Tooltip improvements and bug fixes

* Disabled tooltips on android devices
* Improved screen boundary detection to avoid overflow
* Improved readability and padding
* Fixed the existence of tooltip parameter causing massive lag spikes on hover/unhover events (even when tooltips were disabled) by patching the related engine focus function

game/scripts/interface/tooltip.rpy

@@ -1,20 +1,20 @@
+default _tooltip = None
+
 screen tooltip():
     layer "interface"
     tag tooltip
     zorder 5
     style_prefix "tooltip"
 
-    $ tooltip = GetTooltip()
+    if settings.get("tooltip") and _tooltip:
-
-    if settings.get("tooltip") and tooltip:
         window:
-            id tooltip
+            id "tooltip"
             at tooltip_follow
-            text "[tooltip]"
+            text "[_tooltip]"
 
 style tooltip_window is empty:
     background "#00000080"
-    padding (12, 6)
+    padding (18, 12)
     xmaximum 300
 
 style tooltip_text is default:
@@ -30,12 +30,22 @@ init python:
 
     def tooltip_func(trans, st, at):
         x, y = renpy.get_mouse_pos()
-        xanchor = 1.0 if (x > 980) else 0.0
+
-        yanchor = 1.0 if (y > 500) else 0.0
+        if trans.pos is not (x, y):
-        xoffset = 11 if xanchor else 0
+            cw, ch = trans.child.window_size
-        yoffset = 14 if yanchor else 0
+
+            xanchor = 1.0 if (x + int(cw)) > (config.screen_width) else 0.0
+            yanchor = 1.0 if (y + int(ch)) > (config.screen_height) else 0.0
+
+            xoffset = 18 if xanchor else 0
+            yoffset = 24 if yanchor else 0
             trans.pos = (x, y)
             trans.anchor = (xanchor, yanchor)
             trans.offset = (xoffset, yoffset)
 
             return 0
+
+    if not renpy.android:
+
+        config.always_shown_screens.append("tooltip")
+        config.per_frame_screens.append("tooltip")

game/scripts/script.rpy

@@ -1,21 +1,14 @@
 
-# The game starts here
 label start:
-    if not renpy.android:
-        show screen tooltip
-
     python:
         version = version_float()
-
         renpy.block_rollback()
 
     jump start_wt
 
 label start_quick:
-    if not renpy.android:
-        show screen tooltip
-
     python:
+        version = version_float()
         game.difficulty = 2
         ton_friendship = 5
         sna_friendship = 5
@@ -27,10 +20,8 @@ label start_quick:
     jump skip_to_hermione
 
 label start_dev:
-    if not renpy.android:
-        show screen tooltip
-
     python:
+        version = version_float()
         game.difficulty = 2
         game.cheats = True
         game.gold = 100000

game/scripts/utility/engine.rpy

@@ -86,3 +86,40 @@ python early hide:
         return rv
 
     renpy.list_files = _list_files
+
+    # Default focus behaviour restarts the interaction whenever
+    # any element that contains a tooltip is being hovered or unhovered.
+    # Restarting interactions in a short timespan causes massive lag spikes,
+    # in order to fix it, we'll refresh just the tooltip screen and skip the rest.
+
+    def set_focused(widget, arg, screen):
+        global _tooltip
+        renpy.display.focus.argument = arg
+        renpy.display.focus.screen_of_focused = screen
+
+        if screen is not None:
+            renpy.display.focus.screen_of_focused_names = { screen.screen_name[0], screen.tag }
+        else:
+            renpy.display.focus.screen_of_focused_names = set()
+
+        renpy.game.context().scene_lists.focused = widget
+        renpy.display.tts.displayable(widget)
+
+        # Figure out the tooltip.
+
+        _tooltip = widget._get_tooltip() if widget else None
+
+        # setattr(renpy.store, "widget", widget) # DEBUG
+
+        # if renpy.display.focus.tooltip != new_tooltip:
+        #     renpy.display.focus.tooltip = new_tooltip
+        #     renpy.display.focus.capture_focus("tooltip")
+
+        #     renpy.exports.restart_interaction()
+
+        #     if renpy.display.focus.tooltip is not None:
+        #         renpy.display.focus.last_tooltip = renpy.display.focus.tooltip
+        #         renpy.display.focus.screen_of_last_focused_names = renpy.display.focus.screen_of_focused_names
+
+    renpy.display.focus.set_focused = set_focused
+