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Fix SegmentedItem visibility issue #728

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Fix SegmentedItem visibility issue #728

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12 changes: 12 additions & 0 deletions components/Segmented/src/SegmentedItem/SegmentedItem.cs
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Original file line number Diff line number Diff line change
Expand Up @@ -2,6 +2,7 @@
// The .NET Foundation licenses this file to you under the MIT license.
// See the LICENSE file in the project root for more information.


namespace CommunityToolkit.WinUI.Controls;

/// <summary>
Expand All @@ -20,6 +21,17 @@ public partial class SegmentedItem : ListViewItem
public SegmentedItem()
{
this.DefaultStyleKey = typeof(SegmentedItem);
RegisterPropertyChangedCallback(VisibilityProperty, OnVisibilityChanged);
}

private void OnVisibilityChanged(DependencyObject sender, DependencyProperty dp)
{
// If the parent is a Segmented control with an EqualPanel,
// we need to invalidate measure to update the layout.
if ((this.Parent as Segmented)?.ItemsPanelRoot is EqualPanel panel)
{
panel.InvalidateMeasure();
}
}

/// <inheritdoc/>
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