dotnet/winforms

[Dark Mode] The BackColor of the ProgressBar control should not be changed

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#11,938 建立於 2024年8月20日

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area-DarkModehelp wanted

描述

.NET version

9.0.100-rc.1.24418.2 + build private dll from 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

In Dark Mode, the BackColor of the ProgressBar control will change to red when its BackColor property is set to red The BackColor of the ProgressBar will not be changed in Classic Mode

Dark Mode image

Classic Mode image

Steps to reproduce

  1. Create a WinForms .NET Core application with ProgressBar control
  2. Enable DarkMode by Application.SetColorMode(SystemColorMode.Dark) in Program.cs file
  3. Set the BackColor property of the ProgressBar to red
  4. Run the application

貢獻者指南

技術棧
csharp
領域
desktop
議題類型
bug
難度面向新貢獻者的預計實作難度，1 表示很小改動，5 表示專家級工作。
3
預計時間有經驗貢獻者完成調查、實作、測試並準備 pull request 的粗略時間範圍。
1-2 days
活動狀態議題目前的可參與程度：新鮮、活躍、陳舊、阻塞或等待維護者輸入。
fresh
清晰度議題是否清楚說明預期改動、驗收標準和下一步。
clear
前置要求
C#Windows Forms
新手友善度1-100 的估計分數，表示該議題對首次貢獻者的友善程度。
50
研究方向
Investigate the ProgressBar control's BackColor property handling in dark mode. The issue is likely in the ProgressBarRenderer or the control's OnPaint method, as referenced in PR #11857. Ensure that when BackColor is explicitly set, it is not overridden by dark mode theming. The code for ProgressBar painting is in the System.Windows.Forms.ProgressBar class, and the dark mode color management is in the System.Windows.Forms.VisualStyles namespace.