diff --git a/game/res/ui/debug_window.scm b/game/res/scripts/ui/debug_window.scm
similarity index 97%
rename from game/res/ui/debug_window.scm
rename to game/res/scripts/ui/debug_window.scm
index fa5c39e..cf1a767 100644
--- a/game/res/ui/debug_window.scm
+++ b/game/res/scripts/ui/debug_window.scm
@@ -74,5 +74,5 @@
   #:layout-padding 8
   #:layout-spacing 8
   #:horizontal #t
-  (widget-checkbox "Flight" "flight_enabled" #:layout-weight 0.5 #:h 20)
-  (widget-checkbox "Wireframe" "wireframe_enabled" #:layout-weight 0.5 #:h 20)))
+  (widget-checkbox "Flight" "flight_enabled" #:layout-weight 0.5 #:h 20 #:tooltip "Testt")
+  (widget-checkbox "Wireframe" "wireframe_enabled" #:layout-weight 0.5 #:h 20 #:tooltip "test222")))
diff --git a/game/res/scripts/ui/tooltip.scm b/game/res/scripts/ui/tooltip.scm
new file mode 100644
index 0000000..6bfbf37
--- /dev/null
+++ b/game/res/scripts/ui/tooltip.scm
@@ -0,0 +1,22 @@
+(define COLOR_WHITE '(1.0 1.0 1.0 1.0))
+(define COLOR_BLACK '(0.0 0.0 0.0 1.0))
+
+(define style-tooltip
+  (style-new
+   #:background-color COLOR_BLACK))
+
+(define style-tooltip-text
+  (style-new
+   #:text-color COLOR_WHITE
+   #:text-color-hovered COLOR_WHITE
+   #:text-color-clicked COLOR_WHITE))
+
+(widget-new
+ 'flowbox
+ #:style style-tooltip
+ #:w 200
+ #:visible #f
+ #:horizontal #t
+ #:layout-padding 4
+ #:layout-spacing 8
+ (widget-new 'multiline #:line-height 20 #:layout-weight 1 #:style style-tooltip-text))
diff --git a/game/src/ui/uiman.c b/game/src/ui/uiman.c
index e6c6dd7..65b98f6 100644
--- a/game/src/ui/uiman.c
+++ b/game/src/ui/uiman.c
@@ -12,8 +12,8 @@ static Widget *hovered_widget = NULL;
 static Widget *clicked_widget = NULL;
 static Widget *focused_widget = NULL;
 
-/* static Widget *tooltip_widget = NULL; */
-/* static Widget *tooltip_text = NULL; */
+static Widget *tooltip_widget = NULL;
+static Widget *tooltip_text = NULL;
 
 void
 uiman_init ()
@@ -24,10 +24,13 @@ uiman_init ()
   ui_root = Widget_new ();
   IVEC2_SETI (ui_root->size, sdl_window_w, sdl_window_h);
 
-  SCM scm_debug = scm_c_primitive_load ("res/ui/debug_window.scm");
+  SCM scm_debug = scm_c_primitive_load ("res/scripts/ui/debug_window.scm");
   Widget *debug_window = (Widget *) scm_to_pointer (scm_debug);
   Widget_add_child (ui_root, debug_window);
-  Widget_dump (ui_root, 0);
+
+  SCM scm_tooltip = scm_c_primitive_load ("res/scripts/ui/tooltip.scm");
+  tooltip_widget = (Widget *) scm_to_pointer (scm_tooltip);
+  tooltip_text = g_array_index (tooltip_widget->children, Widget *, 0);
 }
 
 void
@@ -40,7 +43,7 @@ void
 uiman_render ()
 {
   Widget_render (ui_root, projection, sdl_window_h);
-  /* Widget_render (tooltip_widget, projection, sdl_window_h); */
+  Widget_render (tooltip_widget, projection, sdl_window_h);
 }
 
 void
@@ -95,7 +98,8 @@ uiman_cb_switch_focus (SDL_Event *event, void *data)
   flags_switch ("ui_has_focus");
   SDL_SetWindowRelativeMouseMode (sdl_window, !flags_get ("ui_has_focus"));
 
-  /* We reset the global states of the UI. */
+  /* We reset the global states of the UI. TODO: also launch the
+     callbacks on mouse leave? */
   SDL_StopTextInput (sdl_window);
   _uiman_set_hovered (hovered_widget, FALSE);
   hovered_widget = NULL;
@@ -104,7 +108,7 @@ uiman_cb_switch_focus (SDL_Event *event, void *data)
   _uiman_set_clicked (clicked_widget, FALSE);
   clicked_widget = NULL;
   
-  /* tooltip_widget->visible = FALSE; */
+  tooltip_widget->visible = FALSE;
   
   return TRUE;
 }
@@ -171,13 +175,13 @@ uiman_cb_mouse_motion (SDL_Event *event, void *data)
 
   if (tooltip_source && tooltip_source->tooltip && tooltip_source->tooltip->len > 0)
     {
-      /* Widget_multiline_text_set_text (tooltip_text, tooltip_source->tooltip->str); */
-      /* tooltip_widget->visible = TRUE; */
-      /* IVEC2_SETI (tooltip_widget->position, pos[0] + 12, pos[1] + 12); */
+      g_string_overwrite (tooltip_text->multiline_text.text, 0, tooltip_source->tooltip->str);
+      tooltip_widget->visible = TRUE;
+      IVEC2_SETI (tooltip_widget->position, pos[0] + 12, pos[1] + 12);
     }
   else
     {
-      /* tooltip_widget->visible = FALSE; */
+      tooltip_widget->visible = FALSE;
     }
   
   /* This callback always eats the event, because why would the game
diff --git a/game/src/ui/widget_ops.c b/game/src/ui/widget_boilerplate.c
similarity index 52%
rename from game/src/ui/widget_ops.c
rename to game/src/ui/widget_boilerplate.c
index 1144f7c..9b125e2 100644
--- a/game/src/ui/widget_ops.c
+++ b/game/src/ui/widget_boilerplate.c
@@ -1,97 +1,105 @@
-#include "widget_ops.h"
+#include "widget_boilerplate.h"
 
 extern SDL_Window *sdl_window;
 
-WidgetOpData *
-WidgetOpData_new (WidgetOp op, void *ptr, ...)
+/* Entry boilerplate */
+void
+ui_boilerplate_entry_move_left (Widget *self, SDL_Event *sdl_event, void *userdata)
 {
-  WidgetOpData *data = g_new0 (WidgetOpData, 1);
-  data->op = op;
-  data->ptr = ptr;
-
-  va_list ap;
-  va_start (ap, ptr);
-
-  switch (data->op)
-    {
-    case OP_SCROLLABLE_SCROLL:
-      glm_ivec2_copy (va_arg (ap, int *), data->scroll_dir);
-      break;
-    default:
-      break;
-    }
+  UNUSED (sdl_event, userdata);
   
-  va_end (ap);
-  return data;
+  if (self->entry.cursor_position > 0)
+    {
+      self->entry.cursor_position--;
+    }
 }
 
 void
-uicb_widget_op (Widget *self, SDL_Event *sdl_event, void *userdata)
+ui_boilerplate_entry_move_right (Widget *self, SDL_Event *sdl_event, void *userdata)
 {
-  UNUSED (sdl_event);
-  WidgetOpData *data = userdata;
-
-  switch (data->op)
+  UNUSED (sdl_event, userdata);
+  
+  if (self->entry.cursor_position < g_utf8_strlen (self->entry.content->str, -1))
     {
-    case OP_SCROLLABLE_SCROLL:
-      Widget_scrollable_scroll ((Widget *) data->ptr, data->scroll_dir);
-      break;
-    case OP_START_TEXT_INPUT:
-      SDL_StartTextInput (sdl_window);
-      break;
-    case OP_STOP_TEXT_INPUT:
-      SDL_StopTextInput (sdl_window);
-      break;
-    case OP_ENTRY_INPUT_TEXT:
-      Widget_entry_input_text (self, sdl_event->text.text);
-      break;
-    case OP_ENTRY_DELETE_BACKWARD:
-      if (self->entry.cursor_position > 0
-	  && self->entry.content->len > 0)
-	{
-	  gchar *start = g_utf8_offset_to_pointer (self->entry.content->str, self->entry.cursor_position - 1);
-	  gchar *end = g_utf8_next_char (start);
-	  gint byte_offset = start - self->entry.content->str;
-	  gint byte_len = end - start;
-	  
-	  g_string_erase (self->entry.content, byte_offset, byte_len);
-	  self->entry.cursor_position--;
-	}
-      break;
-    case OP_ENTRY_DELETE_FORWARD:
-      int total_chars = g_utf8_strlen (self->entry.content->str, -1);
-
-      if (self->entry.cursor_position < total_chars)
-	{
-	  gchar *start = g_utf8_offset_to_pointer (self->entry.content->str, self->entry.cursor_position);
-	  gchar *end = g_utf8_next_char (start);
-	  gint byte_offset = start - self->entry.content->str;
-	  gint byte_len = end - start;
-	  
-	  g_string_erase (self->entry.content, byte_offset, byte_len);
-	}
-      break;
-    case OP_ENTRY_MOVE_LEFT:
-      if (self->entry.cursor_position > 0)
-	{
-	  self->entry.cursor_position--;
-	}
-      break;
-    case OP_ENTRY_MOVE_RIGHT:
-      if (self->entry.cursor_position < g_utf8_strlen (self->entry.content->str, -1))
-	{
-	  self->entry.cursor_position++;
-	}
-      break;
-    default:
-      break;
+      self->entry.cursor_position++;
     }
 }
 
+void
+ui_boilerplate_entry_delete_backward (Widget *self, SDL_Event *sdl_event, void *userdata)
+{
+  UNUSED (sdl_event, userdata);
+  
+  if (self->entry.cursor_position > 0
+      && self->entry.content->len > 0)
+    {
+      gchar *start = g_utf8_offset_to_pointer (self->entry.content->str, self->entry.cursor_position - 1);
+      gchar *end = g_utf8_next_char (start);
+      gint byte_offset = start - self->entry.content->str;
+      gint byte_len = end - start;
+      
+      g_string_erase (self->entry.content, byte_offset, byte_len);
+      self->entry.cursor_position--;
+    }
+}
+
+void
+ui_boilerplate_entry_delete_forward (Widget *self, SDL_Event *sdl_event, void *userdata)
+{
+  UNUSED (sdl_event, userdata);
+  
+  int total_chars = g_utf8_strlen (self->entry.content->str, -1);
+  
+  if (self->entry.cursor_position < total_chars)
+    {
+      gchar *start = g_utf8_offset_to_pointer (self->entry.content->str, self->entry.cursor_position);
+      gchar *end = g_utf8_next_char (start);
+      gint byte_offset = start - self->entry.content->str;
+      gint byte_len = end - start;
+      
+      g_string_erase (self->entry.content, byte_offset, byte_len);
+    }
+}
+
+void
+ui_boilerplate_entry_input_text (Widget *self, SDL_Event *sdl_event, void *userdata)
+{
+  UNUSED (userdata);
+  Widget_entry_input_text (self, sdl_event->text.text);
+}
+
+void
+ui_boilerplate_entry_start_input (Widget *self, SDL_Event *sdl_event, void *userdata)
+{
+  UNUSED (self, sdl_event, userdata);
+  SDL_StartTextInput (sdl_window); 
+}
+
+void
+ui_boilerplate_entry_stop_input (Widget *self, SDL_Event *sdl_event, void *userdata)
+{
+  UNUSED (self, sdl_event, userdata);
+  SDL_StopTextInput (sdl_window); 
+}
+
 /* Scrollbar boilerplate. */
 
 void
-uicb_scrollbar_start_scroll (Widget *self, SDL_Event *sdl_event, void *userdata)
+ui_boilerplate_scrollbar_scroll_up (Widget *self, SDL_Event *sdl_event, void *userdata)
+{
+  UNUSED (sdl_event, userdata);
+  Widget_scrollable_scroll (self->scrollbar.target, SCROLL_UP);
+}
+
+void
+ui_boilerplate_scrollbar_scroll_down (Widget *self, SDL_Event *sdl_event, void *userdata)
+{
+  UNUSED (sdl_event, userdata);
+  Widget_scrollable_scroll (self->scrollbar.target, SCROLL_DOWN);
+}
+
+void
+ui_boilerplate_scrollbar_start_scroll (Widget *self, SDL_Event *sdl_event, void *userdata)
 {
   UNUSED (userdata);
 
@@ -123,7 +131,7 @@ uicb_scrollbar_start_scroll (Widget *self, SDL_Event *sdl_event, void *userdata)
 }
 
 void
-uicb_scrollbar_scroll (Widget *self, SDL_Event *sdl_event, void *userdata)
+ui_boilerplate_scrollbar_scroll (Widget *self, SDL_Event *sdl_event, void *userdata)
 {
   UNUSED (userdata);
 
@@ -154,7 +162,7 @@ uicb_scrollbar_scroll (Widget *self, SDL_Event *sdl_event, void *userdata)
 }
 
 void
-uicb_scrollbar_stop_scroll (Widget *self, SDL_Event *sdl_event, void *userdata)
+ui_boilerplate_scrollbar_stop_scroll (Widget *self, SDL_Event *sdl_event, void *userdata)
 {
   UNUSED (sdl_event, userdata);
   self->scrollbar.dragging = FALSE;
@@ -174,7 +182,7 @@ ui_window_is_in_resize_area (Widget *self, vec2 mouse_pos)
 }
 
 void
-uicb_window_start_drag (Widget *self, SDL_Event *sdl_event, void *userdata)
+ui_boilerplate_window_start_drag (Widget *self, SDL_Event *sdl_event, void *userdata)
 {
   UNUSED (userdata);
 
@@ -195,21 +203,21 @@ uicb_window_start_drag (Widget *self, SDL_Event *sdl_event, void *userdata)
 }
 
 void
-_uicb_window_move (Widget *self, ivec2 mouse_pos)
+_ui_boilerplate_window_move (Widget *self, ivec2 mouse_pos)
 {
   self->position[0] = mouse_pos[0] - self->window.drag_offset[0];
   self->position[1] = mouse_pos[1] - self->window.drag_offset[1];
 }
 
 void
-_uicb_window_resize (Widget *self, ivec2 mouse_pos)
+_ui_boilerplate_window_resize (Widget *self, ivec2 mouse_pos)
 {
   self->size[0] = mouse_pos[0] - self->position[0];
   self->size[1] = mouse_pos[1] - self->position[1];
 }
 
 void
-uicb_window_drag (Widget *self, SDL_Event *sdl_event, void *userdata)
+ui_boilerplate_window_drag (Widget *self, SDL_Event *sdl_event, void *userdata)
 {
   UNUSED (userdata);
 
@@ -217,18 +225,18 @@ uicb_window_drag (Widget *self, SDL_Event *sdl_event, void *userdata)
   
   if (self->window.moving)
     {
-      _uicb_window_move (self, mouse_pos);
+      _ui_boilerplate_window_move (self, mouse_pos);
       self->layout_dirty = TRUE;
     }
   else if (self->window.resizing)
     {
-      _uicb_window_resize (self, mouse_pos);
+      _ui_boilerplate_window_resize (self, mouse_pos);
       self->layout_dirty = TRUE;
     }
 }
 
 void
-uicb_window_stop_drag (Widget *self, SDL_Event *sdl_event, void *userdata)
+ui_boilerplate_window_stop_drag (Widget *self, SDL_Event *sdl_event, void *userdata)
 {
   UNUSED (sdl_event, userdata);
   self->window.moving = FALSE;
diff --git a/game/src/ui/widget_boilerplate.h b/game/src/ui/widget_boilerplate.h
new file mode 100644
index 0000000..c9c1b92
--- /dev/null
+++ b/game/src/ui/widget_boilerplate.h
@@ -0,0 +1,20 @@
+#pragma once
+
+#include <SDL3/SDL.h>
+
+#include "widget_fw.h"
+#include "widget_core.h"
+
+void ui_boilerplate_entry_start_input (Widget *self, SDL_Event *sdl_event, void *userdata);
+void ui_boilerplate_entry_stop_input (Widget *self, SDL_Event *sdl_event, void *userdata);
+
+void ui_boilerplate_scrollbar_scroll_up (Widget *self, SDL_Event *sdl_event, void *userdata);
+void ui_boilerplate_scrollbar_scroll_down (Widget *self, SDL_Event *sdl_event, void *userdata);
+
+void ui_boilerplate_scrollbar_start_scroll (Widget *self, SDL_Event *sdl_event, void *userdata);
+void ui_boilerplate_scrollbar_scroll (Widget *self, SDL_Event *sdl_event, void *userdata);
+void ui_boilerplate_scrollbar_stop_scroll (Widget *self, SDL_Event *sdl_event, void *userdata);
+
+void ui_boilerplate_window_start_drag (Widget *self, SDL_Event *sdl_event, void *userdata);
+void ui_boilerplate_window_drag (Widget *self, SDL_Event *sdl_event, void *userdata);
+void ui_boilerplate_window_stop_drag (Widget *self, SDL_Event *sdl_event, void *userdata);
diff --git a/game/src/ui/widget_core.c b/game/src/ui/widget_core.c
index 297a113..5a2d261 100644
--- a/game/src/ui/widget_core.c
+++ b/game/src/ui/widget_core.c
@@ -5,6 +5,7 @@ Widget_new ()
 {
   Widget *w = g_new0 (Widget, 1);
   w->children = g_array_new (false, false, sizeof (Widget *));
+  w->tooltip = g_string_new (NULL);
   w->style = g_new0 (WidgetStyle, 1);
   w->visible = TRUE;
   w->do_render = Widget_render_base;
@@ -24,32 +25,6 @@ Widget_add_child (Widget *parent, Widget *child)
   g_array_append_val (parent->children, child);
 }
 
-void
-Widget_set_on_event (Widget *widget, WidgetEvent event,
-		     void (*on_event) (Widget *, SDL_Event *, void *),
-		     void *userdata)
-{
-  widget->on_event[event] = on_event;
-  widget->event_data[event] = userdata;
-}
-
-void
-Widget_set_on_key (Widget *widget, SDL_Scancode key,
-		   void (*on_key) (Widget *, SDL_Event *, void *), void *userdata)
-{
-  widget->on_key[key] = on_key;
-  widget->key_data[key] = userdata;
-}
-
-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_entry_input_text (Widget *widget, const char *text)
 {
@@ -92,27 +67,6 @@ Widget_hit_test (Widget *widget, ivec2 point)
 	  && y >= top && y <= bottom);
 }
 
-gboolean
-wcond_tooltip (Widget *widget, void *userdata)
-{
-  UNUSED (userdata);
-  return widget->tooltip != NULL;
-}
-
-gboolean
-wcond_event (Widget *widget, void *event)
-{
-  WidgetEvent e = GPOINTER_TO_INT (event);
-  return widget->on_event[e] != NULL;
-}
-
-gboolean
-wcond_any (Widget *widget, void *userdata)
-{
-  UNUSED (widget, userdata);
-  return TRUE;
-}
-
 Widget *
 Widget_find_xy_cond (Widget *widget, ivec2 pos, gboolean (*cond_func) (Widget *, void *), void *userdata)
 {
@@ -230,29 +184,3 @@ Widget_free (Widget *widget)
   g_free (widget);
 }
 
-void
-Widget_dump (Widget *widget, int depth)
-{
-  if (!widget) return;
-
-  GString *prefix = g_string_new (NULL);
-  for (int i = 0; i < depth; ++i)
-    {
-      g_string_append (prefix, " ");
-    }
-  
-  g_debug ("%sWidget %p kind=%d visible=%d", prefix->str, widget, widget->kind, widget->visible);
-
-  for (int i = 0; i < EVENT_COUNT; ++i)
-    {
-      if (widget->on_event[i])
-        {
-          g_debug ("%s  Has handler for event %d", prefix->str, i);
-        }
-    }
-
-  WFOREACH (widget, child)
-    {
-      Widget_dump (child, depth + 1);      
-    }
-}
diff --git a/game/src/ui/widget_core.h b/game/src/ui/widget_core.h
index 1377eef..ba7abd3 100644
--- a/game/src/ui/widget_core.h
+++ b/game/src/ui/widget_core.h
@@ -7,7 +7,7 @@
 #include "widget_render.h"
 #include "widget_layout.h"
 #include "widget_style.h"
-#include "widget_ops.h"
+#include "widget_boilerplate.h"
 
 #include "../util.h"
 #include "../resources.h"
@@ -19,8 +19,8 @@
   for (unsigned int _i = 0; _i < (widget)->children->len; ++_i)		\
     for (Widget *child = g_array_index ((widget)->children, Widget *, _i); child; child = NULL)
 
-#define SCROLL_UP (vec2) { 0.0, -1.0 }
-#define SCROLL_DOWN (vec2) { 0.0, 1.0 }
+#define SCROLL_UP (ivec2) { 0, -1 }
+#define SCROLL_DOWN (ivec2) { 0, 1 }
 
 typedef enum WidgetKind
   {
@@ -190,25 +190,17 @@ typedef struct Widget
 } Widget;
 
 Widget *Widget_new ();
-
 void Widget_add_child (Widget *parent, Widget *child);
 
-void Widget_set_on_event (Widget *widget, WidgetEvent event, void (*on_event) (Widget *, SDL_Event *, void *), void *userdata);
-void Widget_set_on_key (Widget *widget, SDL_Scancode key, void (*on_key) (Widget *, SDL_Event *, void *), void *userdata);
-
-void Widget_label_printf (Widget *widget, const char *format, ...);
-
 void Widget_entry_input_text (Widget *widget, const char *text);
-
 void Widget_scrollable_scroll (Widget *widget, ivec2 direction);
 
-gboolean wcond_tooltip (Widget *widget, void *userdata);
-gboolean wcond_event (Widget *widget, void *event);
-gboolean wcond_any (Widget *widget, void *userdata);
+static inline gboolean wcond_tooltip (Widget *widget, void *userdata) { UNUSED (userdata); return widget->tooltip != NULL; }
+static inline gboolean wcond_event (Widget *widget, void *event) { WidgetEvent e = GPOINTER_TO_INT (event); return widget->on_event[e] != NULL; }
+static inline gboolean wcond_any (Widget *widget, void *userdata) { UNUSED (widget, userdata); return TRUE; }
+
 Widget *Widget_find_xy_cond (Widget *widget, ivec2 point, gboolean (*cond_func) (Widget *, void *), void *userdata);
 
 void Widget_tick (Widget *widget);
 void Widget_render (Widget *widget, mat4 projection, int window_height);
 void Widget_free (Widget *widget);
-
-void Widget_dump (Widget *widget, int depth);
diff --git a/game/src/ui/widget_guile.c b/game/src/ui/widget_guile.c
index 6589107..f29f700 100644
--- a/game/src/ui/widget_guile.c
+++ b/game/src/ui/widget_guile.c
@@ -154,6 +154,11 @@ _wgg_build (const char *type)
     {
       w->kind = WIDGET_SCROLLBAR;
       w->do_render = Widget_render_scrollbar;
+      w->on_event[EVENT_LEFT_DOWN] = ui_boilerplate_scrollbar_start_scroll;
+      w->on_event[EVENT_MOUSE_MOVE] = ui_boilerplate_scrollbar_scroll;
+      w->on_event[EVENT_LEFT_UP] = ui_boilerplate_scrollbar_stop_scroll;
+      w->on_event[EVENT_SCROLL_UP] = ui_boilerplate_scrollbar_scroll_up;
+      w->on_event[EVENT_SCROLL_DOWN] = ui_boilerplate_scrollbar_scroll_down;
     }
 
   if (!g_strcmp0 (type, "progress"))
@@ -172,6 +177,7 @@ _wgg_build (const char *type)
     {
       w->kind = WIDGET_MULTILINE_TEXT;
       w->do_render = Widget_render_multiline_text;
+      w->do_layout = Widget_layout_multiline_text;
       w->multiline_text.text = g_string_new (NULL);
       w->multiline_text.lines = g_array_new (FALSE, FALSE, sizeof (GString));
     }
@@ -201,9 +207,9 @@ _wgg_build (const char *type)
       w->do_layout = Widget_layout_window;
       w->window.title = g_string_new ("Window");
       w->window.titlebar_height = 20;
-      w->on_event[EVENT_LEFT_DOWN] = uicb_window_start_drag;
-      w->on_event[EVENT_MOUSE_MOVE] = uicb_window_drag;
-      w->on_event[EVENT_LEFT_UP] = uicb_window_stop_drag;
+      w->on_event[EVENT_LEFT_DOWN] = ui_boilerplate_window_start_drag;
+      w->on_event[EVENT_MOUSE_MOVE] = ui_boilerplate_window_drag;
+      w->on_event[EVENT_LEFT_UP] = ui_boilerplate_window_stop_drag;
     }
   
   return w;
@@ -341,6 +347,11 @@ _wgg_set_property (Widget *w, const char *key, SCM val)
 	}
     }
 
+  if (!g_strcmp0 (key, "tooltip"))
+    {
+      g_string_overwrite (w->tooltip, 0, scm_to_utf8_string (val));
+    }
+
   if (!g_strcmp0 (key, "on-tick"))
     {
       if (!scm_is_true (scm_procedure_p (val)))
diff --git a/game/src/ui/widget_ops.h b/game/src/ui/widget_ops.h
deleted file mode 100644
index a03faa3..0000000
--- a/game/src/ui/widget_ops.h
+++ /dev/null
@@ -1,38 +0,0 @@
-#pragma once
-
-#include <SDL3/SDL.h>
-
-#include "widget_fw.h"
-#include "widget_core.h"
-
-typedef enum WidgetOp
-  {
-    OP_SCROLLABLE_SCROLL,
-    
-    OP_START_TEXT_INPUT,
-    OP_STOP_TEXT_INPUT,
-    OP_ENTRY_INPUT_TEXT,
-    OP_ENTRY_DELETE_BACKWARD,
-    OP_ENTRY_DELETE_FORWARD,
-    OP_ENTRY_MOVE_LEFT,
-    OP_ENTRY_MOVE_RIGHT
-  } WidgetOp;
-
-typedef struct WidgetOpData
-{
-  WidgetOp op;
-  void *ptr;
-
-  ivec2 scroll_dir;
-} WidgetOpData;
-
-WidgetOpData *WidgetOpData_new (WidgetOp op, void *ptr, ...);
-void uicb_widget_op (Widget *self, SDL_Event *sdl_event, void *userdata);
-
-void uicb_scrollbar_start_scroll (Widget *self, SDL_Event *sdl_event, void *userdata);
-void uicb_scrollbar_scroll (Widget *self, SDL_Event *sdl_event, void *userdata);
-void uicb_scrollbar_stop_scroll (Widget *self, SDL_Event *sdl_event, void *userdata);
-
-void uicb_window_start_drag (Widget *self, SDL_Event *sdl_event, void *userdata);
-void uicb_window_drag (Widget *self, SDL_Event *sdl_event, void *userdata);
-void uicb_window_stop_drag (Widget *self, SDL_Event *sdl_event, void *userdata);