From 5f663914282694787ccc4514888abc828fe2747d Mon Sep 17 00:00:00 2001
From: monitor1394 <monitor1394@gmail.com>
Date: Sun, 29 Mar 2026 21:48:25 +0800
Subject: [PATCH] =?UTF-8?q?=E4=BF=AE=E5=A4=8D`Legend`=E7=9A=84`Background`?=
 =?UTF-8?q?=E5=8C=BA=E5=9F=9F=E5=9C=A8`Horizonal`=E6=A8=A1=E5=BC=8F?=
 =?UTF-8?q?=E4=B8=8B=E4=B8=8D=E5=AF=B9=E7=9A=84=E9=97=AE=E9=A2=98?=
MIME-Version: 1.0
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Content-Transfer-Encoding: 8bit

---
 Documentation~/zh/changelog.md           | 1 +
 Runtime/Component/Legend/LegendHelper.cs | 7 ++++++-
 2 files changed, 7 insertions(+), 1 deletion(-)

diff --git a/Documentation~/zh/changelog.md b/Documentation~/zh/changelog.md
index 9047891f..fe7d4a34 100644
--- a/Documentation~/zh/changelog.md
+++ b/Documentation~/zh/changelog.md
@@ -81,6 +81,7 @@ slug: /changelog
 
 ## master
 
+* (2026.03.29) 修复`Legend`的`Background`区域在`Horizonal`模式下不对的问题
 * (2026.03.25) 增加`Chart`的`Json`导出导入
 * (2026.03.10) 增加`Sankey`的线条tooltip触发显示
 * (2026.03.10) 增加`UITable`的排序功能支持
diff --git a/Runtime/Component/Legend/LegendHelper.cs b/Runtime/Component/Legend/LegendHelper.cs
index f5293a32..9604006b 100644
--- a/Runtime/Component/Legend/LegendHelper.cs
+++ b/Runtime/Component/Legend/LegendHelper.cs
@@ -198,11 +198,14 @@ namespace XCharts.Runtime
             legend.context.eachHeight = 0;
             if (legend.orient == Orient.Horizonal)
             {
+                var maxRowWidth = 0f;
                 foreach (var kv in legend.context.buttonList)
                 {
                     if (width + kv.Value.width > maxWidth)
                     {
                         realWidth = width - legend.itemGap;
+                        if (realWidth > maxRowWidth)
+                            maxRowWidth = realWidth;
                         realHeight += height + legend.itemGap;
                         if (legend.context.eachHeight < height + legend.itemGap)
                         {
@@ -216,8 +219,10 @@ namespace XCharts.Runtime
                         height = kv.Value.height;
                 }
                 width -= legend.itemGap;
+                if (width > maxRowWidth)
+                    maxRowWidth = width;
                 legend.context.height = realHeight + height;
-                legend.context.width = realWidth > 0 ? realWidth : width;
+                legend.context.width = maxRowWidth;
             }
             else
             {