dotnet/winforms

[Dark Mode] Focused TrackBar in dark mode lacks contrast, needs more visual guidance.

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#11,915 opened on Aug 19, 2024

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Description

.NET version

9.0.0-rc.1.24414.1 + build private dll form winforms repo main branch

Did it work in .NET Framework?

No

Did it work in any of the earlier releases of .NET Core or .NET 5+?

This is a new feature Dark Mode: https://github.com/dotnet/winforms/pull/11857

Issue description

The cursor of TrackBar controls should have the visible color when using mouse hover on it GetImage (1)

Steps to reproduce

  1. Create a WinForms .NET Core application with TrackBar control.
  2. Enable DarkMode by Application.SetColorMode(SystemColorMode.Dark) in Program.cs file.
  3. Run the application.
  4. Using mouse hover on it

Contributor guide

Tech stack
csharp
Domain
desktopaccessibility
Issue type
bug
DifficultyEstimated implementation difficulty for a new contributor, from 1 for very small changes to 5 for expert-level work.
2
Estimated timeA rough time range for an experienced contributor to investigate, implement, test, and prepare a pull request.
under 1 hour
Activity statusHow available the issue appears right now: fresh, active, stale, blocked, or waiting on maintainer input.
active
ClarityHow clearly the issue explains the expected change, acceptance criteria, and next step.
clear
Prerequisites
Basic knowledge of Windows Forms renderingFamiliarity with dark mode implementation in WinForms
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
75
Research direction
Investigate the TrackBar control's rendering code for dark mode, likely in files such as TrackBarRenderer.cs or related theming code. The referenced PR #11857 introduced dark mode support; focus on the portion handling cursor/hover appearance. Examine existing comments in the issue to understand expected contrast levels.