Issue #989712: Support using Tk without a mainloop.
diff --git a/Lib/idlelib/run.py b/Lib/idlelib/run.py
index 25338ff..962c6c0 100644
--- a/Lib/idlelib/run.py
+++ b/Lib/idlelib/run.py
@@ -38,6 +38,21 @@
return s
warnings.formatwarning = idle_formatwarning_subproc
+
+def handle_tk_events():
+ """Process any tk events that are ready to be dispatched if tkinter
+ has been imported, a tcl interpreter has been created and tk has been
+ loaded."""
+ tkinter = sys.modules.get('tkinter')
+ if tkinter and tkinter._default_root:
+ # tkinter has been imported, an Tcl interpreter was created and
+ # tk has been loaded.
+ root = tkinter._default_root
+ while root.tk.dooneevent(tkinter._tkinter.DONT_WAIT):
+ # Process pending events.
+ pass
+
+
# Thread shared globals: Establish a queue between a subthread (which handles
# the socket) and the main thread (which runs user code), plus global
# completion, exit and interruptable (the main thread) flags:
@@ -93,6 +108,7 @@
try:
seq, request = rpc.request_queue.get(block=True, timeout=0.05)
except queue.Empty:
+ handle_tk_events()
continue
method, args, kwargs = request
ret = method(*args, **kwargs)