microsoft / microsoft/calculator

Misaligned pixels when scaled at multiples of 25% or 50%, but not 100%

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Dominant language
C#
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Description

Describe the bug

At certain scaling values, there's misalignment between 8 and 9 on the digit grid.

Steps To Reproduce
Steps to reproduce the behavior:

  1. Set system scaling to any value other than a multiple of 100.
  2. Open calculator
  3. Observed misaligned pixels

Expected behavior

Grid should be properly aligned at all display scales.

Screenshots

Issue is demonstrated here: https://www.youtube.com/shorts/IHhpu_bfYZk

Testing on my own machine:
At 100% scaling:
image

At 125% scaling:
image

Device and Application Information

  • OS Build: 10.0.22631.0
  • Architecture: X64
  • Application Version: 11.2403.6.0
  • Region: en-US
  • Dev Version Installed: False

Additional context
A good place to start when fixing this is to investigate and confirm whether it's caused by the Multiples of Four design/layout rule being broken, which is a common cause for this in other apps.

Requested Assignment

I'm just reporting this problem.

Contributor guide

Open the contributing guide

First steps

  1. Read the whole issue, then the project's contributing guide.
  2. Comment on the issue to say you are picking it up — it saves two people doing the same work.
  3. Fork the repository and make your change on a branch.
  4. Open a pull request that references the issue number.

Research direction

Start by reproducing the issue in Calculator at 125% and other non-100% system scaling values, comparing the digit grid with 100% scaling. Investigate the Calculator display and layout rendering for the reported misalignment between 8 and 9, including whether the Multiples of Four rule is involved; done means the grid is aligned at all tested display scales.

Written by the indexing model from the issue text.

Assessment

Tech stack
csharp
Domain
desktop
Issue type
Bug
Difficulty
4/5
Estimated time
3-5 days
Activity status
Stale
Clarity
Mostly clear
Newbie friendliness
35/100

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