diff --git a/game/src/ui/uiman.c b/game/src/ui/uiman.c
index 1c22a89..bfd043e 100644
--- a/game/src/ui/uiman.c
+++ b/game/src/ui/uiman.c
@@ -62,6 +62,18 @@ uiman_render ()
   Widget_render (ui_root, projection, sdl_window_h);
 }
 
+static inline gboolean
+_uiman_call_on_event (Widget *widget, WidgetEvent event)
+{
+  if (widget && widget->on_event[event])
+    {
+      widget->on_event[event] (widget, widget->event_data[event]);
+      return TRUE;
+    }
+
+  return FALSE;
+}
+
 gboolean
 uiman_cb_switch_focus (SDL_Event *event, void *data)
 {
@@ -103,108 +115,46 @@ uiman_cb_mouse_motion (SDL_Event *event, void *data)
 
   if (new_hover != hovered_widget)
     {
-      if (hovered_widget && hovered_widget->on_mouse_leave)
-	{
-	  hovered_widget->on_mouse_leave (hovered_widget, hovered_widget->mouse_leave_data);
-	}
-      
-      if (new_hover && new_hover->on_mouse_enter)
-	{
-	  new_hover->on_mouse_enter (new_hover, new_hover->mouse_enter_data);
-	}
-      
+      _uiman_call_on_event (hovered_widget, EVENT_MOUSE_LEAVE);
+      _uiman_call_on_event (new_hover, EVENT_MOUSE_ENTER);
       hovered_widget = new_hover;
     }
 
-  if (hovered_widget && hovered_widget->on_mouse_move)
-    {
-      hovered_widget->on_mouse_move (hovered_widget, hovered_widget->mouse_move_data);
-    }
+  _uiman_call_on_event (hovered_widget, EVENT_MOUSE_MOVE);
   
   /* This callback always eats the event, because why would the game
      need mouse motion if the UI has stolen the focus? */
   return TRUE;
 }
 
-gboolean widget_match_bdown (Widget *self) { return self->on_left_down || self->on_right_down; };
 gboolean
 uiman_cb_button_down (SDL_Event *event, void *data)
 {
   UNUSED (data);
-  
-  Widget *widget = Widget_find_xy_matching (ui_root, (vec2) { event->button.x, event->button.y }, widget_match_bdown);
 
-  if (widget)
-    {
-      if (event->button.button == SDL_BUTTON_LEFT && widget->on_left_down)
-	{
-	  widget->on_left_down (widget, widget->left_down_data);
-	  return TRUE;
-	}
-
-      if (event->button.button == SDL_BUTTON_RIGHT && widget->on_right_down)
-	{
-	  widget->on_right_down (widget, widget->right_down_data);
-	  return TRUE;
-	}
-    }
-  
-  return FALSE;
+  WidgetEvent e = event->button.button == SDL_BUTTON_LEFT ? EVENT_LEFT_DOWN : EVENT_RIGHT_DOWN;
+  Widget *widget = Widget_find_xy_event (ui_root, (vec2) { event->button.x, event->button.y }, e);
+  return _uiman_call_on_event (widget, e);
 }
 
-gboolean widget_match_bup (Widget *self) { return self->on_left_up || self->on_right_up; };
 gboolean
 uiman_cb_button_up (SDL_Event *event, void *data)
 {
   UNUSED (data);
 
-  Widget *widget = Widget_find_xy_matching (ui_root, (vec2) { event->button.x, event->button.y }, widget_match_bup);
-
-  if (widget)
-    {
-      if (event->button.button == SDL_BUTTON_LEFT && widget->on_left_up)
-	{
-	  widget->on_left_up (widget, widget->left_up_data);
-	  return TRUE;
-	}
-
-      if (event->button.button == SDL_BUTTON_RIGHT && widget->on_right_up)
-	{
-	  widget->on_right_up (widget, widget->right_up_data);
-	  return TRUE;
-	}
-    }
-  
-  return FALSE;
+  WidgetEvent e = event->button.button == SDL_BUTTON_LEFT ? EVENT_LEFT_UP : EVENT_RIGHT_UP;
+  Widget *widget = Widget_find_xy_event (ui_root, (vec2) { event->button.x, event->button.y }, e);
+  return _uiman_call_on_event (widget, e); 
 }
 
-gboolean widget_match_scroll (Widget *self) { return self->on_scroll_down || self->on_scroll_up; };
 gboolean
 uiman_cb_mouse_wheel (SDL_Event *event, void *data)
 {
   UNUSED (event, data);
 
-  Widget *widget = Widget_find_xy_matching (ui_root, (vec2) { event->wheel.mouse_x, event->wheel.mouse_y }, widget_match_scroll);
-
-  if (widget)
-    {
-      if (event->wheel.y > 0)
-	{
-	  if (widget->on_scroll_up)
-	    {
-	      widget->on_scroll_up (widget, widget->scroll_up_data);
-	    }
-	}
-      else
-	{
-	  if (widget->on_scroll_down)
-	    {
-	      widget->on_scroll_down (widget, widget->scroll_down_data);
-	    }
-	}
-    }
-  
-  return FALSE;
+  WidgetEvent e = event->wheel.y > 0 ? EVENT_SCROLL_UP : EVENT_SCROLL_DOWN;
+  Widget *widget = Widget_find_xy_event (ui_root, (vec2) { event->wheel.mouse_x, event->wheel.mouse_y }, e);
+  return _uiman_call_on_event (widget, e);
 }
 
 gboolean
diff --git a/game/src/ui/widget.c b/game/src/ui/widget.c
index 6210a89..c0df479 100644
--- a/game/src/ui/widget.c
+++ b/game/src/ui/widget.c
@@ -90,47 +90,18 @@ Widget_add_child_weighed (Widget *parent, Widget *child, float layout_weight)
 
 void
 Widget_set_on_tick (Widget *widget,
-		    void (*on_tick) (Widget *, void *),
-		    void *userdata)
+		    void (*on_tick) (Widget *, void *), void *userdata)
 {
   widget->on_tick = on_tick;
   widget->tick_data = userdata;
 }
 
 void
-Widget_set_on_left_up (Widget *widget,
-		       void (*on_left_up) (Widget *, void *),
-		       void *userdata)
+Widget_set_on_event (Widget *widget, WidgetEvent event,
+		     void (*on_event) (Widget *, void *), void *userdata)
 {
-  widget->on_left_up = on_left_up;
-  widget->left_up_data = userdata;
-}
-
-void
-Widget_label_set_text (Widget *widget, const char *text)
-{
-  g_string_overwrite (widget->label.text, 0, text);
-}
-
-void
-Widget_label_printf (Widget *widget, const char *format, ...)
-{
-  va_list args;
-  va_start (args, format);
-  g_string_vprintf (widget->label.text, format, args);
-  va_end (args);
-}
-
-void
-Widget_scrollable_scroll (Widget *widget, vec2 direction)
-{
-  glm_vec2_muladds (direction, widget->scrollable.scroll_amount, widget->scrollable.scroll_position);
-  widget->scrollable.scroll_position[0] =
-    glm_clamp (widget->scrollable.scroll_position[0], 0.0f,
-	       glm_max (0.0f, widget->scrollable.content_size[0] - widget->size[0]));
-  widget->scrollable.scroll_position[1] =
-    glm_clamp (widget->scrollable.scroll_position[1], 0.0f,
-	       glm_max (0.0f, widget->scrollable.content_size[1] - widget->size[1]));
+  widget->on_event[event] = on_event;
+  widget->event_data[event] = userdata;
 }
 
 gboolean
@@ -149,7 +120,7 @@ Widget_hit_test (Widget *widget, vec2 point)
 }
 
 Widget *
-Widget_find_xy_matching (Widget *widget, vec2 pos, gboolean (*match_fn) (Widget *widget))
+Widget_find_xy_event (Widget *widget, vec2 pos, WidgetEvent event)
 {
   if (!widget->visible)
     {
@@ -172,7 +143,7 @@ Widget_find_xy_matching (Widget *widget, vec2 pos, gboolean (*match_fn) (Widget
   for (int i = widget->children->len - 1; i >= 0; --i)
     {
       Widget *child = g_array_index (widget->children, Widget *, i);
-      Widget *found = Widget_find_xy_matching (child, pos_scrolled, match_fn);
+      Widget *found = Widget_find_xy_event (child, pos_scrolled, event);
       
       if (found != NULL)
 	{
@@ -180,7 +151,7 @@ Widget_find_xy_matching (Widget *widget, vec2 pos, gboolean (*match_fn) (Widget
 	}
     }
 
-  if (!match_fn || match_fn (widget))
+  if (event == EVENT_NONE || widget->on_event[event])
     {
       return widget;
     }
@@ -191,7 +162,7 @@ Widget_find_xy_matching (Widget *widget, vec2 pos, gboolean (*match_fn) (Widget
 Widget *
 Widget_find_xy (Widget *widget, vec2 pos)
 {
-  return Widget_find_xy_matching (widget, pos, NULL);
+  return Widget_find_xy_event (widget, pos, EVENT_NONE);
 }
 
 void
@@ -504,6 +475,33 @@ Widget_render (Widget *widget, mat4 projection, int window_height)
     }
 }
 
+void
+Widget_label_set_text (Widget *widget, const char *text)
+{
+  g_string_overwrite (widget->label.text, 0, text);
+}
+
+void
+Widget_label_printf (Widget *widget, const char *format, ...)
+{
+  va_list args;
+  va_start (args, format);
+  g_string_vprintf (widget->label.text, format, args);
+  va_end (args);
+}
+
+void
+Widget_scrollable_scroll (Widget *widget, vec2 direction)
+{
+  glm_vec2_muladds (direction, widget->scrollable.scroll_amount, widget->scrollable.scroll_position);
+  widget->scrollable.scroll_position[0] =
+    glm_clamp (widget->scrollable.scroll_position[0], 0.0f,
+	       glm_max (0.0f, widget->scrollable.content_size[0] - widget->size[0]));
+  widget->scrollable.scroll_position[1] =
+    glm_clamp (widget->scrollable.scroll_position[1], 0.0f,
+	       glm_max (0.0f, widget->scrollable.content_size[1] - widget->size[1]));
+}
+
 /* --------- */
 
 LabelFormatData *
@@ -689,27 +687,12 @@ Widget_composite_spinner_make_int (const char *fmt, int *ptr)
   Widget *label = Widget_label_make_int (fmt, ptr, TEXT_ALIGN_CENTER);
   Widget *right = Widget_plain_new ();
 
-  Widget_set_on_left_up (left, uicb_decrement_int, ptr);
+  Widget_set_on_event (left, EVENT_LEFT_UP, uicb_decrement_int, ptr);
   left->icon = ICON_SPINNER_LEFT;
   left->aspect_ratio = 1.0;
-  Widget_set_on_left_up (right, uicb_increment_int, ptr);
+  Widget_set_on_event (right, EVENT_LEFT_UP, uicb_increment_int, ptr);
   right->icon = ICON_SPINNER_RIGHT;
   right->aspect_ratio = 1.0;
-
-  vec4 *enter_color = g_new (vec4, 1);
-  glm_vec4_copy ((vec4) { 1, 1, 1, 0.3 }, *enter_color);
-  vec4 *leave_color = g_new (vec4, 1);
-  glm_vec4_copy ((vec4) { 1, 1, 1, 0.0 }, *leave_color);
-
-  left->on_mouse_enter = uicb_set_background;
-  left->on_mouse_leave = uicb_set_background;
-  right->on_mouse_enter = uicb_set_background;
-  right->on_mouse_leave = uicb_set_background;
-  
-  left->mouse_enter_data = enter_color;
-  left->mouse_leave_data = leave_color;
-  right->mouse_enter_data = enter_color;
-  right->mouse_leave_data = leave_color;
   
   Widget_add_child_weighed (cont, left, 1);
   Widget_add_child_weighed (cont, label, 1);
@@ -729,18 +712,7 @@ Widget_composite_checkbox_make (const char *label, char *flag)
   box->icon = ICON_CHECKBOX_UNCHECKED;
   box->aspect_ratio = 1.0;
   Widget_set_on_tick (box, uicb_checkbox_show_flag, flag);
-  Widget_set_on_left_up (box, uicb_switch_flag, flag);
-  
-  box->on_mouse_enter = uicb_set_background;
-  box->on_mouse_leave = uicb_set_background;
-
-  vec4 *enter_color = g_new (vec4, 1);
-  glm_vec4_copy ((vec4) { 1, 1, 1, 0.3 }, *enter_color);
-  vec4 *leave_color = g_new (vec4, 1);
-  glm_vec4_copy ((vec4) { 1, 1, 1, 0.0 }, *leave_color);
-
-  box->mouse_enter_data = enter_color;
-  box->mouse_leave_data = leave_color;
+  Widget_set_on_event (box, EVENT_LEFT_UP, uicb_switch_flag, flag);
   
   Widget_add_child_weighed (cont, box, 1);
   Widget_add_child_weighed (cont, Widget_label_new (label, TEXT_ALIGN_LEFT), 1);
diff --git a/game/src/ui/widget.h b/game/src/ui/widget.h
index 34b713f..28963fc 100644
--- a/game/src/ui/widget.h
+++ b/game/src/ui/widget.h
@@ -36,6 +36,20 @@ typedef enum WidgetIcon
     ICON_ARROW_DOWN
   } WidgetIcon;
 
+typedef enum WidgetEvent
+  {
+    EVENT_NONE = -1,		/* Don't use. */
+    EVENT_LEFT_DOWN = 0,
+    EVENT_LEFT_UP,
+    EVENT_RIGHT_DOWN,
+    EVENT_RIGHT_UP,
+    EVENT_MOUSE_ENTER,
+    EVENT_MOUSE_LEAVE,
+    EVENT_MOUSE_MOVE,
+    EVENT_SCROLL_UP,
+    EVENT_SCROLL_DOWN
+  } WidgetEvent;
+
 typedef struct ContainerWidget
 {
   gboolean horizontal;
@@ -107,29 +121,11 @@ typedef struct Widget
   float border_width;
   vec4 border_color;
 
-  void (*on_left_down) (struct Widget *, void *);
-  void *left_down_data;
-  void (*on_left_up) (struct Widget *, void *);
-  void *left_up_data;
-  void (*on_right_down) (struct Widget *, void *);
-  void *right_down_data;
-  void (*on_right_up) (struct Widget *, void *);
-  void *right_up_data;
-
-  void (*on_mouse_enter) (struct Widget *, void *);
-  void *mouse_enter_data;
-  void (*on_mouse_leave) (struct Widget *, void *);
-  void *mouse_leave_data;
-  void (*on_mouse_move) (struct Widget *, void *);
-  void *mouse_move_data;
-  
-  void (*on_scroll_down) (struct Widget *, void *);
-  void *scroll_down_data;
-  void (*on_scroll_up) (struct Widget *, void *);
-  void *scroll_up_data;
-  
   void (*on_tick) (struct Widget *, void *);
   void *tick_data;
+  
+  void (*on_event[9]) (struct Widget *, void *);
+  void *event_data[9];
 } Widget;
 
 Widget *Widget_plain_new ();
@@ -144,20 +140,20 @@ void Widget_add_child_weighed (Widget *parent, Widget *child,
 			       float layout_weight);
 
 void Widget_set_on_tick (Widget *widget, void (*on_tick) (Widget *, void *), void *userdata);
-void Widget_set_on_left_up (Widget *widget, void (*on_left_up) (Widget *, void *), void *userdata);
+void Widget_set_on_event (Widget *widget, WidgetEvent event, void (*on_event) (Widget *, void *), void *userdata);
 
-void Widget_label_set_text (Widget *widget, const char *text);
-void Widget_label_printf (Widget *widget, const char *format, ...);
-
-void Widget_scrollable_scroll (Widget *widget, vec2 direction);
-
-Widget *Widget_find_xy_matching (Widget *widget, vec2 pos, gboolean (*match_fn) (Widget *widget));
+Widget *Widget_find_xy_event (Widget *widget, vec2 pos, WidgetEvent event);
 Widget *Widget_find_xy (Widget *widget, vec2 point);
 
 void ui_widget_mesh_init ();
 void Widget_tick (Widget *widget);
 void Widget_render (Widget *widget, mat4 projection, int window_height);
 
+void Widget_label_set_text (Widget *widget, const char *text);
+void Widget_label_printf (Widget *widget, const char *format, ...);
+
+void Widget_scrollable_scroll (Widget *widget, vec2 direction);
+
 /* ---------------------------------------------- */
 typedef struct LabelFormatData
 {