2 files changed, 11 insertions, 0 deletions
diff --git a/src/main/engine/ui/ui.h b/src/main/engine/ui/ui.h
index 06cd515..95604d7 100644
--- a/src/main/engine/ui/ui.h
+++ b/src/main/engine/ui/ui.h
@@ -23,6 +23,7 @@
 void ui_init(int w, int h);
 void ui_loop(void);
 void ui_set_title(const char *title);
+void ui_set_expose_listener(void (*expose_event)());
 void ui_set_loop_listener(void (*event)());
 void ui_set_mouse_press_listener(void (*event)());
 void ui_set_generic_listener(void (*generic_event)(int type));
diff --git a/src/main/engine/ui/x11/ui.c b/src/main/engine/ui/x11/ui.c
index 76adaac..412f67d 100644
--- a/src/main/engine/ui/x11/ui.c
+++ b/src/main/engine/ui/x11/ui.c
@@ -32,6 +32,7 @@ static GLXContext gl_context;
 static int close_window = 0;
 
 void (*on_loop_event)();
+void (*on_expose_event)();
 void (*on_mouse_press_event)();
 void (*on_generic_event)(int);
 
@@ -113,6 +114,9 @@ static void
 ui_on_expose(XEvent event)
 {
 	if (event.type != Expose) return;
+	if (on_expose_event != NULL) {
+		on_expose_event();
+	}
 }
 
 static void
@@ -159,6 +163,12 @@ ui_set_loop_listener(void (*loop_event)())
 }
 
 void
+ui_set_expose_listener(void (*expose_event)())
+{
+	on_expose_event = expose_event;
+}
+
+void
 ui_set_mouse_press_listener(void (*mouse_press_event)())
 {
 	on_mouse_press_event = mouse_press_event;