fix: #1791

src/Avalonia/HandyControl_Avalonia/Controls/Panel/UniformSpacingPanel.cs

@@ -163,6 +163,7 @@ public class UniformSpacingPanel : Panel
             for (int i = 0, count = Children.Count; i < count; ++i)
             {
                 var child = Children[i];
+                if (!child.IsVisible) continue;
 
                 if (itemHorizontalAlignmentSet)
                 {
@@ -192,6 +193,7 @@ public class UniformSpacingPanel : Panel
             for (int i = 0, count = Children.Count; i < count; i++)
             {
                 var child = Children[i];
+                if (!child.IsVisible) continue;
 
                 if (itemHorizontalAlignmentSet)
                 {
@@ -258,6 +260,7 @@ public class UniformSpacingPanel : Panel
             for (int i = 0, count = Children.Count; i < count; i++)
             {
                 var child = Children[i];
+                if (!child.IsVisible) continue;
 
                 var sz = new PanelUvSize(
                     _orientation,
@@ -327,6 +330,7 @@ public class UniformSpacingPanel : Panel
         for (int i = 0; i < Children.Count; i++)
         {
             Control child = Children[i];
+            if (!child.IsVisible) continue;
             var childSize = new PanelUvSize(orientation, child.DesiredSize);
             double layoutSlotU = useItemU ? itemU : childSize.U;
 
@@ -354,6 +358,7 @@ public class UniformSpacingPanel : Panel
         for (int i = start; i < end; i++)
         {
             var child = Children[i];
+            if (!child.IsVisible) continue;
 
             var childSize = new PanelUvSize(_orientation, child.DesiredSize);
             double layoutSlotU = useItemU ? itemU : childSize.U;

src/Shared/HandyControl_Shared/Controls/Panel/CirclePanel.cs

@@ -1,4 +1,5 @@
 using System;
+using System.Linq;
 using System.Windows;
 using System.Windows.Controls;
 using System.Windows.Media;
@@ -38,12 +39,13 @@ public class CirclePanel : Panel
     protected override Size MeasureOverride(Size availableSize)
     {
         var diameter = Diameter;
+        var layoutChildren = Children.OfType<UIElement>().Where(element => element.Visibility != Visibility.Collapsed).ToList();
 
-        if (Children.Count == 0) return new Size(diameter, diameter);
+        if (layoutChildren.Count == 0) return new Size(diameter, diameter);
 
         var newSize = new Size(diameter, diameter);
 
-        foreach (UIElement element in Children)
+        foreach (var element in layoutChildren)
         {
             element.Measure(newSize);
         }
@@ -55,12 +57,18 @@ public class CirclePanel : Panel
     {
         var keepVertical = KeepVertical;
         var offsetAngle = OffsetAngle;
+        var layoutChildren = Children.OfType<UIElement>().Where(element => element.Visibility != Visibility.Collapsed).ToList();
+
+        if (layoutChildren.Count == 0)
+        {
+            return finalSize;
+        }
 
         var i = 0;
-        var perDeg = 360.0 / Children.Count;
+        var perDeg = 360.0 / layoutChildren.Count;
         var radius = Diameter / 2;
 
-        foreach (UIElement element in Children)
+        foreach (var element in layoutChildren)
         {
             var centerX = element.DesiredSize.Width / 2.0;
             var centerY = element.DesiredSize.Height / 2.0;

src/Shared/HandyControl_Shared/Controls/Panel/HoneycombPanel.cs

@@ -1,4 +1,5 @@
 using System;
+using System.Linq;
 using System.Windows;
 using System.Windows.Controls;
 
@@ -60,21 +61,19 @@ public class HoneycombPanel : Panel
     protected override Size MeasureOverride(Size availableSize)
     {
         var maxSize = new Size();
+        var layoutChildren = InternalChildren.Cast<UIElement>().Where(child => child != null && child.Visibility != Visibility.Collapsed).ToList();
 
-        foreach (UIElement child in InternalChildren)
+        foreach (var child in layoutChildren)
         {
-            if (child != null)
-            {
-                child.Measure(availableSize);
-                maxSize.Width = Math.Max(maxSize.Width, child.DesiredSize.Width);
-                maxSize.Height = Math.Max(maxSize.Height, child.DesiredSize.Height);
-            }
+            child.Measure(availableSize);
+            maxSize.Width = Math.Max(maxSize.Width, child.DesiredSize.Width);
+            maxSize.Height = Math.Max(maxSize.Height, child.DesiredSize.Height);
         }
 
         _unitLength = Math.Max(maxSize.Width, maxSize.Height) / 2;
 
-        var xCount = GetXCount(InternalChildren.Count);
-        var yCount = GetYCount(InternalChildren.Count);
+        var xCount = GetXCount(layoutChildren.Count);
+        var yCount = GetYCount(layoutChildren.Count);
 
         var availableWidth = xCount * _unitLength;
         var availableHeight = yCount * Math.Pow(3, 0.5) * _unitLength + _unitLength * 2;
@@ -90,6 +89,7 @@ public class HoneycombPanel : Panel
 
         foreach (UIElement child in InternalChildren)
         {
+            if (child == null || child.Visibility == Visibility.Collapsed) continue;
             child.Arrange(_stuffer.Move());
         }
 

src/Shared/HandyControl_Shared/Controls/Panel/UniformSpacingPanel.cs

@@ -138,7 +138,7 @@ public class UniformSpacingPanel : Panel
         for (var i = start; i < end; i++)
         {
             var child = children[i];
-            if (child == null) continue;
+            if (child == null || child.Visibility == Visibility.Collapsed) continue;
 
             var childSize = new PanelUvSize(_orientation, child.DesiredSize);
             var layoutSlotU = useItemU ? itemU : childSize.U;
@@ -161,7 +161,7 @@ public class UniformSpacingPanel : Panel
         for (var i = 0; i < children.Count; i++)
         {
             var child = children[i];
-            if (child == null) continue;
+            if (child == null || child.Visibility == Visibility.Collapsed) continue;
 
             var childSize = new PanelUvSize(_orientation, child.DesiredSize);
             var layoutSlotU = useItemU ? itemU : childSize.U;
@@ -214,7 +214,7 @@ public class UniformSpacingPanel : Panel
             for (int i = 0, count = children.Count; i < count; ++i)
             {
                 var child = children[i];
-                if (child == null) continue;
+                if (child == null || child.Visibility == Visibility.Collapsed) continue;
 
                 if (itemHorizontalAlignmentSet)
                 {
@@ -244,7 +244,7 @@ public class UniformSpacingPanel : Panel
             for (int i = 0, count = children.Count; i < count; i++)
             {
                 var child = children[i];
-                if (child == null) continue;
+                if (child == null || child.Visibility == Visibility.Collapsed) continue;
 
                 if (itemHorizontalAlignmentSet)
                 {
@@ -336,7 +336,7 @@ public class UniformSpacingPanel : Panel
             for (int i = 0, count = children.Count; i < count; i++)
             {
                 var child = children[i];
-                if (child == null) continue;
+                if (child == null || child.Visibility == Visibility.Collapsed) continue;
 
                 var sz = new PanelUvSize(
                     _orientation,