From 479420d05755cb3bd6fe4dc098d1c864e83635ec Mon Sep 17 00:00:00 2001
From: k-hara <k.hara.pg@gmail.com>
Date: Thu, 19 Feb 2026 17:01:55 +0900
Subject: [PATCH] Add internal methods in DataColumn

---
 components/DataTable/src/DataTable/DataColumn.cs | 14 +++++++++-----
 components/DataTable/src/DataTable/DataTable.cs  | 16 ++++++++--------
 2 files changed, 17 insertions(+), 13 deletions(-)

diff --git a/components/DataTable/src/DataTable/DataColumn.cs b/components/DataTable/src/DataTable/DataColumn.cs
index b5a6ea143..6fbb7e028 100644
--- a/components/DataTable/src/DataTable/DataColumn.cs
+++ b/components/DataTable/src/DataTable/DataColumn.cs
@@ -16,6 +16,8 @@ public partial class DataColumn : ContentControl
 
     private WeakReference<DataTable>? _parent;
 
+    internal DataTable? DataTable => _parent?.TryGetTarget(out DataTable? parent) == true ? parent : null;
+
     /// <summary>
     /// Gets or sets the width of the largest child contained within the visible <see cref="DataRow"/>s of the <see cref="DataTable"/>.
     /// </summary>
@@ -26,6 +28,12 @@ public partial class DataColumn : ContentControl
     /// </summary>
     internal GridLength CurrentWidth { get; private set; }
 
+    internal bool IsAbsolute => CurrentWidth.IsAbsolute;
+
+    internal bool IsAuto => CurrentWidth.IsAuto;
+
+    internal bool IsStar => CurrentWidth.IsStar;
+
     /// <summary>
     /// Gets or sets whether the column can be resized by the user.
     /// </summary>
@@ -118,10 +126,6 @@ private void ColumnResizedByUserSizer()
         CurrentWidth = new(this.ActualWidth);
 
         // Notify the rest of the table to update
-        if (_parent?.TryGetTarget(out DataTable? parent) == true
-            && parent != null)
-        {
-            parent.ColumnResized();
-        }
+        DataTable?.ColumnResized();
     }
 }
diff --git a/components/DataTable/src/DataTable/DataTable.cs b/components/DataTable/src/DataTable/DataTable.cs
index cb362c761..5842c30b9 100644
--- a/components/DataTable/src/DataTable/DataTable.cs
+++ b/components/DataTable/src/DataTable/DataTable.cs
@@ -58,11 +58,11 @@ protected override Size MeasureOverride(Size availableSize)
         // We only need to measure elements that are visible
         foreach (DataColumn column in elements)
         {
-            if (column.CurrentWidth.IsStar)
+            if (column.IsStar)
             {
                 proportionalUnits += column.DesiredWidth.Value;
             }
-            else if (column.CurrentWidth.IsAbsolute)
+            else if (column.IsAbsolute)
             {
                 fixedWidth += column.DesiredWidth.Value;
             }
@@ -76,11 +76,11 @@ protected override Size MeasureOverride(Size availableSize)
 
         foreach (DataColumn column in elements)
         {
-            if (column.CurrentWidth.IsStar)
+            if (column.IsStar)
             {
                 column.Measure(new Size(proportionalAmount * column.CurrentWidth.Value, availableSize.Height));
             }
-            else if (column.CurrentWidth.IsAbsolute)
+            else if (column.IsAbsolute)
             {
                 column.Measure(new Size(column.CurrentWidth.Value, availableSize.Height));
             }
@@ -120,11 +120,11 @@ protected override Size ArrangeOverride(Size finalSize)
         // We only need to measure elements that are visible
         foreach (DataColumn column in elements)
         {
-            if (column.CurrentWidth.IsStar)
+            if (column.IsStar)
             {
                 proportionalUnits += column.CurrentWidth.Value;
             }
-            else if (column.CurrentWidth.IsAbsolute)
+            else if (column.IsAbsolute)
             {
                 fixedWidth += column.CurrentWidth.Value;
             }
@@ -143,12 +143,12 @@ protected override Size ArrangeOverride(Size finalSize)
 
         foreach (DataColumn column in elements)
         {
-            if (column.CurrentWidth.IsStar)
+            if (column.IsStar)
             {
                 width = proportionalAmount * column.CurrentWidth.Value;
                 column.Arrange(new Rect(x, 0, width, finalSize.Height));
             }
-            else if (column.CurrentWidth.IsAbsolute)
+            else if (column.IsAbsolute)
             {
                 width = column.CurrentWidth.Value;
                 column.Arrange(new Rect(x, 0, width, finalSize.Height));