From 8c6d013341c5f135812874add228fa17e42f8c5b Mon Sep 17 00:00:00 2001
From: monitor1394 <monitor1394@gmail.com>
Date: Sun, 26 Feb 2023 22:49:19 +0800
Subject: [PATCH] =?UTF-8?q?=E5=A2=9E=E5=8A=A0`DataZoom`=E7=9A=84`startEndF?=
 =?UTF-8?q?unction`=E5=A7=94=E6=89=98?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 Documentation~/zh/changelog.md                | 1 +
 Runtime/Component/DataZoom/DataZoom.cs        | 5 +++++
 Runtime/Component/DataZoom/DataZoomHandler.cs | 2 ++
 Runtime/Internal/Misc/DelegateFunction.cs     | 6 ++++++
 4 files changed, 14 insertions(+)

diff --git a/Documentation~/zh/changelog.md b/Documentation~/zh/changelog.md
index 4de6548a..c1561784 100644
--- a/Documentation~/zh/changelog.md
+++ b/Documentation~/zh/changelog.md
@@ -65,6 +65,7 @@ slug: /changelog
 
 ## master
 
+* (2023.02.26) 增加`DataZoom`的`startEndFunction`委托
 * (2023.02.12) 重构`Component`相关代码，调整API接口
 * (2023.02.10) 修复`Axis`在`Log`轴时某些情况下最小值不正确的问题
 * (2023.02.10) 优化`Axis`的数值`Label`的默认显示格式
diff --git a/Runtime/Component/DataZoom/DataZoom.cs b/Runtime/Component/DataZoom/DataZoom.cs
index 27b82507..84cf83ad 100644
--- a/Runtime/Component/DataZoom/DataZoom.cs
+++ b/Runtime/Component/DataZoom/DataZoom.cs
@@ -93,6 +93,7 @@ namespace XCharts.Runtime
         [SerializeField][Since("v3.6.0")] private bool m_EndLock;
 
         public DataZoomContext context = new DataZoomContext();
+        private CustomDataZoomStartEndFunction m_StartEndFunction;
 
         /// <summary>
         /// Whether to show dataZoom.
@@ -393,6 +394,10 @@ namespace XCharts.Runtime
             get { return m_MarqueeStyle; }
             set { if (PropertyUtil.SetClass(ref m_MarqueeStyle, value)) SetAllDirty(); }
         }
+        /// <summary>
+        /// start和end变更委托。
+        /// </summary>
+        public CustomDataZoomStartEndFunction startEndFunction { get { return m_StartEndFunction; } set { m_StartEndFunction = value; } }
 
         class AxisIndexValueInfo
         {
diff --git a/Runtime/Component/DataZoom/DataZoomHandler.cs b/Runtime/Component/DataZoom/DataZoomHandler.cs
index fd06635d..a98cd540 100644
--- a/Runtime/Component/DataZoom/DataZoomHandler.cs
+++ b/Runtime/Component/DataZoom/DataZoomHandler.cs
@@ -397,6 +397,8 @@ namespace XCharts.Runtime
 
             if (end < start)
                 end = start;
+            if (dataZoom.startEndFunction != null)
+                dataZoom.startEndFunction(ref start, ref end);
 
             if (!dataZoom.startLock)
                 dataZoom.start = start;
diff --git a/Runtime/Internal/Misc/DelegateFunction.cs b/Runtime/Internal/Misc/DelegateFunction.cs
index 224616bd..15b1e9db 100644
--- a/Runtime/Internal/Misc/DelegateFunction.cs
+++ b/Runtime/Internal/Misc/DelegateFunction.cs
@@ -22,4 +22,10 @@ namespace XCharts.Runtime
     /// <returns></returns>
     public delegate float SymbolSizeFunction(List<double> data);
     public delegate void CustomDrawGaugePointerFunction(VertexHelper vh, int serieIndex, int dataIndex, float currentAngle);
+    /// <summary>
+    /// DataZoom的start和end变更时的委托方法。
+    /// </summary>
+    /// <param name="start"></param>
+    /// <param name="end"></param>
+    public delegate void CustomDataZoomStartEndFunction(ref float start, ref float end);
 }
\ No newline at end of file