<void(window&)> on_update_t;
+
     window();
     ~window();
 
@@ -28,9 +32,12 @@ public:
     bool fullscreen() const;
     void set_fullscreen(bool use_fullscreen);
 
+    void set_on_update(on_update_t f) { _on_update = f; }
 
 protected:
 
+    on_update_t _on_update;
+
 	struct impl;
 	std::unique_ptr<impl> _impl;
 

src/system/src/window.cpp

@@ -39,6 +39,8 @@ namespace pw {
 
 struct window::impl {
 
+    window& _parent;
+
     GLFWwindow *_window = nullptr;
 
     sizei _old_size;
@@ -125,7 +127,8 @@ struct window::impl {
 
 	}
 
-    impl()
+    impl(window& w)
+        : _parent(w)
     {
 		// initialize
         glfwInit();
@@ -190,6 +193,9 @@ struct window::impl {
             // get new events
             glfwPollEvents();
 
+            _parent._on_update(_parent);
+
+
             // do other stuff
 #if 0
             glClearColor(1,0,0,1);
@@ -270,7 +276,8 @@ struct window::impl {
 
 
 window::window()
-    : _impl(std::make_unique<window::impl>())
+    : _impl(std::make_unique<window::impl>(*this))
+    , _on_update([](window&){})
 {
 }