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.

1 files changed, 4 insertions, 3 deletions

diff --git a/Lib/idlelib/configdialog.py b/Lib/idlelib/configdialog.py
index 7df69d5..75b917d 100644
--- a/Lib/idlelib/configdialog.py
+++ b/Lib/idlelib/configdialog.py
@@ -373,11 +373,12 @@ class ConfigDialog(Toplevel):
                             ).grid(row=row, column=1, sticky=W, padx=7)
             elif opt['type'] == 'int':
                 Entry(entry_area, textvariable=var, validate='key',
-                      validatecommand=(self.is_int, '%P')
+                      validatecommand=(self.is_int, '%P'), width=10
                       ).grid(row=row, column=1, sticky=NSEW, padx=7)
 
-            else:
-                Entry(entry_area, textvariable=var
+            else:  # type == 'str'
+                # Limit size to fit non-expanding space with larger font.
+                Entry(entry_area, textvariable=var, width=15
                       ).grid(row=row, column=1, sticky=NSEW, padx=7)
         return