dotnet/winforms

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

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#11,938 opened on 2024年8月20日

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area-DarkModehelp wanted

説明

.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

コントリビューターガイド

技術スタック
csharp
領域
desktop
Issue 種別
bug
難度新しい貢献者にとっての実装難度です。1 は非常に小さな変更、5 は専門的な作業です。
3
推定時間経験ある貢献者が調査、実装、テスト、pull request 準備にかけるおおよその時間範囲です。
1-2 days
活動状況Issue が今どれだけ取り組みやすいかを示します。新しい、活発、古い、ブロック中、またはメンテナー入力待ちなどです。
fresh
明確さ期待される変更、受け入れ条件、次の手順がどれだけ明確かを示します。
clear
前提条件
C#Windows Forms
初心者向け度初回貢献者にどれだけ取り組みやすいかを 1-100 で推定したスコアです。
50
調査方針
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.