[feature][datazoom] 增加DataZoom的MarqueeStyle支持框选区域

Examples/Example04_DataZoom.cs

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+using UnityEngine;
+using XCharts.Runtime;
+
+namespace XCharts.Example
+{
+    [DisallowMultipleComponent]
+    [ExecuteInEditMode]
+    public class Example04_DataZoom : MonoBehaviour
+    {
+        BaseChart chart;
+
+        void Awake()
+        {
+            chart = gameObject.GetComponent<BaseChart>();
+            if (chart == null) return;
+            var dataZoom = chart.GetChartComponent<DataZoom>();
+            if (dataZoom == null) return;
+            dataZoom.marqueeStyle.onStart = OnMarqueeStart;
+            dataZoom.marqueeStyle.onEnd = OnMarqueeEnd;
+            dataZoom.marqueeStyle.onGoing = OnMarquee;
+        }
+
+        void OnMarqueeStart(DataZoom dataZoom)
+        {
+            //Debug.Log("OnMarqueeStart:" + dataZoom);
+        }
+
+        void OnMarquee(DataZoom dataZoom)
+        {
+            //Debug.Log("OnMarquee:" + dataZoom);
+        }
+
+        void OnMarqueeEnd(DataZoom dataZoom)
+        {
+            //Debug.Log("OnMarqueeEnd:" + dataZoom);
+            var serie = chart.GetSerie(0);
+            foreach (var serieData in serie.data)
+            {
+                if (dataZoom.IsInMarqueeArea(serieData))
+                {
+                    serieData.GetOrAddComponent<ItemStyle>().color = Color.red;
+                }
+                else
+                {
+                    serieData.GetOrAddComponent<ItemStyle>().color = Color.clear;
+                }
+            }
+        }
+    }
+}

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