commit b26c4f1a14ae45daad956c64f42fb6dd47ff8886
Author: Bùi Thành Nhân <hi@imnhan.com>
Date:   Mon Nov 30 19:08:21 2020 +0700

    bring back Windows support
    
    Necessary evil I guess.

diff --git a/README.md b/README.md
index acc59a5..b2d4599 100644
--- a/README.md
+++ b/README.md
@@ -1,7 +1,7 @@
 McRoss is a minimal and usable [gemini://](https://gemini.circumlunar.space/)
-browser written in python and tkinter. I use it on Linux but it should work on
-other Unix-likes without trouble. Windows isn't supported until I can find an
-alternative to tkinter's [createfilehandler()][7].
+browser written in python and tkinter, meaning it Just Works (tm) on any
+self-respecting desktop OS. I use and test it on Linux & Windows, but it should
+also run fine on macOS or any of the BSDs.
 
 It currently looks like this:
 
@@ -168,9 +168,9 @@ # License
 
 # Forks
 
-McRoss development is... conservative and slow. If that bothers you, check out
-[picross][6] which is a nice fork with more features (TOFU, tabs, among other
-things).
+McRoss development is... conservative and sporadic.
+If that bothers you, check out [picross][6] which is a nice fork with more
+features (TOFU, tabs, among other things).
 
 [1]: https://hi.imnhan.com/posts/introducing-mcross-a-minimal-gemini-browser/
 [2]: https://todo.sr.ht/~nhanb/mcross/3
diff --git a/pyproject.toml b/pyproject.toml
index e03a1f2..7a48c30 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,6 +1,6 @@
 [tool.poetry]
 name = "mcross"
-version = "0.5.18"
+version = "0.5.19"
 description = "Do you remember www?"
 authors = ["nhanb <hi@imnhan.com>"]
 license = "AGPL-3.0-only"
diff --git a/src/mcross/gui/controller.py b/src/mcross/gui/controller.py
index 6397404..9e80fc7 100644
--- a/src/mcross/gui/controller.py
+++ b/src/mcross/gui/controller.py
@@ -7,13 +7,9 @@
 
 import curio
 
-from ..transport import (
-    MAX_REQUEST_SECONDS,
-    GeminiUrl,
-    NonAbsoluteUrlWithoutContextError,
-    UnsupportedProtocolError,
-    get,
-)
+from ..transport import (MAX_REQUEST_SECONDS, GeminiUrl,
+                         NonAbsoluteUrlWithoutContextError,
+                         UnsupportedProtocolError, get)
 from .model import Model
 from .view import WAITING_CURSOR, View
 
@@ -32,9 +28,6 @@ def __init__(self):
         self.gui_ops = curio.UniversalQueue(withfd=True)
         self.coro_ops = curio.UniversalQueue()
 
-        # Set up event handler for queued GUI updates
-        self.root.createfilehandler(self.gui_ops, READABLE, self.process_gui_ops)
-
         # When in the middle of an action, this flag is set to False to prevent user
         # from clicking other random stuff:
         self.allow_user_interaction = True
@@ -46,6 +39,20 @@ def inner(*args):
 
             return inner
 
+        # Make sure queued GUI operations are executed as soon as they become available
+        if hasattr(self.root, "createfilehandler"):
+            self.root.createfilehandler(self.gui_ops, READABLE, self.process_gui_ops)
+        else:
+            print("Running poll-based workaround for Windows.")
+            # This is way more inefficient (5% CPU usage on a Surface Go at idle) but
+            # hey it's better than not working at all!
+
+            def after_cb():
+                self.process_gui_ops()
+                self.root.after(10, after_cb)
+
+            self.root.after(10, after_cb)
+
         self.view.go_callback = put_coro_op(self.go_callback)
         self.view.link_click_callback = put_coro_op(self.link_click_callback)
         self.view.back_callback = put_coro_op(self.back_callback)
@@ -63,7 +70,7 @@ def run(self):
     async def put_gui_op(self, func, *args, **kwargs):
         await self.gui_ops.put((func, args, kwargs))
 
-    def process_gui_ops(self, file, mask):
+    def process_gui_ops(self, *args):
         while not self.gui_ops.empty():
             func, args, kwargs = self.gui_ops.get()
             func(*args, **kwargs)
@@ -126,7 +133,8 @@ async def visit_link(self, url: GeminiUrl):
 
         except curio.errors.TaskTimeout:
             await self.put_gui_op(
-                statusbar_logger.info, f"Request timed out: {MAX_REQUEST_SECONDS}s",
+                statusbar_logger.info,
+                f"Request timed out: {MAX_REQUEST_SECONDS}s",
             )
             await self.put_gui_op(
                 messagebox.showwarning,
diff --git a/src/mcross/gui/view.py b/src/mcross/gui/view.py
index 1a8ae95..116c605 100644
--- a/src/mcross/gui/view.py
+++ b/src/mcross/gui/view.py
@@ -11,7 +11,7 @@
 # OS-specific values
 if sys.platform == "win32":
     TTK_THEME = "vista"
-    POINTER_CURSOR = "center_ptr"
+    POINTER_CURSOR = "hand2"
     WAITING_CURSOR = "wait"
 elif sys.platform == "darwin":
     TTK_THEME = "aqua"