Fix issue 14210: [Dark Mode] The ListView cannot display the items when setting the Enable as false

[SimonZhao888]

Fixes #14210

Root Cause

ListView is the underlaying Win32 control. When it's in dark mode, the font color is highlighted, but the background color isn't set to dark, causing the items in the ListView to not display correctly. Furthermore, we cannot modify the background color using following code PInvokeCore.SendMessage(this, PInvoke.LVM_SETBKCOLOR, (WPARAM)0, (LPARAM)BackColor).

Proposed changes

• In Dark Mode, when the ListView control is disabled (Enabled = false), the text and background colors are set so that the items can be displayed correctly.

Customer Impact

• The ListView can display the items correctly when it is in DarkMode and setting the Enable as false.

Regression?

• Yes

Risk

• Min

Screenshots

Before

After

Test methodology

• Manually

Accessibility testing

Test environment(s)

• .net 11.0.100-alpha.1.25618.104

Microsoft Reviewers: Open in CodeFlow

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Codecov Report

❌ Patch coverage is 0% with 5 lines in your changes missing coverage. Please review.
✅ Project coverage is 77.17234%. Comparing base (ff0d8d0) to head (0de26b3).
⚠️ Report is 10 commits behind head on main.

Additional details and impacted files

@@                 Coverage Diff                 @@
##                main      #14219         +/-   ##
===================================================
+ Coverage   77.15694%   77.17234%   +0.01539%     
===================================================
  Files           3279        3279                 
  Lines         645347      645064        -283     
  Branches       47721       47723          +2     
===================================================
- Hits          497930      497811        -119     
+ Misses        143729      143560        -169     
- Partials        3688        3693          +5     

Flag	Coverage Δ
Debug	77.17234% <0.00000%> (+0.01539%)	⬆️
integration	18.98921% <0.00000%> (-0.00734%)	⬇️
production	52.03647% <0.00000%> (+0.00965%)	⬆️
test	97.40560% <ø> (+0.00001%)	⬆️
unit	49.46068% <0.00000%> (-0.00505%)	⬇️

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Pull request overview

This pull request addresses issue #14210 where ListView items are not displayed correctly when the control is disabled (Enabled = false) in dark mode. The root cause is that the underlying Win32 ListView control has a light font color in dark mode but doesn't have its background color properly set to dark, making the items invisible or hard to see.

Changes:

• Adds conditional color handling in the CustomDraw method for disabled ListViews in dark mode
• Sets specific text and background colors to improve visibility when the control is disabled and dark mode is enabled

[ricardobossan]

All LGTM!

[LeafShi1]

Is it necessary to set the text background separately?

Just a suggestion: Using InactiveCaptionText can make the disabled state more noticeable.