[issue26698] Tk DPI awareness

[Terry J. Reedy]

Terry J. Reedy  added the comment:

The fix for IDLE on Windows made it into 3.6.6rc1 and 3.7.0rc1.

Changing the python.exe and pythonw.exe default dpi settings is a possible 
issue for 3.8, and should have Steve.Dower nosy.

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resolution:  -> duplicate
stage:  -> resolved
status: open -> closed
superseder:  -> IDLE: Turn on DPI awareness on Windows

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[issue26698] Tk DPI awareness

[Terry J. Reedy]

Terry J. Reedy  added the comment:

Elisha Paine, who prompted #33656 by posting the SetProcessDpiAwareness(1) fix 
to the idledev list, wrote to me that pyglet and probably pygame have similar 
issues.

I wonder if Python should be installed with the 'application' setting, or if 
DPI adjustment should be discussed in the Windows section of the Using manual. 
https://docs.python.org/3/using/windows.html

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[issue26698] Tk DPI awareness

[Eric Fahlgren]

Eric Fahlgren  added the comment:

I used the default Application setting.

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[issue26698] Tk DPI awareness

[Terry J. Reedy]

Terry J. Reedy  added the comment:

Do any of the Windows experts know what "Override high DPI scaling behavior" on 
properties does?  Does it call SetProcessDpiAwareness?  It seems so. The answer 
would have implications for #33656 (which is about fixing this issue in IDLE, 
as Westly originally requested here).

This setting is on the popup when one clicks [Change high DPI settings] on the 
Compatibility tab.  Eric, there is a dropdown with 3 possible overrides.  
Application (default), System, System [Enhanced].  Which one did you use?

In my experiments, 'Application has the same effect as 
SetProcessDpiAwareness(1), while 'System' is the same as 
SetProcessDpiAwareness(0).  I expected this from what I posted on #33656.

Since the properties settings may or not be correct for all graphics packages, 
but will likely be correct for all tk and tkinter apps, I think tkinter should 
perhaps be modified.  The question is whether SetProcessDpiAwareness(1) is 
correct (for tk and tkinter) for all monitors.  I suspect so but don't know for 
sure.

--
components: +Windows
nosy: +eryksun, paul.moore, steve.dower, tim.golden, zach.ware

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[issue26698] Tk DPI awareness

[Eric Fahlgren]

Eric Fahlgren  added the comment:

Still blurry with 3.6.5 on Win 10 with a 2560x1600 monitor at 125% scaling (I 
compared it to 2.7.15, they looked identical).  If I go to the Windows 
properties for pythonw.exe and turn on "Override high DPI scaling behavior" 
it's nice and sharp.

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nosy: +eric.fahlgren

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[issue26698] Tk DPI awareness

[Terry J. Reedy]

Terry J. Reedy  added the comment:

Westly, #31500 changed font scaling for IDLE on high DPI screens.  It also 
removed some hard-coding of frame sizes in terms of pixels.  Does anything look 
better for you with current IDLE (3.6.5, 3.7.0)?

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[issue26698] Tk DPI awareness

[Westley Martínez]

Westley Martínez added the comment:

IDLE 3.5.1 on Windows 10

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[issue26698] Tk DPI awareness

[Terry J. Reedy]

Terry J. Reedy added the comment:

This is not an IDLE issue, and probably not a tkinter issue.  The display of 
characters on a screen is done by the OS font software under direction of 
tcl/tk.

What OS are you running and what version of Tk (see IDLE -> Help -> About IDLE)?

--
components:  -IDLE, Library (Lib)
nosy: +wordtech -kbk, roger.serwy
title: IDLE DPI Awareness -> Tk DPI awareness

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