StackPanel applies Spacing to InfoBar when IsOpen is false

[SnowyWreath]

Describe the bug

Similar to #916, StackPanel is still applying spacing between an InfoBar and its neighbors when the InfoBar is not open.

Steps to reproduce the bug

<StackPanel Spacing="24">
   <InfoBar IsOpen="True" Title="This is a title" />
   <InfoBar IsOpen="False" Title="This is a title" />
   <InfoBar IsOpen="False" Title="This is a title" />
   <InfoBar IsOpen="False" Title="This is a title" />
   <InfoBar IsOpen="True" Title="This is a title" />
</StackPanel>

Expected behavior

Spacing should only be applied between an InfoBar and a neighbor when the InfoBar is open. When an InfoBar is closed, it is collapsed for all intents and purposes, even though the control's Visibility is still equal to Visible.

Screenshots

No response

NuGet package version

None

Windows version

Windows 11 (22H2): Build 22621

Additional context

No response

[github-actions]

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Closed similar issues:

• StackPanel applies Spacing to Collapsed items (#916), similarity score: 0.78

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[kmgallahan]

My reply to #9500 applies the same here:

Would it be better to have a zero size when IsActive is False?

No. Visibility=Collapsed means collapsed. If the control collapses as a side effect of IsActive=false then others will show up to complain that the ProgressRing should retain its size when IsActive=false for their scenarios.

Just substitute IsOpen=false for IsActive=false.

Introducing side effects that are only beneficial for some scenarios is a bad idea.

[ranjeshj]

@kmgallahan is correct. We only ignore spacing for Visibility=Collapsed items. You should be able to use that property to get the desired behavior.