[Python-checkins] [2.7] bpo-34275: Make IDLE calltips always visible on Mac. (GH-8639) (GH-8644)

[Terry Jan Reedy]

https://github.com/python/cpython/commit/24a54da9452efb21d30dc56c6b9d0977d08ae452
commit: 24a54da9452efb21d30dc56c6b9d0977d08ae452
branch: 2.7
author: Terry Jan Reedy <tjreedy at udel.edu>
committer: GitHub <noreply at github.com>
date: 2018-08-02T23:40:20-04:00
summary:

 [2.7] bpo-34275: Make IDLE calltips always visible on Mac. (GH-8639) (GH-8644)

Some MacOS-tk combinations need .update_idletasks().
The call is both unneeded and innocuous on Linux and Windows.
Patch by Kevin Walzer.

(cherry picked from commit 9beaef6225cdae972b1cccd5310828cc29bf9d33)
Co-authored-by: Terry Jan Reedy <tjreedy at udel.edu>

files:
A Misc/NEWS.d/next/IDLE/2018-08-02-22-16-42.bpo-34275.Iu0d7t.rst
M Lib/idlelib/CallTipWindow.py

diff --git a/Lib/idlelib/CallTipWindow.py b/Lib/idlelib/CallTipWindow.py
index e63164b5a00a..2a453d06f5b9 100644
--- a/Lib/idlelib/CallTipWindow.py
+++ b/Lib/idlelib/CallTipWindow.py
@@ -72,6 +72,7 @@ def showtip(self, text, parenleft, parenright):
                            background="#ffffe0", relief=SOLID, borderwidth=1,
                            font = self.widget['font'])
         self.label.pack()
+        tw.update_idletasks()
         tw.lift()  # work around bug in Tk 8.5.18+ (issue #24570)
 
         self.checkhideid = self.widget.bind(CHECKHIDE_VIRTUAL_EVENT_NAME,
diff --git a/Misc/NEWS.d/next/IDLE/2018-08-02-22-16-42.bpo-34275.Iu0d7t.rst b/Misc/NEWS.d/next/IDLE/2018-08-02-22-16-42.bpo-34275.Iu0d7t.rst
new file mode 100644
index 000000000000..d7eba7ad3cf4
--- /dev/null
+++ b/Misc/NEWS.d/next/IDLE/2018-08-02-22-16-42.bpo-34275.Iu0d7t.rst
@@ -0,0 +1,2 @@
+Make IDLE calltips always visible on Mac. Some MacOS-tk combinations need
+.update_idletasks(). Patch by Kevin Walzer.