重构VisualMap和DataZoom

Runtime/API/BaseChart_API.cs

@@ -70,6 +70,18 @@ namespace XCharts
         /// </summary>
         public Settings settings { get { return m_Settings; } }
         /// <summary>
+        /// dataZoom component.
+        /// 区域缩放组件。
+        /// </summary>
+        public DataZoom dataZoom { get { return m_DataZooms.Count > 0 ? m_DataZooms[0] : null; } }
+        public List<DataZoom> dataZooms { get { return m_DataZooms; } }
+        /// <summary>
+        /// visualMap component.
+        /// 视觉映射组件。
+        /// </summary>
+        public VisualMap visualMap { get { return m_VisualMaps.Count > 0 ? m_VisualMaps[0] : null; } }
+        public List<VisualMap> visualMaps { get { return m_VisualMaps; } }
+        /// <summary>
         /// The x of chart. 
         /// 图表的X
         /// </summary>

Runtime/API/BaseGraph_API.cs

@@ -163,5 +163,16 @@ namespace XCharts
             ChartHelper.DestroyAllChildren(transform);
             //SetAllComponentDirty();
         }
+
+        public bool ScreenPointToChartPoint(Vector2 screenPoint, out Vector2 chartPoint)
+        {
+            var cam = canvas.renderMode == RenderMode.ScreenSpaceOverlay ? null : canvas.worldCamera;
+            if (!RectTransformUtility.ScreenPointToLocalPointInRectangle(rectTransform,
+                screenPoint, cam, out chartPoint))
+            {
+                return false;
+            }
+            return true;
+        }
     }
 }

Runtime/API/CoordinateChart_API.cs

@@ -33,16 +33,7 @@ namespace XCharts
         /// 两个y轴。
         /// </summary>
         public List<YAxis> yAxes { get { return m_YAxes; } }
-        /// <summary>
-        /// dataZoom component.
-        /// 区域缩放组件。
-        /// </summary>
-        public DataZoom dataZoom { get { return m_DataZooms.Count > 0 ? m_DataZooms[0] : null; } }
-        /// <summary>
-        /// visualMap component.
-        /// 视觉映射组件。
-        /// </summary>
-        public VisualMap visualMap { get { return m_VisualMaps.Count > 0 ? m_VisualMaps[0] : null; } }
+
         /// <summary>
         /// X轴（下）
         /// </summary>
@@ -204,7 +195,13 @@ namespace XCharts
         /// </summary>
         public void RefreshDataZoom()
         {
-            RefreshDataZoomLabel();
+            foreach (var handler in m_ComponentHandlers)
+            {
+                if (handler is DataZoomHandler)
+                {
+                    (handler as DataZoomHandler).RefreshDataZoomLabel();
+                }
+            }
         }
 
         /// <summary>