(Marquee) When Behavior="Looping" and Direction is set to vertical, it causes “Layout cycle detected. Layout could not complete.” #755
Description
Describe the bug
I noticed that the Marquee control crashes. After debugging, I believe the SizeChanged event causes the visibility of segment2 to change. Since the control’s default vertical alignment is set to Top, this triggers another SizeChanged event, resulting in an infinite loop.
Setting VerticalAlignment="Stretch" allows it to work correctly, but this is not a real solution.
In addition, I noticed that _marqueeContainer is repeatedly subscribing to the SizeChanged event.
Steps to reproduce
<labs:Marquee
Behavior="Looping"
Content="Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua."
Direction="Down"
FontSize="18"
RepeatBehavior="Forever"
Speed="200" />
Just setting Behavior="Looping" is enough to trigger the crash.
Expected behavior
This shouldn't cause the program to crash.
Screenshots
Code Platform
- UWP
- WinAppSDK / WinUI 3
- Web Assembly (WASM)
- Android
- iOS
- MacOS
- Linux / GTK
Windows Build Number
- Windows 10 1809 (Build 17763)
- Windows 10 1903 (Build 18362)
- Windows 10 1909 (Build 18363)
- Windows 10 2004 (Build 19041)
- Windows 10 20H2 (Build 19042)
- Windows 10 21H1 (Build 19043)
- Windows 11 21H2 (Build 22000)
- Other (specify)
Other Windows Build number
No response
App minimum and target SDK version
- Windows 10, version 1809 (Build 17763)
- Windows 10, version 1903 (Build 18362)
- Windows 10, version 1909 (Build 18363)
- Windows 10, version 2004 (Build 19041)
- Other (specify)
Other SDK version
No response
Visual Studio Version
No response
Visual Studio Build Number
No response
Device form factor
No response
Additional context
No response