2 files changed, 19 insertions, 5 deletions
diff --git a/src/main/engine/engine.c b/src/main/engine/engine.c
index d8314c9..0a4d81d 100644
--- a/src/main/engine/engine.c
+++ b/src/main/engine/engine.c
@@ -58,7 +58,13 @@ static int frames;
 static time_t end;
 
 void (*dispatch_ui_event)(int);
-void (*on_mouse_button_pressed)(float x, float y);
+
+typedef struct MouseButtonEvent {
+	void (*on_mouse_button_pressed)(float x, float y, void *data);
+	void *data;
+} MouseButtonEvent;
+
+MouseButtonEvent *mouse_button_event;
 
 void
 engine_init(int w, int h)
@@ -254,13 +260,21 @@ mouse_button_press_event(UIMouseButtonPressed *mbp)
 	float oglX = engine->ortho_left + ((float) mbp->x / width) * (engine->ortho_right - engine->ortho_left);
 	float oglY = engine->ortho_top - ((float) mbp->y / height) * (engine->ortho_top - engine->ortho_bottom);
 
-	on_mouse_button_pressed(oglX, oglY);
+	mouse_button_event->on_mouse_button_pressed(oglX, oglY, mouse_button_event->data);
 }
 
 void
-engine_set_mouse_button_listener(void (*event)(float x, float y))
+engine_set_mouse_button_listener(void (*event)(float x, float y, void *data), void *data)
 {
-	on_mouse_button_pressed = event;
+	mouse_button_event = malloc(sizeof(MouseButtonEvent));
+	if (mouse_button_event == NULL) {
+		log_error("Error allocating mouse button event");
+		exit(EXIT_FAILURE);
+	}
+
+	mouse_button_event->on_mouse_button_pressed = event;
+	mouse_button_event->data = data;
+
 	ui_set_mouse_press_listener(mouse_button_press_event);
 }
 
diff --git a/src/main/engine/engine.h b/src/main/engine/engine.h
index 624bc44..3c75d1a 100644
--- a/src/main/engine/engine.h
+++ b/src/main/engine/engine.h
@@ -29,6 +29,6 @@ void engine_draw_circle(float cx, float cy, float r, int num_segments, int outli
 void engine_draw_line(float x1, float y1, float x2, float y2);
 void engine_loop(void);
 void engine_input(void (*f_input)(int engine_input));
-void engine_set_mouse_button_listener(void (*event)(float x, float y));
+void engine_set_mouse_button_listener(void (*event)(float x, float y, void *data), void *data);
 
 #endif /* __ENGINE_H__ */