From a44eca0f9139373c23c64e7ca7ba2ca46123a5af Mon Sep 17 00:00:00 2001
From: monitor1394 <monitor1394@gmail.com>
Date: Fri, 2 Sep 2022 08:33:34 +0800
Subject: [PATCH] [feature][pie] support `onPointerEnterPie`

---
 CHANGELOG.md                      |  1 +
 Runtime/Internal/BaseChart.API.cs |  8 +++++++-
 Runtime/Internal/BaseChart.cs     |  1 +
 Runtime/Serie/Pie/PieHandler.cs   | 15 ++++++++++++++-
 4 files changed, 23 insertions(+), 2 deletions(-)

diff --git a/CHANGELOG.md b/CHANGELOG.md
index 5b3ea8f1..ea92c446 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -58,6 +58,7 @@
 
 ## master
 
+* (2022.09.02) 增加`onPointerEnterPie`回调支持
 * (2022.09.02) 优化`HeatmapChart`
 * (2022.08.30) 优化`RadarChart`
 * (2022.08.30) 修复`DataZoom`在某些情况下计算范围不准确的问题 (#221)
diff --git a/Runtime/Internal/BaseChart.API.cs b/Runtime/Internal/BaseChart.API.cs
index c0034efb..db3b70f9 100644
--- a/Runtime/Internal/BaseChart.API.cs
+++ b/Runtime/Internal/BaseChart.API.cs
@@ -96,11 +96,17 @@ namespace XCharts.Runtime
         /// </summary>
         public CustomDrawGaugePointerFunction customDrawGaugePointerFunction { set { m_CustomDrawGaugePointerFunction = value; } get { return m_CustomDrawGaugePointerFunction; } }
         /// <summary>
-        /// the callback function of click pie area.
+        /// the callback function of pointer click pie area.
         /// |点击饼图区域回调。参数：PointerEventData，SerieIndex，SerieDataIndex
         /// </summary>
         public Action<PointerEventData, int, int> onPointerClickPie { set { m_OnPointerClickPie = value; m_ForceOpenRaycastTarget = true; } get { return m_OnPointerClickPie; } }
         /// <summary>
+        /// the callback function of pointer enter pie area.
+        /// |鼠标进入和离开饼图区域回调，SerieDataIndex为-1时表示离开。参数：PointerEventData，SerieIndex，SerieDataIndex
+        /// </summary>
+        [Since("v3.3.0")]
+        public Action<int, int> onPointerEnterPie { set { m_OnPointerEnterPie = value; m_ForceOpenRaycastTarget = true; } get { return m_OnPointerEnterPie; } }
+        /// <summary>
         /// the callback function of click bar.
         /// |点击柱形图柱条回调。参数：eventData, dataIndex
         /// </summary>
diff --git a/Runtime/Internal/BaseChart.cs b/Runtime/Internal/BaseChart.cs
index fdbf414e..3aa80d66 100644
--- a/Runtime/Internal/BaseChart.cs
+++ b/Runtime/Internal/BaseChart.cs
@@ -86,6 +86,7 @@ namespace XCharts.Runtime
         protected Action<VertexHelper, Serie> m_OnDrawSerieBefore;
         protected Action<VertexHelper, Serie> m_OnDrawSerieAfter;
         protected Action<PointerEventData, int, int> m_OnPointerClickPie;
+        protected Action<int, int> m_OnPointerEnterPie;
         protected Action<PointerEventData, int> m_OnPointerClickBar;
         protected Action<Axis, double> m_OnAxisPointerValueChanged;
         protected Action<Legend, int, string, bool> m_OnLegendClick;
diff --git a/Runtime/Serie/Pie/PieHandler.cs b/Runtime/Serie/Pie/PieHandler.cs
index 966ebe01..3be3b1c9 100644
--- a/Runtime/Serie/Pie/PieHandler.cs
+++ b/Runtime/Serie/Pie/PieHandler.cs
@@ -123,6 +123,10 @@ namespace XCharts.Runtime
                         serieData.context.highlight = false;
                         serieData.interact.SetValueAndColor(ref needInteract, serieData.context.outsideRadius, color, toColor);
                     }
+                    if (chart.onPointerEnterPie != null)
+                    {
+                        chart.onPointerEnterPie(serie.index, serie.context.pointerItemDataIndex);
+                    }
                     if (needInteract)
                     {
                         chart.RefreshPainter(serie);
@@ -131,8 +135,9 @@ namespace XCharts.Runtime
                 return;
             }
             m_LastCheckContextFlag = needCheck;
-            serie.context.pointerItemDataIndex = -1;
+            var lastPointerItemDataIndex = serie.context.pointerItemDataIndex;
             var dataIndex = GetPiePosIndex(serie, chart.pointerPos);
+            serie.context.pointerItemDataIndex = -1;
             for (int i = 0; i < serie.dataCount; i++)
             {
                 var serieData = serie.data[i];
@@ -154,6 +159,14 @@ namespace XCharts.Runtime
                     serieData.interact.SetValueAndColor(ref needInteract, serieData.context.outsideRadius, color, toColor);
                 }
             }
+            if (lastPointerItemDataIndex != serie.context.pointerItemDataIndex)
+            {
+                needInteract = true;
+                if (chart.onPointerEnterPie != null)
+                {
+                    chart.onPointerEnterPie(serie.index, serie.context.pointerItemDataIndex);
+                }
+            }
             if (needInteract)
             {
                 chart.RefreshPainter(serie);