fix #12358 [HDPI] The "document" text in the “Generating Previews” dialog is truncated at >200% DPI

[Epica3055]

Fixes #12358

Proposed changes

• Make the indicator's width wider.

Regression?

• Yes

Risk

• low

Screenshots

Before

After

Test methodology

• manual

Microsoft Reviewers: Open in CodeFlow

[codecov[bot]]

Codecov Report

Attention: Patch coverage is 0% with 40 lines in your changes missing coverage. Please review.

Project coverage is 76.02611%. Comparing base (e8a65f9) to head (3e2afb2). Report is 185 commits behind head on main.

Additional details and impacted files

@@                 Coverage Diff                 @@
##                main      #12363         +/-   ##
===================================================
+ Coverage   75.64857%   76.02611%   +0.37753%     
===================================================
  Files           3120        3162         +42     
  Lines         635396      639258       +3862     
  Branches       46933       47179        +246     
===================================================
+ Hits          480668      486003       +5335     
+ Misses        151270      149752       -1518     
- Partials        3458        3503         +45     

Flag	Coverage Δ
Debug	76.02611% <0.00000%> (+0.37753%)	:arrow_up:
integration	18.15388% <0.00000%> (-0.12852%)	:arrow_down:
production	49.77987% <0.00000%> (+0.57588%)	:arrow_up:
test	97.02820% <ø> (+0.00127%)	:arrow_up:
unit	46.97469% <0.00000%> (+0.82588%)	:arrow_up:

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[lonitra]

Changes seem fine to me, but could we do testing on this to make sure there are no other regressions

[Philip-Wang01]

Tested private dlls for this PR, here is the result.

For 11456, issue3(An error was detected by using Accessibility Insight tool for the "Page 1 of document" pattern) has been fixed. Currently only Narrator can't announce “Generating Previews”, NVDA and JAWS can announce it correctly, and isDialog and AccessibleName properties are correct.

For 12358, three regression HDPI issues (compared with the behaviors in .NET 8.0) still repro. See details in the team's channel.

[Tanya-Solyanik]

@Epica3055 - what accessible properties differ between the Label and the LinkLabel? Let's review them and any important property, like ControlType, can be fixed in a custom accessible object.

[Epica3055]

@Tanya-Solyanik I created a demo project.

[Tanya-Solyanik]

Name and Automation Id properties are in your control, it will be set here - internal Label _messageLabel; The problem is the child heirarchy. Could you please try to get rid of it, start by not having any links, then if that does not work, implement a custom accessible object that overrides the Navigation methods - FragmentNavigate, GetChild, GetChildCount

[Philip-Wang01]

Tested private dlls for this PR, here is the result.

For https://github.com/dotnet/winforms/issues/11456, One behavior needs to be confirmed. Narrator still can't announce “Generating Previews”, NVDA announce it correctly, and isDialog and AccessibleName properties are correct.

For https://github.com/dotnet/winforms/issues/12358, all HDPI issues have been fixed and there are no new regressions.

[Tanya-Solyanik]

Please investigate how to override AccessibleRole and ControlType for the new object

[Epica3055]

@Tanya-Solyanik

When we focus on LinkLabel using AccessibleTool, we actually focus on Link. So we need to change Link AccessibleRole , please review latest commit in this pr to see if that's acceptable.

[Epica3055]

@Tanya-Solyanik do you think the three issues described in test report by test team acceptable?