dotnet/winforms

ContextMenuStrip not opening when moving window on secondary display

Open

#4,084 opened on Oct 11, 2020

View on GitHub
 (6 comments) (0 reactions) (0 assignees)C# (922 forks)batch import
:beetle: bugarea-HDPIarea-controls-StripControlshelp wanted

Repository metrics

Stars
 (4,100 stars)
PR merge metrics
 (Avg merge 14d 22h) (56 merged PRs in 30d)

Description

  • .NET Core Version: 3.1
  • Have you experienced this same bug with .NET Framework?: Haven't tried. I need to use .NET Core

Problem description: Given

  • a WPF app
  • that uses the WinForms ContextMenuStrip
  • in a dual monitor setup
  • when moving the MainWindow to the secondary monitor
  • the context menu does not display at all

Expected behavior: The context menu is displayed

Minimal repro: Repo: https://github.com/ccornici/tray_context_menu_bug

Demo (contained in the repo too) ctx_bug

Other details:

  • All other tray icons from other apps (ex: Spotify, NVidia Control Panel etc) work as expected. So it doesn't look like a WIn 10 bug that affects any and all tray icons.
  • The Opening event of the ContextMenuStrip gets fired. It simply doesn't display the context menu...

Contributor guide

Research direction
Investigate why ContextMenuStrip does not show on secondary monitor. Check coordinate calculations, DPI awareness, and WPF interop.
Tech stack
csharp
Domain
desktop
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.
1-3 hours
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
C#Windows FormsDebugging
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
60