bpo-33656: On Windows, add API call saying that tk scales for DPI (GH-7137)
On Windows 8.1+ or 10, with DPI compatibility properties of the Python binary
unchanged, and a monitor resolution greater than 96 DPI, this should
make text and lines sharper. It should otherwise have no effect.
Using a magnifier, I determined that the improvement comes from horizontal and
lines being better lined up with the monitor pixels. I checked that this call causes
no problem on any Windows buildbot, including the Win7 buildbots. Unlike most
IDLE patches, this one can be easily reverted by users by removing a few lines,
at the top of idlelib/pyshell.py.
(cherry picked from commit 800415e3df69f494afe9f95a8563ce17609fe1da)
Co-authored-by: Terry Jan Reedy <tjreedy@udel.edu>
diff --git a/Lib/idlelib/NEWS.txt b/Lib/idlelib/NEWS.txt
index 2f725b8..b10a4ba 100644
--- a/Lib/idlelib/NEWS.txt
+++ b/Lib/idlelib/NEWS.txt
@@ -3,6 +3,14 @@
======================================
+bpo-33656: On Windows, add API call saying that tk scales for DPI.
+On Windows 8.1+ or 10, with DPI compatibility properties of the Python
+binary unchanged, and a monitor resolution greater than 96 DPI, this
+should make text and lines sharper. It should otherwise have no
+effect. If perchance it make text worse on your monitor, you can
+disable the ctypes.OleDLL call near the top of pyshell.py and report
+the problem on python-list or idle-dev@python.org.
+
bpo-33768: Clicking on a context line moves that line to the top
of the editor window.